Hi Rolf,

If you still want to use the default ContextMenu, you can add via clientside and use a SendCustomRequest function to handle a serverside function.

I have attach s sample for your scenario.

Hope this help and have a nice day.

Best regards,

Niven Prasetya

Thx alot for your reply :)

I got it to work with your example:

function WebGrid1_OnColumnContextMenu(controlId, col, menu, isGroup, location)
        {
            var separator = new WebMenuItem();    
            separator.Type = "Separator";       
            separator.Name = "MySeparator";          
            var menuItemGem = new WebMenuItem();    
            menuItemGem.Text = "Save Layout";    
            menuItemGem.Name = "LayoutSave";    
            menuItemGem.OnClick = "SaveLayoutValue";
            
            var menuItemGendan = new WebMenuItem();    
            menuItemGendan.Text = "Get Default Layout";    
            menuItemGendan.Name = "DefaultLayout";    
            menuItemGendan.OnClick = "DefaultLayoutValue";
            // Add Menu Separator and Menu Item    
            menu.Items.Add(separator);    
            menu.Items.Add(menuItemGem);
            menu.Items.Add(menuItemGendan);
        }
	
	    function SaveLayoutValue() {
            var grid = ISGetObject("WebGrid1");
            var key = "LayoutSave" //
            grid.AddInput("key", key);
            grid.SendCustomRequest();
        }
        function DefaultLayoutValue() {
            var grid = ISGetObject("WebGrid1");
            var key = "LayoutDefault"
            grid.AddInput("key", key);
            grid.SendCustomRequest();
        }

Serverside it calls:

    Private Sub WebGrid1_InitializePostBack(ByVal sender As System.Object, ByVal e As ISNet.WebUI.WebGrid.PostbackEventArgs) Handles WebGrid1.InitializePostBack
        If Not e.Action <> ISNet.WebUI.WebGrid.PostBackAction.Custom Then
            Select Case Request("key")
                Case "LayoutSave"                     
                    ucASPLPGridLayoutCtl.GridLayoutOptions(Request("key"))
                Case "DefaultLayout"
                    ucASPLPGridLayoutCtl.GridLayoutOptions(Request("key"))
                    Response.Redirect(Request.Url.ToString)
            End Select
        End If
    End Sub

And its working.

Best Regards Rolf