C#的几个实用动态方法

C#的几个实用动态方法  

2009-03-21 14:16:34|  分类： C# |字号 订阅

    关于C#的运行时动态操作以前写过两篇《C# 运行时动态对象创建》、《C#动态方法调用》，本篇将再介绍几个实用函数，以方便使用。

public static class RuntimeHelper

{

public static object InvokeMember(string methodName, object target, params object[] args)

{

return target.GetType().InvokeMember(methodName,

System.Reflection.BindingFlags.InvokeMethod,

null, target, args);

}

public static object InvokeStaticMember(string methodName, Type targetType, params object[] args)

{

return targetType.InvokeMember(methodName,

System.Reflection.BindingFlags.Public

| System.Reflection.BindingFlags.InvokeMethod

| System.Reflection.BindingFlags.Static,

null, null, args);

}

public static object InvokeGetProperty(string methodName, object target, params object[] args)

{

return target.GetType().InvokeMember(methodName,

System.Reflection.BindingFlags.GetProperty,

null, target, args);

}

public static object InvokeStaticGetProperty(string methodName, Type targetType, params object[] args)

{

return targetType.InvokeMember(methodName,

System.Reflection.BindingFlags.GetProperty

| System.Reflection.BindingFlags.Static,

null, null, args);

}

public static T Parse<T>(string str)

{

return (T)InvokeStaticMember("Parse", typeof(T), str);

}

public static T Parse<T>(string str, T defaultValue)

{

T result; TryParse<T>(str, out result, defaultValue); return result;

}

public static bool TryParse<T>(string str, out T result, T defaultValue)

{

object[] args = new object[] { str, null };

if ((bool)typeof(T).InvokeMember("TryParse",

System.Reflection.BindingFlags.Public

| System.Reflection.BindingFlags.InvokeMethod

| System.Reflection.BindingFlags.Static,

null, null, args))

{

result = (T)args[1]; return true;

}

else

{

result = defaultValue; return false;

}

}

}