I changed ObjectDataSource's SelectMethod but it still returns old values on GridView

I have this two diferent classes to use in my ObjectDataSource:

"getColection" and "getLastColectionByUser"

This is my ObjectDataSource at aspx.

`

  <asp:ObjectDataSource ID="ObjectDataSource1" runat="server"          SelectMethod="getColection"TypeName="HepatiteNegocio.ViewProtocoloCol" SelectCountMethod="getColectionCount"
    EnablePaging="True">
    <SelectParameters>
        <asp:Parameter Name="pWhere" Type="String" />
        <asp:Parameter Name="pOrderBY" Type="String" />
        <a开发者_开发百科sp:Parameter Name="startRowIndex" Type="Int32" />
        <asp:Parameter Name="maximumRows" Type="Int32" />
    </SelectParameters>
</asp:ObjectDataSource>`

If radio button selected value is "all" select method is "getColection" else is "getLastColectionByUser", all right?

          `if(radioButton.SelectedValue.Equals("all"))
        {
            ObjectDataSource1.SelectMethod = "getColection";
            ObjectDataSource1.SelectCountMethod = "getColectionCount";

            try
            {
                validation();

                ObjectDataSource1.SelectParameters[0].DefaultValue = getWhere();
                ObjectDataSource1.SelectParameters[1].DefaultValue = "protocolNumber";

            }
            catch
            {
                set an error message
            }
        }
        else  
        {
            ObjectDataSource1.SelectMethod = "getLastColectionByUser";
            ObjectDataSource1.SelectCountMethod = "getLastCountColectionByUser";
            try
            {
                validation();
                ObjectDataSource1.SelectParameters[0].DefaultValue = getWhere();
                ObjectDataSource1.SelectParameters[1].DefaultValue = "protocolNumber";
            }
            catch
            {
                set an erron message
            }
        } 
        ObjectDataSource1.DataBind();
        GridView1.DataBind();`

When I debug it works fine. The SelectMethod and SelectCountMethod are changing BUT the gridView is still showing old values. The Classes are ok. What is going wrong?

You are probably changing the SelectMethod property after the ObjectDataSource is bound. Try adding ObjectDataSource1.DataBind(); at the end of the procedure you listed as a quick fix.

What event handler is the code running in?