如何才能爲Telerik RadGrid GridClientSelectColumn只爲選定的行獲得總和聚合？

Question

我是Telerik庫的新手，我的第一個任務之一是獲取Telerik RadGrid的數值列中的所有值。該列是一個GridClientSelectColumn。我明白，通過設置Aggregate =「Sum」，頁腳將讀取該列的總和。問題是我只想要總和選定的行。有人可以提供演示嗎？先謝謝你！

Answer 1

請檢查以下代碼段。

注意：如果您想通過datakey的標籤位置來做下面的事情，那麼請檢查this鏈接。

JS代碼

<telerik:RadCodeBlock ID="RadCodeBlock" runat="server"> 
    <script type="text/javascript"> 
     function RowSelected(sender, args) { 

      var grid = $find("<%=RadGrid1.ClientID %>"); 

      var totalAmount = 0; 

      if (grid) { 
       var MasterTable = grid.get_masterTableView(); 
       var Rows = MasterTable.get_dataItems(); 
       for (var i = 0; i < Rows.length; i++) { 
        var row = Rows[i]; 
        if (row.get_selected() == true) { 

         totalAmount = totalAmount + parseFloat(row.getDataKeyValue("ID")); 
        } 
       } 
      } 

      if ($("span[id$='myFooter']").length > 0) { 
       $("span[id$='myFooter']").get(0).innerHTML = "sum is : " + totalAmount; 
      } 
     } 
    </script> 
</telerik:RadCodeBlock> 

的.aspx

<telerik:RadGrid ID="RadGrid1" runat="server" AutoGenerateColumns="false" OnNeedDataSource="RadGrid1_NeedDataSource" 
     ShowFooter="true" AllowMultiRowSelection="true"> 
     <MasterTableView ClientDataKeyNames="ID"> 
      <Columns> 
       <telerik:GridClientSelectColumn UniqueName="columnSelect"> 
       </telerik:GridClientSelectColumn> 
       <telerik:GridTemplateColumn DataField="ID" HeaderText="ID" UniqueName="ID"> 
        <ItemTemplate> 
         <asp:Label ID="txtID" runat="server" Text='<%# Eval("ID") %>'></asp:Label> 
        </ItemTemplate> 
        <FooterTemplate> 
         <asp:Label ID="myFooter" runat="server" Text="sum is : 0"></asp:Label> 
        </FooterTemplate> 
       </telerik:GridTemplateColumn> 
      </Columns> 
     </MasterTableView> 
     <ClientSettings> 
      <Selecting AllowRowSelect="true" /> 
      <ClientEvents OnRowSelected="RowSelected" OnRowDeselected="RowSelected" /> 
     </ClientSettings> 
    </telerik:RadGrid> 

.aspx.cs

protected void RadGrid1_NeedDataSource(object sender, GridNeedDataSourceEventArgs e) 
{ 
    DateTime dt = DateTime.Now; 

    dynamic data = new[] { 
      new { ID = 1, Name ="Name_1", customdate=dt,NO = 11.00}, 
      new { ID = 2, Name = "Name2", customdate=dt,NO = 11.00}, 
      new { ID = 3, Name = "Name3", customdate=dt,NO = 11.00}, 
      new { ID = 4, Name = "Name4", customdate=dt,NO = 11.44}, 
      new { ID = 5, Name = "Name5", customdate=dt,NO = 10.4} 
     }; 

    RadGrid1.DataSource = data; 
}