.Net Framework 4.5 New Feature - Caller Information, Zip Compression

1. Caller Information

Caller Information can help us in tracing, debugging and creating diagnose tools. This is the new core feature in the .net Framework 4.5. It will help us to avoid duplicate codes which are generally invoked in many methods for same purpose, such as logging and tracing. This feature is implemented using new compiler services in 4.5 and helps us to get caller method's name, its line number and file path. This feature helps us in logging.

We could get the below information of caller method:

·         CallerFilePathAttribute

Allows you to obtain the full path of the source file that contains the caller. This is the file path at the time of compile.

·         CallerLineNumberAttribute

 

Allows you to obtain the line number in the source file at which the method is called.

·         CallerMemberNameAttribute

 

You apply the CallerMemberName attribute to an optional parameter that has a default value. You must specify an explicit default value for the optional parameter. You can't apply this attribute to parameters that aren't specified as optional.

 

How to use:

1.       Open the new Console Application using VS Studio 2012

2.       Add the Name space System.Runtime.CompilerServices

3.       See the below code regarding the use of CallerMemberName, CallerLineNumber and CallerFilePath attributes part of System.Runtime.CompilerServices namespace to get details of caller's method as shown below:

 

using System; using System.Runtime.CompilerServices;   namespace ConsoleApplication1 {     class Program     {         static void Main(string[] args)         {             InsertLog("Main method error message.");             TestMethod();             Console.ReadKey();         }           private static void TestMethod()         {             InsertLog("TestMethod failed.");         }           private static void InsertLog(string errorMessage, [CallerMemberName] string memberName = ""                        , [CallerFilePath] string sourceFilePath = "", [CallerLineNumber] int sourceLineNumber = 0)         {             Console.WriteLine("Error message : " + errorMessage + "\r\nCalled From: " + memberName + " Method \r\nLine Number: " + sourceLineNumber.ToString() + "\r\nFile Path: " + sourceFilePath);             Console.WriteLine("\n------------------------------------");         }       } }

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2. Zip Compression

Earlier .net framework does not support for the Zip Compression. The developers has to use the third party utilities.  4.5 .net Framework version supports for the zip compression and extraction which is supported by most of all the operating systems. Zip compression improvements to reduce the size of a compressed file

The System.IO.Compression namespace contains classes that provide basic compression and decompression services for streams.

Below example shows how to create and extract a zip archive by using the ZipFile class. It compresses the contents of a folder into a zip archive, and then extracts that content to a new folder. To use the ZipFile class, you must reference the System.IO.Compression.FileSystem assembly in your project.

using System; using System.IO.Compression;     namespace ConsoleApplication1 {     class Program     {         static void Main(string[] args)         {             string startPath = @"D:\Junk\source";             string zipPath = @"d:\junk\result.zip";             string extractPath = @"d:\junk\extract";             ZipFile.CreateFromDirectory(startPath, zipPath);             ZipFile.ExtractToDirectory(zipPath, extractPath);             Console.ReadKey();         }     } }