从methodinfo获取代理 [英] Getting a delegate from methodinfo
问题描述
例如,
public delegate void MyDelegate(MyState state);
public static MyDelegate GetMyDelegateFromString(string methodName)
{
switch(methodName)
{
caseCallMethodOne:
返回MyFunctionsClass。 CallMethodOne;
caseCallMethodTwo:
return MyFunctionsClass.CallMethodTwo;
默认值:
返回MyFunctionsClass.CallMethodOne;
}
}
public static MyDelegate GetMyDelegateFromStringReflection(string methodName)
{
MyDelegate function = MyFunctionsClass.CallMethodOne;
输入inf = typeof(MyFunctionsClass);
foreach(inf.GetMethods()中的var方法)
{
if(method.Name == methodName)
{
// function = method;
//如何获取函数调用?
}
}
返回函数;
}
如何获取第二种方法的注释部分?如何将 MethodInfo
投入委托?
谢谢!
编辑:这是工作解决方案。
public static MyDelegate GetMyDelegateFromStringReflection methodName)
{
MyDelegate function = MyFunctionsClass.CallMethodOne;
输入inf = typeof(MyFunctionsClass);
foreach(inf.GetMethods()中的var方法)
{
if(method.Name == methodName)
{
function =(MyDelegate)Delegate.CreateDelegate (typeof(MyDelegate),方法);
}
}
返回函数;
}
你需要打电话某些形式的 Delegate.CreateDelegate(),具体取决于该方法是否为静态或实例方法。
I have a drop down list that is populated by inspecting a class's methods and including those that match a specific signature. The problem is in taking the selected item from the list and getting the delegate to call that method in the class. The first method works, but I cannot figure out part of the second.
For example,
public delegate void MyDelegate(MyState state);
public static MyDelegate GetMyDelegateFromString(string methodName)
{
switch (methodName)
{
case "CallMethodOne":
return MyFunctionsClass.CallMethodOne;
case "CallMethodTwo":
return MyFunctionsClass.CallMethodTwo;
default:
return MyFunctionsClass.CallMethodOne;
}
}
public static MyDelegate GetMyDelegateFromStringReflection(string methodName)
{
MyDelegate function = MyFunctionsClass.CallMethodOne;
Type inf = typeof(MyFunctionsClass);
foreach (var method in inf.GetMethods())
{
if (method.Name == methodName)
{
//function = method;
//how do I get the function to call?
}
}
return function;
}
How do I get the commented out section of the second method to work? How do I cast the MethodInfo
into the delegate?
Thanks!
Edit: Here is the working solution.
public static MyDelegate GetMyDelegateFromStringReflection(string methodName)
{
MyDelegate function = MyFunctionsClass.CallMethodOne;
Type inf = typeof(MyFunctionsClass);
foreach (var method in inf.GetMethods())
{
if (method.Name == methodName)
{
function = (MyDelegate)Delegate.CreateDelegate(typeof(MyDelegate), method);
}
}
return function;
}
You'll need to call some form of Delegate.CreateDelegate(), depending on whether the method in question is a static or instance method.
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