ASP.Net中,如何自动保存文件到指定位置

代码示例如下： 
//提供下载源地址（在服务器上的地址） 
string srcPath = "C:\text.txt"; 

FileInfo fileInfo = new FileInfo(srcPath); 
//若该文件存在则弹出对话框让你选择保存地址（本地） 
if (fileInfo.Exists) 
{ 
Response.AddHeader("Content-Disposition", "attachment;filename=" + fileInfo.Name); 
Response.WriteFile(srcPath); 
Response.Flush(); 
Response.Close(); 
}

补充：不弹出对话框代码如下：
/**//**//** <summary>
/** 下载文件
/** </summary>
/** <param name="filename">文件物理地址</param> 

protected void DownloadFile(string filename)
...{
string saveFileName = "test.xls";
int intStart = filename.LastIndexOf("\")+1;
saveFileName = filename.Substring(intStart,filename.Length-intStart);
FileStream MyFileStream; 
long FileSize; 

MyFileStream = new FileStream(filename,FileMode.Open); 
FileSize = MyFileStream.Length; 

byte[] Buffer = new byte[(int)FileSize]; 
MyFileStream.Read(Buffer, 0, (int)FileSize); 
MyFileStream.Close(); 

Response.AddHeader("Content-Disposition", "attachment;filename="+saveFileName);
Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");
Response.ContentType = "application/vnd.ms-excel"; 

Response.BinaryWrite(Buffer); 
Response.Flush(); 
Response.Close(); 
Response.End();

}