When designing the framework architecture, one of the headaches is that reflection is everywhere, but with C #4.0, dynamic can completely replace reflection, which makes me a little excited, immediately in vs2010, the first reflection in the log tracker frameworkCodeUpgrading to C #4.0 is not disappointing at all, and the code is much simpler.
Let's take a look at the code after replacing 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 at 03/13/2009
9 *
10 * Update function:
11 * 1. Upgrade to C #4.0 and add dynamic to replace reflection.
12 * 2. If zivsoft. log. dll does not exist, logs are not output.
13 * 3. Project compilation does not depend on zivsoft. log. dll
14 *************************************** */
15 Namespace Zivsoft. Data
16 {
17 /// <Summary>
18 /// Only classes in the persistent data layer framework are available.
19 /// </Summary>
20 Internal Class Logger
21 {
22 Private Static Assembly _ assemblyfile;
23 Private Static Dynamic _ logger;
24 Static Logger ()
25 {
26 VaR strdllfile = Appdomain. currentdomain. basedirectory + " Zivsoft. log. dll " ;
27 If (File. exists (strdllfile ))
28 {
29 _ Assemblyfile = Assembly. LoadFile (strdllfile );
30 Try
31 {
32 _ Logger = _ Assemblyfile. createinstance ( " Zivsoft. log. Logger " , False , Bindingflags. createinstance, Null , Null , Null , Null );
33 }
34 Catch {
35 _ Logger = Null ;
36 }
37 }
38 }
39
40 Public Static Void Loginfo ( String Message, Params Object [] ARGs)
41 {
42 If ( Null ! = _ Logger)
43 {
44 _ Logger. loginfo (message, argS );
45 }
46 }
47
48 Public Static Void Logwarning ( String Message, Params Object [] ARGs)
49 {
50 If ( Null ! = _ Logger)
51 {
52 _ Logger. logwarning (message, argS );
53 }
54 }
55
56 Public Static Void Logerror ( String Message, Params Object [] ARGs)
57 {
58 If ( Null ! = _ Logger)
59 {
60 _ Logger. logerror (message, argS );
61 }
62 }
63
64 Public Static Void Logdebug ( String Message, Params Object [] ARGs)
65 {
66 If ( Null ! = _ Logger)
67 {
68 _ Logger. logdebug (message, argS );
69 }
70 }
71
72 Public Static Void Logerror (exception E)
73 {
74 Logerror ( " {0} " , E );
75 }
76 }
77 }
78
The above is the entrance code for the persistent data layer to call the log tracker. I used reflection. I just changed it with dynamic. After debugging, there was no problem at all, so I was delighted, because many of my frameworks adopt reflection mechanisms that may be replaced by dynamic, such as the reflected sqlserver, MySQL, access and other databases in the persistent data layer framework.
I don't want to write much. Let's take a closer look.
