Hi Bertuzzi,
Thank you for using Syncfusion products.
We don’t have inbuilt support for adding the Checked list box cell type. The checkbox list can be used inside of the combobox dropdown by using the custom cell renderer and custom cell model. We have already provided the dashboard sample for adding the CheckBox list in to the combobox with GridControl. Here we have provided the sample with GridGroupingControl. In this sample , we have customized the GridStaticCellModel and GridStaticCellRenderer to create the custom cell type. Please refer to the attached sample.
Code snippet
//Adding the custom cell model.
this.gridGroupingControl1.TableModel.CellModels.Add("DropDownUserControl", new DropDownUserCellModel(this.gridGroupingControl1.TableModel, new DropDownUser()));
this.gridGroupingControl1.TableDescriptor.Columns["Description"].Appearance.AnyRecordFieldCell.CellType = "DropDownUserControl";
Sample link
Dashboard sample location
<InstalledLocation>Syncfusion\EssentialStudio\<Version Number>\Windows\Grid.Windows\Samples\Custom Cell Types\Drop Down Cell Demo
Regards,
Piruthiviraj