How to: Create a ButtonEdit with a Custom Button
The following example shows how to create a ButtonEdit with the Clear button that clears the editor's value.
<dxe:ButtonEdit x:Name="buttonEdit" Width="100"
AllowDefaultButton="False">
<dxe:ButtonEdit.Buttons>
<dxe:ButtonInfo Content="Clear" Click="ButtonInfo_Click" />
</dxe:ButtonEdit.Buttons>
</dxe:ButtonEdit>
private void ButtonInfo_Click(object sender, RoutedEventArgs e) {
buttonEdit.EditValue = string.Empty;
}