C#从Datagrid中导出EXCEL表

private void Export(System.Web.UI.WebControls.DataGrid dg,string fileName,string typeName)




...{


System.Web.HttpResponse httpResponse = Page.Response;


httpResponse.AppendHeader


("Content-Disposition","attachment;filename="


+HttpUtility.UrlEncode(fileName,System.Text.Encoding.UTF8));


httpResponse.ContentEncoding=System.Text.Encoding.GetEncoding("GB2312");


httpResponse.ContentType = typeName;


System.IO.StringWriter tw = new System.IO.StringWriter() ;


System.Web.UI.HtmlTextWriter hw = new System.Web.UI.HtmlTextWriter (tw);


dg.RenderControl(hw);


string filePath = Server.MapPath("..")+fileName;


System.IO.StreamWriter sw = System.IO.File.CreateText(filePath);


sw.Write(tw.ToString());


sw.Close();




DownFile(httpResponse,fileName,filePath);


httpResponse.End();


}




private bool DownFile(System.Web.HttpResponse Response,string fileName,string fullPath)




...{


try




...{


Response.ContentType = "application/octet-stream";




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


HttpUtility.UrlEncode(fileName,System.Text.Encoding.UTF8) + ";charset=GB2312");


System.IO.FileStream fs= System.IO.File.OpenRead(fullPath);


long fLen=fs.Length;


int size=102400;//每100K同时下载数据


byte[] readData = new byte[size];//指定缓冲区的大小


if(size>fLen)size=Convert.ToInt32(fLen);


long fPos=0;


bool isEnd=false;


while (!isEnd)




...{


if((fPos+size)>fLen)




...{


size=Convert.ToInt32(fLen-fPos);


readData = new byte[size];


isEnd=true;


}


fs.Read(readData, 0, size);//读入一个压缩块


Response.BinaryWrite(readData);


fPos+=size;


}


fs.Close();


System.IO.File.Delete(fullPath);


return true;


}


catch




...{


return false;


}


}