创建了以下参数，但没有 WtLang 更新语句中的code>。

The following parameter is created but there is no WtLang in the Update statement.

cmd.Parameters.Add(new OleDbParameter("WtLang", writelangtxt.Text.ToString()));

也许更新语句应如下所示：

Maybe the Update statement should look like this:

String Sql =" UPDATE Activites_tbl SET Read= ?,RdLang= ?,RdMthLang= ?,RdOthrLang= ?,Write= ?,WtLang=?,WtMthLang= ?,WtOthrLang= ?,Speak= ?,SpLang= ?,SpMthLang= ?,SpOthrLang= ?,SportsAct= ?,CurriAct= ?,Hobby= ? WHERE UserName= ?";