How to Modify SQLDataSource Form Parameters on the fly

I have a datagridview attached to a SQL stored procedure that accepts 2 arguments. One is the employee number and the second is the level of access a user has. I have 2 hidden text box controls on the page that will drive the stored procedure. One is call txtEmployeeNumber and the other is txtAccessLevel. I use 2 functions to pull the currently logged on user's employee number and searches that employee number to figure out if they are an Admin, SuperUser, or just a normal User(Default Option).

Current ASP Markup:
<asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent">
    <asp:TextBox ID="txtEmployeeNumber" runat="server"></asp:TextBox>
&nbsp;
    <asp:TextBox ID="txtAccessLevel" runat="server"></asp:TextBox>
    <br />
    <%
        txtAccessLevel.Text = CamIMS.pt_Functions.AccessLevel(CamIMS.pt_Functions.GetEmployeeNumber())
        txtEmployeeNumber.Text = CamIMS.pt_Functions.GetEmployeeNumber()
        %>

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I then reference those controls in the SQLDataSOurce:
<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:IMSConnectionString %>" SelectCommand="EmployeeBalances" SelectCommandType="StoredProcedure">
        <SelectParameters>
            <asp:ControlParameter ControlID="txtAccessLevel" Name="type" PropertyName="Text" Type="String" />
            <asp:ControlParameter ControlID="txtEmployeeNumber" Name="EmployeeNumber" PropertyName="Text" Type="Int32" />
        </SelectParameters>
    </asp:SqlDataSource>

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The problem I have is that the text boxes remain blank. I have tried setting this in the Page_load area with no luck either. I know this is probably not the best way to do this, so I am open to any suggestions.
tekkieguruAsked:
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CodeCruiserCommented:
Not a very secure approach in my opinion.

Problem is that by the time you have set the textboxes, the SQLDataSource has already retrieved data.


I would suggest that when user logs in, you retrieve the employee ID and access level and store it in the session. Then on this page, use SessionParameter instead of ControlParameter. Example on below link

http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.sessionparameter(v=vs.110).aspx
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