根据选择行信息设置按纽状态

<SelectionModel>

    <ext:RowSelectionModel runat="server" SingleSelect="true">

        <Listeners>

            <RowSelect Handler="#{btnDeleteRecord}.enable();" />

            <RowDeselect Handler="if (!#{CompanyGridPanel}.hasSelection()) {#{btnDeleteRecord}.disable();}" />

        </Listeners>

    </ext:RowSelectionModel>

</SelectionModel>