Comment : créer une bitmap au moment de l'exécution
Cet exemple crée et dessine dans un objet Bitmap, puis l'affiche dans un contrôle PictureBox Windows Forms existant.
Exemple
Private pictureBox1 As New PictureBox()
Public Sub CreateBitmapAtRuntime()
pictureBox1.Size = New Size(210, 110)
Me.Controls.Add(pictureBox1)
Dim flag As New Bitmap(200, 100)
Dim flagGraphics As Graphics = Graphics.FromImage(flag)
Dim red As Integer = 0
Dim white As Integer = 11
While white <= 100
flagGraphics.FillRectangle(Brushes.Red, 0, red, 200, 10)
flagGraphics.FillRectangle(Brushes.White, 0, white, 200, 10)
red += 20
white += 20
End While
pictureBox1.Image = flag
End Sub
PictureBox pictureBox1 = new PictureBox();
public void CreateBitmapAtRuntime()
{
pictureBox1.Size = new Size(210, 110);
this.Controls.Add(pictureBox1);
Bitmap flag = new Bitmap(200, 100);
Graphics flagGraphics = Graphics.FromImage(flag);
int red = 0;
int white = 11;
while (white <= 100) {
flagGraphics.FillRectangle(Brushes.Red, 0, red, 200,10);
flagGraphics.FillRectangle(Brushes.White, 0, white, 200, 10);
red += 20;
white += 20;
}
pictureBox1.Image = flag;
}
Compilation du code
Cet exemple nécessite les actions ou les éléments suivants :
- Windows Form qui importe les assemblys System, System.Drawing et System.Windows.Forms.