從字符串創建類和呼叫方法的實例

Question

String ClassName = "MyClass" 
String MethodName = "MyMethod" 

我想實現：

var class = new MyClass; 
MyClass.MyMethod(); 

我看到一些例如用反射，但他們只顯示，或者有一個方法名稱作爲字符串或類名字符串，任何幫助讚賞。

Answer 1

// Find a type you want to instantiate: you need to know the assembly it's in for it, we assume that all is is one assembly for simplicity 
// You should be careful, because ClassName should be full name, which means it should include all the namespaces, like "ConsoleApplication.MyClass" 
// Not just "MyClass" 
Type type = Assembly.GetExecutingAssembly().GetType(ClassName); 
// Create an instance of the type 
object instance = Activator.CreateInstance(type); 
// Get MethodInfo, reflection class that is responsible for storing all relevant information about one method that type defines 
MethodInfo method = type.GetMethod(MethodName); 
// I've assumed that method we want to call is declared like this 
// public void MyMethod() { ... } 
// So we pass an instance to call it on and empty parameter list 
method.Invoke(instance, new object[0]); 

Answer 2

類似的東西，可能有更多的檢查：

string typeName = "System.Console"; // remember the namespace 
string methodName = "Clear"; 

Type type = Type.GetType(typeName); 

if (type != null) 
{ 
    MethodInfo method = type.GetMethod(methodName); 

    if (method != null) 
    { 
     method.Invoke(null, null); 
    } 
} 

需要注意的是，如果你有參數傳遞，那麼你就需要改變method.Invoke到

method.Invoke(null, new object[] { par1, par2 });