Passing A Querystring To A Insert Statment.

Hi, I'm having problems passing a querystring from the datanavigateurlformatstring to be used in a insert sp on a webform.  Please can someone take a look at my code and point me in the right direction.   At the moment I'm gettingthis error messageCompiler Error Message: BC30451: Name 'userid' is not declared.  but in the url i can see the querystring I've passed from the previous page.

Thanks in advance Dave

 1 Protected Sub Execute_Clicked(ByVal sender As Object, ByVal e As EventArgs)
2
3 Dim objConn As New System.Data.SqlClient.SqlConnection()
4 objConn.ConnectionString = "My connection string"
5 objConn.Open()
6 Dim objCmd As New System.Data.SqlClient.SqlCommand("test_insert", objConn)
7 objCmd.CommandType = System.Data.CommandType.StoredProcedure
8
9
10 Dim puserid As System.Data.SqlClient.SqlParameter = objCmd.Parameters.Add("@userid", System.Data.SqlDbType.Int)
11 Dim pdate As System.Data.SqlClient.SqlParameter = objCmd.Parameters.Add("@date", System.Data.SqlDbType.DateTime)
12 Dim papplicants As System.Data.SqlClient.SqlParameter = objCmd.Parameters.Add("@applicants", System.Data.SqlDbType.Int)
13 Dim pclients As System.Data.SqlClient.SqlParameter = objCmd.Parameters.Add("@clients", System.Data.SqlDbType.Int)
14 Dim pcontacts As System.Data.SqlClient.SqlParameter = objCmd.Parameters.Add("@contacts", System.Data.SqlDbType.Int)
15
16
17
18
19
20 puserid.Direction = System.Data.ParameterDirection.Input
21 puserid.Value = Convert.ToInt32(userid.QueryString)
22 pdate.Direction = System.Data.ParameterDirection.Input
23 pdate.Value = Convert.ToDateTime([date].Text)
24 papplicants.Direction = System.Data.ParameterDirection.Input
25 papplicants.Value = Convert.ToInt16(applicants.Text)
26 pclients.Direction = System.Data.ParameterDirection.Input
27 pclients.Value = Convert.ToInt16(clients.Text)
28 pcontacts.Direction = System.Data.ParameterDirection.Input
29 pcontacts.Value = Convert.ToInt16(contacts.Text)
30
31
32
33 command.ExecuteNonQuery()
34
35
36 objConn.Close()
37
38 End Sub