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Swashbuckle ASP .NET Core（如何为开发人员工作）

Chipego
奇佩戈-卡琳达
2024年一月27日
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介绍

Swashbuckle 是一个 C# .NET Core NuGet 包，有助于自动记录开发的 RESTful Web API。 在这篇博客中，我们将探讨 Swashbuckle ASP.NET Core 和 IronPDF 安装说明 NuGet 包，这将支持现代 ASP.NET Core Web API 应用程序开发。 这些工具可通过最少的代码实现大量功能。

API 文档页面使用 swagger UI 工具显示，该工具使用从 Web API 项目生成的 swagger.json。 生成的 JSON 文档遵循开放式 API 标准。 Swashbuckle 可以作为 NuGet 包 Swashbuckle.AspNetCore 使用，安装和配置后，会自动暴露 swagger JSON。 swagger UI 工具可读取由写在 API 上的 XML 注释生成的 swagger JSON 文件。此外，还可以通过在项目设置文件中启用 XML 文档文件来创建 XML 文档文件。XML 注释会被转换为 XML 文档文件，并由此生成 swagger JSON。 然后，swagger 中间件读取 JSON 并公开 swagger JSON 端点。

在 .NET Core Web API 项目中实施

让我们从 Web API 项目开始

dotnet new webapi -n SwashbuckleDemo
cd Swashbuckle
dotnet build
dotnet add package --version 6.5.0 Swashbuckle.AspNetCore
dotnet build
dotnet new webapi -n SwashbuckleDemo
cd Swashbuckle
dotnet build
dotnet add package --version 6.5.0 Swashbuckle.AspNetCore
dotnet build
'INSTANT VB TODO TASK: The following line uses invalid syntax:
'dotnet New webapi -n SwashbuckleDemo cd Swashbuckle dotnet build dotnet add package --version 6.5.0 Swashbuckle.AspNetCore dotnet build
$vbLabelText   $csharpLabel

在这里，我们要创建一个 Web API 项目 "SwashbuckleDemo"，然后从软件包管理器控制台为 .NET Core Web API 项目安装 swashbuckle 软件包。

配置 Swagger 中间件

在 Startup.cs 文件中配置 Swagger 服务。

public void ConfigureServices(IServiceCollection services)
{
    // Other service configurations...
    // swagger ui components 
    // Register the Swagger generator
    services.AddSwaggerGen(c =>
    {
        c.SwaggerDoc("v1", new OpenApiInfo { Title = "My API", Version = "v1" });
        // Optionally, include XML comments for additional information
        var xmlFile = $"{Assembly.GetExecutingAssembly().GetName().Name}.xml";
        var xmlPath = Path.Combine(AppContext.BaseDirectory, xmlFile);
        c.IncludeXmlComments(xmlPath);
    });
}
public void Configure(IApplicationBuilder app, IHostingEnvironment env)
{
    // Other app configurations...
    // Enable middleware to serve generated Swagger as a JSON endpoint.
    app.UseSwagger();
    // Enable static file middleware to serve Swagger UI (HTML, JS, CSS, etc.),
    // specifying the Swagger JSON endpoint.
    app.UseSwaggerUI(c =>
    {
        c.SwaggerEndpoint("/swagger/v1/swagger.json", "My API V1");
    });
}
public void ConfigureServices(IServiceCollection services)
{
    // Other service configurations...
    // swagger ui components 
    // Register the Swagger generator
    services.AddSwaggerGen(c =>
    {
        c.SwaggerDoc("v1", new OpenApiInfo { Title = "My API", Version = "v1" });
        // Optionally, include XML comments for additional information
        var xmlFile = $"{Assembly.GetExecutingAssembly().GetName().Name}.xml";
        var xmlPath = Path.Combine(AppContext.BaseDirectory, xmlFile);
        c.IncludeXmlComments(xmlPath);
    });
}
public void Configure(IApplicationBuilder app, IHostingEnvironment env)
{
    // Other app configurations...
    // Enable middleware to serve generated Swagger as a JSON endpoint.
    app.UseSwagger();
    // Enable static file middleware to serve Swagger UI (HTML, JS, CSS, etc.),
    // specifying the Swagger JSON endpoint.
    app.UseSwaggerUI(c =>
    {
        c.SwaggerEndpoint("/swagger/v1/swagger.json", "My API V1");
    });
}
Public Sub ConfigureServices(ByVal services As IServiceCollection)
	' Other service configurations...
	' swagger ui components 
	' Register the Swagger generator
	services.AddSwaggerGen(Sub(c)
		c.SwaggerDoc("v1", New OpenApiInfo With {
			.Title = "My API",
			.Version = "v1"
		})
		' Optionally, include XML comments for additional information
		Dim xmlFile = $"{System.Reflection.Assembly.GetExecutingAssembly().GetName().Name}.xml"
		Dim xmlPath = Path.Combine(AppContext.BaseDirectory, xmlFile)
		c.IncludeXmlComments(xmlPath)
	End Sub)
End Sub
Public Sub Configure(ByVal app As IApplicationBuilder, ByVal env As IHostingEnvironment)
	' Other app configurations...
	' Enable middleware to serve generated Swagger as a JSON endpoint.
	app.UseSwagger()
	' Enable static file middleware to serve Swagger UI (HTML, JS, CSS, etc.),
	' specifying the Swagger JSON endpoint.
	app.UseSwaggerUI(Sub(c)
		c.SwaggerEndpoint("/swagger/v1/swagger.json", "My API V1")
	End Sub)
End Sub
$vbLabelText   $csharpLabel

还为待办事项列表 API 添加了一个控制器

app.MapGet("/", () => "SwashbuckleDemo!");
app.MapGet("/todoitems", async (TodoDb db) =>
    await db.Todos.ToListAsync());
app.MapGet("/todoitems/complete", async (TodoDb db) =>
    await db.Todos.Where(t => t.IsComplete).ToListAsync());
app.MapGet("/todoitems/{id}", async (int id, TodoDb db) =>
    await db.Todos.FindAsync(id)
        is Todo todo
        ? Results.Ok(todo)
        : Results.NotFound());
app.MapPost("/todoitems", async (Todo todo, TodoDb db) =>
{
    db.Todos.Add(todo);
    await db.SaveChangesAsync();
    return Results.Created($"/todoitems/{todo.Id}", todo);
});
app.MapPut("/todoitems/{id}", async (int id, Todo inputTodo, TodoDb db) =>
{
    var todo = await db.Todos.FindAsync(id);
    if (todo is null) return Results.NotFound();
    todo.Name = inputTodo.Name;
    todo.IsComplete = inputTodo.IsComplete;
    await db.SaveChangesAsync();
    return Results.NoContent();
});
app.MapDelete("/todoitems/{id}", async (int id, TodoDb db) =>
{
    if (await db.Todos.FindAsync(id) is Todo todo)
    {
        db.Todos.Remove(todo);
        await db.SaveChangesAsync();
        return Results.Ok(todo);
    }
    return Results.NotFound();
});
app.MapGet("/", () => "SwashbuckleDemo!");
app.MapGet("/todoitems", async (TodoDb db) =>
    await db.Todos.ToListAsync());
app.MapGet("/todoitems/complete", async (TodoDb db) =>
    await db.Todos.Where(t => t.IsComplete).ToListAsync());
app.MapGet("/todoitems/{id}", async (int id, TodoDb db) =>
    await db.Todos.FindAsync(id)
        is Todo todo
        ? Results.Ok(todo)
        : Results.NotFound());
app.MapPost("/todoitems", async (Todo todo, TodoDb db) =>
{
    db.Todos.Add(todo);
    await db.SaveChangesAsync();
    return Results.Created($"/todoitems/{todo.Id}", todo);
});
app.MapPut("/todoitems/{id}", async (int id, Todo inputTodo, TodoDb db) =>
{
    var todo = await db.Todos.FindAsync(id);
    if (todo is null) return Results.NotFound();
    todo.Name = inputTodo.Name;
    todo.IsComplete = inputTodo.IsComplete;
    await db.SaveChangesAsync();
    return Results.NoContent();
});
app.MapDelete("/todoitems/{id}", async (int id, TodoDb db) =>
{
    if (await db.Todos.FindAsync(id) is Todo todo)
    {
        db.Todos.Remove(todo);
        await db.SaveChangesAsync();
        return Results.Ok(todo);
    }
    return Results.NotFound();
});
app.MapGet("/", Function() "SwashbuckleDemo!")
app.MapGet("/todoitems", Async Function(db As TodoDb) Await db.Todos.ToListAsync())
app.MapGet("/todoitems/complete", Async Function(db As TodoDb) Await db.Todos.Where(Function(t) t.IsComplete).ToListAsync())
Dim tempVar As Boolean = TypeOf db.Todos.FindAsync(id) Is Todo
Dim todo As Todo = If(tempVar, CType(db.Todos.FindAsync(id), Todo), Nothing)
app.MapGet("/todoitems/{id}", Async Function(id As Integer, db As TodoDb)If(Await tempVar, Results.Ok(todo), Results.NotFound()))
app.MapPost("/todoitems", Async Function(todo As Todo, db As TodoDb)
	db.Todos.Add(todo)
	Await db.SaveChangesAsync()
	Return Results.Created($"/todoitems/{todo.Id}", todo)
End Function)
app.MapPut("/todoitems/{id}", Async Function(id As Integer, inputTodo As Todo, db As TodoDb)
	Dim todo = Await db.Todos.FindAsync(id)
	If todo Is Nothing Then
		Return Results.NotFound()
	End If
	todo.Name = inputTodo.Name
	todo.IsComplete = inputTodo.IsComplete
	Await db.SaveChangesAsync()
	Return Results.NoContent()
End Function)
app.MapDelete("/todoitems/{id}", Async Function(id As Integer, db As TodoDb)
	Dim tempVar2 As Boolean = TypeOf db.Todos.FindAsync(id) Is Todo
	Dim todo As Todo = If(tempVar2, CType(db.Todos.FindAsync(id), Todo), Nothing)
	If Await tempVar2 Then
		db.Todos.Remove(todo)
		Await db.SaveChangesAsync()
		Return Results.Ok(todo)
	End If
	Return Results.NotFound()
End Function)
$vbLabelText   $csharpLabel

也可以像下面这样添加控制器：

using Microsoft.AspNetCore.Mvc;
namespace RestFullMinimalApi.Controllers;
[ApiController]
[Route("[controller]")]
public class WeatherForecastController : ControllerBase
{
    private static readonly string [] Summaries = new []
    {
        "Freezing", "Bracing", "Chilly", "Cool", "Mild", "Warm", "Balmy", "Hot", "Sweltering", "Scorching"
    };
    private readonly ILogger<WeatherForecastController> _logger;
    public WeatherForecastController(ILogger<WeatherForecastController> logger)
    {
        _logger = logger;
    }
    /// <summary>
    /// Retrieves WeatherForecast
    /// </summary>
    /// <remarks>Awesomeness!</remarks>
    /// <response code="200">Retrieved</response>
    /// <response code="404">Not found</response>
    /// <response code="500">Oops! Can't lookup your request right now</response>
    [HttpGet(Name = "GetWeatherForecast")]
    public IEnumerable<WeatherForecast> Get()
    {
        return Enumerable.Range(1, 5).Select(index => new WeatherForecast
            {
                Date = DateTime.Now.AddDays(index),
                TemperatureC = Random.Shared.Next(-20, 55),
                Summary = Summaries [Random.Shared.Next(Summaries.Length)]
            })
            .ToArray();
    }
}
using Microsoft.AspNetCore.Mvc;
namespace RestFullMinimalApi.Controllers;
[ApiController]
[Route("[controller]")]
public class WeatherForecastController : ControllerBase
{
    private static readonly string [] Summaries = new []
    {
        "Freezing", "Bracing", "Chilly", "Cool", "Mild", "Warm", "Balmy", "Hot", "Sweltering", "Scorching"
    };
    private readonly ILogger<WeatherForecastController> _logger;
    public WeatherForecastController(ILogger<WeatherForecastController> logger)
    {
        _logger = logger;
    }
    /// <summary>
    /// Retrieves WeatherForecast
    /// </summary>
    /// <remarks>Awesomeness!</remarks>
    /// <response code="200">Retrieved</response>
    /// <response code="404">Not found</response>
    /// <response code="500">Oops! Can't lookup your request right now</response>
    [HttpGet(Name = "GetWeatherForecast")]
    public IEnumerable<WeatherForecast> Get()
    {
        return Enumerable.Range(1, 5).Select(index => new WeatherForecast
            {
                Date = DateTime.Now.AddDays(index),
                TemperatureC = Random.Shared.Next(-20, 55),
                Summary = Summaries [Random.Shared.Next(Summaries.Length)]
            })
            .ToArray();
    }
}
Imports Microsoft.AspNetCore.Mvc
Namespace RestFullMinimalApi.Controllers
	<ApiController>
	<Route("[controller]")>
	Public Class WeatherForecastController
		Inherits ControllerBase

		Private Shared ReadOnly Summaries() As String = { "Freezing", "Bracing", "Chilly", "Cool", "Mild", "Warm", "Balmy", "Hot", "Sweltering", "Scorching" }
		Private ReadOnly _logger As ILogger(Of WeatherForecastController)
		Public Sub New(ByVal logger As ILogger(Of WeatherForecastController))
			_logger = logger
		End Sub
		''' <summary>
		''' Retrieves WeatherForecast
		''' </summary>
		''' <remarks>Awesomeness!</remarks>
		''' <response code="200">Retrieved</response>
		''' <response code="404">Not found</response>
		''' <response code="500">Oops! Can't lookup your request right now</response>
		<HttpGet(Name := "GetWeatherForecast")>
		Public Function [Get]() As IEnumerable(Of WeatherForecast)
			Return Enumerable.Range(1, 5).Select(Function(index) New WeatherForecast With {
				.Date = DateTime.Now.AddDays(index),
				.TemperatureC = Random.Shared.Next(-20, 55),
				.Summary = Summaries (Random.Shared.Next(Summaries.Length))
			}).ToArray()
		End Function
	End Class
End Namespace
$vbLabelText   $csharpLabel

上述代码可以在GitHub - Swashbuckle Demo找到。

Swashbuckle 提供以下功能

Swagger UI 工具

Swashbuckle ASP .NET Core（开发者如何使用）：图 1 - Swagger UI 工具

Swagger UI 可从 Web API 应用程序的基本 URL 中的"/swagger/index.html "获取。 它列出了代码中的所有 REST API。 swagger 生成器读取 JSON 文件并填充用户界面。

Swagger JSON

Swashbuckle.AspNetCore 可自动生成 Swagger JSON 文件，其中包含有关 API 结构的信息，包括端点、请求和响应类型等详细信息。 该 JSON 文件可用于支持 Swagger/OpenAPI 标准的其他工具和服务。

swagger JSON 文件可从 Web API 应用程序的基本 URL"/swagger/v1/swagger.json "中获取。

Swashbuckle ASP .NET Core（开发人员如何使用）：图2 - swagger JSON 文件。

代码注释

开发者可以在其ASP.NET Core 控制器中使用 XML 注释和属性，为 Swagger 文档提供附加信息。 这包括描述、示例和其他元数据，以增强生成的 Swagger 文档。

[ApiController]
[Route("[controller]")]
public class WeatherForecastController : ControllerBase
{
    private static readonly string [] Summaries = new []
    {
        "Freezing", "Bracing", "Chilly", "Cool", "Mild", "Warm", "Balmy", "Hot", "Sweltering", "Scorching"
    };
    private readonly ILogger<WeatherForecastController> _logger;
    public WeatherForecastController(ILogger<WeatherForecastController> logger)
    {
        _logger = logger;
    }
    /// <summary>
    /// Retrieves WeatherForecast
    /// </summary>
    /// <remarks>Awesomeness!</remarks>
    /// <response code="200">Retrieved</response>
    /// <response code="404">Not found</response>
    /// <response code="500">Oops! Can't lookup your request right now</response>
    [HttpGet(Name = "GetWeatherForecast")]
    public IEnumerable<WeatherForecast> Get()
    {
        return Enumerable.Range(1, 5).Select(index => new WeatherForecast
            {
                Date = DateTime.Now.AddDays(index),
                TemperatureC = Random.Shared.Next(-20, 55),
                Summary = Summaries [Random.Shared.Next(Summaries.Length)]
            })
            .ToArray();
    }
}
[ApiController]
[Route("[controller]")]
public class WeatherForecastController : ControllerBase
{
    private static readonly string [] Summaries = new []
    {
        "Freezing", "Bracing", "Chilly", "Cool", "Mild", "Warm", "Balmy", "Hot", "Sweltering", "Scorching"
    };
    private readonly ILogger<WeatherForecastController> _logger;
    public WeatherForecastController(ILogger<WeatherForecastController> logger)
    {
        _logger = logger;
    }
    /// <summary>
    /// Retrieves WeatherForecast
    /// </summary>
    /// <remarks>Awesomeness!</remarks>
    /// <response code="200">Retrieved</response>
    /// <response code="404">Not found</response>
    /// <response code="500">Oops! Can't lookup your request right now</response>
    [HttpGet(Name = "GetWeatherForecast")]
    public IEnumerable<WeatherForecast> Get()
    {
        return Enumerable.Range(1, 5).Select(index => new WeatherForecast
            {
                Date = DateTime.Now.AddDays(index),
                TemperatureC = Random.Shared.Next(-20, 55),
                Summary = Summaries [Random.Shared.Next(Summaries.Length)]
            })
            .ToArray();
    }
}
<ApiController>
<Route("[controller]")>
Public Class WeatherForecastController
	Inherits ControllerBase

	Private Shared ReadOnly Summaries() As String = { "Freezing", "Bracing", "Chilly", "Cool", "Mild", "Warm", "Balmy", "Hot", "Sweltering", "Scorching" }
	Private ReadOnly _logger As ILogger(Of WeatherForecastController)
	Public Sub New(ByVal logger As ILogger(Of WeatherForecastController))
		_logger = logger
	End Sub
	''' <summary>
	''' Retrieves WeatherForecast
	''' </summary>
	''' <remarks>Awesomeness!</remarks>
	''' <response code="200">Retrieved</response>
	''' <response code="404">Not found</response>
	''' <response code="500">Oops! Can't lookup your request right now</response>
	<HttpGet(Name := "GetWeatherForecast")>
	Public Function [Get]() As IEnumerable(Of WeatherForecast)
		Return Enumerable.Range(1, 5).Select(Function(index) New WeatherForecast With {
			.Date = DateTime.Now.AddDays(index),
			.TemperatureC = Random.Shared.Next(-20, 55),
			.Summary = Summaries (Random.Shared.Next(Summaries.Length))
		}).ToArray()
	End Function
End Class
$vbLabelText   $csharpLabel

配置选项

Swashbuckle.AspNetCore 提供各种配置选项，可自定义 Swagger 文档的生成方式。 开发人员可以控制记录哪些 API、配置命名约定并调整其他设置。

以下是 Swashbuckle.AspNetCore 提供的一些关键配置选项：

SwaggerGen 选项

c.SwaggerDoc("v1", new OpenApiInfo { Title = "My API", Version = "v1" });
c.SwaggerDoc("v1", new OpenApiInfo { Title = "My API", Version = "v1" });
c.SwaggerDoc("v1", New OpenApiInfo With {
	.Title = "My API",
	.Version = "v1"
})
$vbLabelText   $csharpLabel

此行指定 Swagger 文档版本，并包含 API 的标题和版本等元数据。

c.IncludeXmlComments(xmlPath);
c.IncludeXmlComments(xmlPath);
c.IncludeXmlComments(xmlPath)
$vbLabelText   $csharpLabel

该选项允许您在代码中加入 XML 注释，以便在 Swagger 文档中提供更多信息。 xmlPath 变量应指向 XML 注释文件的位置。

c.DescribeAllParametersInCamelCase();
c.DescribeAllParametersInCamelCase();
c.DescribeAllParametersInCamelCase()
$vbLabelText   $csharpLabel

该选项可将 Swagger 生成器配置为对参数名称使用 camelCase。

c.OperationFilter<CustomOperationFilter>();
c.OperationFilter<CustomOperationFilter>();
c.OperationFilter(Of CustomOperationFilter)()
$vbLabelText   $csharpLabel

您可以注册自定义操作过滤器来修改特定操作的 Swagger 文档。 CustomOperationFilter 是一个实现 IOperationFilter 的类。

Swagger UI 选项

c.SwaggerEndpoint("/swagger/v1/swagger.json", "My API V1");
c.SwaggerEndpoint("/swagger/v1/swagger.json", "My API V1");
c.SwaggerEndpoint("/swagger/v1/swagger.json", "My API V1")
$vbLabelText   $csharpLabel

该行配置 Swagger UI 以显示文档。 第一个参数是 Swagger JSON 文件的 URL，第二个参数是用户友好的 API 版本名称。

c.RoutePrefix = "swagger";
c.RoutePrefix = "swagger";
c.RoutePrefix = "swagger"
$vbLabelText   $csharpLabel

您可以为 Swagger UI 设置路由前缀。 在本例中，Swagger UI 将在 /swagger 中提供。

c.DocExpansion(DocExpansion.None);
c.DocExpansion(DocExpansion.None);
c.DocExpansion(DocExpansion.None)
$vbLabelText   $csharpLabel

该选项控制 Swagger UI 如何显示 API 文档。 DocExpansion.None 默认折叠所有操作。

SwaggerOptions

c.SerializeAsV2 = true;
c.SerializeAsV2 = true;
c.SerializeAsV2 = True
$vbLabelText   $csharpLabel

此选项指定是否以2.0格式（true）或3.0格式（false）序列化Swagger文档。 如果要使用 Swagger 2.0，请将其设置为 true。

c.DisplayOperationId();
c.DisplayOperationId();
c.DisplayOperationId()
$vbLabelText   $csharpLabel

该选项可在 Swagger UI 中显示操作 ID，这对于调试和了解 API 结构非常有用。

c.OAuthClientId("swagger-ui");
c.OAuthClientId("swagger-ui");
c.OAuthClientId("swagger-ui")
$vbLabelText   $csharpLabel

如果您的 API 使用 OAuth 身份验证，您可以为 Swagger UI 配置 OAuth 客户端 ID。

这些只是可用配置选项的几个示例。 Swashbuckle.AspNetCore 库具有高度可定制性，您可以通过组合各种选项和过滤器来定制 Swagger 文档，以满足您的特定需求。 请务必参考官方文档或开发环境中的 IntelliSense，以获取有关可用选项的最新、最全面的信息。

介绍IronPDF

IronPDF 产品概览 是来自 Iron Software 网站 的 C# PDF 库，帮助读取和生成 PDF 文档。 它可以轻松地将带有样式信息的格式化文档转换为 PDF。 IronPDF 可以轻松地从 HTML 内容生成 PDF。 它可以从 URL 下载 HTML 内容，然后生成 PDF。

IronPDF 是将网页、URL 和HTML 转换为 PDF 的绝佳工具，完美复制源内容。 它是生成在线内容（如报告和发票）PDF的理想工具，并且能够轻松创建任何网页的PDF版本。

using IronPdf;

class Program
{
    static void Main(string[] args)
    {
        var renderer = new ChromePdfRenderer();

        // 1. Convert HTML String to PDF
        var htmlContent = "<h1>Hello, IronPDF!</h1><p>This is a PDF from an HTML string.</p>";
        var pdfFromHtmlString = renderer.RenderHtmlAsPdf(htmlContent);
        pdfFromHtmlString.SaveAs("HTMLStringToPDF.pdf");

        // 2. Convert HTML File to PDF
        var htmlFilePath = "path_to_your_html_file.html"; // Specify the path to your HTML file
        var pdfFromHtmlFile = renderer.RenderHtmlFileAsPdf(htmlFilePath);
        pdfFromHtmlFile.SaveAs("HTMLFileToPDF.pdf");

        // 3. Convert URL to PDF
        var url = "http://ironpdf.com"; // Specify the URL
        var pdfFromUrl = renderer.RenderUrlAsPdf(url);
        pdfFromUrl.SaveAs("URLToPDF.pdf");
    }
}
using IronPdf;

class Program
{
    static void Main(string[] args)
    {
        var renderer = new ChromePdfRenderer();

        // 1. Convert HTML String to PDF
        var htmlContent = "<h1>Hello, IronPDF!</h1><p>This is a PDF from an HTML string.</p>";
        var pdfFromHtmlString = renderer.RenderHtmlAsPdf(htmlContent);
        pdfFromHtmlString.SaveAs("HTMLStringToPDF.pdf");

        // 2. Convert HTML File to PDF
        var htmlFilePath = "path_to_your_html_file.html"; // Specify the path to your HTML file
        var pdfFromHtmlFile = renderer.RenderHtmlFileAsPdf(htmlFilePath);
        pdfFromHtmlFile.SaveAs("HTMLFileToPDF.pdf");

        // 3. Convert URL to PDF
        var url = "http://ironpdf.com"; // Specify the URL
        var pdfFromUrl = renderer.RenderUrlAsPdf(url);
        pdfFromUrl.SaveAs("URLToPDF.pdf");
    }
}
Imports IronPdf

Friend Class Program
	Shared Sub Main(ByVal args() As String)
		Dim renderer = New ChromePdfRenderer()

		' 1. Convert HTML String to PDF
		Dim htmlContent = "<h1>Hello, IronPDF!</h1><p>This is a PDF from an HTML string.</p>"
		Dim pdfFromHtmlString = renderer.RenderHtmlAsPdf(htmlContent)
		pdfFromHtmlString.SaveAs("HTMLStringToPDF.pdf")

		' 2. Convert HTML File to PDF
		Dim htmlFilePath = "path_to_your_html_file.html" ' Specify the path to your HTML file
		Dim pdfFromHtmlFile = renderer.RenderHtmlFileAsPdf(htmlFilePath)
		pdfFromHtmlFile.SaveAs("HTMLFileToPDF.pdf")

		' 3. Convert URL to PDF
		Dim url = "http://ironpdf.com" ' Specify the URL
		Dim pdfFromUrl = renderer.RenderUrlAsPdf(url)
		pdfFromUrl.SaveAs("URLToPDF.pdf")
	End Sub
End Class
$vbLabelText   $csharpLabel

安装

通过 NuGet 安装 IronPDF 可以使用 NuGet 包管理器详情 或使用 Visual Studio 安装指南 包管理器控制台进行安装。

在软件包管理器控制台中，输入命令：

Install-Package IronPdf

使用 Visual Studio

![Swashbuckle ASP .NET Core（它如何为开发人员工作）：图 3 - 在 Visual Studio 中打开您的项目。 转到 "工具"菜单，选择 "NuGet软件包管理器"，然后选择 "管理解决方案的 NuGet 软件包"。 在 NuGet 软件包管理器界面，在浏览选项卡中搜索软件包 "ironPdf"。 然后选择并安装最新版本的IronPDF。

现在，让我们修改应用程序，添加将网站内容下载为 PDF 文件的功能。

using Microsoft.AspNetCore.Mvc;
namespace RestFullMinimalApi.Controllers;
[ApiController]
[Route("[controller]")]
public class WeatherForecastController : ControllerBase
{
    private static readonly string [] Summaries = new []
    {
        "Freezing", "Bracing", "Chilly", "Cool", "Mild", "Warm", "Balmy", "Hot", "Sweltering", "Scorching"
    };
    private readonly ILogger<WeatherForecastController> _logger;
    public WeatherForecastController(ILogger<WeatherForecastController> logger)
    {
        _logger = logger;
    }
    /// <summary>
    /// Retrieves WeatherForecast
    /// </summary>
    /// <remarks>Awesomeness!</remarks>
    /// <response code="200">Retrieved</response>
    /// <response code="404">Not found</response>
    /// <response code="500">Oops! Can't lookup your request right now</response>
    [HttpGet(Name = "GetWeatherForecast")]
    public IEnumerable<WeatherForecast> Get()
    {
        return Enumerable.Range(1, 5).Select(index => new WeatherForecast
            {
                Date = DateTime.Now.AddDays(index),
                TemperatureC = Random.Shared.Next(-20, 55),
                Summary = Summaries [Random.Shared.Next(Summaries.Length)]
            })
            .ToArray();
    }
    /// <summary>
    /// Retrieves WeatherForecast as Pdf
    /// </summary>
    /// <remarks>Awesomeness!</remarks>
    /// <response code="200">Retrieved</response>
    /// <response code="404">Not found</response>
    /// <response code="500">Oops! Can't lookup your request right now</response>
    [HttpGet("download", Name = "DownloadWeatherForecast")]
    public IActionResult GetWeatherExcel()
    {
        var results = Enumerable.Range(1, 5).Select(index => new WeatherForecast
        {
            Date = DateTime.Now.AddDays(index),
            TemperatureC = Random.Shared.Next(-20, 55),
            Summary = Summaries [Random.Shared.Next(Summaries.Length)]
        }).ToArray();
        var html = GetHtml(results);
        var Renderer = new ChromePdfRenderer();
        var PDF = Renderer.RenderHtmlAsPdf(html);
        var fileName = "WeatherReport.pdf";
        PDF.SaveAs(fileName);
        var stream = new FileStream(fileName, FileMode.Open);
        // Save the excel file
        return new FileStreamResult(stream, "application/octet-stream") { FileDownloadName = fileName };
    }
    private static string GetHtml(WeatherForecast [] weatherForecasts)
    {
        string header = $@"
<html>
<head><title>WeatherForecast</title></head>
<body>
<h1>WeatherForecast</h1>
    ";
        var footer = @"
</body>
</html>";
        var htmlContent = header;
        foreach (var weather in weatherForecasts)
        {
            htmlContent += $@"
    <h2>{weather.Date}</h2>
    <p>Summary: {weather.Summary}</p>
    <p>Temperature in Celcius: {weather.TemperatureC}</p>
    <p>Temperature in Farenheit: {weather.TemperatureF}</p>
";
        }
        htmlContent += footer;
        return htmlContent;
    }
}
using Microsoft.AspNetCore.Mvc;
namespace RestFullMinimalApi.Controllers;
[ApiController]
[Route("[controller]")]
public class WeatherForecastController : ControllerBase
{
    private static readonly string [] Summaries = new []
    {
        "Freezing", "Bracing", "Chilly", "Cool", "Mild", "Warm", "Balmy", "Hot", "Sweltering", "Scorching"
    };
    private readonly ILogger<WeatherForecastController> _logger;
    public WeatherForecastController(ILogger<WeatherForecastController> logger)
    {
        _logger = logger;
    }
    /// <summary>
    /// Retrieves WeatherForecast
    /// </summary>
    /// <remarks>Awesomeness!</remarks>
    /// <response code="200">Retrieved</response>
    /// <response code="404">Not found</response>
    /// <response code="500">Oops! Can't lookup your request right now</response>
    [HttpGet(Name = "GetWeatherForecast")]
    public IEnumerable<WeatherForecast> Get()
    {
        return Enumerable.Range(1, 5).Select(index => new WeatherForecast
            {
                Date = DateTime.Now.AddDays(index),
                TemperatureC = Random.Shared.Next(-20, 55),
                Summary = Summaries [Random.Shared.Next(Summaries.Length)]
            })
            .ToArray();
    }
    /// <summary>
    /// Retrieves WeatherForecast as Pdf
    /// </summary>
    /// <remarks>Awesomeness!</remarks>
    /// <response code="200">Retrieved</response>
    /// <response code="404">Not found</response>
    /// <response code="500">Oops! Can't lookup your request right now</response>
    [HttpGet("download", Name = "DownloadWeatherForecast")]
    public IActionResult GetWeatherExcel()
    {
        var results = Enumerable.Range(1, 5).Select(index => new WeatherForecast
        {
            Date = DateTime.Now.AddDays(index),
            TemperatureC = Random.Shared.Next(-20, 55),
            Summary = Summaries [Random.Shared.Next(Summaries.Length)]
        }).ToArray();
        var html = GetHtml(results);
        var Renderer = new ChromePdfRenderer();
        var PDF = Renderer.RenderHtmlAsPdf(html);
        var fileName = "WeatherReport.pdf";
        PDF.SaveAs(fileName);
        var stream = new FileStream(fileName, FileMode.Open);
        // Save the excel file
        return new FileStreamResult(stream, "application/octet-stream") { FileDownloadName = fileName };
    }
    private static string GetHtml(WeatherForecast [] weatherForecasts)
    {
        string header = $@"
<html>
<head><title>WeatherForecast</title></head>
<body>
<h1>WeatherForecast</h1>
    ";
        var footer = @"
</body>
</html>";
        var htmlContent = header;
        foreach (var weather in weatherForecasts)
        {
            htmlContent += $@"
    <h2>{weather.Date}</h2>
    <p>Summary: {weather.Summary}</p>
    <p>Temperature in Celcius: {weather.TemperatureC}</p>
    <p>Temperature in Farenheit: {weather.TemperatureF}</p>
";
        }
        htmlContent += footer;
        return htmlContent;
    }
}
Imports Microsoft.AspNetCore.Mvc
Namespace RestFullMinimalApi.Controllers
	<ApiController>
	<Route("[controller]")>
	Public Class WeatherForecastController
		Inherits ControllerBase

		Private Shared ReadOnly Summaries() As String = { "Freezing", "Bracing", "Chilly", "Cool", "Mild", "Warm", "Balmy", "Hot", "Sweltering", "Scorching" }
		Private ReadOnly _logger As ILogger(Of WeatherForecastController)
		Public Sub New(ByVal logger As ILogger(Of WeatherForecastController))
			_logger = logger
		End Sub
		''' <summary>
		''' Retrieves WeatherForecast
		''' </summary>
		''' <remarks>Awesomeness!</remarks>
		''' <response code="200">Retrieved</response>
		''' <response code="404">Not found</response>
		''' <response code="500">Oops! Can't lookup your request right now</response>
		<HttpGet(Name := "GetWeatherForecast")>
		Public Function [Get]() As IEnumerable(Of WeatherForecast)
			Return Enumerable.Range(1, 5).Select(Function(index) New WeatherForecast With {
				.Date = DateTime.Now.AddDays(index),
				.TemperatureC = Random.Shared.Next(-20, 55),
				.Summary = Summaries (Random.Shared.Next(Summaries.Length))
			}).ToArray()
		End Function
		''' <summary>
		''' Retrieves WeatherForecast as Pdf
		''' </summary>
		''' <remarks>Awesomeness!</remarks>
		''' <response code="200">Retrieved</response>
		''' <response code="404">Not found</response>
		''' <response code="500">Oops! Can't lookup your request right now</response>
		<HttpGet("download", Name := "DownloadWeatherForecast")>
		Public Function GetWeatherExcel() As IActionResult
			Dim results = Enumerable.Range(1, 5).Select(Function(index) New WeatherForecast With {
				.Date = DateTime.Now.AddDays(index),
				.TemperatureC = Random.Shared.Next(-20, 55),
				.Summary = Summaries (Random.Shared.Next(Summaries.Length))
			}).ToArray()
			Dim html = GetHtml(results)
			Dim Renderer = New ChromePdfRenderer()
			Dim PDF = Renderer.RenderHtmlAsPdf(html)
			Dim fileName = "WeatherReport.pdf"
			PDF.SaveAs(fileName)
			Dim stream = New FileStream(fileName, FileMode.Open)
			' Save the excel file
			Return New FileStreamResult(stream, "application/octet-stream") With {.FileDownloadName = fileName}
		End Function
		Private Shared Function GetHtml(ByVal weatherForecasts() As WeatherForecast) As String
			Dim header As String = $"
<html>
<head><title>WeatherForecast</title></head>
<body>
<h1>WeatherForecast</h1>
    "
	ignore ignore ignore ignore ignore var footer = "
</body>
</html>"
	ignore ignore var htmlContent = header
			For Each weather In weatherForecasts
				htmlContent += $"
    <h2>{weather.Date}</h2>
    <p>Summary: {weather.Summary}</p>
    <p>Temperature in Celcius: {weather.TemperatureC}</p>
    <p>Temperature in Farenheit: {weather.TemperatureF}</p>
"
	ignore ignore ignore ignore ignore
			Next weather
			htmlContent += footer
			Return htmlContent
		End Function
	End Class
End Namespace
$vbLabelText   $csharpLabel

在这里，我们使用天气数据生成 HTML 字符串，然后使用该字符串生成 PDF 文档。

HTML 内容

Swashbuckle ASP .NET Core（它如何为开发人员工作）：图 4 - 天气预报的 HTML 内容。

PDF 报告看起来是这样的

Swashbuckle ASP .NET Core（开发人员如何使用）：图5 - HTML 到 PDF 输出文件：WeatherReport.pdf

完整代码可以在GitHub上找到 - Swashbuckle Demo Source Code。

文件上有试用许可证的小水印，可使用有效许可证去除。

许可（可免费试用）

要使上述代码生效，需要许可证密钥。 此密钥需要放在 appsettings.json 文件中。

"IronPdf.LicenseKey": "your license key"
"IronPdf.LicenseKey": "your license key"
'INSTANT VB TODO TASK: The following line uses invalid syntax:
'"IronPdf.LicenseKey": "your license key"
$vbLabelText   $csharpLabel

开发人员可在IronPDF 试用注册后获得试用许可证。 试用许可证无需信用卡。 您可以提供电子邮件地址并注册免费试用。

结论

通过了解 Swashbuckle 和 IronPDF，您可以在 ASP.NET Core 应用程序中有效集成 API 文档和 PDF 生成功能。 IronPDF 还提供了全面的入门文档，以及各种用于 PDF 生成的代码示例。

此外，您还可以探索来自Iron Software的相关软件产品，这些产品将帮助您提高编码技能并实现现代应用程序需求。

Chipego
奇佩戈-卡琳达
  立即与工程团队聊天
软件工程师
Chipego 拥有出色的倾听技巧，这帮助他理解客户问题并提供智能解决方案。他在 2023 年加入 Iron Software 团队，此前他获得了信息技术学士学位。IronPDF 和 IronOCR 是 Chipego 主要专注的两个产品，但他对所有产品的了解每天都在增长，因为他不断找到支持客户的新方法。他喜欢 Iron Software 的合作氛围，公司各地的团队成员贡献他们丰富的经验，以提供有效的创新解决方案。当 Chipego 离开办公桌时，你经常可以发现他在看书或踢足球。
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