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Public Class Form1
Private ListPersons As List(Of Person)
Private p As Person
Public Sub New()
' Cet appel est requis par le Concepteur Windows Form.
InitializeComponent()
' Ajoutez une initialisation quelconque après l'appel InitializeComponent().
End Sub
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Me.ListPersons = New List(Of Person)
Dim rnd As Random = New Random
For i As Integer = 0 To 9
Me.p = New Person("Paul" & (i + 1).ToString, "Michel" & (i + 1).ToString, Date.Now, rnd.NextDouble * 1000)
Me.ListPersons.Add(p)
Next
Me.ListBox1.DataSource = Me.ListPersons
End Sub
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
If Me.ListPersons IsNot Nothing Then
For Each p As Person In Me.ListPersons
Me.ListBox2.Items.Add(p.ToString)
Next
End If
End Sub
'join((from o as object in lof select o.tostring),";")
Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
'Insere un separateur de ligne VBCRLF
'Split le tout ce qui donne un Tableau de Ligne type string
'Convertit le Tableau en List(of Ligne) & l'envoie vers le magasin datasource
If Me.ListPersons IsNot Nothing Then
Dim s As String = Join((From o As Object In Me.ListPersons Select p = o.ToString).ToArray, "; " & vbCrLf)
Me.ListBox3.DataSource = s.Split(vbCrLf).ToList
End If
End Sub
End Class
Class Person
Public Sub New(ByVal fn As String, ByVal ln As String, ByVal bd As Date, ByVal ac As Decimal)
m_FName = fn
m_LName = ln
m_Account = ac
m_BirthDate = bd
End Sub
' Expose a custom type from a bound property
Private m_FName As String
Public Property FName() As String
Get
Return m_FName
End Get
Set(ByVal value As String)
m_FName = value
End Set
End Property
Private m_LName As String
Public Property LName() As String
Get
Return m_LName
End Get
Set(ByVal value As String)
m_LName = value
End Set
End Property
Private m_BirthDate As Date
Public Property BirthDate() As Date
Get
Return m_BirthDate
End Get
Set(ByVal value As Date)
m_BirthDate = value
End Set
End Property
Private m_Account As Decimal
Public Property Account() As Decimal
Get
Return m_Account
End Get
Set(ByVal value As Decimal)
m_Account = value
End Set
End Property
'note que les espaces inseres avant et apres le pt-virgule
'dans la chaine de formatage compte
Public Overrides Function ToString() As String
Return String.Format("Nom :{0} ; Prenom : {1}; Compte : {2} ; DateNaissance : {3}", Me.LName, _
Me.LName, Me.Account, Me.BirthDate.ToShortDateString)
End Function
End Class |
transformer List(Of Obj) en string
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