以編程方式從RadGrid中刪除標題上下文菜單過濾器

Question

我有一箇中繼器，我已經綁定到過濾列名稱，因爲它們已應用（當前使用會話，我可能會更改此循環以遍歷列尋找現在過濾器，我真的知道如何網格工作）。

我在每個過濾列名旁邊都有一個按鈕，用於從RadGrid中刪除過濾器。

 <asp:Repeater ID="repCorpFilters" runat="server" OnItemCommand="repFilters_ItemCommand"> 
      <HeaderTemplate> 
       Current Filters: 
      </HeaderTemplate> 
      <ItemTemplate> 
       <asp:ImageButton runat="server" CommandName="removefilter" CommandArgument="corp" ImageUrl="../images/Delete.gif" /> 
       <asp:literal ID="litFilter" runat="server" Text='<%#Container.DataItem() %>' /> 
      </ItemTemplate> 
      <SeparatorTemplate> 
       , 
      </SeparatorTemplate> 
     </asp:Repeater> 


Protected Sub repFilters_ItemCommand(ByVal source As Object, ByVal e As System.Web.UI.WebControls.RepeaterCommandEventArgs) 
    Select Case e.CommandName 
     Case "removefilter" 
      BindGrid(DirectCast([Enum].Parse(GetType(products), e.CommandArgument), products), Nothing, _ 
        CType(e.Item.FindControl("litFilter"), Literal).Text) 
    End Select 
End Sub 


Private Sub BindGrid(ByVal prod As products, Optional ByVal cusipFilter As String = Nothing, Optional ByVal strRemoveFilter As String = Nothing) 
    Dim dvCorp As DataView = CachedPartialCorp() 
    If Not IsNothing(cusipFilter) Then 
     isCusipFiltered = True 
     dvCorp.RowFilter = "CUSIP IN " & cusipFilter 
    End If 

    If Not IsNothing(strRemoveFilter) Then 
     Dim filters As List(Of String) = RemoveFilter("partialCorpFilters", strRemoveFilter) 

     If filters.Count = 0 Then 
      repCorpFilters.Visible = False 
     Else 
      repCorpFilters.DataSource = filters 
      repCorpFilters.DataBind() 
     End If 

     For Each gc As GridColumn In dtgCorp.MasterTableView.Columns 
      With gc 
       If .IsBoundToFieldName(strRemoveFilter) Then 
        .CurrentFilterFunction = GridKnownFunction.NoFilter 
        .CurrentFilterValue = "" 
        .AndCurrentFilterFunction = GridKnownFunction.NoFilter 
        .AndCurrentFilterValue = "" 
       End If 
      End With 
     Next 
    End If 

    dtgCorp.DataSource = dvCorp 
    dtgCorp.DataBind() 
End Sub 

一切工作正常，除從RadGrid實際刪除過濾器。在我通過列循環並找到正在嘗試刪除的過濾器的列時，我重置了過濾器下拉列表和值，這很好用！我可以右鍵單擊標題項目，並且過濾器顯示不被過濾。但數據保持過濾！我如何讓RadGrid根據選定的過濾器重新評估其新的過濾值？

代碼我感到的多汁位是在這裏：

 For Each gc As GridColumn In dtgCorp.MasterTableView.Columns 
      With gc 
       If .IsBoundToFieldName(strRemoveFilter) Then 
        .CurrentFilterFunction = GridKnownFunction.NoFilter 
        .CurrentFilterValue = "" 
        .AndCurrentFilterFunction = GridKnownFunction.NoFilter 
        .AndCurrentFilterValue = "" 
       End If 
      End With 
     Next 
    End If 

    dtgCorp.DataSource = dvCorp 
    dtgCorp.DataBind() 

Answer 1

 For Each gc As GridColumn In dtg.MasterTableView.Columns 
      With gc 
       If .IsBoundToFieldName(strRemoveFilter) Then 
        dtg.MasterTableView.GetItems(GridItemType.FilteringItem)(0).FireCommandEvent(RadGrid.HeaderContextMenuFilterCommandName, _ 
         New Triplet(strRemoveFilter, New Pair("NoFilter", ""), New Pair("NoFilter", ""))) 
       End If 
      End With 
     Next 

這是我曾嘗試重新綁定（）方法，終於做到了代碼:)

Answer 2

您是否嘗試過使用NeedDataSource網格結合，而不是用的DataBind（）調用結合？在這種情況下，只需調用網格的Rebind（）方法即可清除過濾器值。另請參閱如何清除this demo上的過濾器。

迪克