环境：c#2005,Excel2003.
1 实现后的效果如下图：
(截图)
2 实现代码：
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using Microsoft.Office.Interop.Owc11;

namespace CityToProvince.GUILayer
{
    public partial class frmExcel : Form
    {
        public frmExcel()
        {
            InitializeComponent();
        }

private void buttonOpen_Click(object sender, EventArgs e)
        {
            OpenFileDialog myOpenFileDialog = new OpenFileDialog();
            myOpenFileDialog.Filter = "Excel文件(*.xls)|*.xls|xml格式表格(*.xml)|*.xml";
            myOpenFileDialog.FilterIndex = 2;
            myOpenFileDialog.Title = "选择xml文件";
            myOpenFileDialog.InitialDirectory = "c:\\";
            myOpenFileDialog.RestoreDirectory = true;
            DialogResult dr = myOpenFileDialog.ShowDialog();
            if (dr == DialogResult.OK)
            {
                try
                {
                    this.axSpreadsheetExcel.XMLURL = myOpenFileDialog.FileName;
                }
                catch
                {
                    MessageBox.Show("错误");
                }
            }
        }

private void buttonConvert_Click(object sender, EventArgs e)
        {//xls->xml and open
            OpenFileDialog myOpenFileDialog = new OpenFileDialog();
            myOpenFileDialog.Filter = "Excel文件(*.xls)|*.xls";
            myOpenFileDialog.FilterIndex = 1;
            myOpenFileDialog.Title = "选择Excel文件";
            myOpenFileDialog.InitialDirectory = "c:\\";
            myOpenFileDialog.RestoreDirectory = true;
            DialogResult dr = myOpenFileDialog.ShowDialog();
            if (dr == DialogResult.OK)
            {
                try
                {
                    ExcelProcess.ExcelProcess myExcel = new ExcelProcess.ExcelProcess();
                    myExcel.OpenFileName = myOpenFileDialog.FileName;
                    string saveXmlName = myOpenFileDialog.FileName.ToString().Replace("xls", "xml");
                    if (System.IO.File.Exists(saveXmlName))
                    {
                        System.IO.File.Delete(saveXmlName);
                    }
                    myExcel.SaveFileName = saveXmlName;
                    myExcel.OpenExcelFile();
                    myExcel.SaveExcelAsXML();
                    myExcel.CloseExcelApplication();

}
                catch
                {
                    MessageBox.Show("转换错误");
                }
            }

}

private void buttonClose_Click(object sender, EventArgs e)
        {
            //this.axSpreadsheetExcel.XMLURL = null;
            this.Close();
        }

private void buttonConvertOpen_Click(object sender, EventArgs e)
        {
            //xls->xml and open
            OpenFileDialog myOpenFileDialog = new OpenFileDialog();
            myOpenFileDialog.Filter = "Excel文件(*.xls)|*.xls";
            myOpenFileDialog.FilterIndex = 1;
            myOpenFileDialog.Title = "选择Excel文件";
            myOpenFileDialog.InitialDirectory = "c:\\";
            myOpenFileDialog.RestoreDirectory = true;
            DialogResult dr = myOpenFileDialog.ShowDialog();
            if (dr == DialogResult.OK)
            {
                try
                {
                    ExcelProcess.ExcelProcess myExcel = new ExcelProcess.ExcelProcess();
                    myExcel.OpenFileName = myOpenFileDialog.FileName;
                    string saveXmlName = myOpenFileDialog.FileName.ToString().Replace("xls", "xml");
                    if (System.IO.File.Exists(saveXmlName))
                    {
                        System.IO.File.Delete(saveXmlName);
                    }
                    myExcel.SaveFileName = saveXmlName;
                    myExcel.OpenExcelFile();
                    myExcel.SaveExcelAsXML();
                    myExcel.CloseExcelApplication();
                    this.axSpreadsheetExcel.XMLURL = saveXmlName;
                }
                catch
                {
                    MessageBox.Show("转换错误");
                }
            }

}

private void buttonSave_Click(object sender, EventArgs e)
        {
            SaveFileDialog mySaveFileDialog = new SaveFileDialog();
            mySaveFileDialog.Title = "导出Excel文件的名称";
            mySaveFileDialog.Filter = "Excel文件|*.xls";
            string exportExcelFile;
            mySaveFileDialog.InitialDirectory = SysCommon.ShareData.ExportExcelPath;
            DialogResult mydr = mySaveFileDialog.ShowDialog();
            if (mydr == DialogResult.OK)
            {
                exportExcelFile = mySaveFileDialog.FileName;
                this.axSpreadsheetExcel.Export(exportExcelFile, SheetExportActionEnum.ssExportActionNone,
                    SheetExportFormat.ssExportAsAppropriate);
            }
        }
    }
}
其中ExcelProcess是我写的一个操作excel的类。

转载：http://emanlee.cnblogs.com/