/**/
/// <summary>
/// 下载文件
/// </summary>
/// <param name= "filepath "> </param>
public
static
void
DownloadFile(
string
filepath) 
{
string strContentType = " ";
string strFileName = " ";
string strFilePath = " ";
int intIndex1 = -1;
int intIndex2 = -1;
int intIndex = 0; 
if (filepath.EndsWith( ".doc ")) 

{
strContentType = "application/msword ";
}
else if (filepath.EndsWith( ".xls ")) 

{
//strContentType = "application/x-zaurus-xls "
strContentType = "application/vnd.ms-excel ";
}
else if (filepath.EndsWith( ".pdf ")) 

{
strContentType = "application/pdf ";
}
else if (filepath.EndsWith( ".ppt ")) 

{
//strContentType = "application/powerpoint "
strContentType = "application/vnd.ms-powerpoint ";
}
else if (filepath.EndsWith( ".jpg ") ¦ ¦ filepath.EndsWith( ".jpeg ") ¦ ¦ filepath.EndsWith( ".jpe ")) 

{
strContentType = "image/jpeg ";
}
else if (filepath.EndsWith( ".bmp ")) 

{
strContentType = "image/bmp ";
}
else if (filepath.EndsWith( ".gif ")) 

{
strContentType = "image/gif ";
}
else if (filepath.EndsWith( ".zip ")) 

{
strContentType = "application/zip ";
}
else if (filepath.EndsWith( ".txt ")) 

{
strContentType = "text/plain ";
}
else 

{
strContentType = "application/octet-stream ";
} 
intIndex1 = filepath.LastIndexOf( "/ ");
intIndex2 = filepath.LastIndexOf( "\ "); 
if (intIndex1 > intIndex2) 

{
intIndex = intIndex1;
}
else 

{
intIndex = intIndex2;
} 
if (intIndex > -1) 

{
if (intIndex + 1 < filepath.Length)
strFileName = filepath.Substring(intIndex + 1);
}
else 

{
strFileName = filepath;
} 
// ファイルパス処理
if (filepath.StartsWith( "/ ") ¦ ¦ filepath.StartsWith( "\ "))
strFilePath = HttpContext.Current.Server.MapPath( "/ ") + filepath;
else
strFilePath = filepath; 
if (FileUtil.isFileExist(strFilePath)) 

{
HttpContext.Current.Response.Clear();
HttpContext.Current.Response.ContentType = strContentType;
HttpContext.Current.Response.AddHeader( "Content-Disposition ", "attachment; filename= " + HttpUtility.UrlEncode(strFileName)); 
HttpContext.Current.Response.WriteFile(strFilePath);
//HttpContext.Current.Response.BinaryWrite(objFileIO.IFileByte(strFilePath)); 
//HttpContext.Current.Response.End();
HttpContext.Current.Response.Flush();
HttpContext.Current.Response.Close();
}
else 

{
SetGlobalMessageID(FindKeyValueCutNull(GXML.COMMONMESSAGE, GXML.DOWNLOAD_FILE_NOEXIST));
}
转载于:https://www.cnblogs.com/Nina-piaoye/archive/2007/11/13/958253.html
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