WPF_TextEdit输入提示、校验

1.xaml 提示label

<StackPanel Orientation="Horizontal" Margin="0,5" HorizontalAlignment="Center">
   <dxlc:LayoutItem Name="txtTip" Label="123" Foreground="Red" Width="100" Height="20"/>
</StackPanel>

2.输入框

<dxe:TextEdit x:Name="txtN1" Width="120"  InvalidValueBehavior="AllowLeaveEditor" EditValueChanging="txtN1_EditValueChanging" />

3.cs处理

private void txtN1_EditValueChanging(object sender, DevExpress.Xpf.Editors.EditValueChangingEventArgs e)
{
   this.txtTip.Label = "提示文字"
}