I Hava Program Mssql Insert

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs)

If Page.IsPostBack Then

binddata()

End If

End Sub

Sub binddata()

baglanti = New SqlConnection("Data Source=.SQLEXPRESS;AttachDbFilename=|DataDirectory|datagoldbar.mdf;Integrated Security=True;User Instance=True")

End Sub

Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs)

Dim cmd As New SqlCommand("INSERT INTO db " & _

"(ip,sehir,mesaj,email) VALUES (@ip, " & _

"@sehir,@mesaj,@email)", baglanti)

cmd.Parameters.Add("@ip", SqlDbType.NVarChar, 50).Value = isim.Text

cmd.Parameters.Add("@sehir", SqlDbType.NChar, 50).Value = sehir.Text

cmd.Parameters.Add("@mesaj", SqlDbType.NText).Value = mesaj.Text

cmd.Parameters.Add("@email", SqlDbType.NVarChar, 150).Value = email.Text

baglanti.Open()

cmd.ExecuteNonQuery()

binddata()

 

 

 

End Sub

Server Error in


 Object reference not set to an instance of an object.


where is mistake there?