Sys.WebForms.PageRequestManagerServerErrorException：无效的列名称：

Question

我在我的一个项目中创建动态网格。我在Page_Init方法中添加了网格代码。通常我会使用按预期工作的绑定列或模板列。 下面是代码：

protected void Page_Init(object source, System.EventArgs e) 
{ 
    if (Session["colnames"] != null) 
    { 
     List<CommanIdTitle> CategoryIdTitle = new List<CommanIdTitle>(); 
     MainSubCategory CateMarks = (MainSubCategory)Session["colnames"]; 
     GridBoundColumn boundColumn_StudentId; 
     boundColumn_StudentId = new GridBoundColumn(); 
     boundColumn_StudentId.DataField = "StudentId"; 
     boundColumn_StudentId.HeaderText = "Student Id"; 
     boundColumn_StudentId.UniqueName = "StudentId"; 
     boundColumn_StudentId.AllowFiltering = false; 
     boundColumn_StudentId.Display = false; 
     Grid_CategoryMarks.MasterTableView.Columns.Add(boundColumn_StudentId); 

     GridBoundColumn boundColumn_StudentName; 
     boundColumn_StudentName = new GridBoundColumn(); 
     boundColumn_StudentName.DataField = "StudnetName"; 
     boundColumn_StudentName.HeaderText = "Student Name"; 
     boundColumn_StudentName.UniqueName = "StudentName"; 
     boundColumn_StudentName.AllowFiltering = false; 

     Grid_CategoryMarks.MasterTableView.Columns.Add(boundColumn_StudentName); 

     GridTemplateColumn templateColumn_AverageFinal; 
     templateColumn_AverageFinal = new GridTemplateColumn(); 
     templateColumn_AverageFinal.ItemTemplate = new MyTemplate2("0"); 
     templateColumn_AverageFinal.UniqueName = "Average"; 
     templateColumn_AverageFinal.HeaderText = "Test"; 
     templateColumn_AverageFinal.HeaderStyle.HorizontalAlign = HorizontalAlign.Center; 
     templateColumn_AverageFinal.AllowFiltering = false; 
     templateColumn_AverageFinal.ReadOnly = true; 
     Grid_CategoryMarks.MasterTableView.Columns.Add(templateColumn_AverageFinal); 
    } 
} 

但现在的新规定是将一些本列。所以我加了GridGroupColumn。

这里是新代码：

protected void Page_Init(object source, System.EventArgs e) 
{ 
    if (Session["colnames"] != null) 
    { 
     List<CommanIdTitle> CategoryIdTitle = new List<CommanIdTitle>(); 
     MainSubCategory CateMarks = (MainSubCategory)Session["colnames"]; 
     GridBoundColumn boundColumn_StudentId; 
     boundColumn_StudentId = new GridBoundColumn(); 
     boundColumn_StudentId.DataField = "StudentId"; 
     boundColumn_StudentId.HeaderText = "Student Id"; 
     boundColumn_StudentId.UniqueName = "StudentId"; 
     boundColumn_StudentId.AllowFiltering = false; 
     boundColumn_StudentId.Display = false; 
     Grid_CategoryMarks.MasterTableView.Columns.Add(boundColumn_StudentId); 

     GridBoundColumn boundColumn_StudentName; 
     boundColumn_StudentName = new GridBoundColumn(); 
     boundColumn_StudentName.DataField = "StudnetName"; 
     boundColumn_StudentName.HeaderText = "Student Name"; 
     boundColumn_StudentName.UniqueName = "StudentName"; 
     boundColumn_StudentName.AllowFiltering = false; 
     Grid_CategoryMarks.MasterTableView.Columns.Add(boundColumn_StudentName); 

     /*This code throws error*/ 
     GridColumnGroup groupHeaderFinal = new GridColumnGroup(); 
     groupHeaderFinal.Name = "TotalAveragePerTerm"; 
     groupHeaderFinal.HeaderText = "Total Average Per Term"; 
     groupHeaderFinal.HeaderStyle.HorizontalAlign = HorizontalAlign.Center; 
     Grid_CategoryMarks.MasterTableView.ColumnGroups.Add(groupHeaderFinal); 

     GridTemplateColumn templateColumn_AverageFinal; 
     templateColumn_AverageFinal = new GridTemplateColumn(); 
     templateColumn_AverageFinal.ItemTemplate = new MyTemplate2("0"); 
     templateColumn_AverageFinal.UniqueName = "Average"; 
     templateColumn_AverageFinal.HeaderText = ""; 
     templateColumn_AverageFinal.ColumnGroupName = "TotalAveragePerTerm"; 
     templateColumn_AverageFinal.HeaderStyle.HorizontalAlign = HorizontalAlign.Center; 
     templateColumn_AverageFinal.AllowFiltering = false; 
     templateColumn_AverageFinal.ReadOnly = true; 
     Grid_CategoryMarks.MasterTableView.Columns.Add(templateColumn_AverageFinal); 
    } 
} 

当我加入这个任何回发时发生错误

Sys.WebForms.PageRequestManagerServerErrorException：无效的列名：

我找到的一个解决方案是设置网格的EnableViewState = False。但如果我这样做，viewstate不会维护和网格崩溃，并且所有数据都将丢失。

这是我设计的代码

<telerik:RadGrid ID="Grid_CategoryMarks" runat="server" EnableViewState="true" 
     AllowFilteringByColumn="True" AllowSorting="True" 
     ShowGroupPanel="false" AutoGenerateColumns="False" PageSize="10" 
     ShowStatusBar="true" OnNeedDataSource="Grid_CategoryMarks_NeedDataSource" OnItemDataBound="Grid_CategoryMarks_ItemDataBound" 
     ShowFooter="True" FilterItemStyle-HorizontalAlign="Left"> 
    <ClientSettings AllowDragToGroup="True"> 
     <Selecting AllowRowSelect="false" UseClientSelectColumnOnly="true"/> 
     <Scrolling AllowScroll="true" UseStaticHeaders="true" SaveScrollPosition="true"/> 
    </ClientSettings> 
    <MasterTableView AutoGenerateColumns="false" > 
     <NoRecordsTemplate> 
      <asp:Label ID="lbl_rec_msg" runat="server" Text="No record exist"></asp:Label> 
     </NoRecordsTemplate> 
    </MasterTableView> 
</telerik:RadGrid> 

Answer 1

我遇到了类似的问题。问题在于你已经在设计中定义了网格，并且在page_init方法中再次创建了该网格。

从设计中删除它，并尝试从后面的代码创建。所以每次创建新的时刻。