VB.Net/Database ADO.net/Database ListView
Feed data from database into ListView and ListBox
<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
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 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
.rumandType = 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
</source>
Read data and feed into ListBox and ListView using OleDb
<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
</source>
Read data table schema and output to a ListView
<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
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 Button1 As System.Windows.Forms.Button
Friend WithEvents SchemaTableList As System.Windows.Forms.ListView
<System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
Me.SchemaTableList = New System.Windows.Forms.ListView()
Me.Button1 = New System.Windows.Forms.Button()
Me.SuspendLayout()
"
"SchemaTableList
"
Me.SchemaTableList.Dock = System.Windows.Forms.DockStyle.Top
Me.SchemaTableList.Name = "SchemaTableList"
Me.SchemaTableList.Size = New System.Drawing.Size(880, 512)
Me.SchemaTableList.TabIndex = 0
"
"Button1
"
Me.Button1.Location = New System.Drawing.Point(736, 520)
Me.Button1.Name = "Button1"
Me.Button1.Size = New System.Drawing.Size(136, 23)
Me.Button1.TabIndex = 1
Me.Button1.Text = "Read Schema"
"
"Form1
"
Me.AutoScaleBaseSize = New System.Drawing.Size(6, 15)
Me.ClientSize = New System.Drawing.Size(880, 552)
Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.Button1, Me.SchemaTableList})
Me.Name = "Form1"
Me.Text = "Form1"
Me.ResumeLayout(False)
End Sub
- End Region
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Const SelectQuery As String = "SELECT * FROM Employee"
Dim conn As SqlConnection = New SqlConnection _
("Server=(local)\SQLEXPRESS;Initial Catalog=MyDatabase;Integrated Security=SSPI")
" Retrieving schema for columns from a single table
Dim cmd As SqlCommand = New SqlCommand(SelectQuery, conn)
" Retrieve schema only
conn.Open()
Dim reader As SqlDataReader = cmd.ExecuteReader(CommandBehavior.SchemaOnly)
" Get references to schema information
Dim SchemaTable As DataTable = reader.GetSchemaTable()
" Close and release the connection before processing results
reader.Close()
conn.Close()
" Display schema table column headers
Dim col As DataColumn
SchemaTableList.View = View.Details
For Each col In SchemaTable.Columns
SchemaTableList.Columns.Add(col.ColumnName, 100, HorizontalAlignment.Left)
Next
" Display schema
Dim row As DataRow
Dim ColCount As Integer = SchemaTable.Columns.Count
For Each row In SchemaTable.Rows
Dim OrderDetails(ColCount) As String
Dim ColIdx As Integer
For ColIdx = 0 To ColCount - 1
OrderDetails(ColIdx) = Convert.ToString(row(ColIdx))
Next
Dim NewItem As ListViewItem = New ListViewItem(OrderDetails)
SchemaTableList.Items.Add(NewItem)
Next
End Sub
End Class
</source>
