VB.Net/Database ADO.net/OleDb SQL Server Connection String

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OleDb SQL server Express Connection string

<source lang="vbnet"> Imports System Imports System.Collections Imports System.Data Imports System.IO Imports System.Xml.Serialization Imports System.Xml Imports System.Windows.Forms Imports System.Data.SqlClient Imports System.Data.OleDb Public Class MainClass

   Shared Sub Main()
       Dim form1 As Form = New Form1
       Application.Run(form1)
   End Sub

End Class


Public Class Form1

   Inherits System.Windows.Forms.Form
  1. Region " Windows Form Designer generated code "
   Public Sub New()
       MyBase.New()
       "This call is required by the Windows Form Designer.
       InitializeComponent()
       "Add any initialization after the InitializeComponent() call
   End Sub
   "Form overrides dispose to clean up the component list.
   Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
       If disposing Then
           If Not (components Is Nothing) Then
               components.Dispose()
           End If
       End If
       MyBase.Dispose(disposing)
   End Sub
   "Required by the Windows Form Designer
   Private components As System.ruponentModel.IContainer
   "NOTE: The following procedure is required by the Windows Form Designer
   "It can be modified using the Windows Form Designer.  
   "Do not modify it using the code editor.
   Friend WithEvents Label2 As System.Windows.Forms.Label
   Friend WithEvents OrderDetailsList As System.Windows.Forms.ListView
   Friend WithEvents Label1 As System.Windows.Forms.Label
   Friend WithEvents Button1 As System.Windows.Forms.Button
   Friend WithEvents OrderIDsList As System.Windows.Forms.ListBox
   <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
       Me.Label2 = New System.Windows.Forms.Label()
       Me.OrderDetailsList = New System.Windows.Forms.ListView()
       Me.Label1 = New System.Windows.Forms.Label()
       Me.Button1 = New System.Windows.Forms.Button()
       Me.OrderIDsList = New System.Windows.Forms.ListBox()
       Me.SuspendLayout()
       "
       "Label2
       "
       Me.Label2.Location = New System.Drawing.Point(232, 8)
       Me.Label2.Name = "Label2"
       Me.Label2.Size = New System.Drawing.Size(216, 23)
       Me.Label2.TabIndex = 9
       Me.Label2.Text = "Order Details"
       "
       "OrderDetailsList
       "
       Me.OrderDetailsList.Location = New System.Drawing.Point(232, 32)
       Me.OrderDetailsList.Name = "OrderDetailsList"
       Me.OrderDetailsList.Size = New System.Drawing.Size(352, 360)
       Me.OrderDetailsList.TabIndex = 8
       "
       "Label1
       "
       Me.Label1.Location = New System.Drawing.Point(8, 8)
       Me.Label1.Name = "Label1"
       Me.Label1.Size = New System.Drawing.Size(216, 23)
       Me.Label1.TabIndex = 7
       Me.Label1.Text = "Order IDs"
       "
       "Button1
       "
       Me.Button1.Location = New System.Drawing.Point(504, 400)
       Me.Button1.Name = "Button1"
       Me.Button1.TabIndex = 6
       Me.Button1.Text = "Start"
       "
       "OrderIDsList
       "
       Me.OrderIDsList.ItemHeight = 16
       Me.OrderIDsList.Location = New System.Drawing.Point(8, 32)
       Me.OrderIDsList.Name = "OrderIDsList"
       Me.OrderIDsList.Size = New System.Drawing.Size(216, 356)
       Me.OrderIDsList.TabIndex = 5
       "
       "Form1
       "
       Me.AutoScaleBaseSize = New System.Drawing.Size(6, 15)
       Me.ClientSize = New System.Drawing.Size(592, 432)
       Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.Label2, Me.OrderDetailsList, Me.Label1, Me.Button1, Me.OrderIDsList})
       Me.Name = "Form1"
       Me.Text = "Form1"
       Me.ResumeLayout(False)
   End Sub
  1. End Region
   Private Const ConnString As String = _
       "Provider=SQLOLEDB;Data Source=(local)\SQLEXPRESS;Initial Catalog=Northwind;Integrated Security=SSPI;"
   Private Connection As OleDbConnection = New OleDbConnection(ConnString)
   Private ColumnsSet As Boolean = False
   Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
       Dim command As OleDbCommand = _
           New OleDbCommand("SELECT OrderID FROM Orders", Connection)
       Connection.Open()
       Dim reader As OleDbDataReader = command.ExecuteReader()
       Do While (reader.Read())
           OrderIDsList.Items.Add(reader.GetInt32(0))
       Loop
       reader.Close()
       Connection.Close()
   End Sub
   Private Sub OrderIDsList_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles OrderIDsList.SelectedIndexChanged
       Dim OrderID As Integer = Convert.ToInt32(OrderIDsList.SelectedItem)
       Dim StoredProcCommand As OleDbCommand = New OleDbCommand("CustOrdersDetail", Connection)
       With StoredProcCommand
           .rumandType = CommandType.StoredProcedure
           .Parameters.Add("@OrderID", OrderID)
       End With
       Connection.Open()
       Dim RowList As ArrayList = New ArrayList()
       Dim reader As OleDbDataReader = StoredProcCommand.ExecuteReader()
       Do While reader.Read()
           Dim Values(reader.FieldCount) As Object
           reader.GetValues(Values)
           RowList.Add(Values)
       Loop
       If Not ColumnsSet Then
           Dim schema As DataTable = reader.GetSchemaTable()
           SetColumnHeaders(schema)
       End If
       reader.Close()
       Connection.Close()
       PopulateOrderDetails(RowList)
   End Sub
   Private Sub SetColumnHeaders(ByVal schema As DataTable)
       Dim row As DataRow
       OrderDetailsList.View = View.Details
       For Each row In schema.Rows
           OrderDetailsList.Columns.Add(row("ColumnName"), 100, HorizontalAlignment.Left)
       Next
       ColumnsSet = True
   End Sub
   Private Sub PopulateOrderDetails(ByVal RowList As ArrayList)
       OrderDetailsList.Items.Clear()
       Dim row As Object()
       For Each row In RowList
           Dim OrderDetails(row.Length) As String
           Dim col As Object
           Dim ColIdx As Integer
           For ColIdx = 0 To row.Length - 1
               OrderDetails(ColIdx) = Convert.ToString(row(ColIdx))
           Next
           Dim NewItem As ListViewItem = New ListViewItem(OrderDetails)
           OrderDetailsList.Items.Add(NewItem)
       Next
   End Sub

End Class

      </source>