redirecting to same page by post back url by id

See more:

ASP.NET

SQL

I am using an asp.net ImageButton for post back url. In user.aspx page there are images of other users within a datalist.

I want when I click any of those pictures the selected user s details should display on the user page. What do I have to do for that.

In my ImageButton I use post back url like this

<asp:ImageButton ID="ImageButton1" runat="server" ImageUrl='<%# GetImageURL(Eval("Pic")) %>' PostBackUrl='<%# Eval("id", "user.aspx?id={0}") %>'/>

and in page load code

Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
    If Session("UName") Is Nothing Then
        Response.Redirect("login.aspx")
    Else
        If Not (IsPostBack) Then
            binddata()
            binddata1()
            binddata2()
        End If
    End If
End Sub

and use query string on databind like this

Sub binddata()
    Dim mycommand As New SqlCommand("SELECT * FROM details where id = @id", con)
    mycommand.Parameters.Add("@id", SqlDbType.Int)
    mycommand.Parameters("@id").Value = Convert.ToInt32(Request.QueryString("id"))
    con.Open()
    userData.DataSource = mycommand.ExecuteReader
    userData.DataBind()
    con.Close()
End Sub

but it is not working. I am not able to catch where I am going wrong. Please help me with this.

[edit] - formatted code blocks and some minor grammer changes