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Lazy Alternatives - LazyAndWeak and BackgroundLoader

, 1 Dec 2011 CPOL 10.7K 305 25
This article will present two alternatives to Lazy.
LazyAlternatives.zip
LazyAlternatives
LazyAlternatives.suo
LazyAlternativesSample
Properties
Settings.settings
Pfz
Caching
Collections
DataTypes
DynamicObjects
Internal
Extensions
Factoring
Pfz.csproj.user
Pfz.Phone.csproj.user
Pfz.ruleset
Pfz.Silverlight.csproj.user
Pfz.snk
Pfz.suo
PhoneSpecific
Properties
Remoting
Instructions
Internal
Serializers
Udp
Serialization
BinaryBuiltIn
Threading
Contexts
Disposers
Unsafe
using System;
using System.Reflection;

namespace Pfz.Extensions
{
	/// <summary>
	/// Adds methods to work easily with Enums.
	/// </summary>
	public static class PfzDisplayNameExtensions
	{
		#region GetDisplayName
			/// <summary>
			/// Gets the display name of an enumerated value.
			/// If no EnumDisplayName attribute is set, uses the default enum name.
			/// </summary>
			/// <param name="enumValue">The enum value to get the display name.</param>
			/// <returns>The display name.</returns>
			public static string GetDisplayName(this Enum enumValue)
			{
				if (enumValue == null)
					return null;
			
				string name = enumValue.ToString();
				FieldInfo fieldInfo = enumValue.GetType().GetField(name);
				
				if (fieldInfo == null)
					return name;
					
				var attribute = fieldInfo.GetCustomAttribute<DisplayNameAttribute>();
				
				if (attribute != null)
					return attribute.DisplayName;

				return name;
			}
			
			/// <summary>
			/// Gets the DisplayName of a member, or it's real name if it does
			/// not have a DisplayName.
			/// </summary>
			/// <param name="memberInfo">The member to get the display name for.</param>
			/// <returns>A name.</returns>
			public static string GetDisplayName(this MemberInfo memberInfo)
			{
				if (memberInfo == null)
					return null;

				if (memberInfo.MemberType == MemberTypes.Property)
				{
					PropertyInfo propertyInfo = (PropertyInfo)memberInfo;
					return propertyInfo.GetDisplayName();
				}

				var attribute = memberInfo.GetCustomAttribute<DisplayNameAttribute>();
				if (attribute == null)
					return memberInfo.Name;

				return attribute.DisplayName;
			}

			/// <summary>
			/// Gets the DisplayName of the given property.
			/// If the property does not have a display name and has the same name of its
			/// PropertyType, then the DisplayName of the PropertyType is used.
			/// </summary>
			public static string GetDisplayName(this PropertyInfo propertyInfo)
			{
				if (propertyInfo == null)
					return null;

				var attribute = propertyInfo.GetCustomAttribute<DisplayNameAttribute>();
				if (attribute != null)
					return attribute.DisplayName;

				Type propertyType = propertyInfo.PropertyType;
				string name = propertyInfo.Name;
				if (name == propertyType.Name)
					return propertyType.GetDisplayName();

				return name;
			}
		#endregion
	}
}

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About the Author

Paulo Zemek
Engineer Microsoft Corporation
United States United States
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.

Now I just started working as a Senior Software Engineer at Microsoft.

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, 2015
Microsoft MVP 2013-2014

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