Most Commonly used extensions and helper functions in ASP.NET C#

I am an ASP.NET C# web developer.

The architecture followed is 3 layer

The layers used are

1. UI

2. BLL (Sometimes Communicating with BLL is done using WebServices)

3. DAL

Pretty basic stuff.

What I would really like to have is a BLL.Common class in the BusinessLogics.

Here I would like to use some useful extensions and helper functions that we use in almost all applicat开发者_StackOverflow社区ions.

An example will IsNullOrEmpty extension.

Which are the helper functions most commonly used by developers?

It would be better if I could get a list.

Regards,

Naveen

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There are sooo many. Lets see (some (very few) from one of my reusable libs):

Generic Utils:

• public static bool AreEqual(object val1, object val2)
• public static bool IsNumber(string val, bool integerOnly, bool positiveOnly)

Reflection Utils:

• public static object Activate(string typeName)
• public static PropertyInfo Property(Type t, string prop)
• public static void SetValueSafe(string path, object target, object val) // Converts type to appropriate. Great for auto generated UIs
• public static object ConvertType(Type expectedType, object val)
• public static object GetValue(object target, string fullPath) // Allow dot expression

Logger Utils:

• Easy to use wrapper for log4net is a great help

File Utils: // Note all of these have to use streams safely (dispose them)

• public static void WriteFileContents(string filename, Stream contentStream)
• public static byte[] GetStreamContents(Stream stream)
• public static string GetTextFileContents(string file)
• public static void WriteFileContents(string filename, byte[] contents)
• public static void AssertDirIsReadWrite(string fileOrDir, bool attemptCreate)
• public static string GetZipFileTextContents(string file)
• public static void ZipFile(string file, string zipFile)
• public static void ZipFiles(string directory, string filter, string zipFile)
• public static string FindFileInDirectory(string file, string baseDirectory)
• public static void CopyDirectory(DirectoryInfo from, DirectoryInfo target)
• public static void ClearDirectory(DirectoryInfo dir)
• public static IEnumerable GetDirectories(string baseDir)
• public static IEnumerable GetFiles(string baseDir, string ext) // Recursive

Colleciton Utils:

• Add support for Linq like methods in non generic IEnumerable
• public static void ForEach(IEnumerable e, Action action) // This one is great!
• AreEqual
• ToString
• Cast
• IsNullOrEmptySort