Question

I have an upload attachment page in my .NET application. It works fine as long as the uploaded file is smaller than 4 MB. How do I set the size of uploaded file? I’d like to set the limitation to be less than 8 MB. And if the file is larger than 8 MB, the upload process will be determined.

This is my code in the backend. File1 is the upload controler.

protected void ImageButton1_Click(object sender, ImageClickEventArgs e)
{
    if ((File1.PostedFile != null) && (File1.PostedFile.ContentLength > 0))
    {
        string name=ViewState["UserName"].ToString();
        string fn = System.IO.Path.GetFileName(File1.PostedFile.FileName);
        string extension = Path.GetExtension(File1.PostedFile.FileName);
        if (extension == "")
            return;
        DirectoryInfo di = new DirectoryInfo(Server.MapPath("~/Attachments/" + name));
        FileInfo[] rgFiles = di.GetFiles("*.*");
        foreach (FileInfo fi in rgFiles)
        {
            if (fi.Name.Equals(fn))
            {
                ShowMessage(this, "This file name already exists, please check the list.");
                return;
            }
        }
        string SaveLocation = Server.MapPath("~/Attachments/" + name + "/" + fn);
        try
        {
            File1.PostedFile.SaveAs(SaveLocation);
            ShowMessage(this,"The file has been uploaded.");
        }
        catch (Exception ex)
        {

            ShowMessage(this,"Error" + ex.Message);
        }
        GetList();
    }
    else
    {
        ShowMessage(this,"Please choose one file");
    }
}

Answer 1

<configuration>   
  <system.web>     
       <httpRuntime maxRequestLength="8000" />   
  </system.web> 
 </configuration>