Hashtable的用法

发布: 2007-7-01 20:40 | 作者: admin | 来源: | 查看: 43次 | 进入软件测试论坛讨论

这个例子演示了Hashtable的用法，例子比较简单，主要是下面两个类的一些方法的override：

public class EmployeeID
{
private readonly char prefix;
private readonly int number;

  public EmployeeID( string id )
  {
   prefix = (id.ToUpper())[0];
   number = int.Parse ( id.Substring(1,3) );
  }

  public override string ToString()
  {
   return prefix.ToString () + string.Format( "{0,3:000}",number );
  }

  public override int GetHashCode()
  {
   return this.ToString().GetHashCode();
  }

  public override bool Equals(object obj)
  {
   EmployeeID rhs = obj as EmployeeID ;
   if( rhs == null )
    return false;
   if( prefix == rhs.prefix && number == rhs.number )
    return true;
   return false;
  }

}

public class EmployeeData
{
  private string name;
  private decimal salary;
  private EmployeeID id;

  public EmployeeData( EmployeeID id, string name, decimal salary)
  {
   this.id = id;
   this.name = name;
   this.salary = salary;
  }

  public override string ToString()
  {
   StringBuilder sb = new StringBuilder( id.ToString(), 100 );
   sb.Append (": ");
   sb.Append ( string.Format( "{0,-20}", name));
   sb.Append (" ");
   sb.Append (string.Format ( "{0:C}",salary));
   return sb.ToString ();
  }

}

具体的请参考源代码。