4.9.txt

《Microsoft Visual C# .NET 2003开发技巧大全》源代码

Listing 4.9 Creating an Indexer
using System;
using System.Text;
namespace _13_Indexers
{
class Class1
{
[STAThread]
static void Main(string[] args)
{
IntegerString val = new IntegerString();
val.num = 12345;
for( int i = 0; i < 2; i++ )
{
int swap;
swap = val[i];
val[i] = val[4-i];
val[4-i] = swap;
}
Console.WriteLine( val.num );
}
}
class IntegerString
{
public int num = 0;
public int this[int index]
{
get
{
return Int32.Parse(num.ToString()[index].ToString());
}
set
{
StringBuilder sValue = new StringBuilder(num.ToString());
sValue[index] = Char.Parse(value.ToString());
num = Int32.Parse(sValue.ToString());
}
}
}
}