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This document discusses using GDI (Graphical Design Interface) in C# to add graphics capabilities. It describes three main GDI methods - DrawString() to display text, DrawImage() to display images, and DrawEllipse() to draw ellipses. Examples are provided for each method using a Timer control and Graphics object to incrementally draw the graphics on a form at runtime. More C# and Angular JS tutorials can be found on the provided blog website.
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- 1. C# Tutorial Part 32:GDI www.siri-kt.blogspot.com
- 2. • GDI(graphical designinginterface): • The c#.net windows application by default supports only GUI features using GUi feature we can add all controls on the form container. using GDi we can give 2D & 3D graphics‘ Microsoft assigned these features in the system.drawing.drawing2d; • Graphics(class): • using this class we can convert windows form mode into GDI mode.this class supports 3 predefined methods • 1.Drawstring() • 2.DrawImage() • 3.DrawEllipse() • 1.Drawstring(): • using this method we can display string value on the form container. this method takes 5 parameters • 1.string • 2.font • 3.brush • 4.form x-location • 5.form y-location
- 3. • 1.take theform • 2.add timer control(windows.forms.timer) • goto-timer-properties-enabled=true interval=10 • source code: • using System.Drawing.Drawing2D; • string s = "INDIA"; • Font f = new Font("Ariel", 100); • Graphics g; • int i; • private void timer1_Tick(object sender, EventArgs e) • { LinearGradientBrush b = new LinearGradientBrush(new PointF(100, 100), new PointF(200, i), Color.Red, Color.Green); • g = this.CreateGraphics(); • g.DrawString(s, f, b, 100, 100); • i++; • if (i == 100) • { i = 0; } }
- 4. • 2.DrawImage(): • usingthis method we can display image on the form container this method takes 2 parameters • 1.image(image.fromfile("path")) • 2.rectangle class • Rectangle class: • using this class we can display rectangle on this form conatiner. • this class takes 4 constructor parameters • 1.form x location • 2.form y location • 3.Rectangle width • 4.Rectangle height • Example on drawimage(): • 1.take the form • 2.add timer control
- 5. • goto-timer-properties-enabled=true interval=10 •goto-solution explorer-add existing item-*.gif images • source code: • using System.Drawing.Drawing2D; • Graphics g; • int i; • private void timer1_Tick(object sender, EventArgs e) • { g = this.CreateGraphics(); • Rectangle r = new Rectangle(i, i, i, i); g.DrawImage(Image.FromFile("E:7pmonlineDrawInageExampleDrawInageExampl esmallSuccess.gif"),r); • i++; • if (i == 200) • { i = 0; • } }
- 6. • 3.DrawEllipse(): • usingthis method we can display ellipse on the from container this method takes 5-parameters • 1.pen structure • 2.form x-location • 3.form y-location • 4.ellipse height • 5.ellipse width • example on drawellipse(): • 1.take the form • 2.add timer control
- 7. • goto-timer-properties-enabled=false,interval=10; • form1-properties-windowstate=maximized •form1-events-mousedown(doubleclick) • form1-events-mouseup(doubleclick) • source code: • using System.Drawing.Drawing2D; • int x, y; • Graphics g; • int i; • private void Form1_MouseDown(object sender, MouseEventArgs e) • { x = e.X; • y = e.Y; • timer1.Enabled = true; }
- 8. • private voidForm1_MouseUp(object sender, MouseEventArgs e) • { i = 0; • timer1.Enabled = false; } • private void timer1_Tick(object sender, EventArgs e) • { g = this.CreateGraphics(); • g.DrawEllipse(new Pen(new SolidBrush(Color.Green), 1), x, y, i, i); • i++; }
- 9. For more visitour website www.siri-kt.blogspot.com Thanks for Watching More Angular JS TutorialsMore C sharp (c#) tutorials