WPF textbox validation client side

Question

I am did text box validation.

But i want to make some style on text box on various phase.

When my page 1st time load the textbox looks like following style. enter image description here

When User start entering value and if value is wrong the entire textbox background will be RED. enter image description here

When user enter right value the Text box have GREEN Border with 2PX.
enter image description here

I am Using Following Style :

  <Style x:Key="TxtEmailStyle" TargetType="{x:Type TextBox}">
        <Setter Property="Background" Value="#2d2f34"></Setter>
        <Setter Property="Foreground" Value="White"></Setter>
        <Setter Property="TextBlock.FontSize" Value="14" />
        <Setter Property="Padding" Value="5" />
        <Setter Property="BorderBrush" Value="Green"></Setter>
        <Setter Property="BorderThickness" Value="2"></Setter>
        <Setter Property="Validation.ErrorTemplate">
            <Setter.Value>
                <ControlTemplate>
                    <DockPanel LastChildFill="True">
                        <TextBlock DockPanel.Dock="Right" 
                        Foreground="Orange"
                        FontSize="12pt">
                        !!!!
                        </TextBlock>
                        <Border BorderBrush="Green" BorderThickness="1">
                            <AdornedElementPlaceholder />
                        </Border>
                    </DockPanel>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
        <Style.Triggers>
            <Trigger Property="IsFocused" Value="true">
                <Setter Property="Background" Value="#56585e" />
            </Trigger>
            <Trigger Property="IsMouseOver" Value="true">
                <Setter Property="Background" Value="#07839a" />
            </Trigger>
            <Trigger Property="Validation.HasError" Value="true">
                <Setter Property="ToolTip"
        Value="{Binding RelativeSource={x:Static RelativeSource.Self},
                        Path=(Validation.Errors)[0].ErrorContent}"/>
                <Setter Property="Background" Value="#cb0b38"></Setter>
            </Trigger>
            <!--<Trigger Property="Validation.HasError" Value="false">
                <Setter Property="BorderBrush" Value="Green"></Setter>
                <Setter Property="BorderThickness" Value="2"></Setter>
                <Setter Property="Background" Value="#2d2f34"></Setter>
            </Trigger>-->

        </Style.Triggers>
    </Style>

The following is my TextBox

 <TextBox x:Name="txtPlayerID"  HorizontalAlignment="Left" Height="30" TextWrapping="Wrap" 
                                     VerticalContentAlignment="Center"
                    Style="{StaticResource TxtEmailStyle}" VerticalAlignment="Top" Width="228" FontFamily="Arial Regular"
                    RenderTransformOrigin="0.408,-2.455" FontSize="14"
                                     Margin="27,0,0,0">

                                <TextBox.Text>

                                    <Binding Path="playerID" Source="{StaticResource Register}"
                          ValidatesOnDataErrors="True"     NotifyOnValidationError="True"
                         UpdateSourceTrigger="PropertyChanged">
                                        <Binding.ValidationRules>

                                            <ExceptionValidationRule/>
                                        </Binding.ValidationRules>
                                    </Binding>
                                </TextBox.Text>
                            </TextBox>

@ Shrivallabh : I want to change the TextBox border style on base of the user input :- if Correct input Make it Green , If Wrong input Background Red , and if no input then default textbox style — ujjaval
You can show your dependency property which has playerID ? — Hodaya Shalom
Not sure I understand the question. Assuming your viewmodel is bound up correctly and is correctly validating the property associated with the textbox, it should work correctly. Your styles are a bit of a mess though, I would remove those completely if it were me — Mintey

David David · Accepted Answer · 2013-03-23T16:01:51

A tricky/ugly approach is to use a story board (might be tricky, as you don't want animation, but you can change the animation time to infinite anyway) below is the code snippet:

<Storyboard x:Key="ChangeBkColor" Storyboard.TargetProperty="(TextBox.Background)">
    <ColorAnimation Storyboard.TargetProperty="Background.Color" 
             From="Red" To="Red" Duration="0:0:10"/> <!--Change 10 secs to yours-->
</Storyboard>

And somewhere, e.g. in the text changed event handler

Storyboard sb = this.FindResource("ChangeBkColor") as Storyboard;
if (sb != null && SomeCondition1)  <!--SomeCondition1: for red background-->
{
     Storyboard.SetTarget(sb, this.txtPlayerID);
     sb.Begin();  // Here comes the effect!
}

You should create two story boards for your case, and in the text changed handler, tell what conditions, and selectively play the story boards.

WPF textbox validation client side

1 Answers