The following examples show how to store a DataObject during drag-drop process.

Example

Description

DragSourceEvent (EventType = DragInit) and DragInitEvent are the events that raised when the drag is about to start, so it is the ideal event to store a DataObject if necessary.

This example shows how to store a DataObject that will be carried by the drag object.

Code

Using Event Handler

XAML	Copy Code
<Grid x:Name="LayoutRoot"> <Intersoft:UXListBox x:Name="UXListBox1" HorizontalAlignment="Center" Height="200" VerticalAlignment="Center" Width="150" AllowMoveItem="True" AllowReorderItem="True" DragInit="UXListBox1_DragInit"> <Intersoft:UXListBoxItem Content="Freezed"/> <Intersoft:UXListBoxItem Content="Dragable Item 1"/> <Intersoft:UXListBoxItem Content="Dragable Item 2"/> </Intersoft:UXListBox> </Grid>

XAML

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<Grid x:Name="LayoutRoot">
    <Intersoft:UXListBox x:Name="UXListBox1" HorizontalAlignment="Center" Height="200" VerticalAlignment="Center" Width="150" 
                            AllowMoveItem="True" AllowReorderItem="True" DragInit="UXListBox1_DragInit">
        <Intersoft:UXListBoxItem Content="Freezed"/>
        <Intersoft:UXListBoxItem Content="Dragable Item 1"/>
        <Intersoft:UXListBoxItem Content="Dragable Item 2"/>
    </Intersoft:UXListBox>        
</Grid>

C#	Copy Code
private void UXListBox1_DragInit(object sender, Intersoft.Client.UI.Controls.Interactivity.DragEventArgs e) { string sourceData = "Some string data to store..."; byte[] unicodeText = Encoding.Unicode.GetBytes(sourceData); byte[] utf8Text = Encoding.UTF8.GetBytes(sourceData); string uniCodeFormat = "Unicode"; string utf8DataFormat = "UTF-8"; DragDropEventData dataObject = e.Data as DragDropEventData; dataObject.SetData(sourceData); dataObject.SetData(uniCodeFormat, unicodeText); dataObject.SetData(utf8DataFormat, utf8Text); }

Copy Code

private void UXListBox1_DragInit(object sender, Intersoft.Client.UI.Controls.Interactivity.DragEventArgs e)
{
    string sourceData = "Some string data to store...";
    byte[] unicodeText = Encoding.Unicode.GetBytes(sourceData);
    byte[] utf8Text = Encoding.UTF8.GetBytes(sourceData);

    string uniCodeFormat = "Unicode";
    string utf8DataFormat = "UTF-8";
            
    DragDropEventData dataObject = e.Data as DragDropEventData;
    dataObject.SetData(sourceData);
    dataObject.SetData(uniCodeFormat, unicodeText);
    dataObject.SetData(utf8DataFormat, utf8Text);
}

Using DragInitEvent

XAML	Copy Code
<Grid x:Name="LayoutRoot"> <Intersoft:UXListBox x:Name="UXListBox1" HorizontalAlignment="Center" Height="200" VerticalAlignment="Center" Width="150" AllowMoveItem="True" AllowReorderItem="True"> <Intersoft:UXListBoxItem Content="Freezed"/> <Intersoft:UXListBoxItem Content="Dragable Item 1"/> <Intersoft:UXListBoxItem Content="Dragable Item 2"/> </Intersoft:UXListBox> </Grid>

XAML

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<Grid x:Name="LayoutRoot">
    <Intersoft:UXListBox x:Name="UXListBox1" HorizontalAlignment="Center" Height="200" VerticalAlignment="Center" Width="150" 
                            AllowMoveItem="True" AllowReorderItem="True">
        <Intersoft:UXListBoxItem Content="Freezed"/>
        <Intersoft:UXListBoxItem Content="Dragable Item 1"/>
        <Intersoft:UXListBoxItem Content="Dragable Item 2"/>
    </Intersoft:UXListBox>        
</Grid>

C#	Copy Code
public MainPage() { // Required to initialize variables InitializeComponent(); ISEventManager.RegisterInstanceHandler( this.UXListBox1, // any element in the routed path which applicable in your scenario ISDragDrop.DragInitEvent, // the routed event new Intersoft.Client.UI.Controls.Interactivity.DragEventHandler(UXListBox1_DragInit), // the event handler true); } private void UXListBox1_DragInit(object sender, Intersoft.Client.UI.Controls.Interactivity.DragEventArgs e) { string sourceData = "Some string data to store..."; byte[] unicodeText = Encoding.Unicode.GetBytes(sourceData); byte[] utf8Text = Encoding.UTF8.GetBytes(sourceData); string uniCodeFormat = "Unicode"; string utf8DataFormat = "UTF-8"; DragDropEventData dataObject = e.Data as DragDropEventData; dataObject.SetData(sourceData); dataObject.SetData(uniCodeFormat, unicodeText); dataObject.SetData(utf8DataFormat, utf8Text); }

Copy Code

public MainPage()
{
    // Required to initialize variables
    InitializeComponent();

    ISEventManager.RegisterInstanceHandler(
        this.UXListBox1, // any element in the routed path which applicable in your scenario
        ISDragDrop.DragInitEvent, // the routed event
        new Intersoft.Client.UI.Controls.Interactivity.DragEventHandler(UXListBox1_DragInit), // the event handler
        true);
}

private void UXListBox1_DragInit(object sender, Intersoft.Client.UI.Controls.Interactivity.DragEventArgs e)
{
    string sourceData = "Some string data to store...";
    byte[] unicodeText = Encoding.Unicode.GetBytes(sourceData);
    byte[] utf8Text = Encoding.UTF8.GetBytes(sourceData);

    string uniCodeFormat = "Unicode";
    string utf8DataFormat = "UTF-8";
            
    DragDropEventData dataObject = e.Data as DragDropEventData;
    dataObject.SetData(sourceData);
    dataObject.SetData(uniCodeFormat, unicodeText);
    dataObject.SetData(utf8DataFormat, utf8Text);
}

Using DragSourceEvent [DragInit]

XAML	Copy Code
<Grid x:Name="LayoutRoot"> <Intersoft:UXListBox x:Name="UXListBox1" HorizontalAlignment="Center" Height="200" VerticalAlignment="Center" Width="150" AllowMoveItem="True" AllowReorderItem="True"> <Intersoft:UXListBoxItem Content="Freezed"/> <Intersoft:UXListBoxItem Content="Dragable Item 1"/> <Intersoft:UXListBoxItem Content="Dragable Item 2"/> </Intersoft:UXListBox> </Grid>

XAML

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<Grid x:Name="LayoutRoot">
    <Intersoft:UXListBox x:Name="UXListBox1" HorizontalAlignment="Center" Height="200" VerticalAlignment="Center" Width="150" 
                            AllowMoveItem="True" AllowReorderItem="True">
        <Intersoft:UXListBoxItem Content="Freezed"/>
        <Intersoft:UXListBoxItem Content="Dragable Item 1"/>
        <Intersoft:UXListBoxItem Content="Dragable Item 2"/>
    </Intersoft:UXListBox>        
</Grid>

C#	Copy Code
public MainPage() { // Required to initialize variables InitializeComponent(); ISEventManager.RegisterInstanceHandler( this.UXListBox1, // any element in the routed path which applicable in your scenario ISDragDrop.DragSourceEvent, // the routed event new Intersoft.Client.UI.Controls.Interactivity.DragEventHandler(UXListBox1_DragInit), // the event handler true); } private void UXListBox1_DragInit(object sender, Intersoft.Client.UI.Controls.Interactivity.DragEventArgs e) { if (e.GetEventType() == DragEventType.DragInit) { string sourceData = "Some string data to store..."; byte[] unicodeText = Encoding.Unicode.GetBytes(sourceData); byte[] utf8Text = Encoding.UTF8.GetBytes(sourceData); string uniCodeFormat = "Unicode"; string utf8DataFormat = "UTF-8"; DragDropEventData dataObject = e.Data as DragDropEventData; dataObject.SetData(sourceData); dataObject.SetData(uniCodeFormat, unicodeText); dataObject.SetData(utf8DataFormat, utf8Text); } }

Copy Code

public MainPage()
{
    // Required to initialize variables
    InitializeComponent();

    ISEventManager.RegisterInstanceHandler(
        this.UXListBox1, // any element in the routed path which applicable in your scenario
        ISDragDrop.DragSourceEvent, // the routed event
        new Intersoft.Client.UI.Controls.Interactivity.DragEventHandler(UXListBox1_DragInit), // the event handler
        true);
}

private void UXListBox1_DragInit(object sender, Intersoft.Client.UI.Controls.Interactivity.DragEventArgs e)
{
    if (e.GetEventType() == DragEventType.DragInit)
    {
        string sourceData = "Some string data to store...";
        byte[] unicodeText = Encoding.Unicode.GetBytes(sourceData);
        byte[] utf8Text = Encoding.UTF8.GetBytes(sourceData);

        string uniCodeFormat = "Unicode";
        string utf8DataFormat = "UTF-8";
            
        DragDropEventData dataObject = e.Data as DragDropEventData;
        dataObject.SetData(sourceData);
        dataObject.SetData(uniCodeFormat, unicodeText);
        dataObject.SetData(utf8DataFormat, utf8Text);
    }
}

Concepts

Drag-drop Framework Overview

Other Resources

Drag-drop Framework How-to Topics

Locating the Samples in Local Installation

Walkthroughs and How-to Topics