Comment dessiner une image sur le composant PictureBox et l'objet Image

Question

 

Il faut trouver le correct objet Graphics correct.  

Conditions prealables : Ajoutez les composants PictureBox1, Button1 et Button2 sur le formulaire Form1

 

Public Class Form1
    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        PictureBox1.Image = Image.FromFile("D:\VBproject\2.jpg")
    End Sub
 
         'dessiner une image sur le composant PictureBox
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim newImage As Image = Image.FromFile("D:\VBproject\1.jpg")
        Dim g As Graphics = Me.PictureBox1.CreateGraphics
        g.DrawImage(newImage, New Rectangle(10, 10, 200, 200))
    End Sub
    
         'dessiner une image sur PictureBox.Image
    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        Dim newImage As Image = Image.FromFile("D:\VBproject\1.jpg")
        Dim g As Graphics = Graphics.FromImage(PictureBox1.Image)
        g.DrawImage(newImage, New Rectangle(10, 10, 200, 200))
        PictureBox1.Refresh()
    End Sub
End Class

 

 

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Alex Petrescu - MSFT