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How to Download Picture Forcefully from GridView/DataList


Posted Date: 01 Jul 2008    Resource Type: Code Snippets    Category: C# Syntax
Author: Rumpa MMember Level: Gold    
Rating: Points: 7



protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
{
if (e.CommandName == "dwn")
{
string picpath = Convert.ToString(e.CommandArgument);
int len = picpath.Length;
picname = picpath.Substring(8);
DownloadFile(picname, true);
}
}

public void DownloadFile(string fname, bool ForceDownload)
{
string path = MapPath("upload") + "\\" + fname;
string name = Path.GetFileName(path);
string ext = Path.GetExtension(path);
string type = "";
// set known types based on file extension
if (ext != null)
{
switch (ext.ToLower())
{
case ".htm":
case ".html":
type = "text/HTML";
break;

case ".txt":
type = "text/plain";
break;

case ".doc":
case ".rtf":
type = "Application/msword";
break;

case ".jpg":
type = "image/.jpg";
break;
case ".jpeg":
type = "image/.jpeg";
break;
case ".png":
type = "image/.png";
break;
case ".gif":
type = "image/.gif";
break;
}
}

if (ForceDownload)
{
Response.AppendHeader("content-disposition", "attachment; filename=" + name);
}
Response.ContentType = type;
Response.WriteFile(path);
Response.End();
}



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