GroupAggregate and C1GroupTextEventArgs for C1GridView 2025v2 399

GroupAggregate and C1GroupTextEventArgs for C1GridView 2025v2 399

Posted by: enrique.pv-ext on 9 January 2026, 7:33 am EST

• 

  enrique.pv-ext

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  Posted 9 January 2026, 7:33 am EST

  Hi,

  Migrate from 2010v1 to 2025v2 399 in ASP.NET WebForms NET Framework 4.8.1.

  Using C1GridView from C1.Web.Wijmo.Controls.48.dll

  Error about OnGroupAggregate=“CashBreakDownGrid_GroupAggregate” and C1GroupTextEventArgs class.

  My markup code:

      <cc1:C1GridView ID="CashBreakDownGrid" runat="server" 
          AutoGenerateColumns="False"                 
          UseEmbeddedVisualStyles = "false"
          VisualStylePath="~/VisualStyles" 
          VisualStyle="Vista"
          DataKeyNames="ID, VALUE, TIMESTAMP"
          OnGroupAggregate="CashBreakDownGrid_GroupAggregate"
          Width="100%" 
          OnRowDataBound="CashBreakDownGrid_RowDataBound" 
          EmptyDataText="No hay datos"
          ClientIDMode="AutoID" >
          <Columns>

  My code server backend, using Group AGgreate for Calculates de total sum and binds it to the grid.
  
  C1GroupTextEventArgs not exixts.

    protected void CashBreakDownGrid_GroupAggregate(object sender, C1GroupTextEventArgs e)
    {
        Thread.CurrentThread.CurrentCulture = Util.GetCulture();
        decimal sum = 0;
        for (int i = e.StartItemIndex; i <= e.EndItemIndex; i++)
        {
            string s = ((Label)((C1GridView)sender).Rows[i].Cells[0].FindControl("lblAmount")).Text;
            decimal val;
            decimal.TryParse(s, System.Globalization.NumberStyles.Any, null, out val);
            sum += val;
        }
  
        string currencySymbol = "<span style='max-width:85px;display:inline-block;overflow:hidden'>" + Util.GetCulture().NumberFormat.CurrencySymbol + "</span>&nbsp;";
        e.Text = currencySymbol + "<span style='max-width:85px;display:inline-block;overflow:hidden' id=\"" + this.ClientID + "_CashBreakDownGridTotal\">" + string.Format("{0:N}", sum) + "</span>";
  
        txtCashBreakDownTotal.Text = sum.ToString("N", new CultureInfo("en-US"));
    }

  Any suggestions about GroupAggreate ?

• 

  aastha.gupta

  

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  Posted 12 January 2026, 8:11 am EST

  Hi,

  You can explore ‘OnClientGroupAggregate’ function in the C1GridView API for this purpose: https://developer.mescius.com/componentone/docs/webforms/online-gridview/C1.Web.Wijmo.Controls.45~C1.Web.Wijmo.Controls.C1GridView.C1GridView~OnClientGroupAggregate.html

  In case you still have doubts, then please share a small sample application that shows the issue.

  Please note that ASP.NET WebForms is now considered a legacy platform, and there is no active development ongoing for it. Additionally, you are upgrading from a very old version, which typically requires reimplementing several features from scratch.

  Therefore, we strongly recommend considering a migration to ASP.NET MVC to take advantage of the latest features, improvements, and full product support.

  You can refer to the following documentation for more details:

  https://developer.mescius.com/componentone/docs/mvc/online-mvc/overview

  Thanks for your understanding.

  Kind Regards,

  Aastha

• 

  enrique.pv-ext

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  Posted 14 January 2026, 12:07 pm EST

  I try prepare a sample with the issue for GridView + Grouping and footer Total row

  migration to ASP.NET MVC not possible now, time and money in the company, not available for migrations
  
  thanks

• 

  uttkarsh.matiyal

  

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  Posted 15 January 2026, 8:38 am EST

  Hello Enrique,

  There is no OnGroupAggregate server event in latest version. Instead, you’ll need to use the OnClientGroupAggregate client side event as follows:

  *.aspx.cs:

  public string CurrencySymbolHtml { get; set; }
  
  protected void Page_Load(object sender, EventArgs e)
  {
      // Get the culture-specific symbol and wrap it in HTML
      // Using System.Globalization.CultureInfo.CurrentCulture or your Util.GetCulture()
      var culture = System.Globalization.CultureInfo.CurrentCulture;
      string symbol = culture.NumberFormat.CurrencySymbol;
  
      // your <span> formatting
      CurrencySymbolHtml = $"<span style=\"max-width:85px;display:inline-block;overflow:hidden\">{symbol}</span>&nbsp;";
  
      if (!IsPostBack)
      {
          BindGrid();
      }
  }

  *.aspx:

  <script>
      // Pull the C# property into a global JS variable
      const CurrencySymbol = '<%= CurrencySymbolHtml %>';
  
      function OnClientGroupAggregate(sender, e) {
          //equivalent of your implementation
          let sum = 0;
          for (let i = e.groupingStart; i <= e.groupingEnd; i++) {
              let dataRows = e.data;
              sum += dataRows[i].valueCell(1).value;
          }
          console.log(sum);
  
          let formattedSum = sum.toLocaleString('en-US', {
              minimumFractionDigits: 2,
              maximumFractionDigits: 2
          });
  
          // Set the header text using the injected symbol
          e.text = CurrencySymbol +
              "<span style='max-width:85px;display:inline-block;overflow:hidden' id='" +
              sender.id + "_Total'>" + formattedSum + "</span>";
      }
  </script>
  
  <wijmo:C1GridView ID="C1GridView1" runat="server"
      ....
      OnClientGroupAggregate="OnClientGroupAggregate">
  
      <Columns>
          ....
      </Columns>
  </wijmo:C1GridView>

  Note that OnClientGroupAggregate works for the columns that have their Aggregate property set as Custom.

  Please refer to the attached sample for the implementation. (see GridView_Grouping.zip)

  Regards,
  
  Uttkarsh.