BusyIndicator makes it easy to let the user know when an application is busy. Simply wrap the relevant content in an instance of the BusyIndicator control and toggle its IsBusy property to True during any long-running process.

example:

<hc:BusyIndicator IsBusy="True" >
      <grid>

      </grid>
</hc:BusyIndicator>

Custom Content

 <hc:BusyIndicator IsBusy="True" DisplayAfter="0">
       <hc:BusyIndicator.BusyContentTemplate>
            <DataTemplate>
                 <StackPanel Margin="4">
                          <TextBlock Text="Downloading Email" FontWeight="Bold" HorizontalAlignment="Center"/>
                           <StackPanel Margin="4">
                               <TextBlock Text="Downloading message 4/10..."/>
                               <ProgressBar Value="40" Height="15"/>
                           </StackPanel>
                           <Grid>
                               <Grid.ColumnDefinitions>
                                   <ColumnDefinition/>
                                   <ColumnDefinition/>
                               </Grid.ColumnDefinitions>
                               <Button Grid.Column="0" Content="Pause" HorizontalAlignment="Right" Margin="0 0 2 0"/>
                               <Button Grid.Column="1" Content="Cancel" HorizontalAlignment="Left" Margin="2 0 0 0"/>
                           </Grid>
                  </StackPanel>
            </DataTemplate>
       </hc:BusyIndicator.BusyContentTemplate>
       <hc:BusyIndicator.OverlayStyle>
                  <Style TargetType="Rectangle">
                        <Setter Property="Fill" Value="#ffffeeee"/>
                  </Style>
       </hc:BusyIndicator.OverlayStyle>
       <hc:BusyIndicator.ProgressBarStyle>
                   <Style TargetType="ProgressBar">
                            <Setter Property="Visibility" Value="Collapsed"/>
                   </Style>
       </hc:BusyIndicator.ProgressBarStyle>
       <ContentControl Style="{StaticResource SampleContent}"/>
</hc:BusyIndicator>

Attributes

Property	Description
BusyContent	Gets or sets the busy content to display to the user.
BusyContentTemplate	Gets or sets the DataTemplate to use for displaying the busy content to the user.
DisplayAfter	Gets or sets the time interval that the busy content is delayed before being displayed.
FocusAfterBusy	Gets or sets a control that should get focus when the busy indicator disappears.
IsBusy	Gets or sets a value indicating whether the busy indicator should be shown.
IsContentVisible	Gets or sets a value indicating whether the BusyContent is visible.
OverlayStyle	Gets or sets a Style object representing the style to use for the overlay. By default, null.
ProgressBarStyle	Gets or sets a Style object representing the style to use for the progress bar. By default, null.