实现环境：Visual Studio 2010, Office 2010, VSTO 4.0, .NET Framework 4.0

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.Office.Tools.Ribbon;
using Excel = Microsoft.Office.Interop.Excel;
using System.Windows.Forms;namespace ExcelAddIn8
{public partial class Ribbon1{private void Ribbon1_Load(object sender, RibbonUIEventArgs e){}/// <summary>/// 在下面的动作中，将从选中的文件中的用户自定义区域（UsedRange）中拷贝/// 数据到现在这个WorkSheet中并根据选中文件中UsedRange的行高列宽来设定被/// 粘贴数据区域的行高列宽。/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void button1_Click(object sender, RibbonControlEventArgs e){var missing = Type.Missing;string SourcePath = string.Empty;Excel.Application objApplication = Globals.ThisAddIn.Application;Excel.Application objSourceApplication = new Excel.Application();Excel.Workbook objTargetWorkbook = objApplication.ActiveWorkbook;OpenFileDialog objOpenFileDialog = new OpenFileDialog();objOpenFileDialog.Filter = "Excel Document(.xlsx)|*.xlsx";objOpenFileDialog.ShowDialog();SourcePath = objOpenFileDialog.FileName;if (SourcePath.Length > 0){Excel.Workbook objSourceWorkbook = objSourceApplication.Workbooks.Open(SourcePath, missing, missing, missing,missing,missing,missing,missing, missing, missing, missing, missing, missing,missing, missing);Excel.Worksheet objWorkSheet = objSourceWorkbook.Worksheets[1];objWorkSheet.UsedRange.Copy(missing);Excel.Worksheet objTargetSheet =objTargetWorkbook.ActiveSheet;if (objTargetSheet != null){objTargetSheet.Paste();Excel.Range objTargetRange = objApplication.ActiveCell;//以下代码用来重新设定Range区域，使之与源文件中的UsedRange范//围相当。objTargetRange = objTargetSheet.Range[objTargetSheet.Cells[objTargetRange.Row, objTargetRange.Column],objTargetSheet.Cells[objTargetRange.Row + objWorkSheet.UsedRange.Rows.Count-1,objTargetRange.Column + objWorkSheet.UsedRange.Columns.Count]];//根据UsedRange的列宽来设置选定区域的列宽。objTargetRange.ColumnWidth = objWorkSheet.UsedRange.ColumnWidth;//根据UsedRange的行高来设置选定区域的行高。objTargetRange.RowHeight = objWorkSheet.UsedRange.RowHeight;}}((Excel._Application)objSourceApplication).Quit();objSourceApplication = null;}}
}

相关资源：http://download.csdn.net/detail/tx_officedev/3900007