VB.Net/Database ADO.net/OleDb SQL Server Connection String — различия между версиями
Admin (обсуждение | вклад) м (1 версия) |
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Версия 19:40, 26 мая 2010
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
- 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
- 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
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