消息图标
跳至页脚内容
  1. IronPDF
  2. IronPDF博客
  3. 使用IronPDF
  4. .NET PDF API
使用IRONPDF

如何使用IronPDF创建.NET PDF API

Curtis Chau
Curtis Chau
已更新:

在使用现代应用程序时，像您这样的.NET开发人员可能会发现需要构建一个集中的PDF生成服务。无论您是生成发票、报告、证书或合同，拥有一个专门的.NET PDF API对于高效管理PDF文件都是有益的。 那么它如何改善您的PDF生成任务呢？ 它通过在桌面和Web应用程序之间提供一致性、可维护性和可扩展性来实现这一点。 从未有过如此轻松地管理文档内容、PDF页面和PDF表单字段。

在本教程中，您将学习如何使用ASP.NET Core和IronPDF，一个强大的.NET PDF库，构建一个可用于生产的PDF API。 我们将创建可以从HTML生成PDF、合并文档、添加水印并处理Web API中各种实际PDF生成场景的RESTful端点。

为什么构建一个专门的PDF API？

在深入研究代码之前，让我们了解为什么创建一个专门的PDF API是有意义的：

  • 集中化逻辑：所有 PDF 生成逻辑集中于一处，便于维护和更新
  • 微服务架构：非常适合面向服务的架构，其中不同应用程序需要 PDF 功能
  • 性能优化：更容易为大型PDF文件、多页面和动态数据优化和扩展专用服务。
  • 语言无关：无论使用何种编程语言，任何客户端应用程序均可调用该 API
  • 输出一致性：确保整个组织的所有PDF文档都保持一致的文档布局、段落格式和PDF内容。

准备好开始构建了吗？ 下载IronPDF的免费试用版，并按此教程一起编程实现.NET Framework项目中的PDF文件创建。

IronPDF: 完整的.NET PDF库

IronPDF被认为是.NET开发人员的首选PDF库，提供了一套全面的功能，使Web API项目中的PDF生成过程简单可靠。 它建立在Chrome渲染引擎上，确保像素级精准的HTML到PDF转换，通常只需几行代码即可完成。 这在保持所有样式、JavaScript执行和响应布局的同时完成。

使IronPDF成为.NET PDF API开发的理想选择的关键能力有：

  • 基于 Chrome 的渲染：利用 Google Chrome 的渲染引擎，将 PDF 文档从 HTML 内容中准确转换，并完全支持嵌入的图像和其他 Web 资源
  • 丰富的功能集：支持对新文档和现有文档进行编辑，包括数字签名、PDF 表单、批注、加密、压缩等功能
  • 创建安全的PDF文档： 使用加密、数字签名和文档保护来管理敏感的PDF内容。
  • 多种输入格式：支持使用 HTML、URL、图片和 Office 文档创建 PDF 文档
  • 高级操作：合并PDF页面、拆分文档、应用水印、创建互动PDF表单，并以编程方式操作PDF文件。
  • 跨平台支持：可在 Windows、Linux、macOS、Docker 及云平台上运行
  • 性能优化：异步操作、高效的内存管理以及快速的渲染

如何设置您的PDF文档API项目？

让我们从创建一个新的ASP.NET Core Web API项目并安装必要的包开始。

前提条件

  • .NET 6.0 SDK或更高版本
  • Visual Studio 2022或Visual Studio Code
  • Postman或类似的API测试工具，以测试您的PDF REST API

创建项目

首先，让我们创建一个项目，我们将在其中构建我们的PDF生成工具。

dotnet new webapi -n PdfApiService
cd PdfApiService

安装 IronPDF。

下一步是通过NuGet将IronPDF添加到您的项目中：

dotnet add package IronPdf

或者，在Visual Studio中使用NuGet包管理器控制台：

Install-Package IronPdf

项目结构

C#开发的一个重要方面是保持一个干净且结构良好的项目文件夹。 例如：

如何创建您的第一个PDF端点？

让我们构建一个简单的端点，将HTML转换为PDF格式。 首先，创建服务接口和实现：

创建PDF服务

首先，我们将在我们的IPdfService.cs文件中添加以下内容：

public interface IPdfService
{
    byte[] GeneratePdfFromHtml(string htmlContent);
    byte[] GeneratePdfFromUrl(string url);
}
public interface IPdfService
{
    byte[] GeneratePdfFromHtml(string htmlContent);
    byte[] GeneratePdfFromUrl(string url);
}
Public Interface IPdfService
    Function GeneratePdfFromHtml(htmlContent As String) As Byte()
    Function GeneratePdfFromUrl(url As String) As Byte()
End Interface
$vbLabelText   $csharpLabel

在PdfService.cs文件中，我们将添加：

using IronPdf;
public class PdfService : IPdfService
{
    private readonly ChromePdfRenderer _renderer;
    public PdfService()
    {
        _renderer = new ChromePdfRenderer();
        // Configure rendering options for optimal PDF generation in .NET
        _renderer.RenderingOptions.MarginTop = 20;
        _renderer.RenderingOptions.MarginBottom = 20;
        _renderer.RenderingOptions.PrintHtmlBackgrounds = true;
    }
    public byte[] GeneratePdfFromHtml(string htmlContent)
    {
        // Generate PDF from HTML using the .NET PDF API
        var pdf = _renderer.RenderHtmlAsPdf(htmlContent);
        return pdf.BinaryData;
    }
    public byte[] GeneratePdfFromUrl(string url)
    {
        // Convert URL to PDF in the REST API
        var pdf = _renderer.RenderUrlAsPdf(url);
        return pdf.BinaryData;
    }
}
using IronPdf;
public class PdfService : IPdfService
{
    private readonly ChromePdfRenderer _renderer;
    public PdfService()
    {
        _renderer = new ChromePdfRenderer();
        // Configure rendering options for optimal PDF generation in .NET
        _renderer.RenderingOptions.MarginTop = 20;
        _renderer.RenderingOptions.MarginBottom = 20;
        _renderer.RenderingOptions.PrintHtmlBackgrounds = true;
    }
    public byte[] GeneratePdfFromHtml(string htmlContent)
    {
        // Generate PDF from HTML using the .NET PDF API
        var pdf = _renderer.RenderHtmlAsPdf(htmlContent);
        return pdf.BinaryData;
    }
    public byte[] GeneratePdfFromUrl(string url)
    {
        // Convert URL to PDF in the REST API
        var pdf = _renderer.RenderUrlAsPdf(url);
        return pdf.BinaryData;
    }
}
Imports IronPdf

Public Class PdfService
    Implements IPdfService

    Private ReadOnly _renderer As ChromePdfRenderer

    Public Sub New()
        _renderer = New ChromePdfRenderer()
        ' Configure rendering options for optimal PDF generation in .NET
        _renderer.RenderingOptions.MarginTop = 20
        _renderer.RenderingOptions.MarginBottom = 20
        _renderer.RenderingOptions.PrintHtmlBackgrounds = True
    End Sub

    Public Function GeneratePdfFromHtml(htmlContent As String) As Byte()
        ' Generate PDF from HTML using the .NET PDF API
        Dim pdf = _renderer.RenderHtmlAsPdf(htmlContent)
        Return pdf.BinaryData
    End Function

    Public Function GeneratePdfFromUrl(url As String) As Byte()
        ' Convert URL to PDF in the REST API
        Dim pdf = _renderer.RenderUrlAsPdf(url)
        Return pdf.BinaryData
    End Function

End Class
$vbLabelText   $csharpLabel

PdfService处理将HTML转换为PDF的核心过程。 利用IronPDF的ChromePdfRenderer，此类设置了合理的默认值，如页面边距和背景渲染，以生成一个精美的最终文档。

当控制器传递原始HTML时，服务使用IronPDF将其呈现为专业质量的PDF，并将结果返回为字节数据，准备好下载。 此外，它还可以通过将URL直接转换为PDF来处理整个网页。

创建控制器

现在是为我们的API创建控制器的时间了。 这将提供一个可以从HTML生成PDF文件的API端点。 然后，能够下载并将PDF文档保存到您的系统中，以便进一步使用或共享。

// Controllers/PdfController.cs
using Microsoft.AspNetCore.Mvc;
[ApiController]
[Route("api/[controller]")]
public class PdfController : ControllerBase
{
    private readonly IPdfService _pdfService;
    public PdfController(IPdfService pdfService)
    {
        _pdfService = pdfService;
    }
    [HttpPost("html-to-pdf")]
    public IActionResult ConvertHtmlToPdf([FromBody] HtmlRequest request)
    {
        try
        {
            var pdfBytes = _pdfService.GeneratePdfFromHtml(request.HtmlContent);
            // Return as downloadable file
            return File(pdfBytes, "application/pdf", "document.pdf");
        }
        catch (Exception ex)
        {
            return BadRequest($"Error generating PDF: {ex.Message}");
        }
    }
}
// Controllers/PdfController.cs
using Microsoft.AspNetCore.Mvc;
[ApiController]
[Route("api/[controller]")]
public class PdfController : ControllerBase
{
    private readonly IPdfService _pdfService;
    public PdfController(IPdfService pdfService)
    {
        _pdfService = pdfService;
    }
    [HttpPost("html-to-pdf")]
    public IActionResult ConvertHtmlToPdf([FromBody] HtmlRequest request)
    {
        try
        {
            var pdfBytes = _pdfService.GeneratePdfFromHtml(request.HtmlContent);
            // Return as downloadable file
            return File(pdfBytes, "application/pdf", "document.pdf");
        }
        catch (Exception ex)
        {
            return BadRequest($"Error generating PDF: {ex.Message}");
        }
    }
}
Imports Microsoft.AspNetCore.Mvc

<ApiController>
<Route("api/[controller]")>
Public Class PdfController
    Inherits ControllerBase

    Private ReadOnly _pdfService As IPdfService

    Public Sub New(pdfService As IPdfService)
        _pdfService = pdfService
    End Sub

    <HttpPost("html-to-pdf")>
    Public Function ConvertHtmlToPdf(<FromBody> request As HtmlRequest) As IActionResult
        Try
            Dim pdfBytes = _pdfService.GeneratePdfFromHtml(request.HtmlContent)
            ' Return as downloadable file
            Return File(pdfBytes, "application/pdf", "document.pdf")
        Catch ex As Exception
            Return BadRequest($"Error generating PDF: {ex.Message}")
        End Try
    End Function
End Class
$vbLabelText   $csharpLabel

然后，在HtmlRequest.cs文件中，我们将添加：

// Models/HtmlRequest.cs
public class HtmlRequest
{
    public string HtmlContent { get; set; }
    public string FileName { get; set; } = "document.pdf";
}
// Models/HtmlRequest.cs
public class HtmlRequest
{
    public string HtmlContent { get; set; }
    public string FileName { get; set; } = "document.pdf";
}
' Models/HtmlRequest.vb
Public Class HtmlRequest
    Public Property HtmlContent As String
    Public Property FileName As String = "document.pdf"
End Class
$vbLabelText   $csharpLabel

在第一个文件中，我们设置了一个简单的API端点，将HTML转换为可下载的PDF。 当有人通过简单的POST请求将HTML内容发送到api/pdf/html-to-pdf路由时，PdfController将任务传递给专用的服务，将其转换为PDF。

一旦PDF创建完成，控制器将它作为一个准备好下载的文件返回给用户。请求本身是使用HtmlRequest模型结构化的，该模型携带原始HTML和用于最终文档的可选文件名。 简而言之，此设置使得客户端可以轻松发送HTML并立即获得一个精美的PDF作为返回。

注册服务

更新您的Program.cs以注册PDF服务：

var builder = WebApplication.CreateBuilder(args);
builder.Services.AddControllers();
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen();
// Register PDF service
builder.Services.AddSingleton<IPdfService, PdfService>();
var app = builder.Build();
if (app.Environment.IsDevelopment())
{
    app.UseSwagger();
    app.UseSwaggerUI();
}
app.UseHttpsRedirection();
app.MapControllers();
app.Run();
var builder = WebApplication.CreateBuilder(args);
builder.Services.AddControllers();
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen();
// Register PDF service
builder.Services.AddSingleton<IPdfService, PdfService>();
var app = builder.Build();
if (app.Environment.IsDevelopment())
{
    app.UseSwagger();
    app.UseSwaggerUI();
}
app.UseHttpsRedirection();
app.MapControllers();
app.Run();
Imports Microsoft.AspNetCore.Builder
Imports Microsoft.Extensions.DependencyInjection

Dim builder = WebApplication.CreateBuilder(args)
builder.Services.AddControllers()
builder.Services.AddEndpointsApiExplorer()
builder.Services.AddSwaggerGen()
' Register PDF service
builder.Services.AddSingleton(Of IPdfService, PdfService)()
Dim app = builder.Build()
If app.Environment.IsDevelopment() Then
    app.UseSwagger()
    app.UseSwaggerUI()
End If
app.UseHttpsRedirection()
app.MapControllers()
app.Run()
$vbLabelText   $csharpLabel

如何处理不同的响应类型？

您的API应该支持基于客户端需求以不同方式返回PDF：

[HttpPost("generate")]
 public IActionResult GeneratePdf([FromBody] PdfRequest request)
 {
     var pdfBytes = _pdfService.GeneratePdfFromHtml(request.HtmlContent);
     switch (request.ResponseType?.ToLower())
     {
         case "base64":
             return Ok(new
             {
                 data = Convert.ToBase64String(pdfBytes),
                 filename = request.FileName
             });
         case "inline":
             return File(pdfBytes, "application/pdf");
         default: // download
             return File(pdfBytes, "application/pdf", request.FileName);
     }
 }
[HttpPost("generate")]
 public IActionResult GeneratePdf([FromBody] PdfRequest request)
 {
     var pdfBytes = _pdfService.GeneratePdfFromHtml(request.HtmlContent);
     switch (request.ResponseType?.ToLower())
     {
         case "base64":
             return Ok(new
             {
                 data = Convert.ToBase64String(pdfBytes),
                 filename = request.FileName
             });
         case "inline":
             return File(pdfBytes, "application/pdf");
         default: // download
             return File(pdfBytes, "application/pdf", request.FileName);
     }
 }
Imports Microsoft.AspNetCore.Mvc

<HttpPost("generate")>
Public Function GeneratePdf(<FromBody> request As PdfRequest) As IActionResult
    Dim pdfBytes = _pdfService.GeneratePdfFromHtml(request.HtmlContent)
    Select Case request.ResponseType?.ToLower()
        Case "base64"
            Return Ok(New With {
                .data = Convert.ToBase64String(pdfBytes),
                .filename = request.FileName
            })
        Case "inline"
            Return File(pdfBytes, "application/pdf")
        Case Else ' download
            Return File(pdfBytes, "application/pdf", request.FileName)
    End Select
End Function
$vbLabelText   $csharpLabel

在这里，我们在控制器中添加了一个更灵活的PDF生成端点。 而不是总是强制下载文件，GeneratePdf方法让客户端选择他们希望结果如何返回。 此选项提供灵活性，允许PDF以多种格式显示：作为可下载文件，直接在浏览器中，或编码为Base64字符串以便在API中轻松使用。

请求由PdfRequest模型定义，该模型基于之前的HtmlRequest，并添加一个ResponseType选项。 总之，这使用户能够更好地控制如何接收他们的PDF，使API更加多样化和用户友好。

现在，当我们运行程序时，我们将在Swagger上看到此输出。

如何使用IronPDF创建.NET PDF API：图4 - Swagger UI

如何实现常见的PDF操作？

让我们扩展我们的服务以处理各种PDF生成场景：

URL到PDF转换

[HttpPost("url-to-pdf")]
public async Task<IActionResult> ConvertUrlToPdf([FromBody] UrlRequest request)
{
    try
    {
        var pdfBytes = await Task.Run(() => 
            _pdfService.GeneratePdfFromUrl(request.Url));
        return File(pdfBytes, "application/pdf", 
            $"{request.FileName ?? "website"}.pdf");
    }
    catch (Exception ex)
    {
        return BadRequest($"Failed to convert URL: {ex.Message}");
    }
}
public class UrlRequest
{
    public string Url { get; set; }
    public string FileName { get; set; }
}
[HttpPost("url-to-pdf")]
public async Task<IActionResult> ConvertUrlToPdf([FromBody] UrlRequest request)
{
    try
    {
        var pdfBytes = await Task.Run(() => 
            _pdfService.GeneratePdfFromUrl(request.Url));
        return File(pdfBytes, "application/pdf", 
            $"{request.FileName ?? "website"}.pdf");
    }
    catch (Exception ex)
    {
        return BadRequest($"Failed to convert URL: {ex.Message}");
    }
}
public class UrlRequest
{
    public string Url { get; set; }
    public string FileName { get; set; }
}
Imports System.Threading.Tasks
Imports Microsoft.AspNetCore.Mvc

<HttpPost("url-to-pdf")>
Public Async Function ConvertUrlToPdf(<FromBody> request As UrlRequest) As Task(Of IActionResult)
    Try
        Dim pdfBytes = Await Task.Run(Function() _pdfService.GeneratePdfFromUrl(request.Url))
        Return File(pdfBytes, "application/pdf", $"{If(request.FileName, "website")}.pdf")
    Catch ex As Exception
        Return BadRequest($"Failed to convert URL: {ex.Message}")
    End Try
End Function

Public Class UrlRequest
    Public Property Url As String
    Public Property FileName As String
End Class
$vbLabelText   $csharpLabel

此端点允许客户端发送一个URL并获取该网页的可下载PDF。 当POST /api/pdf/url-to-pdf请求到达时，控制器使用_pdfService后台将给定的URL转换为PDF字节，然后以文件下载的形式返回。 如果在转换过程中出现问题，它会优雅地响应一个清晰的错误信息。

让我们尝试使用网址"https://www.apple.com/nz"并测试POST请求。下面是我们获得的输出。

输出

如何使用IronPDF创建.NET PDF API：图5 - URL PDF输出

添加自定义水印

public byte[] AddWatermarkFromFile(string filePath, string watermarkText)
{
    // Load PDF directly from file
    var pdf = PdfDocument.FromFile(filePath);
    pdf.ApplyWatermark(
        $"<h1 style='color:red;font-size:72px;'>{watermarkText}</h1>",
        75,
        IronPdf.Editing.VerticalAlignment.Middle,
        IronPdf.Editing.HorizontalAlignment.Center
    );
    return pdf.BinaryData;
}
public byte[] AddWatermarkFromFile(string filePath, string watermarkText)
{
    // Load PDF directly from file
    var pdf = PdfDocument.FromFile(filePath);
    pdf.ApplyWatermark(
        $"<h1 style='color:red;font-size:72px;'>{watermarkText}</h1>",
        75,
        IronPdf.Editing.VerticalAlignment.Middle,
        IronPdf.Editing.HorizontalAlignment.Center
    );
    return pdf.BinaryData;
}
Imports IronPdf

Public Function AddWatermarkFromFile(filePath As String, watermarkText As String) As Byte()
    ' Load PDF directly from file
    Dim pdf = PdfDocument.FromFile(filePath)
    pdf.ApplyWatermark(
        $"<h1 style='color:red;font-size:72px;'>{watermarkText}</h1>",
        75,
        IronPdf.Editing.VerticalAlignment.Middle,
        IronPdf.Editing.HorizontalAlignment.Center
    )
    Return pdf.BinaryData
End Function
$vbLabelText   $csharpLabel

在这里，我们只是手动加载一个本地的文件以进行测试。 然而，您可以调整这个，以便您的PDF API生成PDF文档，然后轻松地应用自定义水印。

水印输出

如何使用IronPDF创建.NET PDF API：图6 - 上述代码示例中的水印输出

如何使用模板添加动态数据

对于真实世界的应用程序，您通常需要从模板生成带有动态数据的PDFs：

[HttpPost("from-template")]
public IActionResult GenerateFromTemplate([FromBody] TemplateRequest request)
{
    // Simple template replacement
    var html = request.Template;
    foreach (var item in request.Data)
    {
        html = html.Replace($"{{{{{item.Key}}}}}", item.Value);
    }
    var pdfBytes = _pdfService.GeneratePdfFromHtml(html);
    return File(pdfBytes, "application/pdf", request.FileName);
}
public class TemplateRequest
{
    public string Template { get; set; }
    public Dictionary<string, string> Data { get; set; }
    public string FileName { get; set; } = "document.pdf";
}
[HttpPost("from-template")]
public IActionResult GenerateFromTemplate([FromBody] TemplateRequest request)
{
    // Simple template replacement
    var html = request.Template;
    foreach (var item in request.Data)
    {
        html = html.Replace($"{{{{{item.Key}}}}}", item.Value);
    }
    var pdfBytes = _pdfService.GeneratePdfFromHtml(html);
    return File(pdfBytes, "application/pdf", request.FileName);
}
public class TemplateRequest
{
    public string Template { get; set; }
    public Dictionary<string, string> Data { get; set; }
    public string FileName { get; set; } = "document.pdf";
}
Imports Microsoft.AspNetCore.Mvc

<HttpPost("from-template")>
Public Function GenerateFromTemplate(<FromBody> request As TemplateRequest) As IActionResult
    ' Simple template replacement
    Dim html As String = request.Template
    For Each item In request.Data
        html = html.Replace($"{{{{{item.Key}}}}}", item.Value)
    Next
    Dim pdfBytes As Byte() = _pdfService.GeneratePdfFromHtml(html)
    Return File(pdfBytes, "application/pdf", request.FileName)
End Function

Public Class TemplateRequest
    Public Property Template As String
    Public Property Data As Dictionary(Of String, String)
    Public Property FileName As String = "document.pdf"
End Class
$vbLabelText   $csharpLabel

对于更高级的模板场景，请查看IronPDF的HTML到PDF文档。 您还可以探索CSHTML到PDF转换用于MVC应用程序和Razor到PDF用于Blazor应用程序。

如何优化性能？

在构建生产PDF API时，性能至关重要。 以下是关键的优化策略：

异步操作

当构建涉及使用I/O操作的项目时，明智的做法是使用异步编码。 如果您的PDF内容来自外部资源，这尤其有用，例如：

  • 下载HTML页面（RenderUrlAsPdf）
  • 通过HTTP获取图像、CSS或字体
  • 读取/写入磁盘或云存储的文件

这些操作可以阻塞线程，但使用异步可以防止您的API线程空闲等待。

例:

public async Task<byte[]> GeneratePdfFromHtmlAsync(string htmlContent)
{
    return await Task.Run(() => 
    {
        var pdf = _renderer.RenderHtmlAsPdf(htmlContent);
        return pdf.BinaryData;
    });
}
public async Task<byte[]> GeneratePdfFromHtmlAsync(string htmlContent)
{
    return await Task.Run(() => 
    {
        var pdf = _renderer.RenderHtmlAsPdf(htmlContent);
        return pdf.BinaryData;
    });
}
Imports System.Threading.Tasks

Public Async Function GeneratePdfFromHtmlAsync(htmlContent As String) As Task(Of Byte())
    Return Await Task.Run(Function()
                              Dim pdf = _renderer.RenderHtmlAsPdf(htmlContent)
                              Return pdf.BinaryData
                          End Function)
End Function
$vbLabelText   $csharpLabel

渲染选项

配置IronPDF以获得最佳性能：

_renderer.RenderingOptions.EnableJavaScript = false; // If JS not needed
_renderer.RenderingOptions.CssMediaType = PdfCssMediaType.Print;
_renderer.RenderingOptions.RenderDelay = 0; // Remove if no JS
_renderer.RenderingOptions.Timeout = 30; // Set reasonable timeout
_renderer.RenderingOptions.EnableJavaScript = false; // If JS not needed
_renderer.RenderingOptions.CssMediaType = PdfCssMediaType.Print;
_renderer.RenderingOptions.RenderDelay = 0; // Remove if no JS
_renderer.RenderingOptions.Timeout = 30; // Set reasonable timeout
$vbLabelText   $csharpLabel

如何保护您的PDF API？

对于任何生产API，安全性都是至关重要的。 这里是一个简单的API密钥身份验证方法：

// Middleware/ApiKeyMiddleware.cs
public class ApiKeyMiddleware
{
    private readonly RequestDelegate _next;
    private const string ApiKeyHeader = "X-API-Key";
    public ApiKeyMiddleware(RequestDelegate next)
    {
        _next = next;
    }
    public async Task InvokeAsync(HttpContext context)
    {
        if (!context.Request.Headers.TryGetValue(ApiKeyHeader, out var apiKey))
        {
            context.Response.StatusCode = 401;
            await context.Response.WriteAsync("API Key required");
            return;
        }
        // Validate API key (in production, check against database)
        var validApiKey = context.RequestServices
            .GetRequiredService<IConfiguration>()["ApiKey"];
        if (apiKey != validApiKey)
        {
            context.Response.StatusCode = 403;
            await context.Response.WriteAsync("Invalid API Key");
            return;
        }
        await _next(context);
    }
}
// In Program.cs
app.UseMiddleware<ApiKeyMiddleware>();
// Middleware/ApiKeyMiddleware.cs
public class ApiKeyMiddleware
{
    private readonly RequestDelegate _next;
    private const string ApiKeyHeader = "X-API-Key";
    public ApiKeyMiddleware(RequestDelegate next)
    {
        _next = next;
    }
    public async Task InvokeAsync(HttpContext context)
    {
        if (!context.Request.Headers.TryGetValue(ApiKeyHeader, out var apiKey))
        {
            context.Response.StatusCode = 401;
            await context.Response.WriteAsync("API Key required");
            return;
        }
        // Validate API key (in production, check against database)
        var validApiKey = context.RequestServices
            .GetRequiredService<IConfiguration>()["ApiKey"];
        if (apiKey != validApiKey)
        {
            context.Response.StatusCode = 403;
            await context.Response.WriteAsync("Invalid API Key");
            return;
        }
        await _next(context);
    }
}
// In Program.cs
app.UseMiddleware<ApiKeyMiddleware>();
Imports Microsoft.AspNetCore.Http
Imports Microsoft.Extensions.Configuration
Imports System.Threading.Tasks

' Middleware/ApiKeyMiddleware.vb
Public Class ApiKeyMiddleware
    Private ReadOnly _next As RequestDelegate
    Private Const ApiKeyHeader As String = "X-API-Key"

    Public Sub New(next As RequestDelegate)
        _next = next
    End Sub

    Public Async Function InvokeAsync(context As HttpContext) As Task
        Dim apiKey As String = Nothing
        If Not context.Request.Headers.TryGetValue(ApiKeyHeader, apiKey) Then
            context.Response.StatusCode = 401
            Await context.Response.WriteAsync("API Key required")
            Return
        End If

        ' Validate API key (in production, check against database)
        Dim validApiKey As String = context.RequestServices.GetRequiredService(Of IConfiguration)()("ApiKey")
        If apiKey <> validApiKey Then
            context.Response.StatusCode = 403
            Await context.Response.WriteAsync("Invalid API Key")
            Return
        End If

        Await _next(context)
    End Function
End Class

' In Program.vb
app.UseMiddleware(Of ApiKeyMiddleware)()
$vbLabelText   $csharpLabel

对于更高级的身份验证场景，请考虑：

实际案例：发票生成API

让我们构建一个实际的发票生成端点，演示完整的实现。 此示例展示了如何使用生产.NET PDF API生成具有动态数据的专业发票。

立即开始使用 IronPDF。
green arrow pointer

首先，我们将在我们的Models文件夹中创建一个新文件。 在这里，我将其称之为Invoice.cs。 然后，将以下代码添加到您的新文件中。

public class Invoice
{
    public string InvoiceNumber { get; set; }
    public DateTime Date { get; set; }
    public string CustomerName { get; set; }
    public string CustomerAddress { get; set; }
    public List<InvoiceItem> Items { get; set; }
    public decimal Tax { get; set; }
}
public class InvoiceItem
{
    public string Description { get; set; }
    public int Quantity { get; set; }
    public decimal UnitPrice { get; set; }
    public decimal Total => Quantity * UnitPrice;
}
public class Invoice
{
    public string InvoiceNumber { get; set; }
    public DateTime Date { get; set; }
    public string CustomerName { get; set; }
    public string CustomerAddress { get; set; }
    public List<InvoiceItem> Items { get; set; }
    public decimal Tax { get; set; }
}
public class InvoiceItem
{
    public string Description { get; set; }
    public int Quantity { get; set; }
    public decimal UnitPrice { get; set; }
    public decimal Total => Quantity * UnitPrice;
}
Public Class Invoice
    Public Property InvoiceNumber As String
    Public Property [Date] As DateTime
    Public Property CustomerName As String
    Public Property CustomerAddress As String
    Public Property Items As List(Of InvoiceItem)
    Public Property Tax As Decimal
End Class

Public Class InvoiceItem
    Public Property Description As String
    Public Property Quantity As Integer
    Public Property UnitPrice As Decimal
    Public ReadOnly Property Total As Decimal
        Get
            Return Quantity * UnitPrice
        End Get
    End Property
End Class
$vbLabelText   $csharpLabel

然后，我们将需要为我们的发票生成器创建一个新的服务文件。 在您的Services文件夹中，添加以下代码。 对于我的，我创建了一个名为InvoiceService.cs的新文件。 这段代码将处理我们的发票PDF文件的样式和布局。

public class InvoiceService
{
    private readonly ChromePdfRenderer _renderer;
    public InvoiceService()
    {
        _renderer = new ChromePdfRenderer();
        _renderer.RenderingOptions.MarginTop = 10;
        _renderer.RenderingOptions.MarginBottom = 10;
        _renderer.RenderingOptions.PrintHtmlBackgrounds = true;
    }
    public byte[] GenerateInvoice(Invoice invoice)
{
    var html = BuildInvoiceHtml(invoice);
    // Add footer with page numbers
    _renderer.RenderingOptions.HtmlFooter = new HtmlHeaderFooter
    {
        MaxHeight = 15,
        HtmlFragment = "<center><i>{page} of {total-pages}</i></center>",
        DrawDividerLine = true
    };
    var pdf = _renderer.RenderHtmlAsPdf(html);
    return pdf.BinaryData;
}
    private string BuildInvoiceHtml(Invoice invoice)
    {
        var subtotal = invoice.Items.Sum(i => i.Total);
        var taxAmount = subtotal * (invoice.Tax / 100);
        var total = subtotal + taxAmount;
        var itemsHtml = string.Join("", invoice.Items.Select(item => 
            $@"<tr>
                <td>{item.Description}</td>
                <td class='text-center'>{item.Quantity}</td>
                <td class='text-right'>${item.UnitPrice:F2}</td>
                <td class='text-right'>${item.Total:F2}</td>
            </tr>"));
        return $@"
        <!DOCTYPE html>
        <html>
        <head>
            <style>
                body {{ font-family: Arial, sans-serif; }}
                .invoice-header {{ 
                    background-color: #f8f9fa; 
                    padding: 20px; 
                    margin-bottom: 20px; 
                }}
                table {{ 
                    width: 100%; 
                    border-collapse: collapse; 
                }}
                th, td {{ 
                    padding: 10px; 
                    border-bottom: 1px solid #ddd; 
                }}
                th {{ 
                    background-color: #007bff; 
                    color: white; 
                }}
                .text-right {{ text-align: right; }}
                .text-center {{ text-align: center; }}
                .total-section {{ 
                    margin-top: 20px; 
                    text-align: right; 
                }}
            </style>
        </head>
        <body>
            <div class='invoice-header'>
                <h1>Invoice #{invoice.InvoiceNumber}</h1>
                <p>Date: {invoice.Date:yyyy-MM-dd}</p>
            </div>   
            <div>
                <h3>Bill To:</h3>
                <p>{invoice.CustomerName}<br/>{invoice.CustomerAddress}</p>
            </div>    
            <table>
                <thead>
                    <tr>
                        <th>Description</th>
                        <th>Quantity</th>
                        <th>Unit Price</th>
                        <th>Total</th>
                    </tr>
                </thead>
                <tbody>
                    {itemsHtml}
                </tbody>
            </table>
            <div class='total-section'>
                <p>Subtotal: ${subtotal:F2}</p>
                <p>Tax ({invoice.Tax}%): ${taxAmount:F2}</p>
                <h3>Total: ${total:F2}</h3>
            </div>
        </body>
        </html>";
    }
}
public class InvoiceService
{
    private readonly ChromePdfRenderer _renderer;
    public InvoiceService()
    {
        _renderer = new ChromePdfRenderer();
        _renderer.RenderingOptions.MarginTop = 10;
        _renderer.RenderingOptions.MarginBottom = 10;
        _renderer.RenderingOptions.PrintHtmlBackgrounds = true;
    }
    public byte[] GenerateInvoice(Invoice invoice)
{
    var html = BuildInvoiceHtml(invoice);
    // Add footer with page numbers
    _renderer.RenderingOptions.HtmlFooter = new HtmlHeaderFooter
    {
        MaxHeight = 15,
        HtmlFragment = "<center><i>{page} of {total-pages}</i></center>",
        DrawDividerLine = true
    };
    var pdf = _renderer.RenderHtmlAsPdf(html);
    return pdf.BinaryData;
}
    private string BuildInvoiceHtml(Invoice invoice)
    {
        var subtotal = invoice.Items.Sum(i => i.Total);
        var taxAmount = subtotal * (invoice.Tax / 100);
        var total = subtotal + taxAmount;
        var itemsHtml = string.Join("", invoice.Items.Select(item => 
            $@"<tr>
                <td>{item.Description}</td>
                <td class='text-center'>{item.Quantity}</td>
                <td class='text-right'>${item.UnitPrice:F2}</td>
                <td class='text-right'>${item.Total:F2}</td>
            </tr>"));
        return $@"
        <!DOCTYPE html>
        <html>
        <head>
            <style>
                body {{ font-family: Arial, sans-serif; }}
                .invoice-header {{ 
                    background-color: #f8f9fa; 
                    padding: 20px; 
                    margin-bottom: 20px; 
                }}
                table {{ 
                    width: 100%; 
                    border-collapse: collapse; 
                }}
                th, td {{ 
                    padding: 10px; 
                    border-bottom: 1px solid #ddd; 
                }}
                th {{ 
                    background-color: #007bff; 
                    color: white; 
                }}
                .text-right {{ text-align: right; }}
                .text-center {{ text-align: center; }}
                .total-section {{ 
                    margin-top: 20px; 
                    text-align: right; 
                }}
            </style>
        </head>
        <body>
            <div class='invoice-header'>
                <h1>Invoice #{invoice.InvoiceNumber}</h1>
                <p>Date: {invoice.Date:yyyy-MM-dd}</p>
            </div>   
            <div>
                <h3>Bill To:</h3>
                <p>{invoice.CustomerName}<br/>{invoice.CustomerAddress}</p>
            </div>    
            <table>
                <thead>
                    <tr>
                        <th>Description</th>
                        <th>Quantity</th>
                        <th>Unit Price</th>
                        <th>Total</th>
                    </tr>
                </thead>
                <tbody>
                    {itemsHtml}
                </tbody>
            </table>
            <div class='total-section'>
                <p>Subtotal: ${subtotal:F2}</p>
                <p>Tax ({invoice.Tax}%): ${taxAmount:F2}</p>
                <h3>Total: ${total:F2}</h3>
            </div>
        </body>
        </html>";
    }
}
Imports System
Imports System.Linq

Public Class InvoiceService
    Private ReadOnly _renderer As ChromePdfRenderer

    Public Sub New()
        _renderer = New ChromePdfRenderer()
        _renderer.RenderingOptions.MarginTop = 10
        _renderer.RenderingOptions.MarginBottom = 10
        _renderer.RenderingOptions.PrintHtmlBackgrounds = True
    End Sub

    Public Function GenerateInvoice(invoice As Invoice) As Byte()
        Dim html = BuildInvoiceHtml(invoice)
        ' Add footer with page numbers
        _renderer.RenderingOptions.HtmlFooter = New HtmlHeaderFooter With {
            .MaxHeight = 15,
            .HtmlFragment = "<center><i>{page} of {total-pages}</i></center>",
            .DrawDividerLine = True
        }
        Dim pdf = _renderer.RenderHtmlAsPdf(html)
        Return pdf.BinaryData
    End Function

    Private Function BuildInvoiceHtml(invoice As Invoice) As String
        Dim subtotal = invoice.Items.Sum(Function(i) i.Total)
        Dim taxAmount = subtotal * (invoice.Tax / 100)
        Dim total = subtotal + taxAmount
        Dim itemsHtml = String.Join("", invoice.Items.Select(Function(item) 
            $"<tr>
                <td>{item.Description}</td>
                <td class='text-center'>{item.Quantity}</td>
                <td class='text-right'>${item.UnitPrice:F2}</td>
                <td class='text-right'>${item.Total:F2}</td>
            </tr>"))
        Return $"
        <!DOCTYPE html>
        <html>
        <head>
            <style>
                body {{ font-family: Arial, sans-serif; }}
                .invoice-header {{ 
                    background-color: #f8f9fa; 
                    padding: 20px; 
                    margin-bottom: 20px; 
                }}
                table {{ 
                    width: 100%; 
                    border-collapse: collapse; 
                }}
                th, td {{ 
                    padding: 10px; 
                    border-bottom: 1px solid #ddd; 
                }}
                th {{ 
                    background-color: #007bff; 
                    color: white; 
                }}
                .text-right {{ text-align: right; }}
                .text-center {{ text-align: center; }}
                .total-section {{ 
                    margin-top: 20px; 
                    text-align: right; 
                }}
            </style>
        </head>
        <body>
            <div class='invoice-header'>
                <h1>Invoice #{invoice.InvoiceNumber}</h1>
                <p>Date: {invoice.Date:yyyy-MM-dd}</p>
            </div>   
            <div>
                <h3>Bill To:</h3>
                <p>{invoice.CustomerName}<br/>{invoice.CustomerAddress}</p>
            </div>    
            <table>
                <thead>
                    <tr>
                        <th>Description</th>
                        <th>Quantity</th>
                        <th>Unit Price</th>
                        <th>Total</th>
                    </tr>
                </thead>
                <tbody>
                    {itemsHtml}
                </tbody>
            </table>
            <div class='total-section'>
                <p>Subtotal: ${subtotal:F2}</p>
                <p>Tax ({invoice.Tax}%): ${taxAmount:F2}</p>
                <h3>Total: ${total:F2}</h3>
            </div>
        </body>
        </html>"
    End Function
End Class
$vbLabelText   $csharpLabel

最后，您将需要创建一个新的控制器，以便通过API访问并创建一个新的发票。

[ApiController]
[Route("api/[controller]")]
public class InvoiceController : ControllerBase
{
    private readonly InvoiceService _invoiceService;
    public InvoiceController(InvoiceService invoiceService)
    {
        _invoiceService = invoiceService;
    }
    [HttpPost("generate")]
    public IActionResult GenerateInvoice([FromBody] Invoice invoice)
    {
        try
        {
            var pdfBytes = _invoiceService.GenerateInvoice(invoice);
            var fileName = $"Invoice_{invoice.InvoiceNumber}.pdf";
            return File(pdfBytes, "application/pdf", fileName);
        }
        catch (Exception ex)
        {
            return StatusCode(500, $"Error generating invoice: {ex.Message}");
        }
    }
}
[ApiController]
[Route("api/[controller]")]
public class InvoiceController : ControllerBase
{
    private readonly InvoiceService _invoiceService;
    public InvoiceController(InvoiceService invoiceService)
    {
        _invoiceService = invoiceService;
    }
    [HttpPost("generate")]
    public IActionResult GenerateInvoice([FromBody] Invoice invoice)
    {
        try
        {
            var pdfBytes = _invoiceService.GenerateInvoice(invoice);
            var fileName = $"Invoice_{invoice.InvoiceNumber}.pdf";
            return File(pdfBytes, "application/pdf", fileName);
        }
        catch (Exception ex)
        {
            return StatusCode(500, $"Error generating invoice: {ex.Message}");
        }
    }
}
Imports Microsoft.AspNetCore.Mvc

<ApiController>
<Route("api/[controller]")>
Public Class InvoiceController
    Inherits ControllerBase

    Private ReadOnly _invoiceService As InvoiceService

    Public Sub New(invoiceService As InvoiceService)
        _invoiceService = invoiceService
    End Sub

    <HttpPost("generate")>
    Public Function GenerateInvoice(<FromBody> invoice As Invoice) As IActionResult
        Try
            Dim pdfBytes = _invoiceService.GenerateInvoice(invoice)
            Dim fileName = $"Invoice_{invoice.InvoiceNumber}.pdf"
            Return File(pdfBytes, "application/pdf", fileName)
        Catch ex As Exception
            Return StatusCode(500, $"Error generating invoice: {ex.Message}")
        End Try
    End Function
End Class
$vbLabelText   $csharpLabel

发票输出

如何使用IronPDF创建.NET PDF API：图7 - PDF发票输出

容器部署注意事项

虽然本教程侧重于本地开发，但这里是关于将您的PDF API容器化的简要概述：

基础Dockerfile

FROM mcr.microsoft.com/dotnet/aspnet:6.0 AS base
WORKDIR /app
EXPOSE 80
FROM mcr.microsoft.com/dotnet/sdk:6.0 AS build
WORKDIR /src
COPY ["PdfApiService.csproj", "."]
RUN dotnet restore
COPY . .
RUN dotnet build -c Release -o /app/build
FROM build AS publish
RUN dotnet publish -c Release -o /app/publish
FROM base AS final
WORKDIR /app
COPY --from=publish /app/publish .
# IronPDF requires additional dependencies on Linux
RUN apt-get update && apt-get install -y \
    libgdiplus \
    libc6-dev \
    libx11-dev \
    && rm -rf /var/lib/apt/lists/*     
ENTRYPOINT ["dotnet", "PdfApiService.dll"]
FROM mcr.microsoft.com/dotnet/aspnet:6.0 AS base
WORKDIR /app
EXPOSE 80
FROM mcr.microsoft.com/dotnet/sdk:6.0 AS build
WORKDIR /src
COPY ["PdfApiService.csproj", "."]
RUN dotnet restore
COPY . .
RUN dotnet build -c Release -o /app/build
FROM build AS publish
RUN dotnet publish -c Release -o /app/publish
FROM base AS final
WORKDIR /app
COPY --from=publish /app/publish .
# IronPDF requires additional dependencies on Linux
RUN apt-get update && apt-get install -y \
    libgdiplus \
    libc6-dev \
    libx11-dev \
    && rm -rf /var/lib/apt/lists/*     
ENTRYPOINT ["dotnet", "PdfApiService.dll"]
The provided code is a Dockerfile written for building and running a .NET application, not C# code. Dockerfiles are not converted to VB.NET as they are not programming language code but configuration scripts for Docker. If you have C# code that needs conversion to VB.NET, please provide that code instead.
$vbLabelText   $csharpLabel

有关您的.NET PDF API的详细部署指南，请参阅：

错误处理最佳实践

为了设计更具容错性的程序，最佳实践是实施全局错误处理程序，以获得一致的错误响应，例如下面所示：

// Middleware/ErrorHandlingMiddleware.cs
public class ErrorHandlingMiddleware
{
    private readonly RequestDelegate _next;
    public ErrorHandlingMiddleware(RequestDelegate next)
    {
        _next = next;
    }
    public async Task InvokeAsync(HttpContext context)
    {
        try
        {
            await _next(context);
        }
        catch (Exception ex)
        {
            await HandleExceptionAsync(context, ex);
        }
    }
    private static async Task HandleExceptionAsync(HttpContext context, Exception ex)
    {
        context.Response.ContentType = "application/json";
        context.Response.StatusCode = 500;
        var response = new
        {
            error = "An error occurred processing your request",
            message = ex.Message
        };
        await context.Response.WriteAsync(JsonSerializer.Serialize(response));
    }
}
// Middleware/ErrorHandlingMiddleware.cs
public class ErrorHandlingMiddleware
{
    private readonly RequestDelegate _next;
    public ErrorHandlingMiddleware(RequestDelegate next)
    {
        _next = next;
    }
    public async Task InvokeAsync(HttpContext context)
    {
        try
        {
            await _next(context);
        }
        catch (Exception ex)
        {
            await HandleExceptionAsync(context, ex);
        }
    }
    private static async Task HandleExceptionAsync(HttpContext context, Exception ex)
    {
        context.Response.ContentType = "application/json";
        context.Response.StatusCode = 500;
        var response = new
        {
            error = "An error occurred processing your request",
            message = ex.Message
        };
        await context.Response.WriteAsync(JsonSerializer.Serialize(response));
    }
}
Imports System.Text.Json
Imports Microsoft.AspNetCore.Http
Imports System.Threading.Tasks

Public Class ErrorHandlingMiddleware
    Private ReadOnly _next As RequestDelegate

    Public Sub New(next As RequestDelegate)
        _next = next
    End Sub

    Public Async Function InvokeAsync(context As HttpContext) As Task
        Try
            Await _next(context)
        Catch ex As Exception
            Await HandleExceptionAsync(context, ex)
        End Try
    End Function

    Private Shared Async Function HandleExceptionAsync(context As HttpContext, ex As Exception) As Task
        context.Response.ContentType = "application/json"
        context.Response.StatusCode = 500
        Dim response = New With {
            .error = "An error occurred processing your request",
            .message = ex.Message
        }
        Await context.Response.WriteAsync(JsonSerializer.Serialize(response))
    End Function
End Class
$vbLabelText   $csharpLabel

对于特定的IronPDF故障排除场景，请参阅IronPDF故障排除指南。

结论

您现在已经构建了一个强大的.NET PDF API，使用ASP.NET Core和IronPDF可以处理多种文档生成场景。 这个REST API为您的应用程序提供集中化PDF操作的坚实基础。

关键要点：

  • IronPDF使得Web API项目中的PDF生成变得简单，具有其基于Chrome的渲染
  • 您可以轻松调整Web API以编辑现有PDF文档，利用IronPDF的高级编辑工具
  • RESTful设计原则确保您的PDF API直观且易于维护
  • 适当的错误处理和安全措施对于生产至关重要
  • 通过异步操作和缓存进行性能优化可提高可扩展性
  • 您将拥有支持桌面和Web应用程序的可扩展文档解决方案

IronPDF允许开发人员高效地创建PDF文档、保存PDF文件和转换HTML，使其成为现代.NET Framework应用程序中的必备PDF文档API。

下一步

准备好在您的生产.NET PDF API中实施IronPDF了吗？ 以下是您的下一步操作：

  1. 开始免费试用 - 在您的开发环境中测试IronPDF的全部功能
  2. 探索高级功能 - 查看数字签名、PDF表单和其他高级PDF功能
  3. 自信地扩展 - 查看许可选项以满足您的生产API需求

今天就构建您的.NET PDF API，并通过IronPDF在整个应用程序生态系统中简化文档生成！

常见问题解答

什么是.NET PDF API？

一个.NET PDF API是一个库，允许开发人员在.NET应用程序中创建、编辑和提取PDF内容。它简化了复杂的PDF任务并确保PDF文件的有效管理。

一个.NET PDF API如何能够使我的应用程序受益？

一个.NET PDF API可以通过提供一致性、可维护性和可扩展性来增强您的应用程序中PDF文件的管理，如生成发票、报告、证书或合同。

一个.NET PDF API 有哪些常见用例？

一个.NET PDF API 的常见用例包括在桌面和网络应用程序中生成发票、创建报告、制作证书和管理合同。

IronPDF如何简化PDF生成任务？

IronPDF通过提供强大的库简化了PDF生成任务，使得文档内容、PDF页面和表单字段的管理变得简单，更容易维护和扩展应用程序。

IronPDF能够处理PDF表单字段吗？

是的，IronPDF可以高效管理PDF表单字段，允许开发者在PDF文件中创建、填写和提取表单数据。

IronPDF适用于桌面和网络应用程序吗？

当然，IronPDF专为跨桌面和网络应用程序无缝工作而设计，提供一致且可扩展的PDF管理解决方案。

是什么让IronPDF成为.NET开发人员可靠的选择？

IronPDF是.NET开发人员可靠的选择，因为其使用简单、功能全面，并能够简化PDF任务，从而提高生产力和应用程序性能。

IronPDF支持PDF提取功能吗？

是的，IronPDF支持PDF提取功能，允许您有效地从PDF文件中提取文本、图像和其他数据。

IronPDF如何在管理PDF方面提高可扩展性？

IronPDF通过提供一个集中化的PDF生成服务来提高可扩展性，它可以在不牺牲性能的情况下处理日益增长的需求，非常适合增长中的应用程序。

IronPDF为.NET应用程序提供了什么样的支持？

IronPDF为.NET应用程序提供了广泛的支持，包括详细的文档、示例代码和响应迅速的支持团队，协助开发者集成PDF功能。

IronPDF 是否完全兼容 .NET 10？

是的——IronPDF 与 .NET 10 完全兼容。它支持 .NET 10 引入的所有性能、语言和运行时增强功能，并且可以像在 .NET 6、7、8 和 9 等以前的版本中一样，在 .NET 10 项目中开箱即用。

Curtis Chau
Curtis Chau
  立即与工程团队聊天
技术作家

Curtis Chau 拥有卡尔顿大学的计算机科学学士学位，专注于前端开发，精通 Node.js、TypeScript、JavaScript 和 React。他热衷于打造直观且美观的用户界面，喜欢使用现代框架并创建结构良好、视觉吸引力强的手册。

除了开发之外，Curtis 对物联网 (IoT) 有浓厚的兴趣，探索将硬件和软件集成的新方法。在空闲时间，他喜欢玩游戏和构建 Discord 机器人，将他对技术的热爱与创造力相结合。

相关文章

30天试用 → 完整产品。无限制。无卡。 免费试用

钢铁支援团队

我们每周 5 天，每天 24 小时在线。
聊天
电子邮件
打电话给我