GridComboBoxColumn How to set default Display Text?

[Robert]

I have looked all through the Properties for the GridComboBoxColumn.  I cannot find a "DefaultDisplayText" when there is no matching Value.  This is for whne there is a new row when there is no link to the Row yet.  I would like to say "Select item" when there is no selected ComboBox value.

Anybody know how to do this?  

Thanks in advance.

[Mohanram Anbukkarasu]

Hi Robert, 

Thanks for contacting Syncfusion support.  

GridComboBoxColumn diesn;t have any direct support to display default text on it when there is no selected item. However you can achieve this requirement by using SfDataGrid.DrawCell event as shown in the following code example. 

Code example :  

this.sfDataGrid.DrawCell += SfDataGrid_DrawCell; 

 

private void SfDataGrid_DrawCell(object sender, Syncfusion.WinForms.DataGrid.Events.DrawCellEventArgs e) 

{ 

    if(e.Column.MappingName == "ShipCountry" && string.IsNullOrEmpty(e.DisplayText)) 

    { 

        e.Style.TextColor = Color.Gray; 

        e.DisplayText = "Select Item"; 

    } 

} 

 

Sample link : https://www.syncfusion.com/downloads/support/forum/158216/ze/SfDataGrid_GridComboBoxColumn_DefaultText1467134010  

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

Regards, 

Mohanram A. 

[Robert]

Hi,  Thanks for the reply.  But the code did not work.  There is no SFDataGrid.DrawCell event. Your answer appears to be for WinForms.  I am using UWP.  Any other suggestions?

[Mohanram Anbukkarasu]

Hi Robert, 

Sorry for the inconvenience.  

You can achieve this requirement in UWP using DisplayBinding property of the column as shown in the following code example. 

Code example :  

<Page.Resources> 

    <local:ComboBoxValueConverter x:Key="comboBoxValueConverter"/> 

</Page.Resources> 

 

<syncfusion:GridComboBoxColumn MappingName="ReportsTo" ItemsSource="{Binding Reporters}" DisplayBinding="{Binding Path=ReportsTo, Converter={StaticResource comboBoxValueConverter}}"/> 

 

public class ComboBoxValueConverter : IValueConverter 

{ 

    public object Convert(object value, Type targetType, object parameter, string language) 

    { 

        if (string.IsNullOrEmpty(value.ToString())) 

            value = "Select a Value"; 

        return value; 

    } 

 

    public object ConvertBack(object value, Type targetType, object parameter, string language) 

    { 

        throw new NotImplementedException(); 

    } 

} 

Sample link : https://www.syncfusion.com/downloads/support/forum/158216/ze/SfDataGrid_GridComboBoxColumnUWP-871765323  

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

Regards, 

Mohanram A. 

[Robert]

Thanks for that.  That worked fine.

[Mohanram Anbukkarasu]

Hi Robert,  

Thanks for the update.  

We are glad to know that the provided solution worked at your end. Please let us know if you have any further queries on this. We are happy to help you. 

Regards, 

Mohanram A.