Define method WPF user control

Question

I have this User control: I added this user control to my Winforms application (simple BusyIndicator)

UserControl x:Class="Stackoverflow.MyBusyIndicator"
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
         xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
         xmlns:xctk="clr-namespace:Xceed.Wpf.Toolkit;assembly=Xceed.Wpf.Toolkit"
         mc:Ignorable="d" 
         d:DesignHeight="300" d:DesignWidth="300">
    <Grid>
        <xctk:BusyIndicator x:Name="busyIndicator" IsBusy="{Binding IsBusy}"  />
    </Grid>
</UserControl>

And all i want is define Method that i can access from c# code in order to stop this indicator.

Answer 1

I believe what you want to do this in the code behind?

public partial class MyBusyIndicator : UserControl
{
    public void ToggleIndicator(bool isBusy)
    {
        // Just an example, in reality you will want to access the BusyIndicator object.
        this.IsBusy = isBusy;
    }
}

Answer 2

Try this :

<UserControl x:Class="Stackoverflow.MyBusyIndicator"
     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
     xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
     xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
     xmlns:xctk="clr-namespace:Xceed.Wpf.Toolkit;assembly=Xceed.Wpf.Toolkit"
     mc:Ignorable="d" 
     d:DesignHeight="300" d:DesignWidth="300">
<Grid>
    <xctk:BusyIndicator x:Name="myBusyIndicator" IsBusy="True" />
</Grid>
</UserControl>

Code Bahind :

namespace Stackoverflow
{
   using System;
   using System.Windows;
   using System.Windows.Controls;

   public partial class MyBusyIndicator : UserControl
   {
      public MyBusyIndicator()
      {
         this.InitializeComponent();
      }
      public void ShowIndicator(bool isBusy)
      {
         this.myBusyIndicator.IsBusy = isBusy;
      }
    }
}

Answer 3

Your XAML code is fine, now just create a Dependency Property and call it "IsBusy", which you then can bind to in your UserControl XAML using a DataBinding (to visually indicate the IsBusy property state),

public partial class BusyIndicator : UserControl
{
    public BusyIndicator()
    {
        InitializeComponent();
    }

    public bool IsBusy
    {
        get { return (bool)GetValue(IsBusyProperty); }
        set { SetValue(IsBusyProperty, value); }
    }

    public static readonly DependencyProperty IsBusyProperty =  
    DependencyProperty.Register("IsBusy", typeof(bool), typeof(BusyIndicator), 
    new PropertyMetadata(false));
}

Answer 4

If you have to access it through code-behind first provide a name attribute to the BusyIndicator control through Xaml first: <xctk:BusyIndicator IsBusy="True" x:Name="busyIndicator" />

In your code behind create a method as below:

void SetIndicator(bool isBusy)
{
    this.busyIndicator.IsBusy = isBusy;
}

If you are using MVVM bind your control's IsBusyProperty IsBusy={Binding IsBusy}

<xctk:BusyIndicator IsBusy={Binding IsBusy} />

And in your viewmodel define IsBusy property and create method as below:

void SetIndicator(bool isBusy)
{
    IsBusy = isBusy;
}

So next time you want to set is as True call SetIndicator(true) or if you want to set it as false call SetIndicator(false).