using System; public class PizzaDelivery { public void GetDeliveryStuff() { Console.WriteLine("Pizza Delivery stuff."); } public PizzaDelivery() {} } public class PizzaFinance { public void GetPizzaFinanceStuff() { Console.WriteLine("Pizza Finance stuff."); } public PizzaFinance() { } } public class PizzaInsurance { public void GetPizzaInsuranceStuff() { Console.WriteLine("Pizza Insurance stuff."); } public PizzaInsurance() {} } public class PizzaOrder { public void GetPizzaOrderStuff() { Console.WriteLine("Pizza Order stuff."); } public PizzaOrder() { } } public class PizzaRegistration { public void GetPizzaRegistrationStuff() { Console.WriteLine("Pizza Registration stuff."); } public PizzaRegistration() {} } public class PizzaCooking { public void GetPizzaServiceStuff() { Console.WriteLine("Pizza Service stuff."); } public PizzaCooking() { } } public class DealerRepresentative { private PizzaDelivery delivery; private PizzaFinance finance; private PizzaInsurance insurance; private PizzaOrder order; private PizzaRegistration registration; private PizzaCooking service; public void GetPizzaUpdate() { this.delivery.GetDeliveryStuff(); this.finance.GetPizzaFinanceStuff(); this.insurance.GetPizzaInsuranceStuff(); this.order.GetPizzaOrderStuff(); this.registration.GetPizzaRegistrationStuff(); this.service.GetPizzaServiceStuff(); } public DealerRepresentative() { delivery = new PizzaDelivery(); finance = new PizzaFinance(); insurance = new PizzaInsurance(); order = new PizzaOrder(); registration = new PizzaRegistration(); service = new PizzaCooking(); } } public class Client { static void Main(string[] args) { DealerRepresentative gopher = new DealerRepresentative(); gopher.GetPizzaUpdate(); } }
Author: coder
Composite Pattern Demo
using System; using System.Text; using System.Collections; public abstract class Unit { protected string name; public abstract void Add(Unit e); public abstract void Remove(Unit e); public abstract void GetChild(int level); public Unit(string name) { this.name = name; } } public class Office : Unit { public override void Add(Unit c) { Console.WriteLine("Can't use 'Add' in Office!"); } public override void Remove(Unit e) { Console.WriteLine("Can't use 'Remove' in Office! "); } public override void GetChild(int level) { Console.WriteLine(new string('*', level) + this.name); } public Office(string name) : base(name) {} } public class Branch : Unit { private ArrayList node = new ArrayList(); public override void Add(Unit e) { node.Add(e); } public override void Remove(Unit e) { node.Remove(e); } public override void GetChild(int level) { Console.WriteLine(new String('#', level) + this.name); foreach (Unit e in this.node) e.GetChild(level + 1); } public Branch(string name) : base(name) {} } public class Client { static void Main(string[] args) { Branch root = new Branch("US (Root)"); Office ny = new Office("A (Unit)"); Office ca = new Office("B (Unit)"); root.Add(ny); root.Add(ca); Branch rootHawaii = new Branch("Canada Branch (Branch)"); root.Add(rootHawaii); Branch branchUK = new Branch("UK Branch (Branch)"); Office ldnc = new Office("C Office (Unit)"); Office ldnw = new Office("D Office (Unit)"); branchUK.Add(ldnc); branchUK.Add(ldnw); root.Add(branchUK); Office dummy = new Office("D Office"); ldnc.Add(dummy); root.GetChild(0); root.Remove(rootHawaii); branchUK.Remove(ldnc); Console.WriteLine("Remove Hawaii branch and London City office"); root.GetChild(0); } }
Chain of Responsibility Pattern
using System; public abstract class Chain { protected Chain theNextInChain; public abstract void DealWithRequirement(string requirement); public void NextInChain(Chain next) { this.theNextInChain = next; } } public class Employee : Chain { public override void DealWithRequirement(string requirement) { switch (requirement) { case "Job": Console.WriteLine("{0} Staff", this); break; default: if (theNextInChain != null) theNextInChain.DealWithRequirement(requirement); break; } } } public class Manager : Chain { public override void DealWithRequirement(string requirement) { switch (requirement) { case "Manager": Console.WriteLine("{0} requirement.", this); break; default: if (theNextInChain != null) theNextInChain.DealWithRequirement(requirement); break; } } } public class Senior : Chain { public override void DealWithRequirement(string requirement) { switch (requirement) { default: Console.WriteLine("{0} has managed the " + requirement + " requirement.", this); break; } } public Senior() { ;} } class Client { static void Main(string[] args) { Chain staff = new Employee(); Chain manager = new Manager(); Chain seniorManager = new Senior(); staff.NextInChain(manager); manager.NextInChain(seniorManager); staff.DealWithRequirement("Corporates"); staff.DealWithRequirement("Job"); staff.DealWithRequirement("Manager"); staff.DealWithRequirement("Agency"); } }
Adapter Pattern Demo
using System; public sealed class ForeignExchange { public string UStoUK() { return "USD to GBP is..."; } public string UStoCAN() { return "USD to CND is..."; } public ForeignExchange() { ;} } public class AdapterWrapper { private Adapter adapt; public string AdapterWrapper_USD_GBP() { return this.adapt.USD_GBP(); } public string AdapterWrapper_USD_CND() { return this.adapt.USD_CND(); } public string AdapterWrapper_USD_AUD() { return this.adapt.USD_AUD(); } public AdapterWrapper() { adapt = new Adapter(); } } public class Adapter { private ForeignExchange sourceCode; public string USD_GBP() { return "Conversion " + this.sourceCode.UStoUK(); } public string USD_CND() { return "Conversion " + this.sourceCode.UStoCAN(); } public string USD_AUD() { return "Conversion USD to AUD is..."; } public string USD_JPY() { return "Conversion USD to JNY is..."; } public Adapter() { sourceCode = new ForeignExchange(); } } public class Client { static void Main(string[] args) { AdapterWrapper afx = new AdapterWrapper(); Console.WriteLine(afx.AdapterWrapper_USD_GBP()); Console.WriteLine(afx.AdapterWrapper_USD_CND()); Console.WriteLine(afx.AdapterWrapper_USD_AUD()); } }
Event Tracker
/* User Interfaces in C#: Windows Forms and Custom Controls by Matthew MacDonald Publisher: Apress ISBN: 1590590457 */ using System; using System.Drawing; using System.Collections; using System.ComponentModel; using System.Windows.Forms; using System.Data; namespace EventTracker { /// <summary> /// Summary description for EventTracker. /// </summary> public class EventTracker : System.Windows.Forms.Form { internal System.Windows.Forms.GroupBox GroupBox1; internal System.Windows.Forms.Label Label4; internal System.Windows.Forms.Label Label1; internal System.Windows.Forms.PictureBox pic; internal System.Windows.Forms.TextBox txt; internal System.Windows.Forms.Button cmd; internal System.Windows.Forms.Label Label2; internal System.Windows.Forms.Label Label3; internal System.Windows.Forms.ListBox lstLog; /// <summary> /// Required designer variable. /// </summary> private System.ComponentModel.Container components = null; public EventTracker() { // // Required for Windows Form Designer support // InitializeComponent(); // // TODO: Add any constructor code after InitializeComponent call // } /// <summary> /// Clean up any resources being used. /// </summary> protected override void Dispose( bool disposing ) { if( disposing ) { if (components != null) { components.Dispose(); } } base.Dispose( disposing ); } #region Windows Form Designer generated code /// <summary> /// Required method for Designer support - do not modify /// the contents of this method with the code editor. /// </summary> private void InitializeComponent() { this.GroupBox1 = new System.Windows.Forms.GroupBox(); this.Label4 = new System.Windows.Forms.Label(); this.Label1 = new System.Windows.Forms.Label(); this.pic = new System.Windows.Forms.PictureBox(); this.txt = new System.Windows.Forms.TextBox(); this.cmd = new System.Windows.Forms.Button(); this.Label2 = new System.Windows.Forms.Label(); this.Label3 = new System.Windows.Forms.Label(); this.lstLog = new System.Windows.Forms.ListBox(); this.GroupBox1.SuspendLayout(); this.SuspendLayout(); // // GroupBox1 // this.GroupBox1.Anchor = ((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Left) | System.Windows.Forms.AnchorStyles.Right); this.GroupBox1.Controls.AddRange(new System.Windows.Forms.Control[] { this.Label4, this.Label1, this.pic, this.txt, this.cmd, this.Label2}); this.GroupBox1.FlatStyle = System.Windows.Forms.FlatStyle.System; this.GroupBox1.Location = new System.Drawing.Point(8, 5); this.GroupBox1.Name = "GroupBox1"; this.GroupBox1.Size = new System.Drawing.Size(384, 148); this.GroupBox1.TabIndex = 9; this.GroupBox1.TabStop = false; // // Label4 // this.Label4.Location = new System.Drawing.Point(92, 108); this.Label4.Name = "Label4"; this.Label4.Size = new System.Drawing.Size(56, 16); this.Label4.TabIndex = 5; this.Label4.Text = "And here:"; // // Label1 // this.Label1.Location = new System.Drawing.Point(6, 24); this.Label1.Name = "Label1"; this.Label1.Size = new System.Drawing.Size(144, 16); this.Label1.TabIndex = 2; this.Label1.Text = "Test keyboard events here:"; // // pic // this.pic.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D; this.pic.Location = new System.Drawing.Point(156, 48); this.pic.Name = "pic"; this.pic.Size = new System.Drawing.Size(192, 48); this.pic.TabIndex = 3; this.pic.TabStop = false; this.pic.Click += new System.EventHandler(this.pic_Click); this.pic.MouseEnter += new System.EventHandler(this.pic_MouseEnter); this.pic.MouseHover += new System.EventHandler(this.pic_MouseHover); this.pic.MouseUp += new System.Windows.Forms.MouseEventHandler(this.pic_MouseUp); this.pic.DoubleClick += new System.EventHandler(this.pic_DoubleClick); this.pic.MouseLeave += new System.EventHandler(this.pic_MouseLeave); this.pic.MouseDown += new System.Windows.Forms.MouseEventHandler(this.pic_MouseDown); // // txt // this.txt.Location = new System.Drawing.Point(156, 20); this.txt.Name = "txt"; this.txt.Size = new System.Drawing.Size(192, 21); this.txt.TabIndex = 1; this.txt.Text = ""; this.txt.KeyDown += new System.Windows.Forms.KeyEventHandler(this.txt_KeyDown); this.txt.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.txt_KeyPress); this.txt.TextChanged += new System.EventHandler(this.txt_TextChanged); this.txt.KeyUp += new System.Windows.Forms.KeyEventHandler(this.txt_KeyUp); // // cmd // this.cmd.FlatStyle = System.Windows.Forms.FlatStyle.System; this.cmd.Location = new System.Drawing.Point(156, 100); this.cmd.Name = "cmd"; this.cmd.Size = new System.Drawing.Size(88, 28); this.cmd.TabIndex = 4; this.cmd.Text = "Button1"; this.cmd.Click += new System.EventHandler(this.pic_Click); this.cmd.MouseUp += new System.Windows.Forms.MouseEventHandler(this.pic_MouseUp); this.cmd.MouseEnter += new System.EventHandler(this.pic_MouseEnter); this.cmd.MouseHover += new System.EventHandler(this.pic_MouseHover); this.cmd.MouseLeave += new System.EventHandler(this.pic_MouseLeave); this.cmd.MouseDown += new System.Windows.Forms.MouseEventHandler(this.pic_MouseDown); // // Label2 // this.Label2.Location = new System.Drawing.Point(20, 52); this.Label2.Name = "Label2"; this.Label2.Size = new System.Drawing.Size(128, 16); this.Label2.TabIndex = 2; this.Label2.Text = "Test mouse events here:"; // // Label3 // this.Label3.Location = new System.Drawing.Point(24, 105); this.Label3.Name = "Label3"; this.Label3.Size = new System.Drawing.Size(64, 24); this.Label3.TabIndex = 8; this.Label3.Text = "Label3"; // // lstLog // this.lstLog.Anchor = (((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) | System.Windows.Forms.AnchorStyles.Left) | System.Windows.Forms.AnchorStyles.Right); this.lstLog.IntegralHeight = false; this.lstLog.Location = new System.Drawing.Point(8, 161); this.lstLog.Name = "lstLog"; this.lstLog.Size = new System.Drawing.Size(384, 212); this.lstLog.TabIndex = 7; // // EventTracker // this.AutoScaleBaseSize = new System.Drawing.Size(5, 14); this.ClientSize = new System.Drawing.Size(400, 378); this.Controls.AddRange(new System.Windows.Forms.Control[] { this.GroupBox1, this.Label3, this.lstLog}); this.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0))); this.Name = "EventTracker"; this.Text = "Event Tracker"; this.GroupBox1.ResumeLayout(false); this.ResumeLayout(false); } #endregion private void Log(String data) { lstLog.Items.Add(data); int itemsPerPage = (int)(lstLog.Height / lstLog.ItemHeight); lstLog.TopIndex = lstLog.Items.Count - itemsPerPage; } /// <summary> /// The main entry point for the application. /// </summary> [STAThread] static void Main() { Application.Run(new EventTracker()); } private void txt_KeyDown(object sender, System.Windows.Forms.KeyEventArgs e) { Log("Key Down: " + e.KeyCode.ToString() + e.KeyValue.ToString()); } private void txt_KeyPress(object sender, System.Windows.Forms.KeyPressEventArgs e) { Log("Key Press: " + e.KeyChar.ToString()); } private void txt_KeyUp(object sender, System.Windows.Forms.KeyEventArgs e) { Log("Key Up: " + e.KeyCode.ToString() + e.KeyValue.ToString() + " Text is: " + txt.Text); } private void txt_TextChanged(object sender, System.EventArgs e) { Log("Changed: " + " Text is: " + txt.Text); } private void pic_MouseEnter(object sender, System.EventArgs e) { Log("Mouse Enter"); } private void pic_MouseHover(object sender, System.EventArgs e) { Log("Mouse Hover"); } private void pic_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e) { Log("Mouse Down: X=" + e.X.ToString() + "Y=" + e.Y.ToString() + " Button=" + e.Button.ToString()); } private void pic_MouseUp(object sender, System.Windows.Forms.MouseEventArgs e) { Log("Mouse Down: X=" + e.X.ToString() + "Y=" + e.Y.ToString() + " Button=" + e.Button.ToString()); } private void pic_Click(object sender, System.EventArgs e) { Log("Click"); } private void pic_DoubleClick(object sender, System.EventArgs e) { Log("Double Click"); } private void pic_MouseLeave(object sender, System.EventArgs e) { Log("Mouse Leave"); } } }
Get event name for sender
using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; public class Form1 : Form { Label Label1; TextBox TextBox1; Button Button1; public Form1() { InitializeComponent(); } private void ctrlClick(System.Object sender, EventArgs e) { Control ctrl = (Control)sender; MessageBox.Show("You clicked: " + ctrl.Name); } private void InitializeComponent() { this.Label1 = new System.Windows.Forms.Label(); this.TextBox1 = new System.Windows.Forms.TextBox(); this.Button1 = new System.Windows.Forms.Button(); this.SuspendLayout(); // // Label1 // this.Label1.FlatStyle = System.Windows.Forms.FlatStyle.System; this.Label1.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0))); this.Label1.Location = new System.Drawing.Point(14, 97); this.Label1.Name = "Label1"; this.Label1.Size = new System.Drawing.Size(112, 24); this.Label1.TabIndex = 8; this.Label1.Text = "Label1"; this.Label1.Click += new System.EventHandler(this.ctrlClick); // // TextBox1 // this.TextBox1.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0))); this.TextBox1.Location = new System.Drawing.Point(12, 61); this.TextBox1.Name = "TextBox1"; this.TextBox1.Size = new System.Drawing.Size(156, 21); this.TextBox1.TabIndex = 7; this.TextBox1.Text = "TextBox1"; this.TextBox1.Click += new System.EventHandler(this.ctrlClick); // // Button1 // this.Button1.FlatStyle = System.Windows.Forms.FlatStyle.System; this.Button1.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0))); this.Button1.Location = new System.Drawing.Point(12, 21); this.Button1.Name = "Button1"; this.Button1.Size = new System.Drawing.Size(96, 28); this.Button1.TabIndex = 6; this.Button1.Text = "Button1"; this.Button1.Click += new System.EventHandler(this.ctrlClick); // // Form1 // this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F); this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font; this.ClientSize = new System.Drawing.Size(367, 281); this.Controls.Add(this.Label1); this.Controls.Add(this.TextBox1); this.Controls.Add(this.Button1); this.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0))); this.Name = "Form1"; this.Text = "Control Medley"; this.ResumeLayout(false); this.PerformLayout(); } [STAThread] static void Main() { Application.EnableVisualStyles(); Application.Run(new Form1()); } }
Add mouse click event to a Label
using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; public class Form1 : Form { Label Label1; TextBox TextBox1; Button Button1; public Form1() { InitializeComponent(); } private void ctrlClick(System.Object sender, EventArgs e) { Control ctrl = (Control)sender; MessageBox.Show("You clicked: " + ctrl.Name); } private void InitializeComponent() { this.Label1 = new System.Windows.Forms.Label(); this.TextBox1 = new System.Windows.Forms.TextBox(); this.Button1 = new System.Windows.Forms.Button(); this.SuspendLayout(); // // Label1 // this.Label1.FlatStyle = System.Windows.Forms.FlatStyle.System; this.Label1.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0))); this.Label1.Location = new System.Drawing.Point(14, 97); this.Label1.Name = "Label1"; this.Label1.Size = new System.Drawing.Size(112, 24); this.Label1.TabIndex = 8; this.Label1.Text = "Label1"; this.Label1.Click += new System.EventHandler(this.ctrlClick); // // TextBox1 // this.TextBox1.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0))); this.TextBox1.Location = new System.Drawing.Point(12, 61); this.TextBox1.Name = "TextBox1"; this.TextBox1.Size = new System.Drawing.Size(156, 21); this.TextBox1.TabIndex = 7; this.TextBox1.Text = "TextBox1"; this.TextBox1.Click += new System.EventHandler(this.ctrlClick); // // Button1 // this.Button1.FlatStyle = System.Windows.Forms.FlatStyle.System; this.Button1.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0))); this.Button1.Location = new System.Drawing.Point(12, 21); this.Button1.Name = "Button1"; this.Button1.Size = new System.Drawing.Size(96, 28); this.Button1.TabIndex = 6; this.Button1.Text = "Button1"; this.Button1.Click += new System.EventHandler(this.ctrlClick); // // Form1 // this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F); this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font; this.ClientSize = new System.Drawing.Size(367, 281); this.Controls.Add(this.Label1); this.Controls.Add(this.TextBox1); this.Controls.Add(this.Button1); this.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0))); this.Name = "Form1"; this.Text = "Control Medley"; this.ResumeLayout(false); this.PerformLayout(); } [STAThread] static void Main() { Application.EnableVisualStyles(); Application.Run(new Form1()); } }