How to add a delete button in datalist/datatable?

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I am making a website using vb .net

I have a datalist which has a datatable and delete button. the output llooks some thing like this below. 'X' is the delete button.

---------------------
| X name1 | X name3 |
| X name2 | X name4 |
---------------------

When user click on the delete button(X) i want to get the id of that button and use that to delete a record in database.

    <asp:DataList ID="DataList1" runat="server" RepeatColumns="3" RepeatLayout="Table" DataKeyField="ID" OnDeleteCommand="DataList1_DeleteCommand">
        <ItemTemplate>
            <asp:ImageButton  ID="imgdeletebtn" ImageUrl="x-icon.png" runat="server" />
            <%# DataBinder.Eval(Container.DataItem, "StringValue") %>
        </ItemTemplate>
    </asp:DataList>

    Protected Sub DataList1_DeleteCommand(ByVal source As Object, ByVal e As DataListCommandEventArgs)
        Dim getID As Integer = CInt(DataList1.DataKeys(CInt(e.Item.ItemIndex)))
        ErrorL.Text = getID

        Dim deletedQuery As String = "DELETE FROM [table_name] WHERE [ID] = '" & getID & "'"        
    End Sub

i am new to VB .net and I cant seem to figure this out. I want to send the id in back end so i can delete that record.