关于C#异常处理!

王朝c#·作者佚名  2006-11-24
窄屏简体版  字體: |||超大  

using System;

namespace ConsoleApplication2

{

/// <summary>

/// Class1 的摘要说明。

/// </summary>

class Class1

{

static string[] eTypes={"none","simple","index","nested index"};

[STAThread]

static void Main(string[] args)

{

foreach(string eType in eTypes)

{

try

{

Console.WriteLine("Main() try block reached.");

Console.WriteLine("ThrowException(\"{0}\") called.",eType);

ThrowException(eType);

Console.WriteLine("Main() try block continues.");

}

catch(System.IndexOutOfRangeException e)

{

Console.WriteLine("Main() System.IndexOutOfRangeException catch "+

" block reched.Message:\n\"{0}\"",e.Message);

}

catch

{

Console.WriteLine("Main() general catch block reached.");

}

finally

{

Console.WriteLine("Main() finally block reached.");

}

Console.WriteLine();

}

}

static void ThrowException(string exceptionType)

{

Console.Write("ThrowException(\"{0}\")reached.",exceptionType);

switch(exceptionType)

{

case "none":

Console.WriteLine("Not throwing an exception.");

break;

case "simple":

Console.WriteLine("Throwing System.Exception.");

throw(new System.Exception());

break;

case "index":

Console.WriteLine("Throwing System.IndexOutOfRangeexception.");

eTypes[4]="error";

break;

case "nested index":

try

{

Console.WriteLine("ThrowException(\"nested index\"):"+"tyr block reached.");

Console.WriteLine("ThrowException(\"index\")called.");

ThrowException("index");

}

catch

{

Console.WriteLine("ThrowException(\"nested index\")general"+" catch block reached.");

}

finally

{

Console.WriteLine("ThrowException(\"nested index\")finally"+"block reached.");

}

break;

}

}

}

}

此异常的处理说明,异常产生后,如果在当前未做Try处理,则会返到上一级,如果还未做,则返回上一级的上一级....以此类推.如果被任意一级Catch到,则上一级不会再得到.

 
 
 
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