Identifying whether RadGrid (in RadAjaxManager) or Page_Load calls NeedDataSource()

[G S S]

Hi,

I need to identify, when calling NeedDataSource() on my RADGrid, whether the action to invoke this is the RADMenu click (server-side click event handler for this control calls NeedDataSource()) or Page_Load, which calls likewise.

My RADGrid is in a RADAjaxManager:

            

                                  <telerik:RadAjaxManager ID="AjaxManager1" runat="server" EnableHistory="True">
                                                                                <AjaxSettings>
                                                                                    <telerik:AjaxSetting AjaxControlID="RadTreeView1">
                                                                                        <UpdatedControls>
                                                                                            <telerik:AjaxUpdatedControl ControlID="RadTreeView1" />
                                                                                                    <telerik:AjaxUpdatedControl />
                                                                                            <telerik:AjaxUpdatedControl ControlID="RadGrid1" LoadingPanelID="RadAjaxLoadingPanel1" />
                                                                                            </UpdatedControls>
                                                                                   </telerik:AjaxSetting>
                                                                             </AjaxSettings>
                                                                            </telerik:RadAjaxManager>

Thus, will the below work?

        RadMenu test = source as RadMenu;

So if this is null, RadMenu could not be invoking the event handler and thus it must be Page_Load. I am not soure if object source is like object sender, and if I should replace RadMenu with RadAjaxManager?


Thanks

[Princy]

Hello,

You can check for the control which invokes the postback using following code. I hope this will help.

CS:

protected void RadGrid1_NeedDataSource(object source, Telerik.Web.UI.GridNeedDataSourceEventArgs e)
    {
        RadGrid1.MasterTableView.DataSource = GetDataTable("SELECT * FROM Customers");

        if (IsPostBack)
        {
            if (getPostBackControlName() == "RadMenu1") // Check for the control id which invokes the postback
            {
                Response.Write("RadMenu");
            }
        }
    }

private string getPostBackControlName()
    {
        Control control = null;
        string ctrlname = Page.Request.Params["__EVENTTARGET"];

        if (ctrlname != null && ctrlname != String.Empty)
        {
            control = Page.FindControl(ctrlname);
        }
        // if __EVENTTARGET is null, the control is a button type and we need to
        // iterate over the form collection to find it
        else
        {
            string ctrlStr = String.Empty;

            Control c = null;

            foreach (string ctl in Page.Request.Form)
            {
                if (ctl.EndsWith(".x") || ctl.EndsWith(".y"))
                {
                    ctrlStr = ctl.Substring(0, ctl.Length - 2);
                    c = Page.FindControl(ctrlStr);
                }
                else
                {
                    c = Page.FindControl(ctl);
                }
                if (c is System.Web.UI.WebControls.Button || c is System.Web.UI.WebControls.ImageButton)
                {
                    control = c;
                    break;
                }
            }
        }
        return control.ID;
    }
protected void RadMenu1_ItemClick(object sender, Telerik.Web.UI.RadMenuEventArgs e)
    {
        RadGrid1.Rebind();
    }

Thanks,
Princy.