How to get the page records from radgrid when click on button

I am using Telerik RadGrid.i bind the data (i.e 10 rows) to radgrid with paging .the paging was set to 5 per page.the radgrid as Hirarchial mode.

i am get the first pag开发者_运维问答e records only when user click on button.which i need to send a mail.how can retrive all the data

RadGridAllocateEmployee.AllowPaging = False
RadGridAllocateEmployee.Rebind()
        'Your code
For Each item As GridDataItem In RadGridAllocateEmployee.MasterTableView.Items
. . . . . . .
Next
RadGridAllocateEmployee.AllowPaging = True
RadGridAllocateEmployee.Rebind()