.NET 使用 Office Open XML SDK2.5

public static void WriteToWordDoc(string filepath, string txt)
{
    // Open a WordprocessingDocument for editing using the filepath.
    using (WordprocessingDocument wordprocessingDocument =
         WordprocessingDocument.Open(filepath, true))
    {
        // Assign a reference to the existing document body.
        Body body = wordprocessingDocument.MainDocumentPart.Document.Body;

        // Add a paragraph with some text.
        Paragraph para = body.AppendChild(new Paragraph());
        Run run = para.AppendChild(new Run());
        run.AppendChild(new Text(txt));
    }
}

public static void WriteToWordDoc(string filepath, string txt)
{
    // Open a WordprocessingDocument for editing using the filepath.
    using (WordprocessingDocument wordprocessingDocument =
         WordprocessingDocument.Open(filepath, true))
    {
        // Assign a reference to the existing document body.
        Body body = wordprocessingDocument.MainDocumentPart.Document.Body;

        // Add new text.
        Paragraph para = body.AppendChild(new Paragraph());
        Run run = para.AppendChild(new Run());

        // Apply bold formatting to the run.
        RunProperties runProperties = run.AppendChild(new RunProperties(new Bold()));   
        run.AppendChild(new Text(txt));                
    }
}

public static void InsertTableInDoc(string filepath)
{
    // Open a WordprocessingDocument for editing using the filepath.
    using (WordprocessingDocument wordprocessingDocument =
         WordprocessingDocument.Open(filepath, true))
    {
        // Assign a reference to the existing document body.
        Body body = wordprocessingDocument.MainDocumentPart.Document.Body;

        // Create a table.
        Table tbl = new Table();

        // Set the style and width for the table.
        TableProperties tableProp = new TableProperties();
        TableStyle tableStyle = new TableStyle() { Val = "TableGrid" };

        // Make the table width 100% of the page width.
        TableWidth tableWidth = new TableWidth() { Width = "5000", Type = TableWidthUnitValues.Pct };
        
        // Apply
        tableProp.Append(tableStyle, tableWidth);
        tbl.AppendChild(tableProp);

        // Add 3 columns to the table.
        TableGrid tg = new TableGrid(new GridColumn(), new GridColumn(), new GridColumn());
        tbl.AppendChild(tg);
        
        // Create 1 row to the table.
        TableRow tr1 = new TableRow();

        // Add a cell to each column in the row.
        TableCell tc1 = new TableCell(new Paragraph(new Run(new Text("1"))));
        TableCell tc2 = new TableCell(new Paragraph(new Run(new Text("2"))));
        TableCell tc3 = new TableCell(new Paragraph(new Run(new Text("3"))));
        tr1.Append(tc1, tc2, tc3);
        
        // Add row to the table.
        tbl.AppendChild(tr1);

        // Add the table to the document
        body.AppendChild(tbl);
    }
}