Question

I am trying to connection to MS SQL SERVER 2008 database (students), i want to make sure:

1) If connection string that i made is OK

Dim connectionString As New SqlConnection("server=X86ONX64; database=students; Integrated Security=True")

2) How can i check if dataset is producing any results?

Code:

Public Class Form1

'Connection String + DataAdaptor + DataSet
'Declared Outside Any Subroutines/Functions

Dim connectionString As New SqlConnection("server=X86ONX64; database=students; Integrated Security=True")
Dim dataAdaptor As New SqlDataAdapter()
Dim objdataSet As New DataSet()


Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

    dataAdaptor.SelectCommand = New SqlCommand()
    dataAdaptor.SelectCommand.Connection = connectionString
    dataAdaptor.SelectCommand.CommandText = "select * from basic_info;"
    dataAdaptor.SelectCommand.CommandType = CommandType.Text

    connectionString.Open()

    dataAdaptor.Fill(objdataSet, "StudentInfo")

    connectionString.Close()

    grd.AutoGenerateColumns = True
    grd.DataSource = objdataSet
    grd.DataMember = "basic_info"




    dataAdaptor = Nothing
    connectionString = Nothing


End Sub

Answer 1

About your first question, If connection string that i made is OK

If you did not get any exceptions, you’ve successfully made the connection to your database.

About your second question.

There are two things you can do.

1. Debug the wrong way. (It works though)

   MsgBox(objdataSet.Tables[0].Rows.Count);

2. Learn and debug the correct way.

   Read these articles

   Debugging Basics
   Visual Studio Debugging
   Debugging Basics: Breakpoints

Anyway, learn how to use the debugger properly, put a break point, analyse the objdataSet object in a watch window and see if any results are present.