[Solved] Select all check box in the header

[Mohamed Salah Al-Din]

Dear Sir,
As you can see in the attached image, the GridClientSelectColumn is still selected even if i deselect on row.
which is not an expected behaviour.
can you tell me how to solve this issue?

<telerik:RadGrid
    ID="GRD_Instances_Private"
    Skin="Vista"
    AutoGenerateColumns="False"
    AllowMultiRowSelection="True"
    runat="server"
    GridLines="None">
    <MasterTableView
            ShowFooter="false"
            CommandItemDisplay="Top"
            DataKeyNames="ActivityUID,InstanceUID,Activity,Process"
            ShowHeadersWhenNoRecords="true"
            Dir="RTL"
            HorizontalAlign="Center">
            <Columns>
                    <telerik:GridClientSelectColumn UniqueName="CheckboxSelectColumn">
                        <ItemStyle HorizontalAlign="Center" VerticalAlign="Middle" Width="5%" />
                        <HeaderStyle HorizontalAlign="Center" VerticalAlign="Middle" Width="5%" />
                    </telerik:GridClientSelectColumn>
        </Columns>
    </MasterTableView>
        <ClientSettings EnableRowHoverStyle="true" EnableAlternatingItems="true">
            <Selecting AllowRowSelect="True" />
            <ClientEvents OnRowContextMenu="RowContextMenu_Private" OnRowDblClick="RowDblClick" />
        </ClientSettings>
</telerik:RadGrid>

[Princy]

Hello Mohamed,

Check out the follwoing code library submission which demonstrates on setting the "Select All" checkbox unchecked, if a single check box (row) is unchecked (unselected). The solution allows you to extract the client ids of each SelectAll checkbox from the tables in the grid hierarchy and later use it on the client.
GridClientSelectColumn -- (un)check "Select All" check box automatically

Thanks
Princy.