Public ReadOnly Property SelectedItem As MenuItem

Dim instance As MenuItemClickEventArgs
Dim value As MenuItem
 
value = instance.SelectedItem

public MenuItem SelectedItem {get;}

protected void Page_Load(object sender, System.EventArgs e)
{
if (this.IsPostBack) return;
FpSpread1.EnableContextMenu = true;
FarPoint.Web.Spread.ContextMenu rowHeaderContextMenu = new FarPoint.Web.Spread.ContextMenu();
rowHeaderContextMenu.Type = FarPoint.Web.Spread.ContextMenuType.RowHeader;
FarPoint.Web.Spread.MenuItem rowHeaderItem = new FarPoint.Web.Spread.MenuItem("RowHeader item 1");
rowHeaderItem.ChildItems.Add(new FarPoint.Web.Spread.MenuItem("Child item 1"));
rowHeaderItem.ChildItems.Add(new FarPoint.Web.Spread.MenuItem("Child item 2"));
rowHeaderItem.ChildItems[1].Visible = true;
rowHeaderItem.ChildItems[0].CommandName = "1st";
rowHeaderItem.ChildItems[1].CommandName = "test";
rowHeaderItem.ChildItems[0].CommandArgument = "arg0";
rowHeaderItem.ChildItems[1].CommandArgument = "arg1";
rowHeaderContextMenu.Items.Add(rowHeaderItem);
FpSpread1.ContextMenus.Add(rowHeaderContextMenu); 
}

 protected void FpSpread1_MenuItemClicked(object sender, FarPoint.Web.Spread.MenuItemClickEventArgs eventArgs)
        {
            FpSpread1.Sheets[0].Cells[1,1].Text = eventArgs.SelectedItem.CommandName.ToString();
            FpSpread1.Sheets[0].Cells[1, 2].Text = eventArgs.SelectedItem.CommandArgument.ToString();
        }

Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
If (IsPostBack) Then
    Return
End If
FpSpread1.EnableContextMenu = True
'If the RowHeader context menu has not been added, add it here 
Dim rowHeaderContextMenu As New FarPoint.Web.Spread.ContextMenu()
rowHeaderContextMenu.Type = FarPoint.Web.Spread.ContextMenuType.RowHeader
Dim rowHeaderItem As New FarPoint.Web.Spread.MenuItem("RowHeader item 1")
rowHeaderItem.ChildItems.Add(New FarPoint.Web.Spread.MenuItem("Child item 1"))
rowHeaderItem.ChildItems.Add(New FarPoint.Web.Spread.MenuItem("Child item 2"))
rowHeaderItem.ChildItems(1).Visible = True
rowHeaderItem.ChildItems(0).CommandName = "1st"
rowHeaderItem.ChildItems(1).CommandName = "test"
rowHeaderItem.ChildItems(0).CommandArgument = "arg0"
rowHeaderItem.ChildItems(1).CommandArgument = "arg1"
rowHeaderContextMenu.Items.Add(rowHeaderItem)
FpSpread1.ContextMenus.Add(rowHeaderContextMenu)
End Sub

Protected Sub FpSpread1_MenuItemClicked(sender As Object, eventArgs As FarPoint.Web.Spread.MenuItemClickEventArgs) Handles FpSpread1.MenuItemClicked
FpSpread1.Sheets(0).Cells(1,1).Text = eventArgs.SelectedItem.CommandName.ToString()
FpSpread1.Sheets(0).Cells(1, 2).Text = eventArgs.SelectedItem.CommandArgument.ToString()
End Sub