C#文件下载应该怎么做

protected void DownloadFile(string filename)//文件下载函数

{

string saveFileName = "test.xls";

int intStart = filename.LastIndexOf("/") + 1;

saveFileName = filename.Substring(intStart, filename.Length - intStart);

Response.Clear();

Response.Charset = "utf-8";

Response.Buffer = true;

this.EnableViewState = false;

Response.ContentEncoding = System.Text.Encoding.UTF8;

Response.AppendHeader("Content-Disposition", "attachment;filename=" + saveFileName);

Response.WriteFile(filename);

Response.Flush();

Response.Close();

Response.End();

}

来源于： http://zcy631.blog.163.com/blog/static/489758732009423105715411/