零散的代码-1
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace ConsoleApplication6
{
class Program
{
[Developer("李四", "1", Reviewed = true)]
public void SomeMethod()
{
}
public static void GetAttribute(Type t)
{
DeveloperAttribute myAtt = (DeveloperAttribute)Attribute.GetCustomAttribute(t, typeof(DeveloperAttribute));
if (myAtt == null)
{
Console.WriteLine("没找到特性");
}
else
{
Console.WriteLine("特性名 {0}", myAtt.Name);
Console.WriteLine("特性名 {0}", myAtt.Level);
Console.WriteLine("特性名 {0}", myAtt.Reviewed);
}
}
static void Main(string[] args)
{
}
}
[AttributeUsage(AttributeTargets.All)]
public class DeveloperAttribute : System.Attribute
{
private string name;
private string level;
private bool reviewed;
public DeveloperAttribute(string name,string level)
{
this.name = name;
this.level = level;
this.reviewed = false;
}
public virtual string Name
{
get { return name; }
}
public virtual string Level
{
get { return level; }
}
public virtual bool Reviewed
{
get
{
return reviewed ;
}
set
{
reviewed = value;
}
}
}
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace ConsoleApplication4
{
[Obsolete("该方法已经过时",true)]
public class OldClass
{
[Obsolete("该方法已经过时 请使用NEW",true )]
public void OldMethod()
{
Console.WriteLine("old");
}
public void NewMethod()
{
Console.WriteLine("New");
}
}
class Program
{
static void Main(string[] args)
{
OldClass o = new OldClass();
o.OldMethod();
o.NewMethod();
}
}
}
//#define DEBUG //这里定义条件
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;
using System.Diagnostics;
namespace ConsoleApplication3
{
class Program
{
[DllImport("User32.dll")]
public static extern int MessageBox(int hParent, string Message, string Caption, int Type);
static void Main(string[] args)
{
DisplayRunningMessage();
MessageBox(0, "helolo", "Message", 0);
Console.ReadLine();
}
[Conditional("DEBUG")]
private static void DisplayRunningMessage()
{
Console.WriteLine("开始运行Main子程序。当前时间是" + DateTime.Now);
}
[Conditional("DEBUG")]
[Obsolete]
private static void DisplayDebugMessage()
{
Console.WriteLine("开始Main子程序");
}
}
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Reflection;
using System.Reflection.Emit;
namespace ConsoleApplication9
{
public class Test
{
public static Assembly CreateAssembly()
{
AssemblyName assemblyName = new AssemblyName();
assemblyName.Name = "math";
//创建程序集
AssemblyBuilder createdAssembly = AppDomain.CurrentDomain.DefineDynamicAssembly(assemblyName, AssemblyBuilderAccess.RunAndSave);
//定义程序集模块
ModuleBuilder assemblyMouble = createdAssembly.DefineDynamicModule("mathModule","math.dll");
//定义类型
TypeBuilder mathType = assemblyMouble.DefineType("IntOp", TypeAttributes.Public | TypeAttributes.Class);
//创建方法
System.Type[] paramTypes = new Type[]
{
typeof(int),typeof(int)
};
ModuleBuilder addMethod = mathType.DefineMethod("Add", MethodAttributes.Public, typeof(int),paramTypes);
//创建方法的参数
ParameterBuilder param1 = addMethod.DefineParameter(1, ParameterAttributes.In, "num1"); //--点不出来
ParameterBuilder param2 = addMethod.DefineParameter(2, ParameterAttributes.In, "num2"); //--点不出来
//生成方法的中间语言代码
ILGenerator ilGenerator = addMethod.GetILGenerator(); //--点不出来
ilGenerator.Emit(OpCodes.Ldarg_1);
ilGenerator.Emit(OpCodes.Ldarg_2);
ilGenerator.Emit(OpCodes.Add);
ilGenerator.Emit(OpCodes.Ret);
//创建类型
mathType.CreateType();
//保存程序集
createdAssembly.Save("math.dll");
return createdAssembly();
}
static object CallAssembly(Assembly assembly, string className, string methodName, object[] args)
{
//获取动态加载类型
Type t = assembly.GetType(className);
//构造实例类型
object obj = Activator.CreateInstance(t);
//获得要调用的方法
MethodInfo mi = t.GetMethod(methodName);
//调用方法
return mi.Invoke(obj, args);
}
static void Main()
{
//动态创建
Assembly a = CreateAssembly();
//动态调用程序集中的类型的方法
object[] args = new object[] { 2, 3 };
int i = (int)CallAssembly(a, "IntOp", "Add", args);
Console.WriteLine("2 + 3 = {0}", i);
}
}
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
namespace ConsoleApplication10
{
//委托
public delegate void GetDataCallback(int lineCount); //
public class DataForThread
{
private string text;
private int number;
private GetDataCallback callback; //
public DataForThread(string text, int number,GetDataCallback callback)
{
this.text = text;
this.number = number;
this.callback = callback; //
}
// 线程执行的方法
public void ThreadProc()
{
int lineCount = 0;
Console.WriteLine("\t 线程开始执行的方法 ");
lineCount++;
for (int i = 0; i < number ; i++)
{
Console.WriteLine("\t\t<{0}>-------执行线程", i + 1,text );
lineCount++;
}
Console.WriteLine("结束线程-----------");
lineCount++;
if (callback != null)
callback(lineCount);
}
public class Test
{
public static void Main()
{
DataForThread dft = new DataForThread("启动",6,new GetDataCallback(ResultCallback));
Thread t = new Thread(new ThreadStart(dft.ThreadProc));
t.Start();
Console.ReadKey();
}
}
//回调方法
public static void ResultCallback(int lineCount)
{
Console.WriteLine(" 线程打印了{0} 行文字", lineCount);
}
}
}
public void WriteFile(string str)
{
StreamWriter sr;
if (File.Exists(FILE_NAME)) //如果文件存在,则创建File.AppendText对象
{
sr = File.AppendText(FILE_NAME);
}
else //如果文件不存在,则创建File.CreateText对象
{
sr = File.CreateText(FILE_NAME);
}
sr.WriteLine(str);
sr.Close();
}
