Stephens' C# Programming with Visual Studio® 2010 24-Hour Trainer

Exercises



447

{

// Find the next point’s coordinates.

oat x1 = marginX + scaleX * i;

oat y1 = graphPictureBox.ClientSize.Height –

marginY - scaleY * values[i];

// Draw a line from the previous point to this one.

graphics.DrawLine(Pens.Black, x0, y0, x1, y1);

// Draw this point’s value in text.

if (values[i] >= 50)

{

graphics.DrawString(values[i].ToString(),

this.Font, Brushes.Black, x1, y1 - 12);

}

else

{

graphics.DrawString(values[i].ToString(),

this.Font, Brushes.Red, x1, y1);

}

// Update (x0, y0).

x0 = x1;

y0 = y1;

}

}

Please select Lesson 39 on the DVD to view the video that accompanies this lesson.

EXERCISES

1. Build a program that uses a Paint event handler to draw a picture similar to the one shown

in Figure 39-6. (Feel free to embellish with ears, a hat, a scarf, or anything else you like.)

2. Build a program that uses a Paint event handler to draw a bar chart similar to the one

shown in Figure 39-7. (Hint: Use the program you built for the Try It as a starting point.)

FIGURE 396

FIGURE 397

596906c39.indd 447 4/7/10 12:35:15 PM

448



LESSON 39 Drawing with gDi+

You can download the solutions to these exercises from the book’s web page at

www.wrox.com or www.CSharpHelper.com/24hour.html. You can find those

solutions in the Lesson39 folder.

3. Build a Scribble program ...