Drawing to the screen

Question

Hello I Want to draw a geometric object to the screen and then fill it. I can draw it but don't come any further. I have a button1_Click-Event: private void button1_Click( object sender EventArgs e) { this .pictureBox1.Paint += new System.Windows.Forms.PaintEventHandler( this .FillEllipseRectangle); } And then the FillEllipseRectangle-Event: private void FillEllipseRectangle( object sender PaintEventArgs e) { MessageBox.Show( well done ); ... } I don't recieve the well done-message and nothing else in this method is being compiled. I hope somebody can help me.

Amit Gupta · Answer

As you are passing multiple handler to paint event. In order to change the delegate you have to first remove the previous delegate then reassign the new one

Amit Gupta · Answer

Tge code seems good. What is the error/problem

Amit Gupta · Answer

Try this public partial class Form1 : Form { public Form1() { InitializeComponent(); pictureBox1.Image = new Bitmap(pictureBox1.Width pictureBox1.Height); } private void button1_Click(object sender EventArgs e) { using (var g = Graphics.FromImage(pictureBox1.Image)) { g.DrawEllipse(Pens.Blue 10 10 100 100); pictureBox1.Refresh(); } } }

Dmitrij Solov · Answer

This program just doesn't run fast. I have to minimize and then to maximize it in order to drow the ellipse. Here my partial class without index highliting: public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void button1_Click(object sender EventArgs e) { this.pictureBox1.Paint += new System.Windows.Forms.PaintEventHandler(this.FillEllipseRectangle); } private void FillEllipseRectangle(object sender PaintEventArgs e) { MessageBox.Show(very well done!); Pen itsme = new Pen(Color.Green 3); //Draw the ellipse int x = 5; int y = 5; int width = 200; int height = 100; rect = new Rectangle(x y width height); e.Graphics.DrawEllipse(itsme rect); //Draw the ellipse int x1= 5; int y1 = 5; int width1 = 200; int height1 = 100; rect1 = new Rectangle(x1 y1 width1 height1); SolidBrush redBrush = new SolidBrush(Color.Red); e.Graphics.FillEllipse(redBrush this.rect1); } public System.Drawing.Rectangle rect { get; set; } public System.Drawing.Rectangle rect1 { get; set; } } }

Bikesh Srivastava · Answer

What error exacatly you are getting if message is showing.

Dmitrij Solov · Answer

I have done it this way: But the program doesn't run fast. I have to minimize and then to maximize it in order to drow the ellipse. I want this program to run fast. Hope you can help me. using System; using System.ComponentModel; using System.Drawing; using System.Windows.Forms; //Ellipse Issue namespace WDrawingToTheScreen { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void button1_Click( object sender EventArgs e) { this .pictureBox1.Paint += new System.Windows.Forms.PaintEventHandler( this .FillEllipseRectangle); } private void FillEllipseRectangle( object sender PaintEventArgs e) { MessageBox.Show( very well done! ); Pen itsme = new Pen(Color.Green 3); //Draw the ellipse int x = 5; int y = 5; int width = 200; int height = 100; rect = new Rectangle(x y width height); e.Graphics.DrawEllipse(itsme rect); //Draw the ellipse int x1= 5; int y1 = 5; int width1 = 200; int height1 = 100; rect1 = new Rectangle(x1 y1 width1 height1); SolidBrush redBrush = new SolidBrush(Color.Red); e.Graphics.FillEllipse(redBrush this .rect1); } public System.Drawing.Rectangle rect { get ; set ; } public System.Drawing.Rectangle rect1 { get ; set ; } } }

Dmitrij Solov · Answer

As I mentioned preveously I don't recieve the very well done-message and nothing else in the FillEllipseRectangle method is being compiled.

Dmitrij Solov · Answer

Actually I would like the partial class to be like this: I can draw the ellipse but ellipse doesn't get filled. using System; using System.ComponentModel; using System.Drawing; using System.Windows.Forms; //Ellipse Issue namespace WDrawingToTheScreen { public partial class Form1 : Form { public Form1() { InitializeComponent(); this .pictureBox1.Paint += new System.Windows.Forms.PaintEventHandler( this .DrawEllipseRectangle); } private void button1_Click( object sender EventArgs e) { this .pictureBox1.Paint += new System.Windows.Forms.PaintEventHandler( this .FillEllipseRectangle); } private void DrawEllipseRectangle( object sender PaintEventArgs e) { Pen itsme = new Pen(Color.Green 3); //Draw the ellipse int x = 5; int y = 5; int width = 200; int height = 100; Rectangle rect = new Rectangle(x y width height); e.Graphics.DrawEllipse(itsme rect); } private void FillEllipseRectangle( object sender PaintEventArgs e) { MessageBox.Show( very well done! ); //Draw the ellipse int x = 5; int y = 5; int width = 200; int height = 100; Rectangle rect1 = new Rectangle(x y width height); SolidBrush redBrush = new SolidBrush(Color.Red); e.Graphics.FillEllipse(redBrush this .rect1); } public System.Drawing.Rectangle rect { get ; set ; } public System.Drawing.Rectangle rect1 { get ; set ; } } }