C#反射实例讲解
1 创建用于反射使用的DLL 新建一个C#类库项目,拷贝源代码如下,编译生成DLL(假如DLL的文件名是TestReflect.dll) |
1using System;
2
3namespace Webtest
4{
5 /// <summary>
6 /// ReflectTest 的摘要说明。
7 /// </summary>
8 public class ReflectTest
9 {
10 public ReflectTest()
11 {}
12
13 public string WriteString(string s)
14 {
15 return "欢迎您," + s;
16 }
17
18 /// <summary>
19 /// dsajkjflasjdfalksdjfaskfd
20 /// </summary>
21 /// <param name="s"></param>
22 /// <returns></returns>
23 public static string WriteName(string s)
24 {
25 return "欢迎您光临," + s;
26 }
27
28 public string WriteNoPara()
29 {
30 return "您使用的是无参数方法";
31 }
32 }
33}
34
35
36
2
3namespace Webtest
4{
5 /// <summary>
6 /// ReflectTest 的摘要说明。
7 /// </summary>
8 public class ReflectTest
9 {
10 public ReflectTest()
11 {}
12
13 public string WriteString(string s)
14 {
15 return "欢迎您," + s;
16 }
17
18 /// <summary>
19 /// dsajkjflasjdfalksdjfaskfd
20 /// </summary>
21 /// <param name="s"></param>
22 /// <returns></returns>
23 public static string WriteName(string s)
24 {
25 return "欢迎您光临," + s;
26 }
27
28 public string WriteNoPara()
29 {
30 return "您使用的是无参数方法";
31 }
32 }
33}
34
35
36
2 应用于反射的例子
在ASPNET页面中加入以下函数:
1public void test1()
2 {
3 System.Reflection.Assembly ass;
4 Type type ;
5 object obj;
6 try
7 {
8 ass = System.Reflection.Assembly.LoadFile(@"d:\TestReflect.dll");
9 type = ass.GetType("Webtest.ReflectTest");//必须使用名称空间+类名称
10 System.Reflection.MethodInfo method = type.GetMethod("WriteString");//方法的名称
11 obj = ass.CreateInstance("Webtest.ReflectTest");//必须使用名称空间+类名称
12 string s = (string)method.Invoke(obj,new string[]{"jianglijun"}); //实例方法的调用
13
14 Response.Write(s+"<br>");
15 method = type.GetMethod("WriteName");//方法的名称
16 s = (string)method.Invoke(null,new string[]{"jianglijun"}); //静态方法的调用
17 Response.Write(s+"<br>");
18
19 method = type.GetMethod("WriteNoPara");//无参数的实例方法
20 s = (string)method.Invoke(obj,null);
21 Response.Write(s+"<br>");
22 method = null;
23 }
24 catch(Exception ex)
25 {
26 Response.Write(ex+"<br>");
27 }
28 finally
29 {
30 ass = null;
31 type = null;
32 obj = null;
33 }
34 }
35
2 {
3 System.Reflection.Assembly ass;
4 Type type ;
5 object obj;
6 try
7 {
8 ass = System.Reflection.Assembly.LoadFile(@"d:\TestReflect.dll");
9 type = ass.GetType("Webtest.ReflectTest");//必须使用名称空间+类名称
10 System.Reflection.MethodInfo method = type.GetMethod("WriteString");//方法的名称
11 obj = ass.CreateInstance("Webtest.ReflectTest");//必须使用名称空间+类名称
12 string s = (string)method.Invoke(obj,new string[]{"jianglijun"}); //实例方法的调用
13
14 Response.Write(s+"<br>");
15 method = type.GetMethod("WriteName");//方法的名称
16 s = (string)method.Invoke(null,new string[]{"jianglijun"}); //静态方法的调用
17 Response.Write(s+"<br>");
18
19 method = type.GetMethod("WriteNoPara");//无参数的实例方法
20 s = (string)method.Invoke(obj,null);
21 Response.Write(s+"<br>");
22 method = null;
23 }
24 catch(Exception ex)
25 {
26 Response.Write(ex+"<br>");
27 }
28 finally
29 {
30 ass = null;
31 type = null;
32 obj = null;
33 }
34 }
35