System.Type 类对于反射起着核心的作用。当反射请求加载的类型时，公共语言运行库将为它创建一个 Type。您可以使用 Type 对象的方法、字段、属性和嵌套类来查找有关该类型的所有信息。
大家运行一下下面的代码根据结果分析一下就能比较清楚的理解Type了
获取类型信息
namespace ConsoleApplication2
{
class Program
{
static void Main(string[] args)
{
MyClass m = new MyClass();
Type type = m.GetType();
Console.WriteLine("类型名:" + type.Name);
Console.WriteLine("类全名："+type.FullName);
Console.WriteLine("命名空间名:"+type.Namespace);
Console.WriteLine("程序集名："+type.Assembly);
Console.WriteLine("模块名:"+type.Module);
Console.WriteLine("基类名："+type.BaseType);
Console.WriteLine("是否类："+type.IsClass);
Console.WriteLine("类的公共成员：");
MemberInfo[] memberInfos = type.GetMembers();//得到所有公共成员
foreach (var item in memberInfos)
{
Console.WriteLine("{0}:{1}",item.MemberType,item);
}
}
}
class MyClass
{
public string m;
public void test()
{ }
public int MyProperty { get; set; }
namespace ConsoleApplication2
{
public class Example
{
private int factor;
public Example(int f)
{
factor = f;
}
public int SampleMethod(int x) { Console.WriteLine("\nExample.SampleMethod({0}) executes.", x); return x * factor; }
public static void Main() { //获取当前执行代码的程序集 Assembly assem = Assembly.GetExecutingAssembly();
Console.WriteLine("Assembly Full Name:"); Console.WriteLine(assem.FullName);
// The AssemblyName type can be used to parse the full name. AssemblyName assemName = assem.GetName(); Console.WriteLine("\nName: {0}", assemName.Name); Console.WriteLine("Version: {0}.{1}", assemName.Version.Major, assemName.Version.Minor); Console.WriteLine("\nAssembly CodeBase:"); Console.WriteLine(assem.CodeBase); // 从程序集众创建一个Example实例并且用object类型的引用o指向它，同时调用一个输入参数的构造函数 Object o = assem.CreateInstance("ConsoleApplication2.Example", false, BindingFlags.ExactBinding, null, new Object[] { 2 }, null, null);
//构造Example类的一个晚绑定的方法SampleMethod MethodInfo m = assem.GetType("ConsoleApplication2.Example").GetMethod("SampleMethod"); //调用刚才实例化好的Example对象o中的SampleMethod方法，传入的参数为42 Object ret = m.Invoke(o, new Object[] { 42 }); Console.WriteLine("SampleMethod returned {0}.", ret);
[Table("User")]
public class User
{
[Colum("userID", DbType = DbType.Int32)]
public int UserID { get; set; }
[Colum("UserName", DbType = DbType.String)]
public string UserName { get; set; }
}
表特性
[AttributeUsageAttribute(AttributeTargets.Class, Inherited = false, AllowMultiple = false)]
public class TableAttribute : Attribute
{
//保存表名的字段
private string _tableName;
public TableAttribute() { }
public TableAttribute(string tableName) { this._tableName = tableName; }
/// /// 映射的表名(表的全名:模式名.表名) /// public string TableName { set { this._tableName = value; } get { return this._tableName; } } }
列特性：
[AttributeUsageAttribute(AttributeTargets.Property, Inherited = false, AllowMultiple = false)]
public class ColumAttribute : Attribute
{
private string _columName;
private DbType _dbType ;
public ColumAttribute() { }
public ColumAttribute(string columName) : this() { this._columName = columName; }
TextFileLog
class TextFileLog : ILog
{
public bool Write(string message)
{
string fileDir = ConfigurationManager.AppSettings["LogTarget"].ToString();
using (StreamWriter w = File.AppendText(fileDir))
{
// w.Write(" Log Entry : ");
w.WriteLine("发生时间{0}", DateTime.Now.ToLocalTime().ToString());
w.WriteLine("日志内容为:{0}", message);
w.WriteLine("-------------------------------");
// Update the underlying file.
w.Flush();
w.Close();
}
return true;
}
public bool Write(Exception ex)
{
Write(ex.Message); return true; } }
XmlFileLog class XmlFileLog : ILog { public bool Write(string message) { string xmlFilePath = ConfigurationManager.AppSettings["LogTarget"].ToString(); if (File.Exists(xmlFilePath)) { XmlDocument doc = new XmlDocument(); doc.Load(xmlFilePath); XmlDocumentFragment docFrag = doc.CreateDocumentFragment(); XmlNode nod = doc.SelectSingleNode("Logs"); docFrag.InnerXml = "" + message + ""; nod.AppendChild(docFrag);
doc.Save(xmlFilePath); return true; } else { XmlWriterSettings settings = new XmlWriterSettings(); settings.Indent = true; //设置缩进 settings.ConformanceLevel = ConformanceLevel.Auto; settings.IndentChars = " "; settings.OmitXmlDeclaration = false; using (XmlWriter writer = XmlWriter.Create(xmlFilePath, settings)) { //Start writing the XML document writer.WriteStartDocument(false); //Start with the root element writer.WriteStartElement("Logs"); writer.WriteStartElement("Log"); writer.WriteStartElement("Time"); writer.WriteString(DateTime.Now.ToLocalTime().ToString()); writer.WriteEndElement(); writer.WriteStartElement("Message"); writer.WriteString(message); writer.WriteEndElement(); writer.WriteEndElement(); writer.WriteEndDocument(); //Flush the object and write the XML data to the file writer.Flush(); return true; }
} } public bool Write(Exception ex) { Write(ex.Message); return true;
Path.Combine(Environment.CurrentDirectory, "LogClassLibrary.dll"); Assembly a = Assembly.LoadFrom(assemblyPath); Type type = a.GetType(ConfigurationManager.AppSettings["LogType"].ToString()); LogClassLibrary.ILog log =
