RadListBox

[sandeep]

How  to prevent  a particular item from left to right using code on server side or by using javascript on client side.

Eg: If user want to move 'Argentina' from left to right,i want to prevent  and show an alert message saying  "It is not possible"  


           RoleSelectedListBox = new RadListBox();
            RoleSelectedListBox.ID = "RoleSelectedListBox";
            RoleSelectedListBox.TabIndex = 1;
            //RoleSelectedListBox.CssClass = "RoleSelectedListBoxStyle";
            RoleSelectedListBox.SelectionMode = ListBoxSelectionMode.Multiple;
            RoleSelectedListBox.AllowTransfer = true;
            RoleSelectedListBox.TransferToID = "RoleAvailableListBox";
            RoleSelectedListBox.Skin = "FuzeCustom";
            RoleSelectedListBox.EnableEmbeddedSkins = false;
            RoleSelectedListBox.EnableDragAndDrop = true;
            RoleSelectedListBox.EnableMarkMatches = true;
            RoleSelectedListBox.Sort = RadListBoxSort.Ascending;
            RoleSelectedListBox.SortItems(); 

[sandeep]

Can any one help me to find the solution for this....please..

[Nencho]

Hello,

In order to achieve the desired functionality, you could use the OnClientTransferring client-side event. In the handler, you could verify the Source ListBox  (using get_sourceListBox().get_id() ) and the item, which is currently about to be transfer. If the item's text is Argentina, you could use the args.set_cancel(true) function to cancel the transfer.
I have prepared as sample example for you, demonstrating the implementation of the above suggestion.


Regards,
Nencho
Telerik

 

 

[sandeep]

It is working fine when i am transferring single item from left to right,but when i am trying to transfer all items from left to right, except "Agentina",this is raising an alert even i specify the condition as like you mentioned in the attachment...

[Nencho]

Hello,

In case of a multiple transfer, I would suggest you to implement the approach, demonstrated in the following documentation article :

http://www.telerik.com/help/aspnet-ajax/listbox-how-to-transfer-specific-items-with-transferall-button.html

Basically, you would need to cancel the entire Transferring event and manually transfer the items, that meet the needed requirements for transfer.

Regards,
Nencho
Telerik