protected void Button1_Click(object sender, EventArgs e)
    {
        Stream str = FileUpload1.PostedFile.InputStream;
        int len = FileUpload1.PostedFile.ContentLength;
        byte[] byt = new byte[len];
        str.Read(byt, 0, len);

        using (var obj = new DataClassesDataContext())
        {
            var objj = new tblTri();
            objj.Imag = byt;
            objj.Name = TextBox1.Text;
            obj.tblTris.InsertOnSubmit(objj);
            obj.SubmitChanges();
            Image1.ImageUrl = "Handler.ashx?id=" + objj.Id;
        }
    }
 partial void UpdatetblTri(tblTri instance);
 partial void DeletetblTri(tblTri instance);
 partial void InserttblTri(tblTri instance);