Discussion :

[deathsurfer]

Bonjour à tous! Voici mon code , mais j'ai une erreur qui est

Une valeur de type 'ComboIcone' ne peut pas être convertie en 'System.Web.UI.Control'.

Voici la classe:

Code :

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Imports Microsoft.VisualBasic
Public Class ComboIcone
    Inherits System.Windows.Forms.ComboBox
    Public ListaImg1 As New Windows.Forms.ImageList
    'It is the ImageList associated to the Combo
 
    Public Sub New()
        DrawMode = Windows.Forms.DrawMode.OwnerDrawFixed
        'Set the DrawMode to OwnerDraw
    End Sub
 
    Protected Overrides Sub OnDrawItem(ByVal e As System.Windows.Forms.DrawItemEventArgs)
        e.DrawBackground()
        e.DrawFocusRectangle()
        Dim item As New ComboBoxIconItem
        Dim imageSize As New Drawing.Size
        imageSize = ListaImg1.ImageSize
        Dim bounds As New Drawing.Rectangle
        bounds = e.Bounds
        Try
            item = Me.Items(e.Index)
            If (item.ImageIndex <> -1) Then
                Me.ListaImg1.Draw(e.Graphics, bounds.Left, _
                    bounds.Top, item.ImageIndex)
                e.Graphics.DrawString(item.Text, e.Font, _
                    New Drawing.SolidBrush(e.ForeColor), bounds.Left + _
                    imageSize.Width, bounds.Top)
            Else
                e.Graphics.DrawString(item.Text, e.Font, _
                    New Drawing.SolidBrush(e.ForeColor), bounds.Left, _
                    bounds.Top)
            End If
        Catch ex As Exception
            If (e.Index <> -1) Then
                e.Graphics.DrawString(Items(e.Index).ToString(), e.Font, _
                    New Drawing.SolidBrush(e.ForeColor), bounds.Left, bounds.Top)
            Else
                e.Graphics.DrawString(Text, e.Font, _
                    New Drawing.SolidBrush(e.ForeColor), bounds.Left, bounds.Top)
            End If
        End Try
        MyBase.OnDrawItem(e)
    End Sub
 
End Class
Public Class ComboBoxIconItem
    Private _text As String
 
    Property Text() As String
        Get
            Return _text
        End Get
        Set(ByVal Value As String)
            _text = Value
        End Set
    End Property
 
    Private _imageIndex As Integer
 
    Property ImageIndex() As Integer
        Get
            Return _imageIndex
        End Get
 
        Set(ByVal Value As Integer)
            _imageIndex = Value
        End Set
    End Property
 
    Public Sub New()
        _text = ""
    End Sub
 
    Public Sub New(ByVal text As String)
        _text = text
    End Sub
 
    Public Sub New(ByVal text As String, ByVal imageIndex As Integer)
        _text = text
        _imageIndex = imageIndex
    End Sub
 
 
    Public Overrides Function ToString() As String
        Return _text
    End Function
End Class

Et voici le code de la page:

Code :

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Dim MyCombo As New ComboIcone 'Create the Combo
        Dim ImageList1 As Windows.Forms.ImageList
        Dim image1 As Drawing.Bitmap
        image1 = New Drawing.Bitmap("~\Images\1.bmp", True)
        ImageList1.Images.Add(image1)
        MyCombo.ListaImg1 = ImageList1
        'Associates the Combo to an ImageList
        MyCombo.Items.Add(New ComboBoxIconItem("", 0))
        'Add new Item text=Bart image=0 
        Me.Controls.Add(MyCombo) 'add the combobox to the form
        'Place the combobox in a nice place
        MyCombo.Top = 30
        MyCombo.Left = 50

L'erreur se situe au niveau de cette ligne:

Code :

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        Me.Controls.Add(MyCombo) 'add the combobox to the form

Comment faire ? Merci à tous!

[SaumonAgile]

Ben c'est normal, tu hérites de System.Windows.Forms.ComboBox...

[deathsurfer]

Ah ouai j'avais pas fait gaffe! Comment je peux faire alors?

[SaumonAgile]

Tu hérites de System.Web.UI.ComboBox à la place.

[deathsurfer]

Ca n'existe pas...

[SaumonAgile]

Rho tu n'es pas dispensé de chercher non plus , il s'agit de DropDownList...