为什么ExecuteNonQuery执行成功了返回1，但Access还是没有被更新？
按钮程序如下：
    protected void Button1_Click(object sender, EventArgs e)
    {
        strSQL = "update config set grade_name=@GradeName,grade_year=@GradeYear,xuenian=@xuenian,xueqi=@xueqi,Dormitory=@Dormitory,xueke=@xueke,ke=@ke,";
        strSQL += "stStatus=@stStatus,haveStPhoto=@haveStPhoto,zhidu=@zhidu";
        OleDbParameter[] parameters = {
            new OleDbParameter("@GradeName", OleDbType.VarChar,200),
            new OleDbParameter("@GradeYear", OleDbType.VarChar,200),
            new OleDbParameter("@xuenian", OleDbType.VarChar,10),
            new OleDbParameter("@xueqi", OleDbType.VarChar,10),
            new OleDbParameter("@Dormitory", OleDbType.VarChar,100),
            new OleDbParameter("@xueke", OleDbType.VarChar,100),
            new OleDbParameter("@ke", OleDbType.VarChar,255),
            new OleDbParameter("@stStatus", OleDbType.VarChar,200),
            new OleDbParameter("@haveStPhoto", OleDbType.Boolean,2),
            new OleDbParameter("@zhidu", OleDbType.LongVarChar,5000),
        };

        parameters[0].Value = txbGradeName.Text;
        parameters[1].Value = txbGradeYear.Text;
        parameters[2].Value = ddlXuenian.SelectedValue;
        parameters[3].Value = ddlXueqi.SelectedValue;
        parameters[4].Value = txbDormitory.Text;
        parameters[5].Value = txbXueke.Text;
        parameters[6].Value = txbKe.Text;
        parameters[7].Value = txbStStatus.Text;
        if (rblStPhoto.SelectedValue == "True")
            parameters[8].Value = true;
        else
            parameters[8].Value = false;
        parameters[9].Value = Request.Form["content1"];
        int cmdResult = GetExcuteNonQuery(strSQL, parameters);
        if (cmdResult == 1)
            MsgBox("修改成功！", "Config.aspx");
    }

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GetExcuteNonQuery（）的程序如下：

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