в 15:31, 26 мая 2010

2010-05-26T15:31:53Z

Admin: 1 версия

2010-05-26T12:15:49Z

1 версия

Новая страница

==Creating a list from a dictionary==

<source lang="csharp">using System;
using System.Collections;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Text;
public class MainClass
{
public static void Main()
{
IDictionary<string, DateTime> dictionary = new Dictionary<string, DateTime>();
List<KeyValuePair<string, DateTime>> keyValueList = new List<KeyValuePair<string, DateTime>>(dictionary);
}
}</source>

==IDictionary<TKey,TValue>: Add some entries into the dictionary==

<source lang="csharp">using System;
using System.Collections;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Text;
public class MainClass
{
public static void Main()
{
IDictionary<string, decimal> salaryMap = new Dictionary<string, decimal>();
salaryMap.Add("S", 60.5M);
salaryMap.Add("W", 10.0M);
salaryMap.Add("J", 30.99M);
}
}</source>

==IDictionary<TKey,TValue>: Check whether certain keys exist in the map==

<source lang="csharp">using System;
using System.Collections;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Text;
public class MainClass
{
public static void Main()
{
IDictionary<string, decimal> salaryMap = new Dictionary<string, decimal>();
salaryMap.Add("S", 60.5M);
salaryMap.Add("W", 10.0M);
salaryMap.Add("J", 30.99M);

Console.WriteLine(salaryMap.ContainsKey("S"));
Console.WriteLine(salaryMap.ContainsKey("T"));
}
}</source>
<pre class=codeResult>True
False</pre>

==IDictionary<TKey,TValue>: iterate over the map and add up the values==

<source lang="csharp">using System;
using System.Collections;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Text;
public class MainClass
{
public static void Main()
{
IDictionary<string, decimal> salaryMap = new Dictionary<string, decimal>();
salaryMap.Add("S", 60.5M);
salaryMap.Add("W", 10.0M);
salaryMap.Add("J", 30.99M);
decimal total = 0.0M;
foreach (decimal d in salaryMap.Values)
total += d;
Console.WriteLine("{0:C}", total);

}
}</source>
<pre class=codeResult>$101.49</pre>

==IDictionary<TKey,TValue>: Iterating over map/value pairs==

<source lang="csharp">using System;
using System.Collections;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Text;
public class MainClass
{
public static void Main()
{
IDictionary<string, decimal> salaryMap = new Dictionary<string, decimal>();
salaryMap.Add("S", 60.5M);
salaryMap.Add("W", 10.0M);
salaryMap.Add("J", 30.99M);
foreach (KeyValuePair<string, decimal> kvp in salaryMap)
Console.WriteLine("{0} == {1}", kvp.Key, kvp.Value);
}
}</source>
<pre class=codeResult>S == 60.5
W == 10.0
J == 30.99</pre>

==IDictionary<TKey,TValue>: remove one entry==

<source lang="csharp">using System;
using System.Collections;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Text;
public class MainClass
{
public static void Main()
{
IDictionary<string, decimal> salaryMap = new Dictionary<string, decimal>();
salaryMap.Add("S", 60.5M);
salaryMap.Add("W", 10.0M);
salaryMap.Add("J", 30.99M);

salaryMap.Remove("W");
}
}</source>

==IDictionary<TKey,TValue>: Retrieve some values from the map==

<source lang="csharp">using System;
using System.Collections;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Text;
public class MainClass
{
public static void Main()
{
IDictionary<string, decimal> salaryMap = new Dictionary<string, decimal>();
salaryMap.Add("S", 60.5M);
salaryMap.Add("W", 10.0M);
salaryMap.Add("J", 30.99M);

Console.WriteLine("{0:C}", salaryMap["S"]);
Console.WriteLine("{0:C}", salaryMap["J"]);
}
}</source>
<pre class=codeResult>$60.50
$30.99</pre>

← Предыдущая	Версия 15:31, 26 мая 2010
(нет различий)

Csharp/CSharp Tutorial/Data Structure/IDictionary - История изменений

в 15:31, 26 мая 2010

Admin: 1 версия