1. 获取程序集
代码语言：javascript复制 Assembly assembly = Assembly.Load("Ruanmou.DB.MySql");
//1 动态加载 一个完整dll名称不需要后缀 从exe所在的路径进行查找
Assembly assembly1 = Assembly.LoadFile(@"D:ruanmouonline1220181212Advanced12Course2ReflectionMyReflectionMyReflectionbinDebugRuanmou.DB.MySql.dll");//完整路径
Assembly assembly2 = Assembly.LoadFrom("Ruanmou.DB.MySql.dll");//当前路径
Assembly assembly3 = Assembly.LoadFrom(@"D:ruanmouonline1220181212Advanced12Course2ReflectionMyReflectionMyReflectionbinDebugRuanmou.DB.MySql.dll");//当前路径2. 获取类型，创建对象，调用方法
代码语言：javascript复制 Console.WriteLine("************************Reflection************************");
Assembly assembly = Assembly.Load("Ruanmou.DB.MySql");//1 动态加载
Type type = assembly.GetType("Ruanmou.DB.MySql.MySqlHelper");//2 获取类型 完整类型名称
object oDBHelper = Activator.CreateInstance(type);//3 创建对象
IDBHelper iDBHelper = oDBHelper as IDBHelper;//4 类型转换 不报错，类型不对就返回null
iDBHelper.Query();//5 方法调用3. 获取不同的构造函数， 根据不同的构造函数创建不同的实例对象
代码语言：javascript复制 Assembly assembly = Assembly.Load("Ruanmou.DB.SqlServer");
Type type = assembly.GetType("Ruanmou.DB.SqlServer.ReflectionTest");
foreach (ConstructorInfo ctor in type.GetConstructors())
{
Console.WriteLine(ctor.Name);
foreach (var parameter in ctor.GetParameters())
{
Console.WriteLine(parameter.ParameterType);
}
}
object oTest1 = Activator.CreateInstance(type);
object oTest2 = Activator.CreateInstance(type, new object[] { 123 });
object oTest3 = Activator.CreateInstance(type, new object[] { "陌殇" });4. 反射，创建单例的实例对象
代码语言：javascript复制 //反射破坏单例---就是反射调用私有构造函数
Assembly assembly = Assembly.Load("Ruanmou.DB.SqlServer");
Type type = assembly.GetType("Ruanmou.DB.SqlServer.Singleton");
Singleton singletonA = (Singleton)Activator.CreateInstance(type, true);
Singleton singletonB = (Singleton)Activator.CreateInstance(type, true);
Singleton singletonC = (Singleton)Activator.CreateInstance(type, true);
Singleton singletonD = (Singleton)Activator.CreateInstance(type, true);
Console.WriteLine($"{object.ReferenceEquals(singletonA, singletonD)}");5, 反射，创建泛型类实例对象
代码语言：javascript复制 Assembly assembly = Assembly.Load("Ruanmou.DB.SqlServer");
Type type = assembly.GetType("Ruanmou.DB.SqlServer.GenericClass`3");
//GenericClass<string, int, DateTime> genicClass = new GenericClass<string, int, DateTime>();
//object oGeneric = Activator.CreateInstance(type);
Type typeMake = type.MakeGenericType(new Type[] { typeof(string), typeof(int), typeof(DateTime) });
object oGeneric = Activator.CreateInstance(typeMake);6. 反射，调用重载方法
代码语言：javascript复制 Assembly assembly = Assembly.Load("Ruanmou.DB.SqlServer");
Type type = assembly.GetType("Ruanmou.DB.SqlServer.ReflectionTest");
object oTest = Activator.CreateInstance(type);
foreach (var method in type.GetMethods())
{
Console.WriteLine(method.Name);
foreach (var parameter in method.GetParameters())
{
Console.WriteLine($"{parameter.Name} {parameter.ParameterType}");
}
}
{
MethodInfo method = type.GetMethod("Show1");
//if()
method.Invoke(oTest, null);
}
{
MethodInfo method = type.GetMethod("Show2");
method.Invoke(oTest, new object[] { 123 });
}
{
MethodInfo method = type.GetMethod("Show3", new Type[] { });
method.Invoke(oTest, null);
}
{
MethodInfo method = type.GetMethod("Show3", new Type[] { typeof(int) });
method.Invoke(oTest, new object[] { 123 });
}
{
MethodInfo method = type.GetMethod("Show3", new Type[] { typeof(string) });
method.Invoke(oTest, new object[] { "一生为你" });
}
{
MethodInfo method = type.GetMethod("Show3", new Type[] { typeof(int), typeof(string) });
method.Invoke(oTest, new object[] { 234, "心欲无痕" });
}
{
MethodInfo method = type.GetMethod("Show3", new Type[] { typeof(string), typeof(int) });
method.Invoke(oTest, new object[] { "PHS", 345 });
}
{
MethodInfo method = type.GetMethod("Show5");
method.Invoke(oTest, new object[] { "张中魁" });//静态方法实例可以要
}
{
MethodInfo method = type.GetMethod("Show5");
method.Invoke(null, new object[] { "张中魁" });//静态方法实例也可以不要
}7. 反射，调用私有方法
代码语言：javascript复制 Assembly assembly = Assembly.Load("Ruanmou.DB.SqlServer");
Type type = assembly.GetType("Ruanmou.DB.SqlServer.ReflectionTest");
object oTest = Activator.CreateInstance(type);
var method = type.GetMethod("Show4", BindingFlags.Instance | BindingFlags.NonPublic);
method.Invoke(oTest, new object[] { "我是老王" });8. 反射，调用泛型方法
代码语言：javascript复制 Console.WriteLine("********************GenericMethod********************");
Assembly assembly = Assembly.Load("Ruanmou.DB.SqlServer");
Type type = assembly.GetType("Ruanmou.DB.SqlServer.GenericMethod");
object oGeneric = Activator.CreateInstance(type);
//foreach (var item in type.GetMethods())
//{
// Console.WriteLine(item.Name);
//}
MethodInfo method = type.GetMethod("Show");
var methodNew = method.MakeGenericMethod(new Type[] { typeof(int), typeof(string), typeof(DateTime) });
object oReturn = methodNew.Invoke(oGeneric, new object[] { 123, "董小姐", DateTime.Now });9. 反射，调用泛型类的泛型方法
代码语言：javascript复制 Assembly assembly = Assembly.Load("Ruanmou.DB.SqlServer");
Type type = assembly.GetType("Ruanmou.DB.SqlServer.GenericDouble`1").MakeGenericType(typeof(int));
object oObject = Activator.CreateInstance(type);
MethodInfo method = type.GetMethod("Show").MakeGenericMethod(typeof(string), typeof(DateTime));
method.Invoke(oObject, new object[] { 345, "感谢有梦", DateTime.Now });10. 反射，ORM
代码语言：javascript复制 Type type = typeof(People);
object oPeople = Activator.CreateInstance(type);
foreach (var prop in type.GetProperties())
{
Console.WriteLine($"{type.Name}.{prop.Name}={prop.GetValue(oPeople)}");
if (prop.Name.Equals("Id"))
{
prop.SetValue(oPeople, 234);
}
else if (prop.Name.Equals("Name"))
{
prop.SetValue(oPeople, "饿了么");
}
Console.WriteLine($"{type.Name}.{prop.Name}={prop.GetValue(oPeople)}");
}
foreach (var field in type.GetFields())
{
Console.WriteLine($"{type.Name}.{field.Name}={field.GetValue(oPeople)}");
if (field.Name.Equals("Description"))
{
field.SetValue(oPeople, "并不是外卖，也不是真的饿了");
}
Console.WriteLine($"{type.Name}.{field.Name}={field.GetValue(oPeople)}");
}11, 反射，DTO
代码语言：javascript复制 Type typePeople = typeof(People);
Type typePeopleDTO = typeof(PeopleDTO);
object peopleDTO = Activator.CreateInstance(typePeopleDTO);
foreach (var prop in typePeopleDTO.GetProperties())
{
//if (prop.Name.Equals("Id"))
//{
// //object value = typePeople.GetProperty("Id").GetValue(people);
// object value = typePeople.GetProperty(prop.Name).GetValue(people);
// prop.SetValue(peopleDTO, value);
//}
//else if (prop.Name.Equals("Name"))
//{
// //object value = typePeople.GetProperty("Name").GetValue(people);
// object value = typePeople.GetProperty(prop.Name).GetValue(people);
// prop.SetValue(peopleDTO, value);
//}
object value = typePeople.GetProperty(prop.Name).GetValue(people);
prop.SetValue(peopleDTO, value);
}
foreach (var filed in typePeopleDTO.GetFields())
{
object value = typePeople.GetField(filed.Name).GetValue(people);
filed.SetValue(peopleDTO, value);
}知识介绍：https://blog.csdn.net/sinolover/article/details/104159239
