RadListBox - SortItems issue

[Mathew]

Hello,
I have 2 list boxes and I have this below code that runs when an item from "RadListBox2" is moved to "RadListBox1". 

It executes and sorts fine after using the buttons to transfer items, however, if I drag/drop then there is an issue.  After dropping on "RadListBox1", it takes the item from "RadListBox2" and puts it in its proper place (meaning alphabetically sorted).  However, it also takes the very last item in "RadListBox1" and moves it up to the location where the item was dropped. 

 

public void RadListBox1_Transferred(object sender, RadListBoxTransferredEventArgs e)

 

 

{

 

RadListBox1.Sort =

RadListBoxSort.Ascending;

 

 

RadListBox1.SortItems();

 

}

So, just an example...
I start with ListBox #1 having values:  a, b, c, x, y, z
Then I drop value "m" from ListBox#2 onto ListBox #1 (location between "a" and "b")and I end up with this list: a, z, b, c, m, x, y  
The location of "m" is fine (it got sorted).  The new location of "z" is the problem.

Has anyone seen this behavior before?

Thanks,
Matt

[Dean]

Hi Mathew,

I've just tested your problem with version 2011.1.315.35 of the Telerik ASP.NET AJAX Control and found no problems at all, this is the code below that I'm using for my test. What version of the controls are you using?

ASP Markup:

<table>
        <tr>
            <td>
                <telerik:RadListBox ID="RadListBox1" runat="server" AllowTransfer="True"
                    TransferToID="RadListBox2" Sort="Ascending" Height="200px" AutoPostBackOnTransfer="true">
                    <ButtonSettings TransferButtons="All" />
                    <Items>
                        <telerik:RadListBoxItem runat="server" Text="b" Value="b" />
                        <telerik:RadListBoxItem runat="server" Text="a" Value="a" />
                        <telerik:RadListBoxItem runat="server" Text="d" Value="d" />
                        <telerik:RadListBoxItem runat="server" Text="c" Value="c" />
                        <telerik:RadListBoxItem runat="server" Text="z" Value="z" />
                    </Items>
                </telerik:RadListBox>
            </td>
            <td>
                <telerik:RadListBox ID="RadListBox2" runat="server" Sort="Ascending"
                    AllowDelete="True" AllowReorder="True" Height="200px" AutoPostBackOnTransfer="true">
                    <ButtonSettings TransferButtons="All" />
                    <Items>
                        <telerik:RadListBoxItem runat="server" Text="m" Value="m" />
                    </Items>
                </telerik:RadListBox>
            </td>
        </tr>
    </table>

Code Behind:

Private Sub RadListBox1_Transferred(ByVal sender As Object, ByVal e As Telerik.Web.UI.RadListBoxTransferredEventArgs) Handles RadListBox1.Transferred
    RadListBox1.Sort = Telerik.Web.UI.RadListBoxSort.Ascending
    RadListBox1.SortItems()
End Sub

Private Sub RadListBox2_Transferred(ByVal sender As Object, ByVal e As Telerik.Web.UI.RadListBoxTransferredEventArgs) Handles RadListBox2.Transferred
    RadListBox2.Sort = Telerik.Web.UI.RadListBoxSort.Ascending
    RadListBox2.SortItems()
End Sub

[Mathew]

Version 2010.3.1317.35

[Dean]

Hi Mathew,

I see nothing in the release history thats states there was a problem with this and only see new features being added to the RadListBox Control, maybe submit a support ticket and see if the telerik staff can take a look at it.

[Peter Filipov]

Hi Mathew,

I was able to reproduce the issue with both versions - 2010.3.1317 and 2011.1.315.
To resolve it please sort items in the Page_PreRender event:

protected void Page_PreRender(object sender, EventArgs e)
{
RadListBox1.Sort = RadListBoxSort.Ascending;
RadListBox1.SortItems();
RadListBox2.Sort = RadListBoxSort.Ascending;
RadListBox2.SortItems();
}

The issue has been forwarded to our development team for further investigation.

Regards,
Peter Filipov
the Telerik team

[Mathew]

That works!  Thanks Peter!