C#实现将DataTable导出为PDF文档

Install-Package Spire.PDF

using System;
using System.Data;
using Spire.Pdf;
using Spire.Pdf.Graphics;
using Spire.Pdf.Tables;
using System.Drawing; // 用于 Color 和 PointF

public static DataTable GetSampleDataTable()
{
    DataTable dataTable = new DataTable("Products");

    // 定义列
    dataTable.Columns.Add("ProductID", typeof(int));
    dataTable.Columns.Add("ProductName", typeof(string));
    dataTable.Columns.Add("Category", typeof(string));
    dataTable.Columns.Add("UnitPrice", typeof(decimal));
    dataTable.Columns.Add("UnitsInStock", typeof(int));

    // 添加示例数据行
    dataTable.Rows.Add(1, "Chai", "Beverages", 18.00m, 39);
    dataTable.Rows.Add(2, "Chang", "Beverages", 19.00m, 17);
    dataTable.Rows.Add(3, "Aniseed Syrup", "Confections", 10.00m, 13);
    dataTable.Rows.Add(4, "Chef Anton's Cajun Seasoning", "Condiments", 22.00m, 53);
    dataTable.Rows.Add(5, "Chef Anton's Gumbo Mix", "Condiments", 21.35m, 0);
    dataTable.Rows.Add(6, "Grandma's Boysenberry Spread", "Condiments", 25.00m, 120);
    dataTable.Rows.Add(7, "Uncle Bob's Organic Dried Pears", "Produce", 30.00m, 15);
    dataTable.Rows.Add(8, "Northwoods Cranberry Sauce", "Condiments", 40.00m, 6);

    return dataTable;
}

public static void ExportDataTableToPdf(DataTable dataTable, string filePath)
{
    // 创建 PDF 文档
    PdfDocument doc = new PdfDocument();
    PdfPageBase page = doc.Pages.Add();

    // 添加标题
    string title = "Product Inventory Report";
    PdfFont titleFont = new PdfFont(PdfFontFamily.Helvetica, 20f, PdfFontStyle.Bold);
    SizeF titleSize = titleFont.MeasureString(title);
    float titleX = (page.Canvas.ClientSize.Width - titleSize.Width) / 2;
    page.Canvas.DrawString(title, titleFont, PdfBrushes.DarkBlue, titleX, 20);

    // 创建 PdfTable
    PdfTable pdfTable = new PdfTable();

    // 设置数据源
    pdfTable.DataSource = dataTable;

    // 表格样式设置
    pdfTable.Style.DefaultStyle.Font = new PdfFont(PdfFontFamily.Helvetica, 10f);
    pdfTable.Style.HeaderStyle.Font = new PdfFont(PdfFontFamily.Helvetica, 11f, PdfFontStyle.Bold);
    pdfTable.Style.HeaderStyle.BackgroundBrush = PdfBrushes.LightGray;
    pdfTable.Style.ShowHeader = true; // 显示表头

    // 绘制表格
    PdfLayoutResult result = pdfTable.Draw(page, new PointF(0, 60));

    // 保存文件
    doc.SaveToFile(filePath);
    doc.Close();
}

public static void ExportDataTableToPdfWithStyle(DataTable dataTable, string filePath)
{
    // 创建 PDF 文档
    PdfDocument doc = new PdfDocument();
    PdfPageBase page = doc.Pages.Add();

    // 设置页边距
    doc.PageSettings.Margins.All = 40;

    // 添加标题
    string title = "Detailed Product Inventory Report";
    PdfFont titleFont = new PdfFont(PdfFontFamily.Helvetica, 24f, PdfFontStyle.Bold);
    SizeF titleSize = titleFont.MeasureString(title);
    float titleX = (page.Canvas.ClientSize.Width - titleSize.Width) / 2;
    page.Canvas.DrawString(title, titleFont, PdfBrushes.DarkBlue, titleX, 20);

    // 添加说明文字
    string introduction = "This report provides an overview of current product inventory levels, detailing product ID, name, category, unit price, and units in stock.";
    PdfFont introFont = new PdfFont(PdfFontFamily.Helvetica, 12f);
    page.Canvas.DrawString(
        introduction,
        introFont,
        PdfBrushes.Black,
        new PointF(0, 60),
        new PdfStringFormat(PdfStringFormatFlags.WordBreak) { MeasureTrailingSpaces = true }
    );

    // 计算表格起始位置
    float tableY = 60 + introFont.MeasureString(introduction, page.Canvas.ClientSize.Width).Height + 20;

    // 创建 PdfTable
    PdfTable pdfTable = new PdfTable();
    pdfTable.DataSource = dataTable;

    // 表格样式
    pdfTable.Style.DefaultStyle.Font = new PdfFont(PdfFontFamily.Helvetica, 9f);
    pdfTable.Style.HeaderStyle.Font = new PdfFont(PdfFontFamily.Helvetica, 10f, PdfFontStyle.Bold);
    pdfTable.Style.HeaderStyle.BackgroundBrush = new PdfSolidBrush(Color.FromArgb(120, 180, 230));
    pdfTable.Style.HeaderStyle.TextBrush = PdfBrushes.White;
    pdfTable.Style.ShowHeader = true;

    // 交替行背景色
    pdfTable.Style.AlternateRowStyle.BackgroundBrush = new PdfSolidBrush(Color.LightYellow);

    // 单元格内边距
    pdfTable.Style.DefaultStyle.CellPadding = 5;

    // 设置列宽
    pdfTable.Columns[0].Width = 70f;
    pdfTable.Columns[1].Width = 150f;
    pdfTable.Columns[2].Width = 100f;
    pdfTable.Columns[3].Width = 80f;
    pdfTable.Columns[4].Width = 90f;

    // 绘制表格（自动分页）
    PdfLayoutResult result = pdfTable.Draw(page, new PointF(0, tableY));

    // 保存文件
    doc.SaveToFile(filePath);
    doc.Close();
}