Steps: Instantiate a new control Set some properties of the control Name property Location property Text property Add it to the Controls collection of the form or the container (GroupBox,Panel, FlowLayoutPanel, ) | Week 2 Windows Controls (Chapter 1 - 4) Contents Adding control and event at run-time ( ) Sharing event handler () ImageList component () ListView control () Slide Adding control at run-time ( ) Steps: Instantiate a new control Set some properties of the control Name property Location property Text property Add it to the Controls collection of the form or the container (GroupBox,Panel, FlowLayoutPanel, ) Slide Adding control at run-time: Example Button aButton = new Button(); = new Point(20,20); = "Test Button"; (aButton); // add button to form // (aButton); // add button to panel Exercise 3 – Module 3 Slide Module 2, bài 3: TextBox txt = new TextBox(); = ""; = "txt1"; = new Point(20,20); = - 40; (txt); Creating event handlers at run-time () Steps: Create a method whose signature matches the signature for the event Use the += operator to associate the method with the event Example: private void EventMethod( object sender, EventArgs e ) { ("aaaa"); } += new EventHandler(EventMethod); Remove an event handler by using the =- operator Slide Exercise 3 – Module 3 Exercise 3 – Module 3 private void textBox1_TextChanged(object sender, EventArgs e) { TextBox t=(TextBox)sender; } private void textBox1_DoubleClick(object sender, EventArgs e) { } += new (); += new (); Sharing event handler () Sharing event handler for case: Multi-controls use the same event handler At design-time: See near figure Exercise 2,6 – Module 3 At run-time: Write code: use += Exercise 5 – Module 3 Slide Exercise 2 – Module 3: private void radioButton_CheckedChanged(object sender, EventArgs e) { . | Week 2 Windows Controls (Chapter 1 - 4) Contents Adding control and event at run-time ( ) Sharing event handler () ImageList component () ListView control () Slide Adding control at run-time ( ) Steps: Instantiate a new control Set some properties of the control Name property Location property Text property Add it to the Controls collection of the form or the container (GroupBox,Panel, FlowLayoutPanel, ) Slide Adding control at run-time: Example Button aButton = new Button(); = new Point(20,20); = "Test Button"; (aButton); // add button to form // (aButton); // add button to panel Exercise 3 – Module 3 Slide Module 2, bài 3: TextBox txt = new TextBox(); = ""; = "txt1"; = new Point(20,20); = - 40; (txt); Creating event handlers at run-time () Steps: Create a method
