How to enable the MultiSelection in GridComboBoxColumn of DataGrid ?

By default, we can select one item from GridComboBoxColumn in SfDataGrid. If you want to select multiple item, this can be achieved by overriding the OnInitializeEditView and set SfComboBox.MultiSelectMode as Delimiter in GridComboBoxCellRenderer.

this.dataGrid.CellRenderers.Remove("ComboBox");
this.dataGrid.CellRenderers.Add("ComboBox", new CustomComboBoxRenderer());
 
public class CustomComboBoxRenderer : GridCellComboBoxRenderer
{
    public override void OnInitializeEditView(DataColumnBase dataColumn, GridComboBox view)
    {
        view.Text = null;
        view.SelectedIndices = null;
        base.OnInitializeEditView(dataColumn, view);
        view.MultiSelectMode = Syncfusion.XForms.ComboBox.MultiSelectMode.Delimiter;
    }
 
    public override object GetControlValue()
    {
        return CurrentCellRendererElement.GetValue(SfComboBox.TextProperty);
    }
}

Sample Link: XamarinDataGrid

Conclusion

I hope you enjoyed learning about how to enable the MultiSelection in GridComboBoxColumn of DataGrid.

You can refer to our  Xamarin.Forms DataGrid feature tour page to know about its other groundbreaking feature representations. You can also explore our  Xamarin.Forms DataGrid documentation to understand how to create and manipulate data.

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