The TDN, dev2.intersoftpt.com, is using WebContextMenu to achieve the taskbar functionality. I have update the the attached sample to use WebContextMenu as well.

You could read in more detail regarding the WebContextMenu in the WebDesktop documentations in the article titled WebContextMenu.

You could use the OnEditingFormInitialize client side event to handle such scenario. We already provided a sample of this event handler in EventOrganizer.aspx WebScheduler sample. In the sample, the originalObject variable will hold all the information regarding the event shown in the edit form.

Export client side event will require at least 3 parameter:

• tblName ( string ) - The name of the table to be exported.

• exportType ( string ) - The type of the exported document, e.g: "HTML", "PDF".

• pageOrientation ( string ) - The page orientation of the exported document, e.g: "PORTRAIT", "LANDSCAPE".
  

var grid = ISGetObject('WebGrid1');
grid.ExportGrid("Customers", "PDF", "PORTRAIT"); 

In order to automatically recalculate the group sum you will need to refresh the grid. You could achieve this by invoking the refreshGrid script from UpdateRow server side event handler. Here is the snippet:

UpdateRow event handler:

protected void WebGrid1_UpdateRow(object sender, ISNet.WebUI.WebGrid.RowEventArgs e)
{
    WebGrid1.ClientAction.InvokeScript("refreshGrid()");
}

RefreshGrid client side function:

function refreshGrid() {
    setTimeout(function() {
        var grid = ISGetObject("WebGrid1");
        grid.Refresh();
    }, 50);      
}

In my environment, the markup will not allow me to open the ColumnSet designer as well. Did the markup is a result from using the ColumnSet designer? If so could you provide us with the WebGrid and WebUI Framework dll you are using?

For the ColumnSet designer to work, I have to modify the mark up to be:

<ColumnSets>
    <ISWebGrid:WebGridColumnSet Caption="test" Name="csEmpty" Width="150px" 
        ColumnCount="1">
        <Layout>
            <ISWebGrid:WebGridRowLayout ColumnMember="EmployeeID" Width="150"/>
        </Layout>
        <HeaderStyle HorizontalAlign="Center" />
    </ISWebGrid:WebGridColumnSet>
</ColumnSets>
<ColumnSetSettings RowCount="1" ShowHeaders="Yes" GridLineColor="DarkGray" GridLines="Both"/>

Adding the property will allow me to open the ColumnSet designer in my environment.