本次经验内容分享在C#程序中（附VB.NET代码）提取PDF中的表格的方法。具体方法和步骤参考如下。
工具/原料
Visual Studio 2017
PDF文档
Spire.PDF for .NET 7.10.4
Windows 10
引用dll文件
1、鼠标右键点击“引用”，“管理NuGet程序包”，
2、点击“浏览”，在搜索框中输入，点击“安装”，
3、或者使用PM控制台安装:PM>Install-Package Spire.PDF -Version 7.10.4
C#代码
1、using Spire.Pdf;using Spire.Pdf.Utilities;using System.IO;using System.Text;namespac髫潋啜缅e ExtractTable{ class Program { static void Main(string[] args) { //加载PDF文档 PdfDocument pdf = new PdfDocument(); pdf.LoadFromFile("sample.pdf"); StringBuilder builder = new StringBuilder(); //抽取表格 PdfTableExtractor extractor = new PdfTableExtractor(pdf); PdfTable[] tableLists = null; for (int pageIndex = 0; pageIndex < pdf.Pages.Count; pageIndex++) { tableLists = extractor.ExtractTable(pageIndex); if (tableLists != null && tableLists.Length > 0) { foreach (PdfTable table in tableLists) { int row = table.GetRowCount(); int column = table.GetColumnCount(); for (int i = 0; i < row; i++) { for (int j = 0; j < column; j++) { string text = table.GetText(i, j); builder.Append(text + " "); } builder.Append("\r\n"); } } } } //保存提取的表格内容到txt文档 File.WriteAllText("ExtractedTable.txt", builder.ToString()); } }}
2、完成代码后，执行程序，生成txt文档。表格提取效果如图：
VB.NET代码
1、Imports Spire.PdfImports Spire.Pdf.UtilitiesImports System.IOImports System.TextNamespace ExtractTable Class Program Private Shared Sub Main(args As String()) '加载PDF文档 Dim pdf As New PdfDocument() pdf.LoadFromFile("sample.pdf") Dim builder As New StringBuilder() '抽取表格 Dim extractor As New PdfTableExtractor(pdf) Dim tableLists As PdfTable() = Nothing For pageIndex As Integer = 0 To pdf.Pages.Count - 1 tableLists = extractor.ExtractTable(pageIndex) If tableLists IsNot Nothing AndAlso tableLists.Length > 0 Then For Each table As PdfTable In tableLists Dim row As Integer = table.GetRowCount() Dim column As Integer = table.GetColumnCount() For i As Integer = 0 To row - 1 For j As Integer = 0 To column - 1 Dim text As String = table.GetText(i, j) builder.Append(text & Convert.ToString(" ")) Next builder.Append(vbCr & vbLf) Next Next End If Next '保存提取的表格内容到txt文档 File.WriteAllText("ExtractedTable.txt", builder.ToString()) End Sub End ClassEnd Namespace