模糊输入系统.反射

Question

Im getting a error when im parsing a method trough system.reflection:

System.Reflection.AmbiguousMatchException

typeof(Graphics).GetMethod("DrawRectangle").Invoke(g, new object[] {
     Pens.Red, new Rectangle(200, 200, 100, 50)
});

however it works nice when im parsing it trough the compiler

g.DrawRectangle(Pens.Red, new Rectangle(200,200,100,50));

is there a way to specify which method i want to call?

Answer 1

Graphics.DrawRectangle has 3 different overloads, so it is impossible to find concrete one via GetMethod just by name, you can specify parameter types for desired overload in GetMethod call:

typeof(Graphics).GetMethod("DrawRectangle", new[] {typeof(Pen), typeof(Rectangle)})

Answer 2

There are different overload for DrawRectangle.

Try something like this.

var args = new object[] { Pens.Red, new Rectangle(200, 200, 100, 50) };
 var r = 
 typeof(Graphics).GetMethod("DrawRectangle",System.Type.GetTypeArray(args));
 r.Invoke(g, args);