首先添加两个引用，如下图：
在引用过程中可能会出现Microsoft.Office 11.0 Object Library引用不上，这个可能是你的Office2003没有选择支持.net导致的，你可以再次运行office的安装文件，然后找到excel项展开节点，选择支持.net
接着在页面里using Namespace:
using Excel = Microsoft.Office.Interop.Excel;
以下是详细代码：
#region Export Data
/// <summary>
///
/// </summary>
private void Export()
{
Excel.Application excel = new Excel.Application();
Excel.Workbooks workbooks = excel.Workbooks;
Excel.Workbook workbook = workbooks.Add(Excel.XlWBATemplate.xlWBATWorksheet);
Excel.Worksheet worksheet = (Excel.Worksheet)workbook.Worksheets[1];
Excel.Range range = null;
worksheet.Cells[1, 1] = "报关单Excel";
range = (Excel.Range)worksheet.Cells[1, 1];
range.Font.Bold = true;
range.Font.Size = 18;
//range.Interior.Color = 150; //根据索引设置颜色，索引及值对照参考resource/HelpPic
range.HorizontalAlignment = Excel.XlHAlign.xlHAlignCenter;//设置文本居中
range = (Excel.Range)worksheet.get_Range(worksheet.Cells[1, 1], worksheet.Cells[1, 5]);
range.Select();
range.Merge(false);
range.Borders[Excel.XlBordersIndex.xlInsideHorizontal].Weight = Excel.XlBorderWeight.xlThin;
string FileName = Server.MapPath("..\\..\\resource\\Templetes\\") + DateTime.Today.ToString("yyyyMMdd") + new Random(DateTime.Now.Millisecond).Next(1000000).ToString() + ".xls";
//Foreach IList,And Add Data To Excel
//Write Excel Header
worksheet.Cells[3, 1] = "报关单号";
worksheet.Cells[3, 2] = "运输工具";
worksheet.Cells[3, 3] = "提运单号";
worksheet.Cells[3, 4] = "核销单号";
worksheet.Cells[3, 5] = "申报单位";
worksheet.Cells[3, 6] = "经营单位";
worksheet.Cells[3, 7] = "收/发货单位";
worksheet.Cells[3, 8] = "申报日期";
worksheet.Cells[3, 9] = "处理状态";
worksheet.Cells[3, 10] = "进口/出口";
worksheet.Cells[3, 11] = "关区";
worksheet.Cells[3, 12] = "备注";
worksheet.Cells[3, 13] = "更新时间";
//Write Excexl Body
int flag = 3;
foreach (var w in lst)
{
flag += 1;
worksheet.Cells[flag, 1] = w.entry_id_new ;
worksheet.Cells[flag, 2] = w.TRAF_NAME;
worksheet.Cells[flag, 3] = w.BILL_NO;
worksheet.Cells[flag, 4] = w.APPR_NO;
worksheet.Cells[flag, 5] = w.DECL_NAME;
worksheet.Cells[flag, 6] = w.TRADE_NAME;
worksheet.Cells[flag, 7] = w.SHIPPER;
worksheet.Cells[flag, 8] = w.DECL_DATE;
worksheet.Cells[flag, 9] = w.PROCESS_STATUS;
worksheet.Cells[flag, 10] = w.EXP_IMP;
worksheet.Cells[flag, 11] = w.SUB_CUS;
worksheet.Cells[flag, 12] = w.NOTES;
worksheet.Cells[flag, 13] = w.UPDATE_TIME;
}
try
{
workbook.Saved = true;
workbook.SaveCopyAs(FileName);
}
catch (Exception ex)
{
throw (ex);
}
workbooks.Close();
if (excel != null)
{
excel.Workbooks.Close();
excel.Quit();
int Generation = System.GC.GetGeneration(excel);
System.Runtime.InteropServices.Marshal.ReleaseComObject(excel);
excel = null;
GC.Collect(Generation);
}
GC.Collect();//强行销毁
//关闭最近打开的Excel进程
System.Diagnostics.Process[] excelProc = System.Diagnostics.Process.GetProcessesByName("EXCEL");
System.DateTime startTime = new DateTime();
int m, killId = 0;
for (m = 0; m < excelProc.Length; m++)
{
if (startTime < excelProc[m].StartTime)
{
startTime = excelProc[m].StartTime;
killId = m;
}
}
if (excelProc[killId].HasExited == false)
{
excelProc[killId].Kill();
}
//提供下载
System.IO.FileInfo file = new System.IO.FileInfo(FileName);
Response.Clear();
Response.Charset = "UTF-8";
Response.ContentEncoding = System.Text.Encoding.UTF8;
// 添加头信息，为"文件下载/另存为"对话框指定默认文件名
Response.AddHeader("Content-Disposition", "attachment; filename=" + Server.UrlEncode(file.Name));
// 添加头信息，指定文件大小，让浏览器能够显示下载进度
Response.AddHeader("Content-Length", file.Length.ToString());
// 指定返回的是一个不能被客户端读取的流，必须被下载
Response.ContentType = "Application/ms-excel";
// 把文件流发送到客户端
Response.WriteFile(file.FullName);
}
#endregion
