Dynamic usage of c#4.0 (i.)--Using reflection skillfully

In peacetime do frame architecture design, one of the headaches is everywhere to adopt reflection, but with c#4.0, found dynamic can replace reflection, this feature makes me a little excited, immediately in the VS2010 log tracker frame of the first reflection of the code to upgrade to C # 4.0, the results are not disappointing at all, the code simplifies a lot.

Let's take a look at the code that replaces the reflection with dynamic:

1 using System;


2 using System.Collections.Generic;


3 using System.Linq;


4 using System.Text;


5 using System.Reflection;


6 using System.IO;


7/********************************


8 * Updated by Lihua in 03/13/2009


9 *


10 * Update function:


11 * 1. Upgrade to c#4.0, add dynamic instead of reflection


12 * 2. If Zivsoft.Log.dll does not exist, the log does not output


13 * 3. Project compilation does not depend on Zivsoft.Log.dll


14 ****************************************/


namespace Zivsoft.data


16 {


///<summary>


18///only provides class usage in a persistent data-tier framework


///</summary>


Internal class Logger


21 {


private static Assembly _assemblyfile;


private static dynamic _logger;


static Logger ()


25 {


var strdllfile = AppDomain.CurrentDomain.BaseDirectory + "Zivsoft.Log.dll";


if (file.exists (strdllfile))


28 {


_assemblyfile = Assembly.loadfile (strdllfile);


Try


31 {


_logger = _assemblyfile.createinstance ("Zivsoft.Log.Logger", False, Bindingflags.createinstan CE, NULL, NULL, NULL, NULL);


33}


Catch {


_logger = null;


36}


37}


38}


39


public static void Loginfo (String message, params object[] args)


41 {


-if (null!= _logger)


43 {


_logger. Loginfo (message, args);


45}


46}


47


public static void Logwarning (String message, params object[] args)


49 {


if (null!= _logger)


51 {


_logger. logwarning (message, args);


53}


54}


55


public static void Logerror (String message, params object[] args)


57 {


(null!= _logger)


59 {


_logger. Logerror (message, args);


61}


62}


63


public static void Logdebug (String message, params object[] args)


65 {


if (null!= _logger)


67 {


_logger. Logdebug (message, args);


69}


70}


71


, public static void Logerror (Exception e)


73 {


Logerror ("{0}", e);


75}


76}


77}


78

The above is the entry code for the persistent data layer call log tracker, used to reflect, just I changed with the dynamic over, debugging a little problem, so it makes me happy, because the next many of my frameworks using reflection mechanism will be able to be replaced by dynamic, such as "persistent data layer framework" A database of reflected SQL Server, MySQL, access, and so on.

Do not write more, everyone carefully understand it.