Selecting Items

[Nathan J Pledger]

Hi (again),

I have the following ListView definition:

<telerik:RadListBox ID="radListBoxGroups" runat="server"
                                                    AllowDelete="false"
                                                    AllowReorder="false"
                                                    AllowTransfer="true"
                                                    AllowTransferDuplicates="false"
                                                    AllowTransferOnDoubleClick="true"
                                                    CheckBoxes="false"
                                                    SelectionMode="Multiple"
                                                    TransferMode="Move"
                                                    Height="300"
                                                    Width="180"
                                                    TransferToID="radListBoxGroupsSelected"
                                                >
                                                    <ButtonSettings Position="Right"
                                                        RenderButtonText="false"
                                                        ShowDelete="false"
                                                        ShowReorder="false"
                                                        ShowTransfer="true"
                                                        ShowTransferAll="false"
                                                        VerticalAlign="Middle" />
                                                </telerik:RadListBox>
                                                <telerik:RadListBox ID="radListBoxGroupsSelected" runat="server"
                                                    Height="300" Width="170">
                                                </telerik:RadListBox>

And I use the following code to populate it:

            var query = from dg in _dataGroups
                        join dgi in _originalDataGroupItems on dg.ID equals dgi.ParentDataGroup.ID into sr
                        from x in sr.DefaultIfEmpty()
                        select new { DataGroupID = dg.ID, IsEnabled = x != null, DataGroupName = dg.Name };

            foreach (var q in query)
            {
                RadListBoxItem radListBoxItem=new RadListBoxItem(q.DataGroupName,q.DataGroupID.ToString());
                radListBoxGroups.Items.Add(radListBoxItem);
                if (q.IsEnabled)
                {
                    radListBoxItem.Selected = true;
                }
            }

I have traced through and some items are set to Selected==true, yet the ListView does not reflect this. The UI does not move items to the right-hand list and the SelectedItems collection returns Count==0.

What am I doing wrong?

[Simon]

Hi Nathan J Pledger,

I tried reproducing the issue with the provided RadListBox definitions and static data without success - Items were properly transferred between ListBoxes. Additionally, on postback the SelectedItems property of both ListBoxes returned the correct selected Items.

Without looking at your complete code I will be unable to determine what is causing these issue at your side.

Do you receive any JavaScript errors on the page?

Kind regards,
Simon
the Telerik team

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[Nathan J Pledger]

Hi Simon,

I'm afraid I don't have a JS error. Further, I can move the items into the selected box on the right myself using the UI.

If I post the full (well, relevant) code for the form maybe that would highlight if I am doing something wrong at some point in the page lifecycle.

namespace IWW.MIGTurbo2.ASPNET.Presentation.Secure.Dialogs.Data
{

    public partial class EditClient : MIGTurboPage
    {

        protected void Page_Load(object sender, EventArgs e)
        {

            using (ISession session = AspNetSessionFactory.GetSession())
            {


                _client = null;

// assume client is retrieved here

                if (!IsPostBack)
                {

                    PopulateForClient(_client,session);
                }
            }

        }


        private void PopulateDataGroupsListView(ISession session)
        {
            var query = from dg in _dataGroups
                        join dgi in _originalDataGroupItems on dg.ID equals dgi.ParentDataGroup.ID into sr
                        from x in sr.DefaultIfEmpty()
                        select new { DataGroupID = dg.ID, IsEnabled = x != null, DataGroupName = dg.Name };

            foreach (var q in query)
            {
                RadListBoxItem radListBoxItem=new RadListBoxItem(q.DataGroupName,q.DataGroupID.ToString());
                radListBoxGroups.Items.Add(radListBoxItem);
                if (q.IsEnabled)
                {
                    radListBoxItem.Selected = true;
                }
            }
        }




        private void PopulateForClient(IClient client, ISession session)
        {
// field populate here

            PopulateDataGroupsListView(session);
        }


    }
}

I haven't got to working with the PostBack just yet.

[Simon]

Hello Nathan J Pledger,

Your code is correct, so there should be something else causing the issue.

Could you verify that data base query returns correct information (i.e. there are records with IsEnabled == true)?

Greetings,
Simon
the Telerik team

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[Nathan J Pledger]

Hi Simon,

I can confirm that some items come back in both IsEnabled==true and IsEnabled==false.

[Simon]

Hi Nathan J Pledger,

Since I am still unsure of what is causing the issue you are describing, it would be best if you open a formal support ticket and send us the page or the project (if needed to reproduce the issue).

We will inspect and debug it thoroughly, eventually providing a solution or a workaround.

Best wishes,
Simon
the Telerik team

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Check out the tipsfor optimizing your support resource searches.

[Nathan J Pledger]

Thanks.

It's Ticket Number 229350