HI Pierre,
Thank you for your interest in our Syncfusion products.
The Grouping is done by using the “MappingName”. It seems like your using the “Header Text” to add the GroupedColumns. Use the “MappingName” (which is the name of the column at the data table) for Grouping instead of HeaderText.
For example:
Assume that the column name is like “Roll_No” in the data table. You can set the column header text of the column by using grid.TableDescriptor.Columns[“Roll_No”].HeaderText as “Serial No”.
The Column will display with the HeaderText(“Serial No”) while it loaded. If you want to add this column into the GroupedColumns collection you need to use the MappingName not the HeaderText.
C#:
this.gridGroupingControl1.TableDescriptor.GroupedColumns.Add(“Roll_No”); //don’t use the (“Serial No”).
Please let us know if you need any further assistance.
Regards,
Adhi.