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Tooltip lost after SortItems (with workaround)

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ListBox

This is a migrated thread and some comments may be shown as answers.

Matthew Johnson asked on 04 Nov 2010, 03:49 PM

This is an fyi post for anyone one who might be have a simular problem. I plan on submitting a problem ticket as well.

I have a project which requires two listboxes (transfer back and forth).  The "select from listbox" contains a list of Clients (with each client having a corresponding time zone. One of the requirements is have a dropdown containing time zones just below the "select from listbox". When you select a timezone from the dropdown, the Listbox should select all Clients with matching timezones (so you can easily transfer all clients for that time zone).

No real problem so far, I simply added the RadListBoxItems to the Listbox one at a time looping through the datatable setting the time zone of the client to the tooltip of the RadListBoxItem. With some javascript I snagged from the forums here I was able to loop through the listbox and compare the tooltip with the dropdown selected value, selecting the item if it matches.

Instead of turning on AutoPostBackOnTransfer, I added a button "Sort Lists" that can be clicked if the user feels the need to sort the lists.

Here's where the problem occurs, it seems as though any RadListBoxItem that is moved during the SortItems process looses it's tooltip (if an item isn't moved the tooltip will reamin).

I was able to work around this problem by adding an attribute to the RadListBoxItem (it seems attributes do persist after a sort) and then looping through the ListBox after SortItems and reassigning the Tooltip.

markup :

<table><tr>

<td valign="top">

<asp:Label ID="lblPracticeSelect" runat="server" Text="Practice Select:"></asp:Label><br />

          <telerik:RadListBox ID="rlbPracticeSelect" runat="server" Height="257px" Width="225px"
                                  AllowTransfer="True" AllowTransferOnDoubleClick="True" EnableDragAndDrop="True"
                 EnableMarkMatches="true" SelectionMode="Multiple" TransferToID="rlbPracticeSearch">

<ButtonSettings TransferButtons="All" />

</telerik:RadListBox>

<br />

<asp:Label ID="Label3" runat="server" Text="Time Zone:" Visible="false" />

<asp:DropDownList ID="ddlTimeZone" runat="server" Width="185px" OnChange="selectItems()">

<asp:ListItem Selected="True" Text="Select Practice(s) in Time Zone" Value="0" />

<asp:ListItem Text="EST" Value="EST" />

<asp:ListItem Text="CST" Value="CST" />

<asp:ListItem Text="MST" Value="MST" />

<asp:ListItem Text="PST" Value="PST" />

<asp:ListItem Text="AKST" Value="AKST" />

<asp:ListItem Text="HST" Value="HST" />

</asp:DropDownList>

</td>

<td align="left" valign="top">

<asp:Label ID="lblPracticeSearch" runat="server" Text="Practice Search:"></asp:Label><br />

          <telerik:RadListBox ID="rlbPracticeSearch" runat="server" Width="180px" Height="257px"
                    AllowTransfer="True" AllowTransferOnDoubleClick="True" EnableDragAndDrop="True"
                    EnableMarkMatches="true" SelectionMode="Multiple" TransferToID="rlbPracticeSelect">

<ButtonSettings ShowTransfer="false" ShowTransferAll="false" />

</telerik:RadListBox>

<br />

<asp:Label ID="lblTimeZone" runat="server" Text=""></asp:Label>

          <asp:CustomValidator ID="cvPractice" runat="server" ValidationGroup="SearchSummary"
                    Display="Dynamic" ErrorMessage="Please select at least one Practice."
                    ClientValidationFunction="ValidatePractices"> </asp:CustomValidator>

</td>

<tr>

<td colspan=2>

<asp:Button ID="btnSort" runat="server" Text="Sort Lists" Width="80px" />

</td>

</tr>

</table>

javascript:

<telerik:RadScriptBlock ID="RadScriptBlock1" runat="server">

<script language="javascript" type="text/javascript">

function filterListBox(sender, e) {

var list = $find("<%= rlbPracticeSelect.ClientID %>");

var tz = document.getElementById('<%=ddlTimeZone.ClientID %>');

var items = list.get_items();

for (var i = 0; i < items.get_count(); i++) {

var item = items.getItem(i);

var itemTimeZone = item._element.title;

item.unselect();

if (itemTimeZone == tz.value) {

//list.transferToDestination(item);

item.select();

item.scrollIntoView();

}

}</script>

</telerik:RadScriptBlock>

code behind:

Private Sub LoadPractices()

Try

rlbPracticeSelect.Items.Clear()

rlbPracticeSearch.Items.Clear()

Dim dt As DataTable = GetAllPractices()

If dt.Rows.Count > 0 Then

With rlbPracticeSelect

Dim dr As DataRow

For Each dr In dt.Rows

Dim rItem As New RadListBoxItem(dr("Name").ToString, dr("ID").ToString)

rItem.ToolTip = dr("TimeZone").ToString

rItem.Attributes.Add("TimeZone", dr("TimeZone").ToString)

.Items.Add(rItem)

Next

End With

End If

Catch ex As Exception

Dim sError As String = ex.Message

Finally

End Try

End Sub

when the sort button is clicked:

Private Sub btnSort_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnSort.Click

rlbPracticeSearch.SortItems()

rlbPracticeSelect.SortItems()

Dim itmSelect As RadListBoxItem

For Each itmSelect In rlbPracticeSelect.Items

itmSelect.ToolTip = itmSelect.Attributes("TimeZone")

Next

Dim itmSearch As RadListBoxItem

For Each itmSearch In rlbPracticeSearch.Items

itmSearch.ToolTip = itmSearch.Attributes("TimeZone")

Next

End Sub

Tooltip lost after SortItems (with workaround)

2 Answers, 1 is accepted