C# การ INSERT ข้อมูล ลงใน 2 ตาราง โดยมีเงื่อนไขด้วยครับ

protected void myDataGrid_ItemCommand(object source, DataGridCommandEventArgs e)
        {
            if (e.CommandName == "Add")
            {
                TextBox txtIDArt = (TextBox)e.Item.FindControl("txtAddIDArt");
                TextBox txtNameArt = (TextBox)e.Item.FindControl("txtAddNameArt");
                TextBox txtDetail = (TextBox)e.Item.FindControl("txtAddDetail");
                TextBox txtPathImage = (TextBox)e.Item.FindControl("txtAddPathImage");

                strSQL = "INSERT INTO art_and_culture (id_art, name_art, detail) VALUES ('" + txtIDArt.Text + "', '" + txtNameArt.Text + "','" + txtDetail.Text + "')";
                strSQL = "INSERT INTO art_image (id_image_art, path_image_art, id_art) VALUES (NULL,'"+txtPathImage.Text+"','"+txtIDArt+"')";
                objCmd = new MySqlCommand(strSQL, objConn);
                objCmd.ExecuteNonQuery();

                BindData();
            }
        }