title: c# draw a pie chart to a tab
body: <p>Pretty simple Question, unfortunatly never used draw controls etc in C# so im not sure how to look at this.
  Ok, im drawing a piechart from a bunch of textboxs for input and running the draw on a button event.
  i need to draw the chart on one of my tabs instead of the from background.  how do i set it?
  heres my code:</p>
  
  <pre><code>      private void tempButton_Click(object sender, EventArgs e)
      {
          Rectangle tabArea;
          RectangleF tabTextArea;
  
          Bitmap B = new Bitmap(500, 500);
  
          tabArea = tabControl1.GetTabRect(0);
  
          tabTextArea = (RectangleF)tabControl1.GetTabRect(0);
  
          using (Graphics g = Graphics.FromImage(B))
          {
              int i1 = int.Parse(textBox1.Text);
              int i2 = int.Parse(textBox2.Text);
              int i3 = int.Parse(textBox3.Text);
              int i4 = int.Parse(textBox4.Text);
  
              float total = i1 + i2 + i3 + i4;
              float deg1 = (i1 / total) * 360;
              float deg2 = (i2 / total) * 360;
              float deg3 = (i3 / total) * 360;
              float deg4 = (i4 / total) * 360;
  
              Font font = new Font("Arial", 10.0f);
              SolidBrush brush = new SolidBrush(Color.Red);
              Pen p = new Pen(Color.Black, 2);
              p.Width = 0.5f;
  
              tabArea = new Rectangle(textBox1.Location.X + textBox1.Size.Width + 250, 150, 500, 500);
  
              Brush b1 = new SolidBrush(Color.Gold);
              Brush b2 = new SolidBrush(Color.Silver);
              Brush b3 = new SolidBrush(Color.DarkOrange);
              Brush b4 = new SolidBrush(Color.Black);
  
              g.DrawRectangle(p, tabArea);
  
              g.DrawPie(p, tabTextArea, 0, deg1);
              g.FillPie(b1, tabArea, 0, deg1);
              g.DrawPie(p, tabTextArea, deg1, deg2);
              g.FillPie(b2, tabArea, deg1, deg2);
              g.DrawPie(p, tabTextArea, deg2 + deg1, deg3);
              g.FillPie(b3, tabArea, deg2 + deg1, deg3);
              g.DrawPie(p, tabTextArea, deg3 + deg2 + deg1, deg4);
              g.FillPie(b4, tabArea, deg3 + deg2 + deg1, deg4);
  
              //set picturebox3 as data source??
              pictureBox3.Image = B;
  
          }
      }
  </code></pre>
  
  <p>As you can see when i click the test button it draws the chart but behind my tab area, i need it to draw onto one of my tabs(i got a feeling this is super easy 1line solution, but google is not my friend atm ).
  Many thanks in advance!</p>