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WPF Control Factory

, 20 Apr 2010
This article explains some advantages and disadvantages of factories, and shows one to use for generating WPF Controls.
WpfControlsAndSample.zip
WpfControlsAndSample
Pfz.ClassLibraries
Pfz
Caching
Collections
DataTypes
Extensions
Pfz.snk
Properties
Ranges
Threading
Pfz.WpfControls
BoundGridParts
Extensions
Pfz.WpfControls.snk
Properties
TypeConverters
WpfControlFactorySample
bin
Debug
Pfz.dll
Pfz.WpfControls.dll
WpfControlFactorySample.exe
Properties
Settings.settings
WpfControlFactorySample.suo
using System;

namespace Pfz.DataTypes
{
	/// <summary>
	/// Simple wrapper for string with validations for Emails.
	/// </summary>
	[Serializable]
	public struct EmailString:
		IEquatable<EmailString>
	{
		private string fValue;
		
		/// <summary>
		/// Creates a new EmailString with the given value.
		/// Throws an exception if the e-mail is invalid.
		/// </summary>
		public EmailString(string value)
		{
			if (string.IsNullOrEmpty(value))
				fValue = null;
			else
			{
				if (!Validate(value))
					throw new ArgumentException("The given parameter is not a valid e-mail.");
				
				fValue = value;
			}
		}
		
		/// <summary>
		/// Validates if the given string is a valid e-mail.
		/// </summary>
		public static bool Validate(string value)
		{
			if (string.IsNullOrEmpty(value))
				return false;
				
			value = value.Trim();
			
			int indexAt = value.IndexOf('@');
			if (indexAt < 1)
				return false;
			
			if (value.IndexOf('.', indexAt) == -1)
				return false;
			
			if (value.IndexOf(';') != -1)
				return false;
			
			return true;
		}
		
		/// <summary>
		/// Gets the real-string.
		/// </summary>
		public override string ToString()
		{
			return fValue;
		}
		
		/// <summary>
		/// Gets the hashcode of the real string.
		/// </summary>
		public override int GetHashCode()
		{
			if (fValue == null)
				return 0;
				
			return fValue.GetHashCode();
		}
		
		/// <summary>
		/// Compares this object to another object.
		/// </summary>
		public override bool Equals(object obj)
		{
			if (obj is EmailString)
			{
				EmailString other = (EmailString)obj;
				return Equals(other);
			}
			
			return base.Equals(obj);
		}
		
		/// <summary>
		/// Compares this PasswordString with another PasswordString.
		/// </summary>
		public bool Equals(EmailString other)
		{
			return fValue == other.fValue;
		}
	}
}

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About the Author

Paulo Zemek
Architect
Canada Canada
I started to program computers when I was 11 years old, as a hobbist, programming in AMOS Basic and Blitz Basic for Amiga.
At 12 I had my first try with assembler, but it was too difficult at the time. Then, in the same year, I learned C and, after learning C, I was finally able to learn assembler (for Motorola 680x0).
Not sure, but probably between 12 and 13, I started to learn C++. I always programmed "in an object oriented way", but using function pointers instead of virtual methods.
 
At 15 I started to learn Pascal at school and to use Delphi. At 16 I started my first internship (using Delphi). At 18 I started to work professionally using C++ and since then I've developed my programming skills as a professional developer in C++ and C#, generally creating libraries that help other developers do they work easier, faster and with less errors.
 
Want more info or simply want to contact me?
Take a look at: http://paulozemek.azurewebsites.net/
Or e-mail me at: paulozemek@outlook.com
 
Codeproject MVP 2012
Microsoft MVP 2013

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