can't add DataKeyNames into Grid View - asp.net

Question

I'm originally having problems with detecting the status of a checkbox in my grid View.
Apparently one of the solutions to the problem would be adding DataKeyNames value to the Grid View. But if i add DataKey value to my Grid View it's not being populated when I run the code.
Can anybody point me on my mistake?
here is the original head of the grid View which can be populated:
<asp:GridView ID="GridView1" runat="server" CellPadding="4" ForeColor="#333333"
GridLines="None" Width="1500px">
Here is the code after i add the DataKeyNames:
<asp:GridView ID="GridView1" runat="server" CellPadding="4" ForeColor="#333333"
GridLines="None" Width="1500px" DataKeyNames="account_id">
And here is the backend code to populate the gridView
Dim StrQwery As String = "SELECT account_id, account_name bla bla bla"
Dim smd As MySqlCommand
smd = New MySqlCommand(StrQwery, myconn)
smd.CommandType = CommandType.Text
Dim da As New MySqlDataAdapter(smd)
Dim cb As New MySqlCommandBuilder(da)
Dim ds As New DataSet()
da.Fill(ds)
GridView1.DataSource = ds.Tables(0)
GridView1.DataBind()
I can't understand why the values are not filled in Grid View after I add DatakeyNames
the entire code of Grid View
<asp:GridView ID="GridView1" runat="server" CellPadding="4" ForeColor="#333333"
GridLines="None" Width="1500px" >
<Columns>
<asp:TemplateField >
<ItemTemplate>
<asp:CheckBox ID="CheckBox1" runat="server" textAlign="right"
/>
</ItemTemplate>
</asp:TemplateField>
</Columns>
<AlternatingRowStyle BackColor="White" />
<EditRowStyle BackColor="#2461BF" />
<FooterStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
<HeaderStyle BackColor="#507CD1" Font-Bold="True" ForeColor="White" />
<PagerStyle BackColor="#2461BF" ForeColor="White" HorizontalAlign="Center" />
<RowStyle BackColor="#EFF3FB" />
<SelectedRowStyle BackColor="#D1DDF1" Font-Bold="True" ForeColor="#333333" />
<SortedAscendingCellStyle BackColor="#F5F7FB" />
<SortedAscendingHeaderStyle BackColor="#6D95E1" />
<SortedDescendingCellStyle BackColor="#E9EBEF" />
<SortedDescendingHeaderStyle BackColor="#4870BE" />
</asp:GridView>