How to: Validate Cell Editors

  • 3 minutes to read

This example shows how to validate the focused cell's value. In this example, the product's price can be reduced by 30% if the product is discontinued.

<Window x:Class="DXGrid_ValidatingEditors.Window1"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:dxe="http://schemas.devexpress.com/winfx/2008/xaml/editors"
        xmlns:dxg="http://schemas.devexpress.com/winfx/2008/xaml/grid" 
        Title="Window1" Height="300" Width="600">
    <Grid>
        <dxg:GridControl x:Name="grid" ItemsSource="{Binding ProductList}">
            <dxg:GridControl.Columns>
                <dxg:GridColumn FieldName="ProductName">
                    <dxg:GridColumn.EditSettings>
                        <dxe:TextEditSettings AllowNullInput="False" />
                    </dxg:GridColumn.EditSettings>
                </dxg:GridColumn>
                <dxg:GridColumn FieldName="UnitPrice" Validate="GridColumn_Validate">
                    <dxg:GridColumn.EditSettings>
                        <dxe:SpinEditSettings DisplayFormat="c2" />
                    </dxg:GridColumn.EditSettings>
                </dxg:GridColumn>
                <dxg:GridColumn FieldName="Discontinued" />
            </dxg:GridControl.Columns>
            <dxg:GridControl.View>
                <dxg:TableView AutoWidth="True" HiddenEditor="TableView_HiddenEditor" />
            </dxg:GridControl.View>
        </dxg:GridControl>
    </Grid>
</Window>