using System;
using System.Threading;
public delegate int DelegateClass(out DateTime start,out DateTime stop);
public class Starter {
public static void Main() {
DelegateClass del = MethodA;
DateTime start;
DateTime stop;
IAsyncResult ar = del.BeginInvoke(out start, out stop,null, null);
ar.AsyncWaitHandle.WaitOne();
int elapse = del.EndInvoke(out start, out stop, ar);
Console.WriteLine("Start time: {0}", start.ToLongTimeString());
Console.WriteLine("Stop time: {0}", stop.ToLongTimeString());
Console.WriteLine("Elapse time: {0} seconds",elapse);
}
public static int MethodA(out DateTime start, out DateTime stop) {
start = DateTime.Now;
Thread.Sleep(5000);
stop = DateTime.Now;
return (stop - start).Seconds;
}
}
Author: coder
What happens if an unhandled exception is raised in a multicast delegate?
using System;
using System.Threading;
public delegate void DelegateClass();
public class Starter {
public static void Main() {
Console.WriteLine("Running on primary thread");
try {
DelegateClass del = MethodA;
IAsyncResult ar = del.BeginInvoke(null, null);
del.EndInvoke(ar);
} catch (Exception except) {
Console.WriteLine("Running on primary thread");
Console.WriteLine("Exception caught: " + except.Message);
}
}
public static void MethodA() {
if (Thread.CurrentThread.IsThreadPoolThread == true) {
Console.WriteLine("Running on a thread pool thread");
} else {
Console.WriteLine("Running on primary thread");
}
throw new Exception("failure");
}
}
Get Top Parent Culture
///////////////////////////////////////////////////////////////////////////////////////////////
//
// This File is Part of the CallButler Open Source PBX (http://www.codeplex.com/callbutler
//
// Copyright (c) 2005-2008, Jim Heising
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modification,
// are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// * Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation and/or
// other materials provided with the distribution.
//
// * Neither the name of Jim Heising nor the names of its contributors may be
// used to endorse or promote products derived from this software without specific prior
// written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
// IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
// INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
// NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
// WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//
///////////////////////////////////////////////////////////////////////////////////////////////
using System;
using System.Collections.Generic;
using System.Text;
using System.Globalization;
namespace WOSI.Utilities
{
public class GlobalizationUtils
{
public static CultureInfo GetTopParentCulture(CultureInfo culture)
{
CultureInfo currentCulture = culture;
while (currentCulture.Parent != System.Globalization.CultureInfo.InvariantCulture)
currentCulture = currentCulture.Parent;
return currentCulture;
}
}
}
International Text
/*
Professional Windows GUI Programming Using C#
by Jay Glynn, Csaba Torok, Richard Conway, Wahid Choudhury,
Zach Greenvoss, Shripad Kulkarni, Neil Whitlow
Publisher: Peer Information
ISBN: 1861007663
*/
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
namespace Wrox.ProgrammingWindowsGUI.Chapter5
{
/// <summary>
/// Summary description for Form1.
/// </summary>
public class InternationalText : System.Windows.Forms.Form
{
internal System.Windows.Forms.Label lblInternationalText;
internal System.Windows.Forms.Label lblCharCode;
private System.Windows.Forms.TextBox textBox1;
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.Container components = null;
public InternationalText()
{
//
// 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.lblInternationalText = new System.Windows.Forms.Label();
this.lblCharCode = new System.Windows.Forms.Label();
this.textBox1 = new System.Windows.Forms.TextBox();
this.SuspendLayout();
//
// lblInternationalText
//
this.lblInternationalText.Location = new System.Drawing.Point(8, 64);
this.lblInternationalText.Name = "lblInternationalText";
this.lblInternationalText.Size = new System.Drawing.Size(288, 23);
this.lblInternationalText.TabIndex = 0;
//
// lblCharCode
//
this.lblCharCode.Location = new System.Drawing.Point(8, 96);
this.lblCharCode.Name = "lblCharCode";
this.lblCharCode.Size = new System.Drawing.Size(88, 23);
this.lblCharCode.TabIndex = 2;
//
// textBox1
//
this.textBox1.Location = new System.Drawing.Point(8, 24);
this.textBox1.Name = "textBox1";
this.textBox1.Size = new System.Drawing.Size(288, 20);
this.textBox1.TabIndex = 3;
this.textBox1.Text = "";
this.textBox1.KeyPress += new System.Windows.Forms.KeyPressEventHandler(this.textBox1_KeyPress);
//
// InternationalText
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(304, 134);
this.Controls.AddRange(new System.Windows.Forms.Control[] {
this.textBox1,
this.lblCharCode,
this.lblInternationalText});
this.MaximizeBox = false;
this.Name = "InternationalText";
this.Text = "InternationalText";
this.ResumeLayout(false);
}
#endregion
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new InternationalText());
}
protected override void OnInputLanguageChanged(InputLanguageChangedEventArgs e)
{
MessageBox.Show(e.InputLanguage.Culture.Name);
}
protected override void OnInputLanguageChanging(InputLanguageChangingEventArgs e)
{
MessageBox.Show(e.InputLanguage.Culture.Name);
}
private void textBox1_KeyPress(object sender, System.Windows.Forms.KeyPressEventArgs e)
{
lblInternationalText.Text += e.KeyChar.ToString();
lblCharCode.Text = ((int)e.KeyChar).ToString();
}
}
}
Get the Hash code for string value
using System;
public class HashValues {
public static void Main( ) {
String[] identifiers ={“A”,”B”,”C”,”D”,”E”,”F”,”G”,”H”,”I”,”J”,”K”,”L”};
for(int i = 0; i < identifiers.Length; i++) { String id = identifiers[i]; int hash = id.GetHashCode(); int code = hash % 23; Console.WriteLine("{0,-12}{1,12}{2,12}", id, hash, code); } } } [/csharp]
Class behaves properly using overridden Equals and GetHashCode methods
using System;
using System.Collections;
public class GoodCompare {
public static void Main() {
Name president = new Name ("A", "B");
Name first = new Name ("C", "D");
Console.WriteLine("The hash codes for first and president are: ");
if (president.GetHashCode() == first.GetHashCode())
Console.WriteLine("equal");
else
Console.WriteLine("not equal");
}
}
public class Name {
protected String first;
protected char initial;
protected String last;
public Name(String f, String l) {
first = f;
last = l;
}
public Name(String f, char i, String l) : this(f,l) {
initial = i;
}
public override String ToString() {
if (initial == 'u0000')
return first + " " + last;
else
return first + " " + initial + " " + last;
}
public override bool Equals(Object o) {
if (!(o is Name))
return false;
Name name = (Name)o;
return first == name.first && initial == name.initial
&& last == name.last;
}
public override int GetHashCode() {
return first.GetHashCode() + (int)initial
+ last.GetHashCode();
}
}
This code example demonstrates the Guid.NewGuid() method.
using System;
class Sample
{
public static void Main()
{
Guid g;
// Create and display the value of two GUIDs.
g = Guid.NewGuid();
Console.WriteLine(g);
Console.WriteLine(Guid.NewGuid());
}
}