Datatables .NET（開發者的工作原理）

public class Product
{
    public int Id { get; set; }
    public string ProductName { get; set; } = string.Empty;
    public string ProductPrice { get; set; } = string.Empty;
    public string ProductWeight { get; set; } = string.Empty;
    public string ProductDescription { get; set; } = string.Empty;
    public DateTime ProductManufacturingDate { get; set; }
    public DateTime ProductExpiryDate { get; set; }
}

Public Class Product
	Public Property Id() As Integer
	Public Property ProductName() As String = String.Empty
	Public Property ProductPrice() As String = String.Empty
	Public Property ProductWeight() As String = String.Empty
	Public Property ProductDescription() As String = String.Empty
	Public Property ProductManufacturingDate() As DateTime
	Public Property ProductExpiryDate() As DateTime
End Class

public class ApplicationDBContext : DbContext
{
    public ApplicationDBContext(DbContextOptions<ApplicationDBContext> options) : base(options)
    {
    }
    public DbSet<Product> Products { get; set; }
}

Public Class ApplicationDBContext
	Inherits DbContext

	Public Sub New(ByVal options As DbContextOptions(Of ApplicationDBContext))
		MyBase.New(options)
	End Sub
	Public Property Products() As DbSet(Of Product)
End Class

// Initialize the DataTables plugin for the HTML element with 'productDatatable' ID
$(document).ready(function () {
    $("#productDatatable").DataTable({
        "processing": true, // Enable processing indicator
        "serverSide": true, // Enable server-side processing
        "ajax": {
            "url": "/api/Product", // API endpoint for fetching product data
            "type": "POST",
            "datatype": "json"
        },
        "columnDefs": [{
            // Define properties for columns
            "targets": [0],
            "visible": false, // Hide the 'Id' column
            "searchable": false // Disable searching for the 'Id' column
        }],
        "columns": [
            { "data": "id", "name": "Id", "autoWidth": true },
            { "data": "productName", "name": "ProductName", "autoWidth": true },
            { "data": "productPrice", "name": "ProductPrice", "autoWidth": true },
            { "data": "productWeight", "name": "ProductWeight", "autoWidth": true },
            { "data": "productDescription", "name": "ProductDescription", "autoWidth": true },
            { "data": "productManufacturingDate", "name": "ProductManufacturingDate", "autoWidth": true },
            { "data": "productExpiryDate", "name": "ProductExpiryDate", "autoWidth": true },
            {
                // Add a 'Delete' button with an onclick event for deleting the product
                "render": function (data, type, row) { 
                    return "<a href='#' class='btn btn-danger' onclick=DeleteProduct('" + row.id + "');>Delete</a>"; 
                }
            }
        ]
    });
});

[Route("api/[controller]")]
[ApiController]
public class ProductController : ControllerBase
{
    private readonly ApplicationDBContext context;
    public ProductController(ApplicationDBContext context)
    {
        this.context = context;
    }

    [HttpPost]
    public IActionResult GetProducts()
    {
        try
        {
            var draw = Request.Form["draw"].FirstOrDefault();
            var start = Request.Form["start"].FirstOrDefault();
            var length = Request.Form["length"].FirstOrDefault();
            var searchValue = Request.Form["search[value]"].FirstOrDefault();
            int pageSize = length != null ? Convert.ToInt32(length) : 0;
            int skip = start != null ? Convert.ToInt32(start) : 0;
            int recordsTotal = 0;
            var productData = context.Products.ToLis();

            // Filtering data based on provided search value
            if (!string.IsNullOrEmpty(searchValue))
            {
                productData = productData.Where(m => m.ProductName.Contains(searchValue)
                                            || m.ProductDescription.Contains(searchValue)
                                            || m.Id.ToString().Contains(searchValue)).ToList();
            }

            recordsTotal = productData.Count();
            var data = productData.Skip(skip).Take(pageSize).ToList();
            var jsonData = new { draw = draw, recordsFiltered = recordsTotal, recordsTotal = recordsTotal, data = data };
            return Ok(jsonData);
        }
        catch (Exception)
        {
            throw;
        }
    }
}

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

	Private ReadOnly context As ApplicationDBContext
	Public Sub New(ByVal context As ApplicationDBContext)
		Me.context = context
	End Sub

	<HttpPost>
	Public Function GetProducts() As IActionResult
		Try
			Dim draw = Request.Form("draw").FirstOrDefault()
			Dim start = Request.Form("start").FirstOrDefault()
			Dim length = Request.Form("length").FirstOrDefault()
			Dim searchValue = Request.Form("search[value]").FirstOrDefault()
			Dim pageSize As Integer = If(length IsNot Nothing, Convert.ToInt32(length), 0)
			Dim skip As Integer = If(start IsNot Nothing, Convert.ToInt32(start), 0)
			Dim recordsTotal As Integer = 0
			Dim productData = context.Products.ToLis()

			' Filtering data based on provided search value
			If Not String.IsNullOrEmpty(searchValue) Then
				productData = productData.Where(Function(m) m.ProductName.Contains(searchValue) OrElse m.ProductDescription.Contains(searchValue) OrElse m.Id.ToString().Contains(searchValue)).ToList()
			End If

			recordsTotal = productData.Count()
			Dim data = productData.Skip(skip).Take(pageSize).ToList()
			Dim jsonData = New With {
				Key .draw = draw,
				Key .recordsFiltered = recordsTotal,
				Key .recordsTotal = recordsTotal,
				Key .data = data
			}
			Return Ok(jsonData)
		Catch e1 As Exception
			Throw
		End Try
	End Function
End Class

public static void Main(string[] args)
{
    var builder = WebApplication.CreateBuilder(args);
    builder.Services.AddDbContext<ApplicationDBContext>(options =>
    {
         options.UseSqlServer(builder.Configuration.GetConnectionString("ProductDB"));
    });
    builder.Services.AddControllers();
    // Add services to the container.
    builder.Services.AddRazorPages();
    var app = builder.Build();
    // Configure the HTTP request pipeline.
    if (!app.Environment.IsDevelopment())
    {
         app.UseExceptionHandler("/Error");
         // The default HSTS value is 30 days.
         app.UseHsts();
    }
    app.UseHttpsRedirection();
    app.UseStaticFiles();
    app.UseRouting();
    app.UseAuthorization();
    app.MapControllers();
    app.MapRazorPages();
    app.Run();
}

Public Shared Sub Main(ByVal args() As String)
	Dim builder = WebApplication.CreateBuilder(args)
	builder.Services.AddDbContext(Of ApplicationDBContext)(Sub(options)
		 options.UseSqlServer(builder.Configuration.GetConnectionString("ProductDB"))
	End Sub)
	builder.Services.AddControllers()
	' Add services to the container.
	builder.Services.AddRazorPages()
	Dim app = builder.Build()
	' Configure the HTTP request pipeline.
	If Not app.Environment.IsDevelopment() Then
		 app.UseExceptionHandler("/Error")
		 ' The default HSTS value is 30 days.
		 app.UseHsts()
	End If
	app.UseHttpsRedirection()
	app.UseStaticFiles()
	app.UseRouting()
	app.UseAuthorization()
	app.MapControllers()
	app.MapRazorPages()
	app.Run()
End Sub

Add-Migration init

Update-Database

public void ExportToExcel(List<Product> productList)
{
    WorkBook wb = WorkBook.Create(ExcelFileFormat.XLSX); // Create a new workbook instance
    WorkSheet ws = wb.DefaultWorkSheet; // Access the default worksheet
    int rowCount = 1;

    // Iterate over the product list and fill the worksheet
    foreach (Product product in productList)
    {
        ws["A" + rowCount].Value = product.Id.ToString();
        ws["B" + rowCount].Value = product.ProductName;
        ws["C" + rowCount].Value = product.ProductDescription;
        ws["D" + rowCount].Value = product.ProductPrice;
        ws["E" + rowCount].Value = product.ProductWeight;
        ws["F" + rowCount].Value = product.ProductManufacturingDate;
        ws["G" + rowCount].Value = product.ProductExpiryDate;
        rowCount++;
    }
    wb.SaveAs("product.xlsx"); // Save the workbook as an Excel file
}

Public Sub ExportToExcel(ByVal productList As List(Of Product))
	Dim wb As WorkBook = WorkBook.Create(ExcelFileFormat.XLSX) ' Create a new workbook instance
	Dim ws As WorkSheet = wb.DefaultWorkSheet ' Access the default worksheet
	Dim rowCount As Integer = 1

	' Iterate over the product list and fill the worksheet
	For Each product As Product In productList
		ws("A" & rowCount).Value = product.Id.ToString()
		ws("B" & rowCount).Value = product.ProductName
		ws("C" & rowCount).Value = product.ProductDescription
		ws("D" & rowCount).Value = product.ProductPrice
		ws("E" & rowCount).Value = product.ProductWeight
		ws("F" & rowCount).Value = product.ProductManufacturingDate
		ws("G" & rowCount).Value = product.ProductExpiryDate
		rowCount += 1
	Next product
	wb.SaveAs("product.xlsx") ' Save the workbook as an Excel file
End Sub

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