Question

here is my image width and size code which is work perfectly but problem is that when i pass null fileupload it give me error ‘argument not valid ‘ but i want pass null value also how will i do

HttpPostedFile fil = this.FileUp.PostedFile;
                 System.Drawing.Image uploadimage = System.Drawing.Image.FromStream(fil.InputStream);
                 if (uploadimage.Height > 155 || uploadimage.Width > 124)
                 {
                     lblErrorMsg.Visible = true;
                     lblErrorMsg.Text = "<font class='orange'>Height and width not accpetable</font>";
                     return;

                 }

Answer 1

then check the HasFile property of the FileUpload control before continuing…

if (this.FileUp.PostedFile.HasFile)
{
  // continue...
}

check here: FileUpload.HasFile Property