16.3. Retrieving methods from a type
You can retrieve a single MethodInfo object, if you already know the name of the method, or an array of MethodInfo objects.
In the following example, MyClass contains a method called DoThis() which takes in no parameters. Some useful methods of MethodInfo are demonstrated.
1: using System;
2: using System.Reflection;
3:
4: public class MyClass{
5: public static void DoThis(){
6: Console.WriteLine("doing this");
7: }
8: public static void DoThat(){
9: Console.WriteLine("doing that");
10: }
11: }
12:
13: public class TestClass{
14: public static void Main(){
15:
16: Type t = Type.GetType("MyClass");
17: MethodInfo m = t.GetMethod("DoThis");
18: Console.WriteLine("method :" + m);
19: Console.WriteLine("Name :" + m.Name);
20: Console.WriteLine("IsPublic :" + m.IsPublic);
21: Console.WriteLine("IsStatic :" + m.IsStatic);
22: Console.WriteLine("IsConstructor:" + m.IsConstructor);
23: Console.WriteLine("ReturnType :" + m.ReturnType);
24: }
25: }
Output:
c:expt>test method :Void DoThis() Name :DoThis IsPublic :True IsStatic :True IsConstructor:False ReturnType :System.Void
If you don't know the method name in the type, you can obtain an array of all MethodInfo objects in a particular type:
1: using System;
2: using System.Reflection;
3:
4: public class MyClass{
5: public static void DoThis(){
6: Console.WriteLine("doing this");
7: }
8: public void DoThat(int a, int b){
9: Console.WriteLine("doing that " + (a*b));
10: }
11: }
12:
13: public class TestClass{
14: public static void Main(){
15:
16: Type t = Type.GetType("MyClass");
17: MethodInfo[] methods = t.GetMethods();
18:
19: foreach (MethodInfo m in methods)
20: Console.WriteLine("method: " + m);
21: }
22: }
Output:
c:expt>test method: Int32 GetHashCode() method: Boolean Equals(System.Object) method: System.String ToString() method: Void DoThis() method: Void DoThat(Int32, Int32) method: System.Type GetType()
Notice that several methods such as GetHashCode, Equals, and ToString inherited from System.Object to MyClass are also retrieved.
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