VB.Net/Database ADO.net/Data bind to ListBox — различия между версиями

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Текущая версия на 12:44, 26 мая 2010

Bind data to ListBox

 
Imports System
Imports System.Data
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 ListBox1 As System.Windows.Forms.ListBox
   Friend WithEvents TextBox1 As System.Windows.Forms.TextBox
   Friend WithEvents TextBox2 As System.Windows.Forms.TextBox
   Friend WithEvents DataSet1 As System.Data.DataSet
   <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
      Me.ListBox1 = New System.Windows.Forms.ListBox
      Me.TextBox1 = New System.Windows.Forms.TextBox
      Me.TextBox2 = New System.Windows.Forms.TextBox
      Me.DataSet1 = New System.Data.DataSet
      CType(Me.DataSet1, System.ruponentModel.ISupportInitialize).BeginInit()
      Me.SuspendLayout()
      "
      "ListBox1
      "
      Me.ListBox1.Location = New System.Drawing.Point(8, 8)
      Me.ListBox1.Name = "ListBox1"
      Me.ListBox1.Size = New System.Drawing.Size(272, 95)
      Me.ListBox1.TabIndex = 0
      "
      "TextBox1
      "
      Me.TextBox1.Location = New System.Drawing.Point(8, 112)
      Me.TextBox1.Name = "TextBox1"
      Me.TextBox1.Size = New System.Drawing.Size(128, 20)
      Me.TextBox1.TabIndex = 1
      Me.TextBox1.Text = "TextBox1"
      "
      "TextBox2
      "
      Me.TextBox2.Location = New System.Drawing.Point(152, 112)
      Me.TextBox2.Name = "TextBox2"
      Me.TextBox2.Size = New System.Drawing.Size(128, 20)
      Me.TextBox2.TabIndex = 2
      Me.TextBox2.Text = "TextBox2"
      "
      "DataSet1
      "
      Me.DataSet1.DataSetName = "NewDataSet"
      Me.DataSet1.Locale = New System.Globalization.CultureInfo("en-GB")
      "
      "Form1
      "
      Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
      Me.ClientSize = New System.Drawing.Size(292, 149)
      Me.Controls.Add(Me.TextBox2)
      Me.Controls.Add(Me.TextBox1)
      Me.Controls.Add(Me.ListBox1)
      Me.Name = "Form1"
      Me.Text = "Form1"
      CType(Me.DataSet1, System.ruponentModel.ISupportInitialize).EndInit()
      Me.ResumeLayout(False)
   End Sub
#End Region
   Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
      "Create Connection object
      Dim thisConnection As New SqlConnection _
         ("server=(local)\SQLEXPRESS;" & _
          "integrated security=sspi;" & _
          "database=MyDatabase")
      " Sql Query 
      Dim sql As String = _
         "SELECT FirstName, LastName FROM Employee"
      " Create Data Adapter
      Dim da As New SqlDataAdapter(sql, thisConnection)
      " Fill Dataset and Create DataTable
      da.Fill(DataSet1, "Employee")
      Dim dt As DataTable = DataSet1.Tables("Employee")
      ListBox1.DataSource = dt
      ListBox1.DisplayMember = "FirstName"
      " Bind to firstname column of the employees table
      TextBox1.DataBindings.Add("text", dt, "FirstName")
      " Bind to lastname column of the employees table
      TextBox2.DataBindings.Add("text", dt, "LastName")
   End Sub
End Class


Multi-Control Data Binding

  
Imports System.Data.SqlClient
Imports System.Windows.Forms
<Global.Microsoft.VisualBasic.rupilerServices.DesignerGenerated()> _
Partial Class BoundForm
    Inherits System.Windows.Forms.Form
    <System.Diagnostics.DebuggerStepThrough()> _
    Private Sub InitializeComponent()
        Me.gridDB = New System.Windows.Forms.DataGridView
        Me.Label3 = New System.Windows.Forms.Label
        Me.Label2 = New System.Windows.Forms.Label
        Me.Label1 = New System.Windows.Forms.Label
        Me.dtBirth = New System.Windows.Forms.DateTimePicker
        Me.lstID = New System.Windows.Forms.ListBox
        Me.txtLastName = New System.Windows.Forms.TextBox
        Me.txtFirstName = New System.Windows.Forms.TextBox
        CType(Me.gridDB, System.ruponentModel.ISupportInitialize).BeginInit()
        Me.SuspendLayout()
        "
        Me.gridDB.Anchor = CType((((System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Bottom) _
                    Or System.Windows.Forms.AnchorStyles.Left) _
                    Or System.Windows.Forms.AnchorStyles.Right), System.Windows.Forms.AnchorStyles)
        Me.gridDB.ColumnHeadersHeightSizeMode = System.Windows.Forms.DataGridViewColumnHeadersHeightSizeMode.AutoSize
        Me.gridDB.Location = New System.Drawing.Point(12, 126)
        Me.gridDB.Name = "gridDB"
        Me.gridDB.Size = New System.Drawing.Size(348, 132)
        Me.gridDB.TabIndex = 17
        "
        "Label3
        "
        Me.Label3.Location = New System.Drawing.Point(116, 77)
        Me.Label3.Name = "Label3"
        Me.Label3.Size = New System.Drawing.Size(68, 16)
        Me.Label3.TabIndex = 16
        Me.Label3.Text = "Birth Date:"
        "
        "Label2
        "
        Me.Label2.Location = New System.Drawing.Point(116, 45)
        Me.Label2.Name = "Label2"
        Me.Label2.Size = New System.Drawing.Size(68, 16)
        Me.Label2.TabIndex = 15
        Me.Label2.Text = "Last Name:"
        "
        "Label1
        "
        Me.Label1.Location = New System.Drawing.Point(116, 17)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(68, 16)
        Me.Label1.TabIndex = 14
        Me.Label1.Text = "First Name:"
        "
        "dtBirth
        "
        Me.dtBirth.Format = System.Windows.Forms.DateTimePickerFormat.[Short]
        Me.dtBirth.Location = New System.Drawing.Point(192, 73)
        Me.dtBirth.Name = "dtBirth"
        Me.dtBirth.Size = New System.Drawing.Size(132, 21)
        Me.dtBirth.TabIndex = 13
        "
        "lstID
        "
        Me.lstID.Location = New System.Drawing.Point(12, 9)
        Me.lstID.Name = "lstID"
        Me.lstID.Size = New System.Drawing.Size(68, 108)
        Me.lstID.TabIndex = 12
        "
        "txtLastName
        "
        Me.txtLastName.Location = New System.Drawing.Point(192, 41)
        Me.txtLastName.Name = "txtLastName"
        Me.txtLastName.Size = New System.Drawing.Size(132, 21)
        Me.txtLastName.TabIndex = 11
        "
        "txtFirstName
        "
        Me.txtFirstName.Location = New System.Drawing.Point(192, 13)
        Me.txtFirstName.Name = "txtFirstName"
        Me.txtFirstName.Size = New System.Drawing.Size(132, 21)
        Me.txtFirstName.TabIndex = 10
        "
        "BoundForm
        "
        Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
        Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
        Me.ClientSize = New System.Drawing.Size(372, 266)
        Me.Controls.Add(Me.gridDB)
        Me.Controls.Add(Me.Label3)
        Me.Controls.Add(Me.Label2)
        Me.Controls.Add(Me.Label1)
        Me.Controls.Add(Me.dtBirth)
        Me.Controls.Add(Me.lstID)
        Me.Controls.Add(Me.txtLastName)
        Me.Controls.Add(Me.txtFirstName)
        Me.Font = New System.Drawing.Font("Tahoma", 8.25!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.Name = "BoundForm"
        Me.Text = "BoundForm"
        CType(Me.gridDB, System.ruponentModel.ISupportInitialize).EndInit()
        Me.ResumeLayout(False)
        Me.PerformLayout()
    End Sub
    Friend WithEvents gridDB As System.Windows.Forms.DataGridView
    Friend WithEvents Label3 As System.Windows.Forms.Label
    Friend WithEvents Label2 As System.Windows.Forms.Label
    Friend WithEvents Label1 As System.Windows.Forms.Label
    Friend WithEvents dtBirth As System.Windows.Forms.DateTimePicker
    Friend WithEvents lstID As System.Windows.Forms.ListBox
    Friend WithEvents txtLastName As System.Windows.Forms.TextBox
    Friend WithEvents txtFirstName As System.Windows.Forms.TextBox
    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Dim Connect As String = "Data Source=localhost;Integrated Security=True;Initial Catalog=Northwind;"
        Dim con As New SqlConnection(Connect)
        Dim SQL As String = "SELECT * FROM Employees"
        Dim cmd As New SqlCommand(SQL, con)
        Dim adapter As New SqlDataAdapter(cmd)
        Dim dsNorthwind As New DataSet()
        con.Open()
        adapter.Fill(dsNorthwind, "Employees")
        con.Close()
        gridDB.DataSource = dsNorthwind.Tables("Employees")
        txtFirstName.DataBindings.Add("Text", dsNorthwind.Tables("Employees"), "FirstName")
        txtLastName.DataBindings.Add("Text", dsNorthwind.Tables("Employees"), "LastName")
        lstID.DataSource = dsNorthwind.Tables("Employees")
        lstID.DisplayMember = "EmployeeID"
        dtBirth.DataBindings.Add("Value", dsNorthwind.Tables("Employees"), "BirthDate")
    End Sub
End Class