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Drag & Drop in Windows Phone

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[[Category:Windows Phone]][[Category:Silverlight]][[Category:Code Examples]][[Category:Code Snippet]]
+
[[Category:Windows Phone]][[Category:Silverlight]][[Category:Code Examples]][[Category:UI]]
{{Abstract|This article explains how to use Interaction Behaviors API to Drag & Drop objects in Windows Phone }}
+
{{Abstract|This article explains how to use [http://msdn.microsoft.com/en-us/library/microsoft.expression.interactivity.layout.mousedragelementbehavior_members(v=expression.40).aspx Interaction Behaviors API] to Drag & Drop objects in Windows Phone }}
 
+
  
 
{{ArticleMetaData <!-- v1.2 -->
 
{{ArticleMetaData <!-- v1.2 -->
Line 25: Line 24:
 
|author= [[User:Pavan.pareta]]
 
|author= [[User:Pavan.pareta]]
 
}}
 
}}
 
== Introduction ==
 
Drag & Drop is a feature, which allows you to move objects from one place to another place in your application. Drag and drop functionality also allows you to a smart user experience to access the application. This article shows how simple drag and drop can be implemented in Windows Phone.
 
  
 
== Implementation ==
 
== Implementation ==
Line 34: Line 30:
 
In this example I have targeted both UI elements such as drawing objects i.e. (Rectangle, Ellipse and Path) and UI components (TextBlock, Image) to do Drag & Drop; however you can also use others components.
 
In this example I have targeted both UI elements such as drawing objects i.e. (Rectangle, Ellipse and Path) and UI components (TextBlock, Image) to do Drag & Drop; however you can also use others components.
  
Here is an approach to achieve drag & drop functionality in your windows phone application.
+
Here is an approach to achieve drag & drop functionality in your Windows Phone application.
  
 
==== Drag & Drop using managed API - Interaction Behaviors API ====
 
==== Drag & Drop using managed API - Interaction Behaviors API ====
<br />
 
 
[[File:WmDev DandD concept.gif]]
 
  
Here are the three core sequences to be implemented in drag & drop using traditional process.
+
[[File:WmDev DandD concept.gif|none]]
  
 +
Here are the three core sequences to be implemented in drag & drop using traditional process:
 
#  Tap (Press) & hold down – MouseDown Event.
 
#  Tap (Press) & hold down – MouseDown Event.
 
#  Drag the mouse to place the object to the desired location – MouseMove Event.  
 
#  Drag the mouse to place the object to the desired location – MouseMove Event.  
Line 48: Line 42:
  
  
Using [http://msdn.microsoft.com/en-us/library/microsoft.expression.interactivity.layout.mousedragelementbehavior_members(v=expression.40).aspx Interaction Behaviors API] which is straightforward to implement and easy to use in your application.
+
Using the ''Interaction Behaviors API'' which is straightforward to implement and easy to use in your application.
  
 
'''Step-1:''' Add two references to '''Microsoft.Expression.Interactions''' and '''System.Windows.Interactivity''' in your solution.
 
'''Step-1:''' Add two references to '''Microsoft.Expression.Interactions''' and '''System.Windows.Interactivity''' in your solution.
  
#     Go to solution explorer and right click on Project '''->''' References '''->''' click on Add References…
+
# Go to solution explorer and right click on Project '''->''' References '''->''' click on Add References…
# In the Add Reference dialog box, select the .NET tab indicating the type of component you want to reference.
+
# In the '''Add Reference''' dialog box, select the .NET tab indicating the type of component you want to reference.
# Select the Microsoft.Expression.Interactions and System.Windows.Interactivity component to reference, and then click OK.
+
#: [[File:WmDevDnD0001.png|none]]
 
+
# Select the '''Microsoft.Expression.Interactions''' and '''System.Windows.Interactivity''' component to reference, and then click OK.
 
+
[[File:WmDevDnD0001.png]]
+
  
  
Line 69: Line 61:
  
 
'''Step-3:''' Define the following objects in XAML.
 
'''Step-3:''' Define the following objects in XAML.
 +
# [http://msdn.microsoft.com/en-us/library/system.windows.shapes.rectangle(v=vs.95).aspx Rectangle]
 +
# [http://msdn.microsoft.com/en-us/library/system.windows.shapes.ellipse(v=vs.95).aspx Ellipse]
 +
# [http://msdn.microsoft.com/en-us/library/system.windows.shapes.path(v=vs.95).aspx Path]
 +
# [http://msdn.microsoft.com/en-us/library/system.windows.controls.textblock(v=vs.95).aspx TextBlock]
 +
# [http://msdn.microsoft.com/en-us/library/system.windows.controls.image(v=vs.95).aspx Image]
  
# [http://msdn.microsoft.com/en-us/library/system.windows.shapes.rectangle(v=vs.95).aspx Rectangle]
 
# [http://msdn.microsoft.com/en-us/library/system.windows.shapes.ellipse(v=vs.95).aspx Ellipse]
 
# [http://msdn.microsoft.com/en-us/library/system.windows.shapes.path(v=vs.95).aspx Path]
 
# [http://msdn.microsoft.com/en-us/library/system.windows.controls.textblock(v=vs.95).aspx TextBlock]
 
# [http://msdn.microsoft.com/en-us/library/system.windows.controls.image(v=vs.95).aspx Image]
 
<br />
 
<code xml>
 
  
 +
<code xml>
 
<Rectangle x:Name="rectangle1" Fill="#FFF35206" HorizontalAlignment="Left" Height="74" Margin="172,478,0,0" Stroke="Black" VerticalAlignment="Top" Width="76" />
 
<Rectangle x:Name="rectangle1" Fill="#FFF35206" HorizontalAlignment="Left" Height="74" Margin="172,478,0,0" Stroke="Black" VerticalAlignment="Top" Width="76" />
  
Line 95: Line 86:
  
  
'''Step-4:''' Attaching a '''MouseDragElementBehavior''' to the object and setting its '''ConstrainToParentBounds''' property to true/false, so it will respect the bounds of its Parent object like a Grid or Border or something. In this example I have set the property '''ConstrainToParentBounds''' to ''false''; now it’s only allows user to drag and drop within a parent’s restricted area.
+
'''Step-4:''' Attaching a {{Icode|MouseDragElementBehavior}} to the object and setting its {{Icode|ConstrainToParentBounds}} property to {{Icode|true}}/{{Icode|false}}, so it will respect the bounds of its parent object like a {{Icode|Grid}} or {{Icode|Border}} etc. In this example I have set the property {{Icode|ConstrainToParentBounds}} to {{Icode|false}}; now it only allows user to drag and drop within a parent’s restricted area.
  
 
<code xml>
 
<code xml>
 
 
<Rectangle x:Name="rectangle1" Fill="#FFF35206" HorizontalAlignment="Left" Height="74" Margin="172,478,0,0" Stroke="Black" VerticalAlignment="Top" Width="76" MouseMove="MouseMoveing">
 
<Rectangle x:Name="rectangle1" Fill="#FFF35206" HorizontalAlignment="Left" Height="74" Margin="172,478,0,0" Stroke="Black" VerticalAlignment="Top" Width="76" MouseMove="MouseMoveing">
 
     <i:Interaction.Behaviors>
 
     <i:Interaction.Behaviors>
Line 104: Line 94:
 
     </i:Interaction.Behaviors>
 
     </i:Interaction.Behaviors>
 
</Rectangle>
 
</Rectangle>
 
 
</code>
 
</code>
  
Line 111: Line 100:
 
<Grid x:Name="gd" Grid.Row="1" Margin="12,0,12,0">
 
<Grid x:Name="gd" Grid.Row="1" Margin="12,0,12,0">
  
            <Rectangle x:Name="rectangle1" Fill="#FFF35206" HorizontalAlignment="Left" Height="80" Margin="254,481,0,0" Stroke="Black" VerticalAlignment="Top" Width="102" MouseMove="MouseMoveing">
+
    <Rectangle x:Name="rectangle1" Fill="#FFF35206" HorizontalAlignment="Left" Height="80" Margin="254,481,0,0" Stroke="Black" VerticalAlignment="Top" Width="102" MouseMove="MouseMoveing">
                <i:Interaction.Behaviors>
+
        <i:Interaction.Behaviors>
                    <el:MouseDragElementBehavior ConstrainToParentBounds="False"/>
+
            <el:MouseDragElementBehavior ConstrainToParentBounds="False"/>
                </i:Interaction.Behaviors>
+
        </i:Interaction.Behaviors>
            </Rectangle>
+
    </Rectangle>
  
            <Rectangle x:Name="rectangle2" Fill="#FFF3DF06" HorizontalAlignment="Right" Height="64" Margin="0,333,279,0" Stroke="Black" VerticalAlignment="Top" Width="123" MouseMove="MouseMoveing">
+
    <Rectangle x:Name="rectangle2" Fill="#FFF3DF06" HorizontalAlignment="Right" Height="64" Margin="0,333,279,0" Stroke="Black" VerticalAlignment="Top" Width="123" MouseMove="MouseMoveing">
                <i:Interaction.Behaviors>
+
        <i:Interaction.Behaviors>
                    <el:MouseDragElementBehavior ConstrainToParentBounds="True"/>
+
            <el:MouseDragElementBehavior ConstrainToParentBounds="True"/>
                </i:Interaction.Behaviors>
+
        </i:Interaction.Behaviors>
            </Rectangle>
+
    </Rectangle>
  
            <Ellipse Margin="54,450,288,72" MouseMove="MouseMoveing" Fill="Blue">
+
    <Ellipse Margin="54,450,288,72" MouseMove="MouseMoveing" Fill="Blue">
                <i:Interaction.Behaviors>
+
        <i:Interaction.Behaviors>
                    <el:MouseDragElementBehavior ConstrainToParentBounds="True"/>
+
            <el:MouseDragElementBehavior ConstrainToParentBounds="True"/>
                </i:Interaction.Behaviors>
+
        </i:Interaction.Behaviors>
            </Ellipse>
+
    </Ellipse>
  
            <Path Data="M78,318 L41,383 L111,380 z" Fill="#FFF306DF" HorizontalAlignment="Left" Height="71.5" Margin="70,0,0,438" Stretch="Fill" Stroke="Black" UseLayoutRounding="False" VerticalAlignment="Bottom" Width="123" MouseMove="MouseMoveing" >
+
    <Path Data="M78,318 L41,383 L111,380 z" Fill="#FFF306DF" HorizontalAlignment="Left" Height="71.5" Margin="70,0,0,438" Stretch="Fill" Stroke="Black" UseLayoutRounding="False" VerticalAlignment="Bottom" Width="123" MouseMove="MouseMoveing" >
                <i:Interaction.Behaviors>
+
        <i:Interaction.Behaviors>
                    <el:MouseDragElementBehavior ConstrainToParentBounds="True"/>
+
            <el:MouseDragElementBehavior ConstrainToParentBounds="True"/>
                </i:Interaction.Behaviors>
+
        </i:Interaction.Behaviors>
            </Path>
+
    </Path>
  
            <Path Data="M275,309 L322,305 L357,327 L362,360 L342,391 L295,398 L259,376 L252,338 z" Fill="#FF06F30A" HorizontalAlignment="Right" Height="94" Margin="0,0,90.5,223" Stretch="Fill" Stroke="Black" UseLayoutRounding="False" VerticalAlignment="Bottom" Width="111" MouseMove="MouseMoveing">
+
    <Path Data="M275,309 L322,305 L357,327 L362,360 L342,391 L295,398 L259,376 L252,338 z" Fill="#FF06F30A" HorizontalAlignment="Right" Height="94" Margin="0,0,90.5,223" Stretch="Fill" Stroke="Black" UseLayoutRounding="False" VerticalAlignment="Bottom" Width="111" MouseMove="MouseMoveing">
                <i:Interaction.Behaviors>
+
        <i:Interaction.Behaviors>
                    <el:MouseDragElementBehavior ConstrainToParentBounds="True"/>
+
            <el:MouseDragElementBehavior ConstrainToParentBounds="True"/>
                </i:Interaction.Behaviors>
+
        </i:Interaction.Behaviors>
            </Path>
+
    </Path>
 
+
            <TextBlock Height="30" Margin="70,50,250,133"
+
              Name="textBlock1" Text="Pavan Pareta" MouseMove="MouseMoveing">
+
                <i:Interaction.Behaviors>
+
                    <el:MouseDragElementBehavior ConstrainToParentBounds="True"/>
+
                </i:Interaction.Behaviors>
+
            </TextBlock>
+
  
            <Image Height="110" Name="image1" Stretch="Fill" Source="/WmDev_DragAndDrop;component/Images/house.png" Margin="254,90,95,407" MouseMove="MouseMoveing">
+
    <TextBlock Height="30" Margin="70,50,250,133"
                <i:Interaction.Behaviors>
+
        Name="textBlock1" Text="Pavan Pareta" MouseMove="MouseMoveing">
                    <el:MouseDragElementBehavior ConstrainToParentBounds="True"/>
+
        <i:Interaction.Behaviors>
 +
            <el:MouseDragElementBehavior ConstrainToParentBounds="True"/>
 
                 </i:Interaction.Behaviors>
 
                 </i:Interaction.Behaviors>
            </Image>
+
    </TextBlock>
  
         </Grid>
+
    <Image Height="110" Name="image1" Stretch="Fill" Source="/WmDev_DragAndDrop;component/Images/house.png" Margin="254,90,95,407" MouseMove="MouseMoveing">
 +
         <i:Interaction.Behaviors>
 +
            <el:MouseDragElementBehavior ConstrainToParentBounds="True"/>
 +
        </i:Interaction.Behaviors>
 +
    </Image>
  
 +
</Grid>
 
</code>
 
</code>
  
UI: Design view output
 
  
[[File:WmDevDnD0003.png]]
+
[[File:WmDevDnD0003.png|frame|none|UI: Design view output]]
  
'''Step-5:''' In additional I have attached an event '''(MouseMoveing)''' to all objects. Handled and set [http://msdn.microsoft.com/en-us/library/system.windows.controls.canvas.zindex(v=vs.95).aspx ZIndex] value to keep dragging object always on front of all objects.
+
'''Step-5:''' In additional I have attached an event '''({{Icode|MouseMoving}})''' to all objects. Handled and set [http://msdn.microsoft.com/en-us/library/system.windows.controls.canvas.zindex(v=vs.95).aspx ZIndex] value to keep dragging object always on front of all objects.
  
{{Note|<br />While dragging an object to another one; dragging object get sets behind the another object. To solve this issue, I have attached the ZIndex property to the current dragging object. <br /><br />'''ZIndex Property''' is an attached property, which allows you to explicitly set the z-order of objects in the child collection of Grid, Canvas and StackPanel objects.}}
+
{{Note|While dragging an object to another one; dragging object get sets behind the another object. To solve this issue, I have attached the {{Icode|ZIndex}} property to the current dragging object.
  
 +
{{Icode|ZIndex}} is an attached property, which allows you to explicitly set the z-order of objects in the child collection of {{Icode|Grid}}, {{Icode|Canvas}} and {{Icode|StackPanel}} objects.}}
  
Code Snippet for the MouseMoving method.
+
Code Snippet for the {{Icode|MouseMoving}} method.
 
<code csharp>
 
<code csharp>
 
private void MouseMoveing(object sender, MouseEventArgs e)
 
private void MouseMoveing(object sender, MouseEventArgs e)
Line 203: Line 191:
 
'''Step-6:''' Now run the application by pressing '''F5''' Key.
 
'''Step-6:''' Now run the application by pressing '''F5''' Key.
  
Output Screen
 
 
[[File:WmDev DandD output.gif]]
 
 
== Summary ==
 
 
'''References:'''
 
 
1. [http://msdn.microsoft.com/en-us/library/microsoft.expression.interactivity.layout.mousedragelementbehavior_members(v=expression.40).aspx MouseDragElementBehavior]
 
 
2. [http://msdn.microsoft.com/en-us/library/microsoft.expression.interactivity.layout.mousedragelementbehavior.constraintoparentbounds(v=expression.40).aspx MouseDragElementBehavior.ConstrainToParentBounds Property]
 
  
3. [http://msdn.microsoft.com/en-us/library/system.windows.controls.canvas.zindex(v=vs.95).aspx ZIndex]
+
[[File:WmDev DandD output.gif|frame|none|Output Screen]]
  
 +
== References==
  
~ Happy Coding ~
+
# [http://msdn.microsoft.com/en-us/library/microsoft.expression.interactivity.layout.mousedragelementbehavior_members(v=expression.40).aspx MouseDragElementBehavior]
 +
# [http://msdn.microsoft.com/en-us/library/microsoft.expression.interactivity.layout.mousedragelementbehavior.constraintoparentbounds(v=expression.40).aspx MouseDragElementBehavior.ConstrainToParentBounds Property]
 +
# [http://msdn.microsoft.com/en-us/library/system.windows.controls.canvas.zindex(v=vs.95).aspx ZIndex]

Revision as of 09:15, 17 September 2012

This article explains how to use Interaction Behaviors API to Drag & Drop objects in Windows Phone

WP Metro Icon UI.png
SignpostIcon XAML 40.png
SignpostIcon WP7 70px.png
Article Metadata
Code ExampleTested with
SDK: Windows Phone 7.1
Devices(s): Nokia Lumia 710, 800
Compatibility
Platform(s): Windows Phone 7.5 (mango)
Windows Phone 7.5
Article
Created: pavan.pareta (16 Sep 2012)
Last edited: hamishwillee (17 Sep 2012)

Implementation

To create a new Windows Phone application, start Microsoft Visual Studio then create a new Project and select Windows Phone Application Template. I have named the application “WmDev_DragAndDrop”.

In this example I have targeted both UI elements such as drawing objects i.e. (Rectangle, Ellipse and Path) and UI components (TextBlock, Image) to do Drag & Drop; however you can also use others components.

Here is an approach to achieve drag & drop functionality in your Windows Phone application.

Drag & Drop using managed API - Interaction Behaviors API

WmDev DandD concept.gif

Here are the three core sequences to be implemented in drag & drop using traditional process:

  1. Tap (Press) & hold down – MouseDown Event.
  2. Drag the mouse to place the object to the desired location – MouseMove Event.
  3. Drop the object by releasing the mouse button - MouseUp Event.


Using the Interaction Behaviors API which is straightforward to implement and easy to use in your application.

Step-1: Add two references to Microsoft.Expression.Interactions and System.Windows.Interactivity in your solution.

  1. Go to solution explorer and right click on Project -> References -> click on Add References…
  2. In the Add Reference dialog box, select the .NET tab indicating the type of component you want to reference.
    WmDevDnD0001.png
  3. Select the Microsoft.Expression.Interactions and System.Windows.Interactivity component to reference, and then click OK.


Step-2: Add the following namespace at the top of your XAML file:

xmlns:el="clr-namespace:Microsoft.Expression.Interactivity.Layout;assembly=Microsoft.Expression.Interactions"
xmlns:i="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity"


Step-3: Define the following objects in XAML.

  1. Rectangle
  2. Ellipse
  3. Path
  4. TextBlock
  5. Image


<Rectangle x:Name="rectangle1" Fill="#FFF35206" HorizontalAlignment="Left" Height="74" Margin="172,478,0,0" Stroke="Black" VerticalAlignment="Top" Width="76" />
 
<Rectangle x:Name="rectangle2" Fill="#FFF3DF06" HorizontalAlignment="Right" Height="64" Margin="0,333,279,0" Stroke="Black" VerticalAlignment="Top" Width="123" />
 
<Ellipse Margin="54,450,288,72" Fill="Blue"/>
 
<Path Data="M78,318 L41,383 L111,380 z" Fill="#FFF306DF" HorizontalAlignment="Left" Height="71.5" Margin="70,0,0,405.5" Stretch="Fill" Stroke="Black" UseLayoutRounding="False" VerticalAlignment="Bottom" Width="123" />
 
<Path Data="M275,309 L322,305 L357,327 L362,360 L342,391 L295,398 L259,376 L252,338 z" Fill="#FF06F30A" HorizontalAlignment="Right" Height="94" Margin="0,0,90.5,223" Stretch="Fill" Stroke="Black" UseLayoutRounding="False" VerticalAlignment="Bottom" Width="111" />
 
<TextBlock Height="30" Margin="70,50,250,133" Name="textBlock1" Text="Pavan Pareta" />
 
<Image Height="110" Name="image1" Stretch="Fill" Source="/WmDev_DragAndDrop;component/Images/house.png" Margin="254,90,95,407"/>


Step-4: Attaching a MouseDragElementBehavior to the object and setting its ConstrainToParentBounds property to true/false, so it will respect the bounds of its parent object like a Grid or Border etc. In this example I have set the property ConstrainToParentBounds to false; now it only allows user to drag and drop within a parent’s restricted area.

<Rectangle x:Name="rectangle1" Fill="#FFF35206" HorizontalAlignment="Left" Height="74" Margin="172,478,0,0" Stroke="Black" VerticalAlignment="Top" Width="76" MouseMove="MouseMoveing">
<i:Interaction.Behaviors>
<el:MouseDragElementBehavior ConstrainToParentBounds="False"/>
</i:Interaction.Behaviors>
</Rectangle>

Here is the complete XAML code:

<Grid x:Name="gd" Grid.Row="1" Margin="12,0,12,0">
 
<Rectangle x:Name="rectangle1" Fill="#FFF35206" HorizontalAlignment="Left" Height="80" Margin="254,481,0,0" Stroke="Black" VerticalAlignment="Top" Width="102" MouseMove="MouseMoveing">
<i:Interaction.Behaviors>
<el:MouseDragElementBehavior ConstrainToParentBounds="False"/>
</i:Interaction.Behaviors>
</Rectangle>
 
<Rectangle x:Name="rectangle2" Fill="#FFF3DF06" HorizontalAlignment="Right" Height="64" Margin="0,333,279,0" Stroke="Black" VerticalAlignment="Top" Width="123" MouseMove="MouseMoveing">
<i:Interaction.Behaviors>
<el:MouseDragElementBehavior ConstrainToParentBounds="True"/>
</i:Interaction.Behaviors>
</Rectangle>
 
<Ellipse Margin="54,450,288,72" MouseMove="MouseMoveing" Fill="Blue">
<i:Interaction.Behaviors>
<el:MouseDragElementBehavior ConstrainToParentBounds="True"/>
</i:Interaction.Behaviors>
</Ellipse>
 
<Path Data="M78,318 L41,383 L111,380 z" Fill="#FFF306DF" HorizontalAlignment="Left" Height="71.5" Margin="70,0,0,438" Stretch="Fill" Stroke="Black" UseLayoutRounding="False" VerticalAlignment="Bottom" Width="123" MouseMove="MouseMoveing" >
<i:Interaction.Behaviors>
<el:MouseDragElementBehavior ConstrainToParentBounds="True"/>
</i:Interaction.Behaviors>
</Path>
 
<Path Data="M275,309 L322,305 L357,327 L362,360 L342,391 L295,398 L259,376 L252,338 z" Fill="#FF06F30A" HorizontalAlignment="Right" Height="94" Margin="0,0,90.5,223" Stretch="Fill" Stroke="Black" UseLayoutRounding="False" VerticalAlignment="Bottom" Width="111" MouseMove="MouseMoveing">
<i:Interaction.Behaviors>
<el:MouseDragElementBehavior ConstrainToParentBounds="True"/>
</i:Interaction.Behaviors>
</Path>
 
<TextBlock Height="30" Margin="70,50,250,133"
Name="textBlock1" Text="Pavan Pareta" MouseMove="MouseMoveing">
<i:Interaction.Behaviors>
<el:MouseDragElementBehavior ConstrainToParentBounds="True"/>
</i:Interaction.Behaviors>
</TextBlock>
 
<Image Height="110" Name="image1" Stretch="Fill" Source="/WmDev_DragAndDrop;component/Images/house.png" Margin="254,90,95,407" MouseMove="MouseMoveing">
<i:Interaction.Behaviors>
<el:MouseDragElementBehavior ConstrainToParentBounds="True"/>
</i:Interaction.Behaviors>
</Image>
 
</Grid>


UI: Design view output

Step-5: In additional I have attached an event (MouseMoving) to all objects. Handled and set ZIndex value to keep dragging object always on front of all objects.

Note.pngNote: While dragging an object to another one; dragging object get sets behind the another object. To solve this issue, I have attached the ZIndex property to the current dragging object. ZIndex is an attached property, which allows you to explicitly set the z-order of objects in the child collection of Grid, Canvas and StackPanel objects.

Code Snippet for the MouseMoving method.

private void MouseMoveing(object sender, MouseEventArgs e)
{
if (sender.GetType() == typeof(Rectangle))
{
Rectangle cx = (Rectangle)sender;
Canvas.SetZIndex(cx, idx++);
}
if (sender.GetType() == typeof(Ellipse))
{
Ellipse cx = (Ellipse)sender;
Canvas.SetZIndex(cx, idx++);
}
if (sender.GetType() == typeof(Path))
{
Path cx = (Path)sender;
Canvas.SetZIndex(cx, idx++);
}
else if (sender.GetType() == typeof(TextBlock))
{
TextBlock realSender = (TextBlock)sender;
Canvas.SetZIndex(realSender, idx++);
}
else if (sender.GetType() == typeof(Image))
{
Image realSender = (Image)sender;
Canvas.SetZIndex(realSender, idx++);
}
}


Step-6: Now run the application by pressing F5 Key.


Output Screen

References

  1. MouseDragElementBehavior
  2. MouseDragElementBehavior.ConstrainToParentBounds Property
  3. ZIndex
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