Enabling a user to download a file

Question

I am working on an image gallery, and on the browse image module, I have a download icon. I need it to behave as a download button. When the user clicks on it, they should be presented with save file dialog, or the file should be downloaded using their default browser download set-up.

I tried many ways, but no luck.

The download Icons appear in a Modal-popup and hence all code is wrapped inside UpdatePannel
These images are of different formats (jpeg, gif, tif, psd)

score 4 · Accepted Answer · edited May 23 '17 at 12:16

4

Look at http://www.codeproject.com/Articles/74654/File-Download-in-ASP-NET-and-Tracking-the-Status-o or Best way to stream files in ASP.NET

edited May 23 '17 at 12:16

Community

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answered May 10 '12 at 11:48

Sascha

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`AddHeader("Content-Disposition", "attachment;filename="+ FileName.Name);` is the important part to get a save as dialog ... – Hinek May 10 '12 at 11:50
@Sascha This seems to be working the only problem is these icons are inside updatePannel, and hence the postback calls are async, I guess that what stopping the code to execute, but when I put the code in Page_Load it worked fine. – foo-baar May 10 '12 at 13:32
Glad to hear you're one step further. Maybe this helps in regard to the ajax download: http://groups.google.com/group/ajax-world/browse_thread/thread/b7abc61c1f91376a/af58d68f0b706ae9?hl=en&pli=1 – Sascha May 10 '12 at 13:41

score 0 · Answer 2 · answered May 11 '12 at 09:51

Finally sorted out with :

A) To download a file at Client Location :

public void downloadFile(string fileName, string filePath)
    {
        Response.ContentType = "application/octet-stream";
        Response.AddHeader("Content-Disposition", string.Format("attachment; filename=\"{0}\"", fileName));
        Response.WriteFile(filePath + fileName);
    }

B) Since the function triggering controls(imgDownload, imgDownloadPsd) are wrapped under async call : Add this to Page Load :

protected void Page_Load(object sender, EventArgs e)
{   ScriptManager.GetCurrent(this.Page).RegisterPostBackControl(imgDownload);
    ScriptManager.GetCurrent(this.Page).RegisterPostBackControl(imgDownloadPsd);
}

Enabling a user to download a file

2 Answers2