C#:SQL FilterExpression - 缺少操作数异常

Question

我正在关注此处列出的可搜索网格视图代码.我在使用时遇到了麻烦FilterExpression.我得到了例外:

'Name'运算符后缺少操作数...当异常发生时,FilterExpression ="WHERE Name like'spencer%'"

以下代码中发生异常:

protected void BindSGVData()
        {
            //hfSearchText has the search string returned from the grid.
            if (hfSearchText.Value != "")
            {
                RidesSQL.FilterExpression = " WHERE " + hfSearchText.Value; //EXCEPTION HERE!
            }
            DataView dv = (DataView)RidesSQL.Select(new DataSourceSelectArguments());
            //hfSort has the sort string returned from the grid.
            if (hfSort.Value != "")
            {
                dv.Sort = hfSort.Value;
            }

            RideSGV.DataSource = dv;
            try
            {
                RideSGV.DataBind();
            }
            catch (Exception exp)
            {
                //If databinding threw exception bcoz current page index is > than available page index
                RideSGV.PageIndex = 0;
                RideSGV.DataBind();
            }
            finally
            {
                //Select the first row returned
                if (RideSGV.Rows.Count > 0)
                    RideSGV.SelectedIndex = 0;
            }
        }

有什么想法吗？

Answer 1

RidesSQL.FilterExpression = " WHERE " + hfSearchText.Value; //EXCEPTION HERE!

应该:

RidesSQL.FilterExpression = hfSearchText.Value; // NO EXCEPTION HERE!