title: WPF Binding (Using Trigger) not working from TextBox to Label
body: <p>Friends, I am new to WPF MVVM structure.
  I was trying to copy TextField value to a Label using Trigger. What I was doing is in below xaml code.</p>
  
  <p><strong>VehicalForm.xaml</strong></p>
  
  <pre><code>        &lt;Window x:Class="Seris.VehicalForm"
              xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
              Title="MainWindow" Height="500" Width="600"&gt;
  &lt;Control&gt;
      &lt;Control.Template&gt;
          &lt;ControlTemplate&gt;
              &lt;WrapPanel Orientation="Vertical" Margin="10 " &gt;
                  &lt;Label Content="Vehical No" HorizontalAlignment="Left"/&gt;
                  &lt;TextBox Name="VehicalNo_Text" Height="23" Width="80" TextWrapping="Wrap" Text="{Binding VehicalNo}"  HorizontalAlignment="Left" /&gt;
                  &lt;Label Content="Model" HorizontalAlignment="Left"/&gt;
                  &lt;TextBox Name="Model_Text" Height="23" Width="80" TextWrapping="Wrap" Text="{Binding Model}" HorizontalAlignment="Left" /&gt;
                  &lt;Label Content="Manufacturing Date" HorizontalAlignment="Left"/&gt;
                  &lt;DatePicker Name="ManufacturingDate_DateTime" SelectedDate="{Binding ManufacturingDate, Mode=TwoWay}"/&gt;
                  &lt;Label Content="IU No" HorizontalAlignment="Left"/&gt;
                  &lt;TextBox Height="23" Width="80" Name="IUNO_Text" TextWrapping="Wrap" Text="{Binding IUNo}" HorizontalAlignment="Left"/&gt;
                  &lt;Label Content="Personnel" HorizontalAlignment="Left"/&gt;
                  &lt;ComboBox Name="Personnel_Combo" SelectedValue="{Binding PersonnelNameSelected}" ItemsSource="{Binding PersonnelName, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay}" HorizontalAlignment="Left" Width="116"/&gt;
                  &lt;Separator Height="20" RenderTransformOrigin="0.5,0.5" Width="16"/&gt;
                  &lt;Button Name="Save_Button" Command="{Binding SaveButton_Command}" Content="Save" Width="66"/&gt;
                  &lt;Label x:Name="Error_Label" Content="{Binding ErrorMessage, UpdateSourceTrigger=PropertyChanged}" Foreground="Red" HorizontalAlignment="Left" Height="41" Width="137"/&gt;
                  &lt;ListView Name ="Grid" Height="294" Width="371" &gt;
                      &lt;DataGrid Name="DG" ItemsSource="{Binding ListItems, UpdateSourceTrigger=PropertyChanged}" SelectionUnit="Cell" GridLinesVisibility="None" IsReadOnly="True" AutoGenerateColumns="False" BorderThickness="0"&gt;
                          &lt;DataGrid.Columns&gt;
                              &lt;DataGridTextColumn Header="Vehical No" Binding="{Binding VehicalNo}" /&gt;
                              &lt;DataGridTextColumn Header="Model" Binding="{Binding Model}" /&gt;
                              &lt;DataGridTextColumn Header="ManufacturingDate" Binding="{Binding ManufacturingDate}" /&gt;
                              &lt;DataGridTextColumn Header="IUNo" Binding="{Binding IUNo}" /&gt;
                              &lt;DataGridTextColumn Header="Personnel" Binding="{Binding PersonnelNameSelected, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay}" /&gt;
  
                          &lt;/DataGrid.Columns&gt;
  
                      &lt;/DataGrid&gt;
                  &lt;/ListView&gt;
                  &lt;Label Name="Notification" Content="hjgj"/&gt;
  
              &lt;/WrapPanel&gt;
              &lt;ControlTemplate.Triggers&gt;
                 &lt;DataTrigger Binding="{Binding IsMouseOver, ElementName=VehicalNo_Text}" Value="true"&gt;
                      &lt;Setter Property="Content" TargetName="Notification" Value="{Binding Text, UpdateSourceTrigger=PropertyChanged}"/&gt;
                  &lt;/DataTrigger&gt;
              &lt;/ControlTemplate.Triggers&gt;
          &lt;/ControlTemplate&gt;
      &lt;/Control.Template&gt;
  &lt;/Control&gt;
  &lt;/Window&gt;
  </code></pre>
  
  <p>Here I am unable to Bind value of "Vehical_Text" to Label named as "Notification.
  So my question is,</p>
  
  <p>1) How to do this successfully using trigger
  2) I couldn't find IsMouseClick. If I need mouseClick event which property to set.</p>