.net 文件下载方法
public void DownLoadMethod(string
FilePath)
{
string
hzm =
Path.GetExtension(FilePath).ToLower();
string FileName =
Path.GetFileNameWithoutExtension(FilePath);
string Name = FileName +
hzm;
if
(hzm.ToLower() ==
".pdf")
{
Response.ContentType =
"application/pdf";
Response.AppendHeader("Content-Disposition", "attachment; filename=" +
HttpUtility.UrlEncode(Name,
System.Text.Encoding.UTF8));
Response.TransmitFile(Server.MapPath(FilePath));
}
else
if (hzm.ToLower() == ".jpeg" || hzm.ToLower() ==
".jpg")
{
Response.ContentType =
"image/jpeg";
Response.AppendHeader("Content-Disposition", "attachment; filename=" +
HttpUtility.UrlEncode(Name,
System.Text.Encoding.UTF8));
Response.TransmitFile(Server.MapPath(FilePath));
}
else
if (hzm.ToLower() ==
".gif")
{
Response.ContentType =
"image/GIF";
Response.AppendHeader("Content-Disposition", "attachment; filename=" +
HttpUtility.UrlEncode(Name,
System.Text.Encoding.UTF8));
Response.TransmitFile(Server.MapPath(FilePath));
}
else
if (hzm.ToLower() == ".doc" || hzm.ToLower() == "rtf" || hzm.ToLower() ==
".docx")
{
Response.ContentType =
"Application/msword";
Response.AppendHeader("Content-Disposition", "attachment; filename=" +
HttpUtility.UrlEncode(Name,
System.Text.Encoding.UTF8));
Response.TransmitFile(Server.MapPath(FilePath));
}
else
if (hzm.ToLower() == ".xls" || hzm.ToLower() ==
".xlsx")
{
Response.ContentType =
"Application/x-msexcel";
Response.AppendHeader("Content-Disposition", "attachment; filename=" +
HttpUtility.UrlEncode(Name,
System.Text.Encoding.UTF8));
Response.TransmitFile(Server.MapPath(FilePath));
}
else
if (hzm.ToLower() ==
".txt")
{
Response.ContentType =
"text/plain";
Response.AppendHeader("Content-Disposition", "attachment; filename=" +
HttpUtility.UrlEncode(Name,
System.Text.Encoding.UTF8));
Response.TransmitFile(Server.MapPath(FilePath));
}
else
if (hzm.ToLower() == ".htm" || hzm.ToLower() ==
".html")
{
Response.ContentType =
"text/HTML";
Response.AppendHeader("Content-Disposition", "attachment; filename=" +
HttpUtility.UrlEncode(Name,
System.Text.Encoding.UTF8));
Response.TransmitFile(Server.MapPath(FilePath));
}
else
{
if (hzm.ToLower() ==
".zip")
{
//以字符流的形式下载文件
FileStream fs = new FileStream(Server.MapPath(FilePath),
FileMode.Open);
byte[] bytes = new
byte[(int)fs.Length];
fs.Read(bytes, 0,
bytes.Length);
fs.Close();
Response.ContentType =
"application/octet-stream";
//通知浏览器下载文件而不是打开
Response.AddHeader("Content-Disposition", "attachment; filename=" +
HttpUtility.UrlEncode(Name,
System.Text.Encoding.UTF8));
Response.BinaryWrite(bytes);
Response.Flush();
Response.End();
}
}
}
//下载 压缩文件 *.zip
private void DownloadFiles(string
url)
{
if
(url.Equals(""))
{
return;
}
try
{
if
(!File.Exists(Server.MapPath(url)))
{
return;
}
FileInfo fi = new
FileInfo(Server.MapPath(url));
Response.Clear();
Response.ContentType =
"application/octet-stream";
string fileName = fi.FullName.Substring(fi.FullName.LastIndexOf("\\") +
1);
if (fileName.Length > 32 && fileName.Split(‘-‘).Length >=
5)
{
Response.AppendHeader("Content-Disposition", "attachment;filename=" +
HttpUtility.UrlEncode(fi.FullName.Substring(fi.FullName.LastIndexOf("\\") +
1).Substring(fi.FullName.Substring(fi.FullName.LastIndexOf("\\") +
1).IndexOf(‘_‘) + 1),
System.Text.Encoding.UTF8));
}
else
{
Response.AppendHeader("Content-Disposition", "attachment;filename=" +
HttpUtility.UrlEncode(fi.FullName.Substring(fi.FullName.LastIndexOf("\\") + 1),
System.Text.Encoding.UTF8));
}
Response.AppendHeader("Content-Length",
fi.Length.ToString());
Response.WriteFile(fi.FullName);
Response.Flush();
Response.End();
}
catch
(FileNotFoundException
ex)
{
Response.Write(ex.Message);
}
}
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