自定义异常类(示例1).txt

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using System;
using System.IO;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Formatters.Soap;
namespace TestExce
{
	//允许实例被序列化
	[Serializable]
	sealed class DiskFullException:Exception,ISerializable
	{
		//三个公有构造器
		public DiskFullException():base()
		{}
		public DiskFullException(String message):base(message)
		{}
		public DiskFullException(String message,Exception innerException):base(message,innerException)
		{}
		//自定义字段
		private String diskpath;
		//自定义属性
		public String DiskPath
		{
			get{return diskpath;}
		}
		//重新异常消息文本
		public override String Message
		{
			get
			{
				String msg=base.Message;
				if(diskpath!=null)
					msg+=Environment.NewLine+"Disk Path:"+diskpath;
				return msg;
			}
		}
		//反序列化(新增字段必须)
		private DiskFullException(SerializationInfo info,StreamingContext context):base(info,context)
		{
			diskpath=info.GetString("DiskPath");
		}
		//序列化(新增字段必须)
		void ISerializable.GetObjectData(SerializationInfo info,StreamingContext context)
		{
			info.AddValue("DiskPath",diskpath);
			base.GetObjectData(info,context);
		}
		//定义额外的构造器
		public DiskFullException(String message,String diskpath):this(message)
		{
			this.diskpath=diskpath;
		}
		public DiskFullException(String message,String diskpath,Exception innerException):this(message,innerException)
		{
			this.diskpath=diskpath;
		}

	}
	class Class1
	{

		[STAThread]
		static void Main(string[] args)
		{
			//序列化
			DiskFullException e=new DiskFullException("The disk volume is full",@"C:\");
			FileStream fs=new FileStream(@"C:\Test.xml",FileMode.Create);
			IFormatter f=new SoapFormatter();
			f.Serialize(fs,e);
			fs.Close();
			//反序列化
			fs=new FileStream(@"C:\Test.xml",FileMode.Open);
			e=(DiskFullException)f.Deserialize(fs);
			fs.Close();
			Console.WriteLine("Type:{1}{0}DiskPath:{2}{0}Message:{3}",Environment.NewLine,e.GetType(),e.DiskPath,e.Message);
		}
	}
}