hello i want to file attach only specific format and restrict size on file and also remove file option. how its possible.?
i used uploadfile control of asp.net but remove file option and size of file not there..
kindly tell me how can do this.
advance thanks...

There is no option like fileopendialog control to restrict the user to select specified format of file.

but you can do it like

I used on fileupload, button and label control for zip formate and file size less than 4 MB

 protected void Button1_Click(object sender, EventArgs e)
    {
        if (FileUpload1.HasFile == true)
        {
            if (FileUpload1.FileName.Contains(".zip") == true)
            {
                if (FileUpload1.PostedFile.ContentLength / 1048576 <= 4)
                {
                    FileUpload1.SaveAs(Server.MapPath("~/" + FileUpload1.FileName));
                    Label1.Text = "";
                }
                else
                {
                    Label1.Text = "File size can't exceed 4 MB";
                }
                Label1.Text = "";
            }
            else
            {
                Label1.Text = "File Must be in Zip format";
            }


        }
    }