Listbox 'Transfer buttons' are always disabled

[oren yona]

Hi,

I'm trying to simulate the transfer between listbox example
(http://demos.telerik.com/aspnet-ajax-beta/listbox/examples/default/defaultcs.aspx),
but I'm doing it programatically (the listboxes are inside a custom web server control, and are created and populated dynamically).
everything works fine except that the transfer buttons are always disabled, no matter what I try to do.
(I configured one of the list box to "allowTransfer=true" and the "TransferToListoxID" to the other list box's ID)
I even tried the "AllowDrag" option, but when I drag items to the other listbox they just don't get transfered.

What am I doing wrong?

Thanks in advanced!

Oren

[Tojara]

I've done what you have described several times and I've never encountered such problem. Can you paste here you your codebehind code?

[oren yona]

Sure,
Here's what I've done:

   

public class FilterString : Panel, INamingContainer 

{ 

RadWindow window = new RadWindow() {VisibleStatusbar=false, Skin = "Vista", Behaviors = WindowBehaviors.Close | WindowBehaviors.Move, Width = 390, Height = 400 }; 

RadListBox radLstRight = new RadListBox() {AllowTransfer = true, SelectionMode = ListBoxSelectionMode.Multiple, TransferMode = ListBoxTransferMode.Move, Height = 170, Width = 150 ,Skin="Office2007"}; 

RadListBox radLstLeft = new RadListBox() {SelectionMode = ListBoxSelectionMode.Multiple, TransferMode = ListBoxTransferMode.Move, Height = 170, Width = 180, Skin = "Office2007" };


...



public void OpenFilter(DataTable dt, string columnName, string columnNameTran) 

{

    FillStringList(dt, columnName);

    window.VisibleOnPageLoad = true; 

}

  

protected override void CreateChildControls() 

{

    EnsureChildControls(); 

     ...

    // controls 

    radLstLeft.TransferToID = radLstRight.ID; 

    radLstRight.TransferToID = radLstLeft.ID;

    Table table = new Table() 

     {

        CssClass= "filtermenu_table", 

         Rows = { new TableRow() { Cells = { new TableCell() { Controls = { lblHeader } }}}, 

                      new TableRow() { Cells = { new TableCell() { Controls = { radLstRight,radLstLeft}}}}, 

            new TableRow() {Cells = {new TableCell () {Controls = lblSearch, txtSearch,lkbSearch}}}}, 

            new TableRow() {Cells = {new TableCell() { Controls = lkbCut, lkbClose} }}}} 

        };

  

    window.ContentContainer.Controls.Add(table);

    this.Controls.Add(window);

    base.CreateChildControls();

}

  

...

private void FillStringList(DataTable dv, string colName) 

{

    // I Manually Add Items to the listbox, because I want each Item to appear only once 
    (I couldn't do it using databind)

    radLstRight.Items.Clear();

    radLstLeft.Items.Clear();  

    List<string> items = new List<string>(); 

   foreach (DataRow item in dv.Rows) 

    {

    string value = item[colName].ToString(); 

    if (!items.Contains(value)) 

    items.Add(value);

    }

    

    foreach (string item in items) 

       radLstRight.Items.Add(new RadListBoxItem(item));

}

 

NOTE: 'Open filter' is called when a button is clicked on another custom web server control.

 

 

 

 

 

 

 

[oren yona]

Just wanted to say that I solved the problem.
Apparantly I forgot to specify an ID to the listboxes.

everything works now!

thanks,

Oren