Using Query String Parameters on Page_load to db Retrieval

I want to take Query string parameters sent from another asp.net page and use them to do a sql query. I am getting in where clause variable is being used before assigned. The previous if statements assign the variable. I've included code:

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        Dim myGroupId As String
        Dim myStringMember As String
        Dim mySQLQuery As String

        If (Request.QueryString("grpId") <> Nothing) Then
            myGroupId = Request.QueryString("grpId").ToString().Trim()
        End If

        If (Request.QueryString("memId") <> Nothing) Then
            myStringMember = Request.QueryString("memId").ToString().Trim()
        End If

        mySQLQuery = "SELECT EENAMF, EENAML, EEGRP, EESSN, EECERT, EEIDNO, EEBDMT || '-' || EEBDDY ||  '-' || EEBDCY || EEBDYR AS BIRTHDT from Loomis.testprod.EMPMSTR WHERE EESSN = ('" & myStringMember & "')" & " and " & "(" & "EEGRP='" & myGroupId & "')"""

        SqlDataSourcePersonal.SelectCommand = mySQLQuery

        GridViewPersonal.DataBind()
    End SubStart Free Trial