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I want to display an given string in a specific angle. I tried to to do this with the System.Drawing.Font class. Here is my code:

Font boldFont = new Font(FontFamily.GenericSansSerif, 12, FontStyle.Bold, GraphicsUnit.Pixel, 1, true);
graphics.DrawString("test", boldFont, textBrush, 0, 0);

Can anyone help me?

eagle999
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3 Answers3

21
String theString = "45 Degree Rotated Text";
SizeF sz = e.Graphics.VisibleClipBounds.Size;
//Offset the coordinate system so that point (0, 0) is at the
center of the desired area.
e.Graphics.TranslateTransform(sz.Width / 2, sz.Height / 2);
//Rotate the Graphics object.
e.Graphics.RotateTransform(45);
sz = e.Graphics.MeasureString(theString, this.Font);
//Offset the Drawstring method so that the center of the string matches the center.
e.Graphics.DrawString(theString, this.Font, Brushes.Black, -(sz.Width/2), -(sz.Height/2));
//Reset the graphics object Transformations.
e.Graphics.ResetTransform();

Taken from here.

Darin Dimitrov
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10

You can use the RotateTransform method (see MSDN) to specify rotation for all drawing on Graphics (including text drawn using DrawString). The angle is in degrees:

graphics.RotateTransform(angle)

If you want to do just a single rotated operation, then you can reset the transform to the original state by calling RotateTransform again with negative angle (alternatively, you can use ResetTransform, but that will clear all transformations that you applied which may not be what you want):

graphics.RotateTransform(-angle)
Tomas Petricek
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9

If you want a method to draw a rotated string at the strings center position, then try the following method:

public void drawRotatedText(Bitmap bmp, int x, int y, float angle, string text, Font font, Brush brush)
{
  Graphics g = Graphics.FromImage(bmp);
  g.TranslateTransform(x, y); // Set rotation point
  g.RotateTransform(angle); // Rotate text
  g.TranslateTransform(-x, -y); // Reset translate transform
  SizeF size = g.MeasureString(text, font); // Get size of rotated text (bounding box)
  g.DrawString(text, font, brush, new PointF(x - size.Width / 2.0f, y - size.Height / 2.0f)); // Draw string centered in x, y
  g.ResetTransform(); // Only needed if you reuse the Graphics object for multiple calls to DrawString
  g.Dispose();
}

Best regards Hans Milling...

nivs1978
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