Transfer Specific Items with Transfer All Button

By default, the Transfer All button will transfer all the items from RadListBox to the related RadListBox. This article shows how to transfer specific items when the Transfer All button is clicked. We will cancel the OnClientTransferring event and will use the transferItem client method to transfer the items that we need.

1. RadListBox declaration:

ASPNET

<telerik:RadListBox RenderMode="Lightweight" ID="RadListBox1"
   runat="server"
   Skin="Vista"
   AllowTransfer="true"   
   TransferToID="RadListBox2"
   DataKeyField="ID"  
   OnClientTransferring="onClientTransferring"
   DataTextField="Name"
   DataValueField="ID"       
   DataSourceID="SqlDataSource1" >    
</telerik:RadListBox>
<telerik:RadListBox RenderMode="Lightweight" ID="RadListBox2" runat="server"
   Skin="Vista"
   AllowTransfer="true">
</telerik:RadListBox>   

2. The OnClientTransferring handler:

JavaScript

function onClientTransferring(sender, e) {debugger
   //cancel the event
   e.set_cancel(true);
   //manually transfer the appropriate items
   var items = e.get_items();
   for (var i = 0; i < items.length; i++) {
	   var item = items[i];
	   if (item.get_text() != "Select" || item.get_value() != "") {
		   sender.transferItem(item, e.get_sourceListBox(), e.get_destinationListBox());
	   }
   }
}

As a result when you click on the Transfer All button all items will be transferred expect these that have Text = "Select" or empty Value property.

See Also

• RadListBox Object