请各位大虾看下那里出错了!!!!

至少一个参数没有被指定值。 (那里错了)
下面是代码:
    Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
     
        Dim objconn As New OleDbConnection
        objconn.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & Server.MapPath("mydb.mdb")
        objconn.Open()
        Dim objcmd As New OleDbCommand
        objcmd.Connection = objconn
        objcmd.Parameters.Add("@ID", OleDbType.Char).Value = TextBox1.Text
        objcmd.Parameters.Add("@密码", OleDbType.Char).Value = TextBox2.Text
        objcmd.Parameters.Add("@性别", OleDbType.Char).Value = TextBox3.Text
         = "insert into 信息表(ID,密码,性别) values (?,?,?)"
        objcmd.ExecuteNonQuery()
        objconn.Close()
        Response.Write("<script language='javascript'>alert('注册成功');</script>")
    End Sub


    Sub checkuser(ByVal sender As Object, ByVal e As ServerValidateEventArgs)
        Dim objconn As New OleDbConnection
        objconn.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & Server.MapPath("mydb.mdb")
        objconn.Open()
        Dim objcmd As New OleDbCommand
        objcmd.Connection = objconn
         = "select * from 信息表 where ID=' " & TextBox7.Text & " '"
        Dim objreader As OleDbDataReader = objcmd.ExecuteReader
        e.IsValid = Not (objreader.Read())
        objreader.Close()
        objconn.Close()
    End Sub

[[it] 本帖最后由 twtdd 于 2008-7-1 14:59 编辑 [/it]]

[[it] 本帖最后由 twtdd 于 2008-7-1 15:00 编辑 [/it]]