File not Downloading in C#

Question

I am trying to download a file which is generated by the code on shared folder. File is created, when i try to download the file the download code works fine but the file is not downloading on any browser. Download button is placed in asp.net Update Panel here is download code

try
{
    String contentType = String.Empty;
    FileInfo objFileInfo = null;

    this.FileMode = (DownloadFileMode)Session["FileMode"]; //DownloadFileMode.SingleFile;
    FileServerPath = ConfigurationManager.AppSettings["FileServerPath"];

    if (this.FileMode == DownloadFileMode.SingleFile)
    {
        if (Session["FileName"] != null)
        {
            FileName = Session["FileName"].ToString();
            contentType = "application/octet-stream";
            objFileInfo = new FileInfo(FileServerPath + FileName);
        }
        else
        {
            FileName = Session["SingleFile"].ToString();
            contentType = "application/octet-stream";
            objFileInfo = new FileInfo(FileServerPath + FileName);
        }
    }
    else if (this.FileMode == DownloadFileMode.ZippedFile)
    {
        FilesList = (List<String>)Session["FilesList"];
        contentType = "application/x-zip-compressed";
        if (FilesList.Count == 0)
            throw new Exception("No file to download");
        String strFilePath = String.Empty;
        String strZipPath = String.Empty;
        strZipPath = FileServerPath + "file" + CurrentUserSession.UserId.ToString() + "_" + CurrentUserSession.SessionId.ToString() + "_" + DateTime.Now.ToShortDateString().Replace("/", "-") + ".zip";
        DownloadFiles(strZipPath, FilesList);
        objFileInfo = new FileInfo(strZipPath);
    }
    else
    {
        ScriptManager.RegisterStartupScript(this.Page, typeof(String), "MessageAlert", "alert('Invalid file mode');", true);
    }

    Response.Clear();
    Response.AddHeader("Content-Disposition", "attachment; filename=" + objFileInfo.Name);
    Response.AddHeader("Content-Length", objFileInfo.Length.ToString());
    Response.ContentType = contentType;
    Response.TransmitFile(objFileInfo.FullName);
    //Response.End();
    HttpContext.Current.ApplicationInstance.CompleteRequest();
}
catch(Exception ex)
{
    ScriptManager.RegisterStartupScript(this.Page, this.GetType(), "MessageAlert", "alert('" + ex.Message + "');", false);
}

Need to show something more, and also specify if you getting any error. — Nad, May 28 '15 at 06:03
Already answered , Check this link http://stackoverflow.com/questions/26796861/download-file-image-button-option-is-not-working-in-updatepanel — Hardik Vinzava, May 28 '15 at 06:31

Genish Parvadia · Answer 1 · 2015-05-28T06:27:00.503

0

check this code.

    long sz = objFileInfo.Length;
    Response.ClearContent();
    Response.AddHeader("Content-Disposition", 
    string.Format("attachment; filename = {0}",System.IO.Path.GetFileName(objFileInfo)));
    Response.AddHeader("Content-Length", sz.ToString("F0"));
    Response.TransmitFile(objFileInfo);
    Response.End();

edited May 28 '15 at 06:27

answered May 28 '15 at 06:13

Genish Parvadia

1,437
3
17
30

score 0 · Answer 2 · answered May 28 '15 at 06:34

0

I think you need to add the following trigger in your UpdatePanel.

<Triggers>
<asp:PostBackTrigger ControlID="Your_Download_Button_ID">
</Triggers>

answered May 28 '15 at 06:34

OKEEngine

888
11
28

File not Downloading in C#

2 Answers2