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Cannot view programmatically added RadListBoxItems (RadListbox is not refreshed)

3 Answers 111 Views

Buttons, RadioButton, CheckBox, etc

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

Bahadır asked on 09 May 2013, 11:25 AM

Hi everybody,

I have a RadGrid which has checkbox as GridTemplateColumn. When the checkbox is clicked, I want to add a new item to a RadListbox.
I use the click event and add RadListBoxItems to my RadListbox, but the new item is not rendered in browser. I can also add a new item using a button's click event. After button click event, I can see both newly added items. So the problem is, a new item cannot be seen after checkbox click event.

Am I doing something wrong or it this a bug?
(Telerik assembly version: v4.0.30319)

Below is the related code:

<telerik:RadGrid ID="rgStudentList" runat="server" AllowFilteringByColumn="True"

AllowSorting="True" CellSpacing="0" Enabled="false" GridLines="None" GroupingSettings-CaseSensitive="false"

OnItemCommand="rgOgrenciListesi_ItemCommand" OnNeedDataSource="rgOgrenciListesi_NeedDataSource"

SortingSettings-SortToolTip="">

<GroupingSettings CaseSensitive="False" />

<SortingSettings SortToolTip="" />

<MasterTableView AllowPaging="true" AutoGenerateColumns="False" DataKeyNames="No"

PageSize="10">

<CommandItemSettings ExportToPdfText="Export to PDF" />

<RowIndicatorColumn FilterControlAltText="Filter RowIndicator column">

<HeaderStyle Width="20px" />

</RowIndicatorColumn>

<ExpandCollapseColumn FilterControlAltText="Filter ExpandColumn column">

<HeaderStyle Width="20px" />

</ExpandCollapseColumn>

<Columns>

<telerik:GridBoundColumn AllowFiltering="true" AllowSorting="true" AutoPostBackOnFilter="true"

CurrentFilterFunction="StartsWith" DataField="TCKimlikNo" FilterControlAltText="Filter column1 column"

>

</telerik:GridBoundColumn>

<telerik:GridTemplateColumn HeaderText="Seç" AllowFiltering="false">

<ItemTemplate>

<asp:CheckBox ID="chkI" runat="server" AutoPostBack="true" OnCheckedChanged="chkI_CheckedChanged" />

</ItemTemplate>

<HeaderTemplate>

<asp:CheckBox ID="chkH" runat="server" AutoPostBack="true"

OnCheckedChanged="chkH_CheckedChanged" />

</HeaderTemplate>

</telerik:GridTemplateColumn>

</Columns>

<EditFormSettings>

<EditColumn FilterControlAltText="Filter EditCommandColumn column">

</EditColumn>

</EditFormSettings>

<NoRecordsTemplate>

<center>

blah blah</center>

</NoRecordsTemplate>

</MasterTableView>

<FilterMenu EnableImageSprites="true">

</FilterMenu>

<HeaderContextMenu CssClass="GridContextMenu GridContextMenu_Default">

</HeaderContextMenu>

</telerik:RadGrid>

protected void chkI_CheckedChanged(object sender, EventArgs e)

{

CheckBox chkI = sender as CheckBox;

String student= ((GridDataItem)chkI.Parent.Parent).Cells[3].Text;

rlbOgrNo.Items.Add(new RadListBoxItem(student, student));

}

After the checkbox checked changed event, I cannot see the new item added. (Not rendered.)

I tried many things but no hope. Any help is appreciated.
Thanks.
Bahadır

3 Answers, 1 is accepted

answered on 14 May 2013, 12:03 PM

RadGridListBox.zip

Hi Bahadır,

I was not able to reproduce the issue in our latest release which is Q1 2013 SP2. I prepared a small sample and attached it to this thread. Please give it a try and let me know how it differs from your real setup.

Kind regards,
Kostadin
the Telerik team

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