Mega Code Archive
Indexing with an String Indexer
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using System;
using System.Collections;
class Pair
{
public Pair(string name, object data)
{
this.name = name;
this.data = data;
}
public string Name
{
get
{
return(name);
}
set
{
name = value;
}
}
public object Data
{
get
{
return(data);
}
set
{
data = value;
}
}
string name;
object data;
}
class PairList
{
public PairList()
{
row = new ArrayList();
}
public void Load()
{
/* load code here */
row.Add(new Pair("Q", 5551212));
row.Add(new Pair("A", "text"));
row.Add(new Pair("B", 2355.23m));
}
public Pair this[int column]
{
get
{
return( (Pair) row[column - 1]);
}
set
{
row[column - 1] = value;
}
}
int FindPair(string name)
{
for (int index = 0; index < row.Count; index++)
{
Pair Pair = (Pair) row[index];
if (Pair.Name == name)
return(index);
}
return(-1);
}
public Pair this[string name]
{
get
{
return( (Pair) this[FindPair(name)]);
}
set
{
this[FindPair(name)] = value;
}
}
ArrayList row;
}
class Test
{
public static void Main()
{
PairList row = new PairList();
row.Load();
Pair val = row["A"];
Console.WriteLine("A: {0}", val.Data);
Console.WriteLine("B: {0}", row["B"].Data);
row["Q"].Data = "new value"; // set the name
Console.WriteLine("Q: {0}", row["Q"].Data);
}
}
A: 5551212
B: text
Unhandled Exception: System.ArgumentOutOfRangeException: Index was out of range. Must be non-negativ
e and less than the size of the collection.
Parameter name: index
at System.Collections.ArrayList.get_Item(Int32 index)
at PairList.get_Item(Int32 column)
at Test.Main()
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