Calling a PaintEventArgs in C# web form

TowerMan

Hi,

I am trying something simple, just trying to draw a pie chart on a web form. I wish to call a PaintEventArgs when a button click event is called. Below is my code

protected void Button1_Click(object sender, EventArgs e)
    {
        //Creating an instance of DrawPieFloat
        this.Paint += new PaintEventHandler(DrawPieFloat);
    }

    public void DrawPieFloat( PaintEventArgs e)
    {
         // Create pen.
        Pen blackPen = new Pen(Color.Black, 3);
        // Create location and size of ellipse.
        float x = 0.0F;
        float y = 0.0F;
        float width = 200.0F;
        float height = 100.0F;
        // Create start and sweep angles.
        float startAngle = 0.0F;
        float sweepAngle = 45.0F;
        // Draw pie to screen.
        g.Graphics.DrawPie(blackPen, x, y, width, height, startAngle, sweepAngle);
    }

The error I get is "The type or namespace name "PaintEventArgs" could not be found. I think what I am doing wrong is calling "this.Paint" which is a win form rather than a web form call.

Any help would be great?

sailorfoley

Hey,

your right. The paint event does not exist for Web Pages, it exists only in Windows Forms. To further answer your question - the type PaintEventArgs exists only in the System.Windows.Forms namespace.

Web pages are HTML. What you want to do is when you click a button the chart re-draws? I would make a control that displays the chart on screen and when the button is clicked, change the chart in whatever way you want. The browser will then display the chart on screen with changes.

Hope this helps