Grouping in C1GridView 2025v2 399

Posted by: enrique.pv-ext on 5 May 2026, 3:32 am EST

enrique.pv-ext

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Posted 5 May 2026, 3:32 am EST - Updated 5 May 2026, 3:56 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

Dont exists properties AllowGrouping, GroupingStyle-Height, GroupByCaption, GroupingStyle-BackColor and event OnGroupColumnMoved

GroupAreaVisible property does not exists.

My markup OLD code:

 AllowGrouping="true" 
 GroupingStyle-Height="20" 
 GroupByCaption='<%# (string)_textsShown[150] %>'
 GroupingStyle-BackColor="Transparent"

OnGroupColumnMoved="C1GridView1_GroupColumnMoved"

Not exists OnGroupColumnMoved

Legacy spaguetti code 2010v1 version:

    protected void C1GridView1_GroupColumnMoved(object sender, C1GridViewColumnMoveEventArgs e)
    {
  if (C1GridView1.GroupedColumns.Count == 0)
  {
      #region Without grouping fields

      //Save old filters 
      Object[] b = new Object[C1GridView1.Columns.Count];
      C1BaseFieldCollection col = C1GridView1.Columns;
      col.CopyTo(b, 0);

      //Reconfigure grid structure
      C1GridView1.Columns.Clear();
      ConfigureGridViewColumns(int.Parse(Session["reportID"].ToString()));

      //Apply filters
      for (int i = 0; i < C1GridView1.Columns.Count; i++)
      {
          for (int j = 0; j < b.Length; j++)
          {
              if (C1GridView1.Columns[i].GetType() == typeof(C1BoundField))
              {
                  if (((C1BoundField)C1GridView1.Columns[i]).DataField == ((C1BoundField)b[j]).DataField)
                  {
                      ((C1BoundField)C1GridView1.Columns[i]).FilterValue = ((C1BoundField)b[j]).FilterValue;
                      break;
                  }
              }
          }
      }

      //Get datasource of grid
      C1GridView1.DataSource = Web.Util.GetGridFilterByFieldType(C1GridView1, _dataSources.Tables[0], GetConfigurationParameter(ConfigurationParamType.DefaultDatetimeFormatString), null);
      C1GridView1.DataBind();
      #endregion
  }
  else
  {
      #region Add or change grouping field
      //Grouping field
      C1BoundField fieldGroupBy = (C1BoundField)(((C1.Web.Wijmo.Controls.C1GridView.C1GridViewColumnMovedEventArgs)(e)).Column);

      if (C1GridView1.GroupedColumns.Count > 1)
      {
          //If there are two grouping fields, then delete and add only last grouping field selected
          C1GridView1.GroupedColumns.Clear();
          C1GridView1.GroupedColumns.Add(fieldGroupBy);
      }

      //Apply order by grouping field
      C1.Web.Wijmo.Controls.C1GridView.C1GridViewSortEventArgs s = new C1GridViewSortEventArgs(((C1BoundField)fieldGroupBy).SortExpression, ((C1BoundField)fieldGroupBy).SortDirection);
      C1GridView1.DataBind();
      C1GridView1_Sorting(C1GridView1, s);
      #endregion
  }

New events in 2025v2:

  OnColumnGrouped="C1GridView1_ColumnGrouped"
  OnColumnGrouping="C1GridView1_ColumnGrouping"
  OnColumnUngrouped="C1GridView1_ColumnUngrouped"
  OnColumnUngrouping="C1GridView1_ColumnUngrouping"
  OnColumnMoved="C1GridView1_ColumnMoved"
  OnColumnMoving="C1GridView1_ColumnMoving"

GroupInfo new 2025v2:

var col = (C1BoundField)C1GridView1.Columns[0]; 
 
// 2025v2 Grouping Logic 
col.GroupInfo.GroupSingleRow = false; 
col.GroupInfo.Position = GroupPosition.Header;  
col.GroupInfo.OutlineMode = OutlineMode.StartExpanded;

Grouping in 2010v1 working, dragging column in “area”, and then grouping by the column.

Gridview without not columns for group

Gridview with a column for Group:

Gridview with a ANOTHER column for Group:

Only ONE column for grouping.

alternatives for use grouping in 2025v2 ?

full sample using too OnColumnGrouped, OnColumnGrouping, OnColumnUngrouped,

OnColumnUngrouping ?

thanks all!

akshay.rajput
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Posted 5 May 2026, 8:07 am EST

Hi Kiquenet,

We are working on your query and will get back to you as soon as possible.

Regards,

Akshay
akshay.rajput
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Posted 6 May 2026, 2:00 am EST
Hi Kiquenet,

It seems like you have already found alternatives for almost all the properties you have mentioned above. Please refer to the attached sample.

As for the GroupingStyle, I would suggest you to use the following CSS to set the Group header style and height

<style> .wijmo-wijgrid-groupheaderrow{ background-color:aquamarine; height:100px; } </style>

Regards,

AkshayC1WebForms_GridView.zip

enrique.pv-ext

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Posted 6 May 2026, 5:06 am EST - Updated 6 May 2026, 5:11 am EST

Thanks all!

I try it

I get this:

I want ONLY ONE Column for Grouping, not 2 or more.

Please, questions about it:

What is ShowRowHeader

Why CallbackSettings-Action=“All” ?

Is Required ClientSelectionMode??

Is required OnClientSelectionChanged ?

    ShowRowHeader="true" ShowGroupArea="true"
    GroupAreaCaption="Drag and drop fields here"
    CallbackSettings-Action="All"
    ClientSelectionMode="SingleRow" OnClientSelectionChanged="C1GridView1_OnClientSelectionChanged"
    OnColumnGrouped="C1GridView1_ColumnGrouped" OnColumnMoved="C1GridView1_ColumnMoved" OnColumnUngrouped="C1GridView1_ColumnUngrouped"

I want ONLY ONE Column for Grouping, not 2 or more.,

My legacy code

 //Grouping field
C1BoundField fieldGroupBy = (C1BoundField)(((C1GridViewColumnMovedEventArgs)(e)).Column);

                  if (C1GridView1.GroupedColumns.Count > 1)
                  {
                       //If there are two grouping fields, then delete and add only last grouping field selected
                       C1GridView1.GroupedColumns.Clear();
                        C1GridView1.GroupedColumns.Add(fieldGroupBy);
                   }

Alternatives for

C1GridView1.GroupedColumns

((C1GridViewColumnMovedEventArgs)(e)).Column

?

and backcolor grouping ? backcolor for row selected and row cursor ??

please, any help very appreciated! thanks!!

akshay.rajput

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Posted 7 May 2026, 1:49 am EST

Hi,

To enable grouping for only one column, you may update the ColumnGrouped event so it set grouping as none for all other columns.

Sample Code

        protected void C1GridView1_ColumnGrouped(object sender, C1.Web.Wijmo.Controls.C1GridView.C1GridViewColumnGroupedEventArgs e)
        {
            // Loop through all columns currently in the grid
            foreach (C1BoundField col in C1GridView1.Columns)
            {
                // If the column in the loop is NOT the one the user just grouped...
                if (col != e.Drag)
                {
                    col.GroupInfo.Position = C1.Web.Wijmo.Controls.C1GridView.GroupPosition.None;
                }
            }
            // Rebind the grid to reflect the updated, single-column grouping
            BindGrid();
        }

The styling issues can be handled with CSS like the one below

        <style>
            tr.wijmo-wijgrid-row.wijmo-wijgrid-groupheaderrow{
                background-color:lemonchiffon;
                height:30px;
            }
            .wijmo-wijgrid tr.wijmo-wijgrid-row.ui-state-hover td:not(.wijmo-wijgrid-rowheader){
                background:antiquewhite;
                background-color:antiquewhite;
                cursor: pointer;
                
            }
            .wijmo-wijgrid-row.wijmo-wijgrid-datarow .wijgridtd[aria-selected="true"]{
                background-color:burlywood;
                border-color:darksalmon;
            }
        </style>

Please refer to the attached sample below

C1WebForms_GridView.zip

enrique.pv-ext

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Posted 7 May 2026, 8:33 am EST

IMHO, this is not required in C1GridView1_ColumnGrouped:

Only e.Drag column has .GroupInfo.Position value not None.

    foreach (C1BoundField col in C1GridView1.Columns)
     {
         // If the column in the loop is NOT the one the user just grouped...
         if (col != e.Drag)
         {
             col.GroupInfo.Position = C1.Web.Wijmo.Controls.C1GridView.GroupPosition.None;
         }
     }

What is GroupSingleRow property ?

Whats means Position: Header or Footer ?

What is OutlineMode OutlineMode.StartExpanded ?

ColumnGrouped event:

And what is e.Drag vs e.Drop ? differences ?

whats means e.Position; ?

What is DestIndex?

protected void C1GridView1_ColumnGrouped(object sender, C1.Web.Wijmo.Controls.C1GridView.C1GridViewColumnGroupedEventArgs e)
        {
            // Example: Notify the user which column is now primary for grouping
            string colName = e.Drag.HeaderText;
            var x = e.Drop?.HeaderText;
            var pos = e.Position;
            var id = e.DestIndex;

I can count grouped columns like this ?

   var groupedColumns = new List<string>();
   foreach (C1BaseField baseField in C1GridView1.Columns)
   {
       var col = baseField as C1BoundField;
       if (col == null)
       {
           continue;
       }

       var position = col.GroupInfo != null ? col.GroupInfo.Position : GroupPosition.None;
       if (position != GroupPosition.None)
       {
           groupedColumns.Add(!string.IsNullOrEmpty(col.DataField) ? col.DataField : (col.HeaderText ?? string.Empty));
       }
   }

   var groupedCount = groupedColumns.Count;
   var groupedColumnsText = string.Join(", ", groupedColumns);
   Logger.Info(string.Format("Grouped columns count: {0}. Grouped columns: {1}", groupedCount, groupedColumnsText));

Thanks all,

akshay.rajput
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Posted 8 May 2026, 2:51 am EST
Hi,

>> IMHO, this is not required in C1GridView1_ColumnGrouped: Only e.Drag column has .GroupInfo.Position value not None.

In my testing, if I do not re-bind the data the grouping only groups the data based on the first page and then after I change the page the data is recalculated.

As for the property info, please check the following pages of our API Doc:

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

https://developer.mescius.com/componentone/docs/webforms/online-dialog/C1.Web.Wijmo.Controls.45~C1.Web.Wijmo.Controls.C1GridView.C1GridViewColumnGroupedEventArgs_members.html

>> I can count grouped columns like this ?

Yes, yoou can check the GroupInfo position to get the count.

Regards,

Akshay

enrique.pv-ext

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Posted 8 May 2026, 3:58 am EST

Thanks Akshay!

The ONLY way is check the GroupInfo position to get the count, isn’t ?

How to get Sort Expression for Group Columns (GroupInfo)?

In older version, legacy code:

gridView.GroupedColumns[0].SortExpression

 //Group grid datasource 
   var result = from row in GetGridFilterByFieldType(gridView, mainTable, appDateFormat, sortEventArgs).AsEnumerable()
                      group row by new
                      {
                          Name = row.Field<object>(gridView.GroupedColumns[0].SortExpression)
                      } into grp
                      select new
                      {
                          NAME = grp.Key.Name,
                          COUNT = grp.Count(),
                      };

        DataTable dt = result.ToList().ToDataTable();
         dt.Select(null, (gridView.GroupedColumns[0].SortDirection == C1SortDirection.Ascending ? "Name ASC" : "Name DESC"));

akshay.rajput

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Posted 11 May 2026, 2:02 am EST

Hi,

>> The ONLY way is check the GroupInfo position to get the count, isn’t ?

For count, you can also check for grouped index like

        protected void C1GridView1_ColumnGrouped(object sender, C1.Web.Wijmo.Controls.C1GridView.C1GridViewColumnGroupedEventArgs e)
        {
            var groupedColumns = new List<string>();
            foreach (C1Field baseField in C1GridView1.Columns)
            {
                var col = baseField as C1BoundField;
                if (col == null)
                {
                    continue;
                }

                var index = col.GroupedIndex;

                if (index != -1)
                {
                    groupedColumns.Add(!string.IsNullOrEmpty(col.DataField) ? col.DataField : (col.HeaderText ?? string.Empty));
                }
            }

            var groupedCount = groupedColumns.Count;
            var groupedColumnsText = string.Join(", ", groupedColumns);
            BindGrid();
        }

>> How to get Sort Expression for Group Columns (GroupInfo)?

AFAIK, there should be a SortExpression or SortDirection field on Column. If that doesn’t work for you, I would suggest that you create a new case for the same.

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