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Class untuk menghubungkan antara vb.net dengan sql server.

Dibawah ini merupakan coding untuk menghubungkan antara vb.net dengan sql server.
Silahkan copi pastekan ke class yang telah anda buat.


Ingat!!!
Silahkan gantiData Source=.;Initial Catalog=DBME48;Integrated Security=True" menggunakan server komputer anda masing-masing. Karna itu merupakan server yang akan digunakan untuk menghubungkan antara vb.net dengan sql server.


Imports System.Data.SqlClient
Imports System.Data
Public Class CLSKoneksi
    Protected sql As String
    ' Protected conn as SqlClient.SqlConnection
    Protected conn As SqlConnection
    Protected cmd As SqlCommand
    Protected da As SqlDataAdapter

    Protected ds As DataSet
    Protected dt As DataTable

    Public Function openConn() As Boolean
        sql = "Data Source=.;Initial Catalog=DBME48;Integrated Security=True"
        conn = New SqlConnection(sql)
        conn.Open()

        If conn.State <> ConnectionState.Open Then
            Return False
        Else
            Return True
        End If

        Return False
    End Function

    Public Sub closeConn()

        If Not IsNothing(conn) Then
            conn.Close()
            conn = Nothing
        End If

    End Sub

    Public Sub ExecuteNonQuery(ByVal query As String)
        If Not openConn() Then
            MsgBox("Koneksi Gagal", MsgBoxStyle.Critical, "Informasi")
            Exit Sub ' break
        End If

        cmd = New SqlCommand
        cmd.Connection = conn
        cmd.CommandType = CommandType.Text
        cmd.CommandText = query
        cmd.ExecuteNonQuery()
        cmd = Nothing

        closeConn()
    End Sub

    Public Function reader(ByVal query As String) As DataTable
        If Not openConn() Then
            MsgBox("Koneksi Gagal", MsgBoxStyle.Critical, "Informasi")
            Return Nothing
            Exit Function ' break
        End If

        cmd = New SqlCommand(query, conn)
        da = New SqlDataAdapter
        da.SelectCommand = cmd

        ds = New DataSet
        da.Fill(ds)
        dt = ds.Tables(0)
        Return dt

        dt = Nothing
        ds = Nothing
        da = Nothing
        cmd = Nothing
        closeConn()
    End Function
End Class


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