Collapse after timer ticks

[fredn]

Hello,

I have a grid with for each item a detail table. The data for this grid are filled out using NeedDataSource and DetailTableDataBind events.
I also have a time which is in charge of rebinding the grid every 5 seconds.

My problem comes when I have expanded an item of the grid, in order to see its detail table, and the timer ticks. Then the item is automatically collapsed...

How can I avoid this automatic collapsing.
My Telerik version is v2008.1.619.35.

Here are sample codes :

<telerik:RadStyleSheetManager runat="server">
</telerik:RadStyleSheetManager>
<telerik:RadScriptManager ID="RadScriptManager1" runat="server">
</telerik:RadScriptManager>
<telerik:RadAjaxManager ID="RadAjaxManager1" runat="server">
    <ajaxsettings>
        <telerik:AjaxSetting AjaxControlID="Timer1">
            <UpdatedControls>
                <telerik:AjaxUpdatedControl ControlID="RadGrid1" />
            </UpdatedControls>
        </telerik:AjaxSetting>
        <telerik:AjaxSetting AjaxControlID="RadGrid1">
            <UpdatedControls>
                <telerik:AjaxUpdatedControl ControlID="RadGrid1" />
            </UpdatedControls>
        </telerik:AjaxSetting>
    </ajaxsettings>
</telerik:RadAjaxManager>

<asp:Timer ID="Timer1" runat="server" Interval="5000" OnTick="Timer1_Tick"></asp:Timer>

<telerik:RadGrid ID="RadGrid1" runat="server" GridLines="None" OnNeedDataSource="RadGrid1_NeedDataSource"
    OnDetailTableDataBind="RadGrid1_DetailTableDataBind" Skin="Inox" AutoGenerateColumns="False">
    <mastertableview datakeynames="moduleId">
        <DetailTables>
            <telerik:GridTableView DataKeyNames="childModuleId" Name="Dependencies" Width="80%" runat="server">
                <Columns>
                    <telerik:GridBoundColumn  HeaderText="id" DataField="childModuleId" UniqueName="childModuleId" Visible="false">
                    </telerik:GridBoundColumn>
                    <telerik:GridTemplateColumn HeaderText="Dependencies" UniqueName="childModuleSelected"
                            ItemStyle-Width="10">
                            <ItemTemplate>
                                <asp:CheckBox ID="childActivatedCheckBox" Checked='<%# Convert.ToBoolean(Eval("childModuleSelected")) %>'
                                    runat="server" AutoPostBack="True" />
                            </ItemTemplate>
                            <ItemStyle Width="10px"></ItemStyle>
                        </telerik:GridTemplateColumn>
                    <telerik:GridBoundColumn DataField="childModuleName" ItemStyle-Width="150" UniqueName="childModuleName">
                            <ItemStyle Width="150px"></ItemStyle>
                        </telerik:GridBoundColumn>
                </Columns>
            </telerik:GridTableView>
        </DetailTables>
        <Columns>
            <telerik:GridBoundColumn HeaderText="Id" DataField="moduleId" UniqueName="moduleId">
            </telerik:GridBoundColumn>
            <telerik:GridTemplateColumn HeaderText="Selected" UniqueName="moduleSelected" ItemStyle-Width="10">
                    <ItemTemplate>
                        <asp:CheckBox ID="activatedCheckBox" Checked='<%# Convert.ToBoolean(Eval("moduleSelected")) %>'
                            runat="server" AutoPostBack="True" />
                    </ItemTemplate>
                    <ItemStyle Width="10px"></ItemStyle>
                </telerik:GridTemplateColumn>
            <telerik:GridBoundColumn HeaderText="Module Name" ItemStyle-Width="250" DataField="moduleName">
              <ItemStyle Width="250px"></ItemStyle>
            </telerik:GridBoundColumn>
        </Columns>
    </mastertableview>
</telerik:RadGrid>

Code behind :

protected void RadGrid1_NeedDataSource(object source, Telerik.Web.UI.GridNeedDataSourceEventArgs e)
{
    if (!e.IsFromDetailTable)
    {
        DataTable modulesTable = new DataTable();
        modulesTable.Columns.Add("moduleSelected", typeof( bool ));
        modulesTable.Columns.Add("moduleId", typeof( int ));
        modulesTable.Columns.Add("moduleName", typeof( string ));

        Random r = new Random(123456);
        for( int i = 0; i < 10; i++ )
        {
            int nId = r.Next(0, 10);

            // USE IsPostBack properties to see if the grid is correctly rebinded
            modulesTable.Rows.Add(IsPostBack, nId, "Module " + nId);
        }

        RadGrid1.DataSource = modulesTable;
    }

}

protected void RadGrid1_DetailTableDataBind(object source, Telerik.Web.UI.GridDetailTableDataBindEventArgs e)
{
    GridDataItem parentDataItem = (GridDataItem)e.DetailTableView.ParentItem;
    int nParentModuleId = (int)parentDataItem.GetDataKeyValue("moduleId");

    DataTable dependenciesTable = new DataTable();
    dependenciesTable.Columns.Add("childModuleSelected", typeof(bool));
    dependenciesTable.Columns.Add("childModuleId", typeof(int));
    dependenciesTable.Columns.Add("childModuleName", typeof(string));

    Random r = new Random(123456);
    for (int i = 0; i < 3; i++)
    {
        int nId = r.Next(0, 10);
        dependenciesTable.Rows.Add(false, nId, "Module " + nId);
    }

    e.DetailTableView.DataSource = dependenciesTable;
}

protected void Timer1_Tick(object sender, EventArgs e)
{
    RadGrid1.Rebind();
}

Thanks in advance.

[Yavor]

Hi bronv,

To see more information along the lines of the requested functionality, please refer to the following article.
I hope this helps.

Sincerely yours,
Yavor
the Telerik team

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