反射之关于MethodInfo的使用

1、MethodInfo类是在System.Reflection命名空间底下，既然是在Reflection空间底下。故名思议关于反射相关的操作，其中比较重要的方法是Invoke()方法，它
是加载相同程序集的方法。简单用法

string command = "AnnouncementSave";
//通过反射获取调用的具体方法
System.Reflection.MethodInfo method = this.GetType().GetMethod(command);
if (method != null)
{
//Execute Method
method.Invoke(this, new object[] { context });
}

调用方法：

public void AnnouncementSave(HttpContext context)
{

}

2.一段使用了很多反射技术的代码

public CommonValid(object m)
        {
            if (m != null)
            {
                PropertyInfo[] pis = m.GetType().GetProperties();
                if (pis != null)
                {
                    foreach (PropertyInfo pi in pis)
                    {
                        object[] attrs = System.Attribute.GetCustomAttributes(pi);
                        foreach (object attr in attrs)
                        {
                            if (attr.GetType().Namespace == "Soffice.DevelopFramework.Common.Valid")
                            {
                                Type t = typeof(Soffice.DevelopFramework.Common.Valid.Methods);
                                MethodInfo mi = t.GetMethod(attr.GetType().Name);
                                if (mi != null)
                                {
                                    bool result = (bool)mi.Invoke(null, new object[] { attr, pi.GetValue(m, null) });
                                    if (!result)
                                    {
                                        ValidResult validResult = new ValidResult();

                                        MethodInfo MethodGetNum = attr.GetType().GetMethod("GetNum");
                                        if (MethodGetNum != null)
                                        {
                                            validResult.Num = (int)MethodGetNum.Invoke(attr, null);
                                        }
                                        //ValidResult validResult = new ValidResult();
                                        //validResult.Num = int.Parse(t.GetProperty("Num").GetValue(attr, null).ToString());

                                        //listValid.Add(validResult);
                                    }
                                }
                            }
                        }
                    }
                }
            }
        }