CODEWITHSUNDEEP
c#bitmapwindows-forms-designer
Mohanad Al Nuaimi
Mohanad Al Nuaimi

Reputation: 49

Clear all Bitmap drawings using push button

I made several drawings using Windows forms application visual studio Bitmap, my goal is to clear all drawings when I press the push button (make the background clear) The Following code is not exactly what my original code but this is how I created each drawing 

Rectangle area;
Bitmap creature;//this only one drawing but I have several
Graphics scG;
Bitmap background;
private void Form1_Load(object sender, EventArgs e)
{
  background = new Bitmap(Width, Height);
  area = new Rectangle(50, 50, 50, 50);
  creature = new Bitmap(@"C:\Users\Desktop\Image.png");
}

public Bitmap Draw()
{
  Graphics scG = Graphics.FromImage(background);
  scG.DrawImage(creature, area);

        return background;
    }
}

private void Button_Click(object sender, EventArgs e)
{
  // I want to clear all the drawings by push this button
}

Upvotes: 0

Views: 237

Answers (3)

Tommy
Tommy

Reputation: 3134

There is no way to remove things drawn on a bitmap.

Why don't just dump the old background bitmap and create a new one?

Upvotes: 1

mohammad
mohammad

Reputation: 375

this is duplicate , see this link : How to delete a drawn circle in c# windows form?

or test these Code : 

Graphics.Clear();

or

Control.Invalidate();

or

this.Invalidate();

Upvotes: 0

user6522773
user6522773

Reputation:

The real way is to use event Paint:

private void Form1_Paint(object sender, PaintEventArgs e)
{
  e.Graphics.DrawImage(creature, area); // draw your image here...
}

To delete, just do nothing in Form1_Paint, and call Refresh();

Upvotes: 0

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