how to create a string from a value in datagrid

I have a value in a field that is either 1 or 2.  If it's 2, I want to add the word 'Test' to my URL, e.g.

'questiontest.aspx?questionid=2'

if it's 1 I want to go to

'question.aspx?questionid=1'

Here's my code currently:


 <asp:TemplateField HeaderText="Question" ItemStyle-Width="100px">
            <ItemTemplate>
                <asp:HyperLink ID="LinkQuestion" runat="server" Text='<%# string.Format("Question {0}", Eval("SortOrder")) %>'
                    NavigateUrl='<%# string.Format("~/Question{2}?question={0}&sort={1}", Eval("QuestionID"), Eval("SortOrder"), ??? %>' />
            </ItemTemplate>
        </asp:TemplateField>

How can I set the parameter {2} to be 'test' if the question field is 2?