Only allow a specific number of items to be selected

[Spotty]

I have a bound sdDatagrid control and have set the selectionmode to Multiple but I only want to 2 items to be selected.

    Private Sub SfDataGrid2_SelectionChanged(sender As Object, e As SelectionChangedEventArgs) Handles SfDataGridOriginalWP.SelectionChanged

        '//Can Only be two sequential Items

        If CType(sender, SfDataGrid).SelectedItems.Count > 2 Then

            CType(sender, SfDataGrid).SelectedItems.RemoveAt(0)

        End If

   End Sub

This I thought would do the trick and remove the 1st item in the collection if it went over resulting in a FIFO type of collection but although the selectedItems reflects only 2 items - the control still highlights and displays all the selected items.   So there appears to be a mismatch between what is showing in the control and what the data is behind the scenes is showing.

Any suggestions or better ways of handling only allowing a specific number of items to be selected.

 

[Mohanram Anbukkarasu]

Hi Spotty, 

Thanks for contacting Syncfusion products.  

You can achieve your requirement to allow only a specific number of items to be selected by using the SfDataGrid.SelectionChanging and SfDataGrid.CurrentCellActivating events as shown in the following code example.  

Code example :  

sfDataGrid1.SelectionChanging += SfDataGrid1_SelectionChanging; 

sfDataGrid1.CurrentCellActivating += SfDataGrid1_CurrentCellActivating; 

 

private void SfDataGrid1_SelectionChanging(object sender, Syncfusion.WinForms.DataGrid.Events.SelectionChangingEventArgs e) 

{ 

    if (e.RemovedItems.Count ==0 && (sender as SfDataGrid).SelectedItems.Count == 2) 

        e.Cancel = true; 

} 

private void SfDataGrid1_CurrentCellActivating(object sender, Syncfusion.WinForms.DataGrid.Events.CurrentCellActivatingEventArgs e) 

{ 

    if ((sender as SfDataGrid).SelectedItems.Count == 2 && !(sender as SfDataGrid).SelectedItems.Contains(e.DataRow.RowData)) 

        e.Cancel = true; 

} 

We have prepared a sample using the above given code example and it is available in the following link for your reference.  

Sample link : https://www.syncfusion.com/downloads/support/forum/161445/ze/SfDataGrid_SelectionChanging1251199396  

Please let us know if you require further assistance from us.  

Regards, 

Mohanram A.