专业Excel组件Spire.XLS 教程：在Excel中合并单元格

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml.Linq;
using Excel = Microsoft.Office.Interop.Excel;
using Office = Microsoft.Office.Core;
using Microsoft.Office.Tools.Excel;
namespace VSTO
{
public partial class ThisAddIn
{
private void ThisAddIn_Startup(object sender, System.EventArgs e)
{
//Instantiate the Application object
Excel.Application ExcelApp = Application;
//Add a Workbook
Excel.Workbook workbook = ExcelApp.Workbooks.Add();
//Get the First sheet
Excel.Worksheet sheet = (Excel.Worksheet)workbook.Sheets["Sheet1"];
//Merge A1-B5 to one cell
sheet.get_Range("A1", "B5").Merge();
//Save the file
workbook.SaveAs("MergedCells.xlsx");
}
private void ThisAddIn_Shutdown(object sender, System.EventArgs e)
{
}
#region VSTO generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InternalStartup()
{
this.Startup += new System.EventHandler(ThisAddIn_Startup);
this.Shutdown += new System.EventHandler(ThisAddIn_Shutdown);
}
#endregion
}
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Spire.Xls;

namespace Spire.XLS
{
class Program
{
static void Main(string[] args)
{
//Initialize a new instance of workbook
Workbook workbook = new Workbook();

//Get the first worksheet
Worksheet sheet = workbook.Worksheets[0];

//Merge A1-B5 to one cell
sheet.Range["A1:B5"].Merge();

//Save and Launch
workbook.SaveToFile("MergedCells.xlsx", ExcelVersion.Version2010);
System.Diagnostics.Process.Start("MergedCells.xlsx");

}
}

}