Feed data from database into ListView and ListBox : Database ListView « Database ADO.net « VB.Net






Feed data from database into ListView and ListBox

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


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.ComponentModel.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 OrderIDsList As System.Windows.Forms.ListBox
    Friend WithEvents Button1 As System.Windows.Forms.Button
    Friend WithEvents Label1 As System.Windows.Forms.Label
    Friend WithEvents OrderDetailsList As System.Windows.Forms.ListView
    Friend WithEvents Label2 As System.Windows.Forms.Label
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.OrderIDsList = New System.Windows.Forms.ListBox()
        Me.Button1 = New System.Windows.Forms.Button()
        Me.Label1 = New System.Windows.Forms.Label()
        Me.OrderDetailsList = New System.Windows.Forms.ListView()
        Me.Label2 = New System.Windows.Forms.Label()
        Me.SuspendLayout()
        '
        '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 = 0
        '
        'Button1
        '
        Me.Button1.Location = New System.Drawing.Point(504, 400)
        Me.Button1.Name = "Button1"
        Me.Button1.TabIndex = 1
        Me.Button1.Text = "Start"
        '
        '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 = 2
        Me.Label1.Text = "Order IDs"
        '
        '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 = 3
        '
        '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 = 4
        Me.Label2.Text = "Order Details"
        '
        '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 con As New SqlConnection( _
      "Server=(local)\SQLEXPRESS;Initial Catalog=Northwind;Integrated Security=SSPI")

    Private Sub Button1_Click(ByVal sender As System.Object, _
                              ByVal e As System.EventArgs) Handles Button1.Click

        Dim cmd As New SqlCommand("SELECT ID FROM Employee", con)
        Try
            con.Open()
            Dim reader As SqlDataReader = cmd.ExecuteReader()
            While reader.Read()
                OrderIDsList.Items.Add(reader.GetInt32(0))
            End While
            reader.Close()
        Finally
            con.Close()
        End Try
    End Sub

    Private ColumnsSet As Boolean = False

    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 New SqlCommand("CustOrdersDetail", con)
        With StoredProcCommand
            .CommandType = CommandType.StoredProcedure
            .Parameters.Add("@OrderID", OrderID)
        End With

        Dim RowList As New ArrayList()

        Try
            con.Open()
            Dim reader As SqlDataReader = StoredProcCommand.ExecuteReader()
            While reader.Read()
                Dim Values(reader.FieldCount) As Object
                reader.GetValues(Values)
                RowList.Add(Values)
            End While

            If Not ColumnsSet Then
                Dim schema As DataTable = reader.GetSchemaTable()
                SetColumnHeaders(schema)
            End If
            reader.Close()
        Finally
            con.Close()
        End Try

        PopulateOrderDetails(RowList)
    End Sub

    Private Sub SetColumnHeaders(ByVal schema As DataTable)

        OrderDetailsList.View = View.Details

        Dim row As DataRow
        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 New ListViewItem(OrderDetails)
            OrderDetailsList.Items.Add(NewItem)
        Next
    End Sub
End Class

           
       








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