在.net后台cs文件中select查询语句前台老说找不到数据源
DataBinding:“System.Data.DataRowView”不包含名为“ui_desc”的属性。 
说明: 执行当前 Web 请求期间，出现未处理的异常。请检查堆栈跟踪信息，以了解有关该错误以及代码中导致错误的出处的详细信息。 

异常详细信息: System.Web.HttpException: DataBinding:“System.Data.DataRowView”不包含名为“ui_desc”的属性。

源错误: 


行 85: <HeaderStyle ForeColor="black" Width="200" />
行 86: <ItemTemplate>
行 87: <asp:Label ID="Label2" runat="server" Text='<%# Bind("ui_desc") %>' />
行 88: </ItemTemplate>
行 89: </asp:TemplateField>
 

源文件: e:\web\oa\yjgl\fajx.aspx 行: 87 

堆栈跟踪: 


[HttpException (0x80004005): DataBinding:“System.Data.DataRowView”不包含名为“ui_desc”的属性。]
  System.Web.UI.DataBinder.GetPropertyValue(Object container, String propName) +197
  System.Web.UI.DataBinder.Eval(Object container, String[] expressionParts) +79
  System.Web.UI.DataBinder.Eval(Object container, String expression) +108
  System.Web.UI.TemplateControl.Eval(String expression) +120
  ASP.oa_yjgl_fajx_aspx.__DataBinding__control24(Object sender, EventArgs e) in e:\web\oa\yjgl\fajx.aspx:87
  System.Web.UI.Control.OnDataBinding(EventArgs e) +99
  System.Web.UI.Control.DataBind(Boolean raiseOnDataBinding) +206
  System.Web.UI.Control.DataBind() +12
  System.Web.UI.Control.DataBindChildren() +216
  System.Web.UI.Control.DataBind(Boolean raiseOnDataBinding) +216
  System.Web.UI.Control.DataBind() +12
  System.Web.UI.Control.DataBindChildren() +216
  System.Web.UI.Control.DataBind(Boolean raiseOnDataBinding) +216
  System.Web.UI.Control.DataBind() +12
  System.Web.UI.WebControls.GridView.CreateRow(Int32 rowIndex, Int32 dataSourceIndex, DataControlRowType rowType, DataControlRowState rowState, Boolean dataBind, Object dataItem, DataControlField[] fields, TableRowCollection rows, PagedDataSource pagedDataSource) +221
  System.Web.UI.WebControls.GridView.CreateChildControls(IEnumerable dataSource, Boolean dataBinding) +2957
  System.Web.UI.WebControls.CompositeDataBoundControl.PerformDataBinding(IEnumerable data) +59
  System.Web.UI.WebControls.GridView.PerformDataBinding(IEnumerable data) +11
  System.Web.UI.WebControls.DataBoundControl.OnDataSourceViewSelectCallback(IEnumerable data) +111
  System.Web.UI.DataSourceView.Select(DataSourceSelectArguments arguments, DataSourceViewSelectCallback callback) +29
  System.Web.UI.WebControls.DataBoundControl.PerformSelect() +149
  System.Web.UI.WebControls.BaseDataBoundControl.DataBind() +70
  System.Web.UI.WebControls.GridView.DataBind() +4
  hkoa.oa.yjgl.fajx.GridViewBind() in D:\we\we\oa\yjgl\fajx.aspx.cs:67
  hkoa.oa.yjgl.fajx.Page_Load(Object Sender, EventArgs E) in D:\we\we\oa\yjgl\fajx.aspx.cs:41
  System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +15
  System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +33
  System.Web.UI.Control.OnLoad(EventArgs e) +99
  System.Web.UI.Control.LoadRecursive() +47
  System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1061

 
  public void GridViewBind()
  {
  string str1 = " fsr='" + Request.Cookies["hyyc"].Values["hyid_carol"].ToString() + "' and lx='f' and scbz='0'";
  //检索未删除、发送类型的当前用户的邮件 
  switch (jsfa.SelectedValue)
  {