c# 反射调用
c# 反射调用
反射加载DLL
Assembly assembly = Assembly.Load("Ant.DB.SQLServer");//加载方式一：dll文件名（当前目录）
Assembly assembly1 = Assembly.LoadFile(@"E:\MyReflection\MyReflection\Ant.DB.SQLServer\bin\Debug\Ant.DB.Interface.dll");//加载方式二：完整路径(文件具体路径)
Assembly assembly2 = Assembly.LoadFrom("Ant.DB.SQLServer.dll");//方法三：完全限定名（当前目录）
Assembly assembly3 = Assembly.LoadFrom(@"E:\MyReflection\MyReflection\Ant.DB.SQLServer\bin\Debug\Ant.DB.Interface.dll");//(文件具体路径)
Console.WriteLine(assembly);
Console.WriteLine(assembly1);
Console.WriteLine(assembly2);
Console.WriteLine(assembly3);
foreach (var type in assembly.GetTypes())//找到所有类型
{
Console.WriteLine(type.Name);
foreach (var item in type.GetMethods())
{
Console.WriteLine("method.name= "+ item);
}
}
反射创建对象
Assembly assembly = Assembly.Load("Ant.DB.SQLServer");//加载方式一：dll文件名（当前目录）
Type SQLServer_type = assembly.GetType("Ant.DB.SQLServer.SQLServerHelper");
object obj = Activator.CreateInstance(SQLServer_type);
SQLServerHelper ServerHelper= obj as SQLServerHelper;
Students students = ServerHelper.Find(1);
Console.WriteLine(students);
Console.WriteLine("----------------------------------------Common--------------------------------");
使用反射创建对象（带参数的构造函数）
Assembly assembly = Assembly.LoadFrom("Ant.DB.SQLServer.dll");
Type type = assembly.GetType("Ant.DB.SQLServer.ReflectionTest");
ConstructorInfo[] constructorInfos = type.GetConstructors();
foreach (var constructor in constructorInfos)
{
Console.WriteLine(constructor);//显示类型
}
Console.WriteLine("************************创建对象************************");
object oCotr1 = Activator.CreateInstance(type);//无参数构造函数
object oCotr2 = Activator.CreateInstance(type,new object[] { "111"});
object oCotr3 = Activator.CreateInstance(type, new object[] { 123});
object oCotr4 = Activator.CreateInstance(type, new object[] { 123,"123" });
#region Common
Console.WriteLine("----------------------------------------Common--------------------------------");
使用反射创建对象（私有构造函数）
Assembly assembly = Assembly.LoadFrom("Ant.DB.SQLServer.dll");//加载DLL文件
Type type = assembly.GetType("Ant.DB.SQLServer.PrivateCtor");//获取到类型
object oPrivate = Activator.CreateInstance(type, true);
使用反射创建泛型类
Assembly assembly = Assembly.LoadFrom("Ant.DB.SQLServer.dll");//获取DLL文件
Type type = assembly.GetType("Ant.DB.SQLServer.GenericClass`3");//获取到类型名称
Type makeType = type.MakeGenericType(new Type[] { typeof(int), typeof(string), typeof(double) });
object oGeneric = Activator.CreateInstance(makeType);
通过反射调用方法
方法无参数
Assembly assembly = Assembly.LoadFrom("Ant.DB.SQLServer.dll");//获取DLL文件
Type type = assembly.GetType("Ant.DB.SQLServer.ReflectionTest");//获取到类型名称
object oReflection = 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 methodInfo = type.GetMethod("Test1");
methodInfo.Invoke(oReflection, null);//调用方法
}
方法携带参数
Assembly assembly = Assembly.LoadFrom("Ant.DB.SQLServer.dll");//获取DLL文件
Type type = assembly.GetType("Ant.DB.SQLServer.ReflectionTest");//获取到类型名称
object oReflection = 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 methodInfo = type.GetMethod("Test2");
methodInfo.Invoke(oReflection, new object[] {123456 });//调用方法,携带参数
}
有参数重载方法
Assembly assembly = Assembly.LoadFrom("Ant.DB.SQLServer.dll");//获取DLL文件
Type type = assembly.GetType("Ant.DB.SQLServer.ReflectionTest");//获取到类型名称
object oReflection = 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 methodInfo = type.GetMethod("Test3", new Type[] { typeof(int), typeof(string) });
methodInfo.Invoke(oReflection, new object[] { 133, "123" });//调用方法
}
无参数重载方法
Assembly assembly = Assembly.LoadFrom("Ant.DB.SQLServer.dll");//获取DLL文件
Type type = assembly.GetType("Ant.DB.SQLServer.ReflectionTest");//获取到类型名称
object oReflection = 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 methodInfo = type.GetMethod("Test3", new Type[] { });
methodInfo.Invoke(oReflection, null);//调用方法
}
静态方法调用
MethodInfo methodInfo = type.GetMethod("Test5");
methodInfo.Invoke(oReflection, new object[] { "123" });//调用方法
MethodInfo methodInfo = type.GetMethod("Test5");
methodInfo.Invoke(null, new object[] { "123" });//调用方法
Invoke第一个参数为对象的实例对象或null都可。
反射调用私有方法
Assembly assembly = Assembly.LoadFrom("Ant.DB.SQLServer.dll");//获取DLL文件
Type type = assembly.GetType("Ant.DB.SQLServer.ReflectionTest");//获取到类型名称
object oReflection = Activator.CreateInstance(type);
MethodInfo methodInfo = type.GetMethod("Test4", BindingFlags.Instance | BindingFlags.NonPublic);
methodInfo.Invoke(oReflection, new object[] { "123" });
反射调用普通类中的泛型方法
MethodInfo methodGeneric = methodInfo.MakeGenericMethod(new Type[] { typeof(int), typeof(string), typeof(DateTime) });//确定方法的参数类型和个数
methodGeneric.Invoke(oReflection, new object[] { 1, "Ant编程", DateTime.Now });
泛型类里的泛型方法调用
MethodInfo methodInfoNew = methodInfo.MakeGenericMethod(new Type[] { typeof(int), typeof(string), typeof(DateTime) });
methodInfoNew.Invoke(oReflection, new object[] { 1, "Ant编程", DateTime.Now });
反射操作字段和属性等成员
Assembly assembly = Assembly.LoadFrom("Ant.DB.SQLServer.dll");//获取DLL文件
Type type = assembly.GetType("Ant.DB.SQLServer.ReflectionTest");//获取到类型名称
object oReflection = Activator.CreateInstance(type);
Student studen = new Student()
{
Id = 1,
StudentAddress = "xx",
StudentName = "giao"
};
foreach (var prop in type.GetProperties())
{
Console.WriteLine($"{prop.PropertyType}+{prop.Name}={prop.GetValue(studen)}");
Console.WriteLine("-------------------------------------------------");
if (prop.Name.Equals("Id"))
{
prop.SetValue(studen, 2);
}
if (prop.Name.Equals("StudentName"))
{
prop.SetValue(studen, "giao");
}
if (prop.Name.Equals("StudentAddress"))
{
prop.SetValue(studen, "1111");
}
Console.WriteLine($"{prop.PropertyType}+{prop.Name}={prop.GetValue(studen)}");
}
还有个比较简单的方式
PropertyInfo[] propertyInfos = type.GetProperties();//查找所有的属性
PropertyInfo propertyInfo = type.GetProperty("Id");
