C #-Create an object instance using configuration files and reflection

To create an object instance using configuration files and reflection

In order to increase the scalability of the program and improve the configuration, it is often necessary to use configuration file + reflection to dynamically invoke the method.

The Sit class defined below contains an interface method that demonstrates how to use configuration files and reflection to invoke dynamically.

Using System;

namespace Consoleapp1.crmdatahandler

{

PublicclassSIT : crmdatahandler, iincident

{

Publicvoid createincident ()

{

Console. WriteLine ("{0} createincident", this. GetType ());

}

}

}

The configuration file is as follows:

<? XMLVersion="1.0"Encoding="utf-8" ?>

<configuration>

<appSettings>

<addkey="ClassName"value="ConsoleApp1.CRMDataHandler.SIT " />

<addkey="MethodName"value="createincident" />

</appSettings>

</configuration>

Instantiate the code and create the instantiated object in two ways:

<summary>

creating an Object instance using Activator

</summary>

Publicstaticvoid createdbyactivator ()

{

String typeName = ConfigurationManager. Appsettings.get ("ClassName");

String methodName = ConfigurationManager. Appsettings.get ("MethodName");

Type t = type. GetType (typeName);

Object instance = Activator. CreateInstance (t); //Create an instance

Object result = T.invokemember (MethodName, BindingFlags.InvokeMethod

, NULL, instance, NULL); Calling methods

T.getmethod (MethodName). Invoke (instance, null);

}

<summary>

To create an object instance using a constructor function

</summary>

Publicstaticvoid createdbyconstructor ()

{

String typeName = ConfigurationManager. Appsettings.get ("ClassName");

String methodName = ConfigurationManager. Appsettings.get ("MethodName");

Type t = type. GetType (typeName);

ConstructorInfo ci = t.getconstructor (newType[] {});

Object instance = Ci. Invoke (null);

T.getmethod (MethodName). Invoke (instance, null);

Object result = T.invokemember (methodName, BindingFlags.InvokeMethod, NULL, instance, NULL);

}

Execution Result:

C #-Create an object instance using configuration files and reflection