OnClientColumn client events C1GridView 2025v2 399

OnClientColumn client events C1GridView 2025v2 399

Posted by: enrique.pv-ext on 7 May 2026, 9:58 am EST

• 

  enrique.pv-ext

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  Posted 7 May 2026, 9:58 am EST - Updated 7 May 2026, 10:00 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

  using C1.Web.Wijmo.Controls.C1GridView;

  When use OnClientColumn events javascript ?

      ClientSelectionMode="SingleRow"
      OnClientSelectionChanged="C1GridView1_OnClientSelectionChanged"
      OnClientColumnGrouping="C1GridView1_OnClientColumnGrouping"
      OnClientColumnGrouped="C1GridView1_OnClientColumnGrouped"
      OnClientColumnUngrouped="C1GridView1_OnClientColumnUngrouped"

  Javascript

      var collectionReportsGroupedCount = 0;
      function C1GridView1_OnClientColumnGrouping(s, e) {
          if (collectionReportsGroupedCount >= 1) {
              if (e && typeof e.set_cancel === "function") {
                  e.set_cancel(true);
              }
              showSingleGroupingWarningClient();
              return false;
          }
          return true;
      }
  
      function C1GridView1_OnClientColumnGrouped(s, e) {
          collectionReportsGroupedCount = 1;
      }
  
      function C1GridView1_OnClientColumnUngrouped(s, e) {
          collectionReportsGroupedCount = 0;
      }

  Any suggestions ?

• 

  akshay.rajput

  

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  Posted 8 May 2026, 4:51 am EST

  Hi,

  As I can see from the documentation there is no OnClientColumnGrouped and OnClientColumnUnGrouped event.

  • https://developer.mescius.com/componentone/docs/webforms/online-upload/C1.Web.Wijmo.Controls.45~C1.Web.Wijmo.Controls.C1GridView.C1GridView_members.html

  Please let me know what documentation you are referring to where these events are listed, so we can get that corrected.

  As per the documentation, there are only OnClientColumnGrouping & OnClientColumnUngrouping client-side events, which seem to be working fine on my side.

  You can use these events to perform client-side actions or manage state within your application.

  Regards,

  Akshay

• 

  enrique.pv-ext

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  Posted 8 May 2026, 5:18 am EST

  Sorry, your’re right, client-side events are:

  OnClientColumnDragged A function called when column dragging has been started.

  OnClientColumnDragging A function called when column dragging is started, but before wijgrid handles the operation. Cancellable.

  OnClientColumnDropping A function called when column is dropped, but before wijgrid handles the operation. Cancellable.

  OnClientColumnGrouping A function called when column is dropped into the group area, but before wijgrid handles the operation. Cancellable.

  OnClientColumnUngrouping A function called when column is removed from the group area, but before wijgrid handles the operation. Cancellable.

  OnClientSelectionChanged="C1GridView1_OnClientSelectionChanged"
  OnClientColumnGrouping="C1GridView1_OnClientColumnGrouping"
  OnClientColumnUngrouping="C1GridView1_OnClientColumnUngrouping"

  I try ?

      function getCurrentGroupedCount() {
          var grid = $("#<%= C1GridView1.ClientID %>");
          return grid.find(".wijmo-wijgrid-groupheader").length;
      }
      function C1GridView1_OnClientColumnGrouping(s, e) {
          var groupedCount = getCurrentGroupedCount();
          if (groupedCount >= 1) {
              if (e && typeof e.set_cancel === "function") {
                  e.set_cancel(true);
              }
              if (typeof showSingleGroupingWarningClient === "function") {
                  showSingleGroupingWarningClient();
              }
              return false;
          }
          return true;
      }
  
      function C1GridView1_OnClientColumnUngrouping(s, e) {
          return true;
      }

  and samples using

  OnClientColumnDragged
  
  OnClientColumnDragging
  
  OnClientColumnDropping

  thanks in advanced, any help very high appreciated?

• 

  akshay.rajput

  

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  Posted 11 May 2026, 2:25 am EST

  Hi,

  I tried to run your code; however, getCurrentGroupedCount is always returning 0 for me.
  
  You may refer to the following code to get the Group Count.

  <script>
      function C1GridView1_OnClientColumnGrouping(s, e) {
  
          var gridElement = s.target;
          var $grid = $(gridElement);
          var widget = $grid.data("wijmo-c1gridview") || $grid.data("wijmo-wijgrid") || $grid.data("wijgrid");
          console.log($grid)
          if (widget && widget.options && widget.options.columns) {
              var groupedCount = 0;
              var cols = widget.options.columns;
  
              // Count columns that currently have an active group position
              for (var i = 0; i < cols.length; i++) {
                  var gInfo = cols[i].groupInfo;
                  if (gInfo && gInfo.position) {
                      var pos = gInfo.position.toString().toLowerCase();
                      if (pos !== "none" && pos !== "0") {
                          groupedCount++;
                      }
                  }
              }
  
              // If 1 or more columns are already grouped, block the action and show alert
              if (groupedCount >= 1) {
                  alert("Grouping is limited to 1 column at a time.");
  
                  // Cancel the ASP.NET AJAX grouping event
                  if (e && typeof e.set_cancel === "function") {
                      e.set_cancel(true);
                  }
                  return false;
              }
          }
      }
      </script>
  

  >> samples using OnClientColumnDragged OnClientColumnDragging OnClientColumnDropping

  Since this is a new query, please create a separate case for this.