C#类的反射实例
创建在一个命名空间下的类Class1和不在同一个命名空间下的Class1；
（在这里这些类只使用于被调用的，意义不大。反射用法在Form类里面）
Class1和Form 窗体在同一个命名空间
using System;
using System.Collections.Generic;
using System.Text;
namespace fanshetest1
{
class Class1
{
private string ab="1";
public Class1(string aa)
{
a = aa;
}
public int aa(int x,int y)
{
return x+y+x+y;
}
public string bb()
{
return "bb";
}
public static string cc()
{
return "cc";
}
public string AB
{
get
{
return ab;
}
set
{
ab = value;
}
}
public string a;
}
}
Class1和Form 窗体在不同一个命名空间
using System;
using System.Collections.Generic;
using System.Text;
namespace fanshetest1
{
class Class1
{
private string ab="1";
public Class1(string aa)
{
a = aa;
}
public int aa(int x,int y)
{
return x+y+x+y;
}
public string bb()
{
return "bb";
}
public static string cc()
{
return "cc";
}
public string AB
{
get
{
return ab;
}
set
{
ab = value;
}
}
public string a;
}
}
下面是如何使用反射操作以上类；
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Reflection;
namespace fanshetest
{
public partial class Form1 : Form
{
System.Reflection.Assembly a;
System.Reflection.Assembly b;
public Form1()
{
InitializeComponent();
a = System.Reflection.Assembly.LoadFrom("Class1.DLL");
}
private void button1_Click(object sender, EventArgs e)
{
gouzaohanshu();
}
//没有传参数，返回一个类型；
private void One()
{
//再另建一个项目，在项目中引用上面生成的ClassLibrary1.DLL
System.Type t = a.GetType("Class1.Class1");
//动态生成ClassLibrary1.Class类的实例
Object theObj = System.Activator.CreateInstance(t);
//参数信息，GetSum需要两个string参数
System.Type[] paramTypes = new System.Type[2];
paramTypes[0] = System.Type.GetType("System.String");
paramTypes[1] = System.Type.GetType("System.String");
//System.Reflection.MethodInfo mi = t.GetMethod("aa", paramTypes);
System.Reflection.MethodInfo mi = t.GetMethod("bb");
//参数值
Object[] parameters = new Object[2];
parameters[0] = 3;
parameters[1] = 4;
Object returnValue = mi.Invoke(theObj, null);
this.textBox1.Text = returnValue.ToString();
}
//没有返回值，调用的是直接执行函数
private void None_void()
{
//再另建一个项目，在项目中引用上面生成的ClassLibrary1.DLL
System.Type t = a.GetType("Class1.Class2");
//动态生成ClassLibrary1.Class类的实例
Object theObj = System.Activator.CreateInstance(t);
//参数信息，GetSum需要两个string参数
System.Type[] paramTypes = new System.Type[2];
//此处调用方法，如果有参数只需要在括号的后面加上"，" 加上参数的type[]类型的参数
System.Reflection.MethodInfo mi = t.GetMethod("Mes");
Object returnValue = mi.Invoke(theObj, null);
}
//没有返回值，传出参数接收返回值；
private void Two()
{
Type t = a.GetType("Class1.Class1");
Object theObj = Activator.CreateInstance(t);
Type[] types=new Type[2];
types[0]=Type.GetType("System.Int32");
types[1]=Type.GetType("System.Int32");
Object[] obj=new Object[2];
obj[0]=2;
obj[1]=3;
MethodInfo mi = t.GetMethod("aa",types);
Object returnValue=mi.Invoke(theObj,obj);
this.textBox1.Text = returnValue.ToString();
}
//获取同一个命名空间的反射出值
private void Local()
{
Type t=Type.GetType("fanshetest1.Class1");
//创建一个 实例
Object theObj = Activator.CreateInstance(t);
Type[] types=new Type[2];
types[0]=Type.GetType("System.Int32");
types[1] = Type.GetType("System.Int32");
Object[] obj = new Object[2];
obj[0] = 2;
obj[1] = 3;
MethodInfo mi = t.GetMethod("aa",types);
Object returnValue = mi.Invoke(theObj,obj);
this.textBox1.Text = returnValue.ToString();
}
//获取出一个属性
private void attribute()
{
a = Assembly.LoadFrom("Class1.dll");
Type t = a.GetType("Class1.Class1");
t = Type.GetType("fanshetest1.Class1");
Object theObj = Activator.CreateInstance(t);
t.GetProperty("AB").SetValue(theObj,"a",null);
this.textBox1.Text = t.GetProperty("AB").GetValue(theObj, null).ToString();
}
//获取出静态的函数；
private void static_()
{
a = System.Reflection.Assembly.LoadFrom("Class1.dll");
Type t = a.GetType("Class1.Class1");
t = Type.GetType("fanshetest1.Class1");
//创建一个实例
Object theObj = Activator.CreateInstance(t);
//创建一个方法的实例
MethodInfo mi = t.GetMethod("cc");
Object returnValue = mi.Invoke(theObj, null);
this.textBox1.Text = returnValue.ToString();
}
//获取出变量；
private void variable()
{
a = Assembly.LoadFrom("Class1.dll");
Type t = a.GetType("Class1.Class1");
t = Type.GetType("fanshetest1.Class1");
Object theObj = Activator.CreateInstance(t);
MethodInfo mi = t.GetMethod("a");
t.GetField("a").SetValue(theObj,"a");
this.textBox1.Text = t.GetField("a").GetValue(theObj).ToString();
}
//获取出私有变量反射值；
private void private_()
{
}
//构造函数
private void gouzaohanshu()
{
Type t = a.GetType("Class1.Class1");
t = Type.GetType("fanshetest1.Class1");
//创建构造函数类型
Type[] structure_Type = new Type[1];
structure_Type[0] = Type.GetType("System.String");
//定义构造函数传参类型
Object[] structure_Obj = new Object[1];
structure_Obj[0] = "aa";
//创建一个 实例
Object theObj = Activator.CreateInstance(t,structure_Obj);
//MethodInfo structure_Mi = t.GetConstructor(structure_Type);
//MethodInfo structure_Mi = t.GetMethod("Class1", structure_Type);
//structure_Mi.Invoke(theObj, structure_Obj);
MethodInfo mi = t.GetMethod("a");
//t.GetField("a").SetValue(theObj, "a");
this.textBox1.Text = t.GetField("a").GetValue(theObj).ToString();
}
}
}
（在这里这些类只使用于被调用的，意义不大。反射用法在Form类里面）
Class1和Form 窗体在同一个命名空间
using System;
using System.Collections.Generic;
using System.Text;
namespace fanshetest1
{
class Class1
{
private string ab="1";
public Class1(string aa)
{
a = aa;
}
public int aa(int x,int y)
{
return x+y+x+y;
}
public string bb()
{
return "bb";
}
public static string cc()
{
return "cc";
}
public string AB
{
get
{
return ab;
}
set
{
ab = value;
}
}
public string a;
}
}
Class1和Form 窗体在不同一个命名空间
using System;
using System.Collections.Generic;
using System.Text;
namespace fanshetest1
{
class Class1
{
private string ab="1";
public Class1(string aa)
{
a = aa;
}
public int aa(int x,int y)
{
return x+y+x+y;
}
public string bb()
{
return "bb";
}
public static string cc()
{
return "cc";
}
public string AB
{
get
{
return ab;
}
set
{
ab = value;
}
}
public string a;
}
}
下面是如何使用反射操作以上类；
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Reflection;
namespace fanshetest
{
public partial class Form1 : Form
{
System.Reflection.Assembly a;
System.Reflection.Assembly b;
public Form1()
{
InitializeComponent();
a = System.Reflection.Assembly.LoadFrom("Class1.DLL");
}
private void button1_Click(object sender, EventArgs e)
{
gouzaohanshu();
}
//没有传参数，返回一个类型；
private void One()
{
//再另建一个项目，在项目中引用上面生成的ClassLibrary1.DLL
System.Type t = a.GetType("Class1.Class1");
//动态生成ClassLibrary1.Class类的实例
Object theObj = System.Activator.CreateInstance(t);
//参数信息，GetSum需要两个string参数
System.Type[] paramTypes = new System.Type[2];
paramTypes[0] = System.Type.GetType("System.String");
paramTypes[1] = System.Type.GetType("System.String");
//System.Reflection.MethodInfo mi = t.GetMethod("aa", paramTypes);
System.Reflection.MethodInfo mi = t.GetMethod("bb");
//参数值
Object[] parameters = new Object[2];
parameters[0] = 3;
parameters[1] = 4;
Object returnValue = mi.Invoke(theObj, null);
this.textBox1.Text = returnValue.ToString();
}
//没有返回值，调用的是直接执行函数
private void None_void()
{
//再另建一个项目，在项目中引用上面生成的ClassLibrary1.DLL
System.Type t = a.GetType("Class1.Class2");
//动态生成ClassLibrary1.Class类的实例
Object theObj = System.Activator.CreateInstance(t);
//参数信息，GetSum需要两个string参数
System.Type[] paramTypes = new System.Type[2];
//此处调用方法，如果有参数只需要在括号的后面加上"，" 加上参数的type[]类型的参数
System.Reflection.MethodInfo mi = t.GetMethod("Mes");
Object returnValue = mi.Invoke(theObj, null);
}
//没有返回值，传出参数接收返回值；
private void Two()
{
Type t = a.GetType("Class1.Class1");
Object theObj = Activator.CreateInstance(t);
Type[] types=new Type[2];
types[0]=Type.GetType("System.Int32");
types[1]=Type.GetType("System.Int32");
Object[] obj=new Object[2];
obj[0]=2;
obj[1]=3;
MethodInfo mi = t.GetMethod("aa",types);
Object returnValue=mi.Invoke(theObj,obj);
this.textBox1.Text = returnValue.ToString();
}
//获取同一个命名空间的反射出值
private void Local()
{
Type t=Type.GetType("fanshetest1.Class1");
//创建一个 实例
Object theObj = Activator.CreateInstance(t);
Type[] types=new Type[2];
types[0]=Type.GetType("System.Int32");
types[1] = Type.GetType("System.Int32");
Object[] obj = new Object[2];
obj[0] = 2;
obj[1] = 3;
MethodInfo mi = t.GetMethod("aa",types);
Object returnValue = mi.Invoke(theObj,obj);
this.textBox1.Text = returnValue.ToString();
}
//获取出一个属性
private void attribute()
{
a = Assembly.LoadFrom("Class1.dll");
Type t = a.GetType("Class1.Class1");
t = Type.GetType("fanshetest1.Class1");
Object theObj = Activator.CreateInstance(t);
t.GetProperty("AB").SetValue(theObj,"a",null);
this.textBox1.Text = t.GetProperty("AB").GetValue(theObj, null).ToString();
}
//获取出静态的函数；
private void static_()
{
a = System.Reflection.Assembly.LoadFrom("Class1.dll");
Type t = a.GetType("Class1.Class1");
t = Type.GetType("fanshetest1.Class1");
//创建一个实例
Object theObj = Activator.CreateInstance(t);
//创建一个方法的实例
MethodInfo mi = t.GetMethod("cc");
Object returnValue = mi.Invoke(theObj, null);
this.textBox1.Text = returnValue.ToString();
}
//获取出变量；
private void variable()
{
a = Assembly.LoadFrom("Class1.dll");
Type t = a.GetType("Class1.Class1");
t = Type.GetType("fanshetest1.Class1");
Object theObj = Activator.CreateInstance(t);
MethodInfo mi = t.GetMethod("a");
t.GetField("a").SetValue(theObj,"a");
this.textBox1.Text = t.GetField("a").GetValue(theObj).ToString();
}
//获取出私有变量反射值；
private void private_()
{
}
//构造函数
private void gouzaohanshu()
{
Type t = a.GetType("Class1.Class1");
t = Type.GetType("fanshetest1.Class1");
//创建构造函数类型
Type[] structure_Type = new Type[1];
structure_Type[0] = Type.GetType("System.String");
//定义构造函数传参类型
Object[] structure_Obj = new Object[1];
structure_Obj[0] = "aa";
//创建一个 实例
Object theObj = Activator.CreateInstance(t,structure_Obj);
//MethodInfo structure_Mi = t.GetConstructor(structure_Type);
//MethodInfo structure_Mi = t.GetMethod("Class1", structure_Type);
//structure_Mi.Invoke(theObj, structure_Obj);
MethodInfo mi = t.GetMethod("a");
//t.GetField("a").SetValue(theObj, "a");
this.textBox1.Text = t.GetField("a").GetValue(theObj).ToString();
}
}
}
