使用
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如果想要检查并操作泛型类型和方法，请参见 |
下面的示例显示在获取程序集的
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// Gets the mscorlib assembly in which the object is defined.
Assembly a = typeof(Object).Module.Assembly;
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下面的示例说明如何从已加载的程序集中获取 Type 对象。
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// Loads an assembly using its file name.
Assembly a = Assembly.LoadFrom ("MyExe.exe");
// Gets the type names from the assembly.
Type [] types2 = a.GetTypes ();
foreach (Type t in types2)
{
Console.WriteLine (t.FullName);
}
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在获取了一个 Type 后，您可以采用许多方法来发现与该类型的成员有关的信息。例如，通过调用
您也可以在 Type 类上使用方法，以检索有关按名称指定的一个或多个构造函数、方法、事件、字段或属性的信息。例如，
如果具有 Type，则可以使用
System.Type 和 ConstructorInfo
下面的示例演示如何列出一个类（此示例中为
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// This program lists all the public constructors
// of the System.String class.
using System;
using System.Reflection;
class ListMembers {
public static void Main(String[] args) {
Type t = typeof(System.String);
Console.WriteLine ("Listing all the public constructors of the {0} type", t);
// Constructors.
ConstructorInfo[] ci = t.GetConstructors(BindingFlags.Public | BindingFlags.Instance);
Console.WriteLine ("//Constructors");
PrintMembers (ci);
}
public static void PrintMembers(MemberInfo [] ms) {
foreach (MemberInfo m in ms) {
Console.WriteLine ("{0}{1}", " ", m);
}
Console.WriteLine();
}
}
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MemberInfo、MethodInfo、FieldInfo 和 PropertyInfo
使用
下面的示例使用 MemberInfo 列出 System.IO.File 类中的成员数量并使用
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using System;
using System.IO;
using System.Reflection;
class Mymemberinfo
{
public static void Main(string[] args)
{
Console.WriteLine ("\nReflection.MemberInfo");
// Gets the Type and MemberInfo.
Type MyType =Type.GetType("System.IO.File");
MemberInfo[] Mymemberinfoarray = MyType.GetMembers();
// Gets and displays the DeclaringType method.
Console.WriteLine("\nThere are {0} members in {1}.",
Mymemberinfoarray.Length, MyType.FullName);
Console.WriteLine("{0}.", MyType.FullName);
if (MyType.IsPublic)
{
Console.WriteLine("{0} is public.", MyType.FullName);
}
}
}
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下面的示例调查指定成员的类型。它对 MemberInfo 类的一个成员执行反射，然后列出其类型。
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// This code displays information about the GetValue method of FieldInfo.
using System;
using System.Reflection;
class MyMethodInfo {
public static int Main() {
Console.WriteLine("Reflection.MethodInfo");
// Gets and displays the Type.
Type MyType = Type.GetType("System.Reflection.FieldInfo");
// Specifies the member for which you want type information.
MethodInfo Mymethodinfo = MyType.GetMethod("GetValue");
Console.WriteLine(MyType.FullName + "." + Mymethodinfo.Name);
// Gets and displays the MemberType property.
MemberTypes Mymembertypes = Mymethodinfo.MemberType;
if (MemberTypes.Constructor == Mymembertypes) {
Console.WriteLine("MemberType is of type All");
}
else if (MemberTypes.Custom == Mymembertypes) {
Console.WriteLine("MemberType is of type Custom");
}
else if (MemberTypes.Event == Mymembertypes) {
Console.WriteLine("MemberType is of type Event");
}
else if (MemberTypes.Field == Mymembertypes) {
Console.WriteLine("MemberType is of type Field");
}
else if (MemberTypes.Method == Mymembertypes) {
Console.WriteLine("MemberType is of type Method");
}
else if (MemberTypes.Property == Mymembertypes) {
Console.WriteLine("MemberType is of type Property");
}
else if (MemberTypes.TypeInfo == Mymembertypes) {
Console.WriteLine("MemberType is of type TypeInfo");
}
return 0;
}
}
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下面的示例使用所有的反射 *Info 类以及
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// This program lists all the members of the
// System.IO.BufferedStream class.
using System;
using System.IO;
using System.Reflection;
class ListMembers {
public static void Main(String[] args) {
// Specifies the class.
Type t = typeof (System.IO.BufferedStream);
Console.WriteLine ("Listing all the members (public and non public) of the {0} type", t);
// Lists static fields first.
FieldInfo [] fi = t.GetFields (BindingFlags.Static |
BindingFlags.NonPublic | BindingFlags.Public);
Console.WriteLine ("// Static Fields");
PrintMembers (fi);
// Static properties.
PropertyInfo [] pi = t.GetProperties (BindingFlags.Static |
BindingFlags.NonPublic | BindingFlags.Public);
Console.WriteLine ("// Static Properties");
PrintMembers (pi);
// Static events.
EventInfo [] ei = t.GetEvents (BindingFlags.Static |
BindingFlags.NonPublic | BindingFlags.Public);
Console.WriteLine ("// Static Events");
PrintMembers (ei);
// Static methods.
MethodInfo [] mi = t.GetMethods (BindingFlags.Static |
BindingFlags.NonPublic | BindingFlags.Public);
Console.WriteLine ("// Static Methods");
PrintMembers (mi);
// Constructors.
ConstructorInfo [] ci = t.GetConstructors (BindingFlags.Instance |
BindingFlags.NonPublic | BindingFlags.Public);
Console.WriteLine ("// Constructors");
PrintMembers (ci);
// Instance fields.
fi = t.GetFields (BindingFlags.Instance | BindingFlags.NonPublic |
BindingFlags.Public);
Console.WriteLine ("// Instance Fields");
PrintMembers (fi);
// Instance properites.
pi = t.GetProperties (BindingFlags.Instance | BindingFlags.NonPublic |
BindingFlags.Public);
Console.WriteLine ("// Instance Properties");
PrintMembers (pi);
// Instance events.
ei = t.GetEvents (BindingFlags.Instance | BindingFlags.NonPublic |
BindingFlags.Public);
Console.WriteLine ("// Instance Events");
PrintMembers (ei);
// Instance methods.
mi = t.GetMethods (BindingFlags.Instance | BindingFlags.NonPublic
| BindingFlags.Public);
Console.WriteLine ("// Instance Methods");
PrintMembers (mi);
Console.WriteLine ("\r\nPress ENTER to exit.");
Console.Read();
}
public static void PrintMembers (MemberInfo [] ms) {
foreach (MemberInfo m in ms) {
Console.WriteLine ("{0}{1}", " ", m);
}
Console.WriteLine();
}
}
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