Csharp/CSharp Tutorial/Data Structure/SortedList

Add element to SortedList by using the indexer.

using System; 
using System.Collections; 
 
class MainClass { 
  public static void Main() { 
    SortedList sl = new SortedList(); 
     
    sl.Add("a", "A"); 
    sl.Add("b", "B"); 
    sl.Add("c", "C"); 
    sl.Add("d", "D"); 
    // add by using the indexer. 
    sl["e"] = "E"; 
 
    // Get a collection of the keys. 
    ICollection c = sl.Keys; 
 
    // Display list using integer indexes. 
    Console.WriteLine("Contents by integer indexes."); 
    for(int i=0; i<sl.Count; i++) 
      Console.WriteLine(sl.GetByIndex(i)); 
      
  }
}

Contents by integer indexes.
A
B
C
D
E

Add value to SortedList and get contents by integer indexes

using System; 
using System.Collections; 
 
class MainClass { 
  public static void Main() { 
    SortedList sl = new SortedList(); 
     
    sl.Add("a", "A"); 
    sl.Add("b", "B"); 
    sl.Add("c", "C"); 
    sl.Add("d", "D"); 
 
    // Get a collection of the keys. 
    ICollection c = sl.Keys; 
 
    // Display list using integer indexes. 
    Console.WriteLine("Contents by integer indexes."); 
    for(int i=0; i<sl.Count; i++) 
      Console.WriteLine(sl.GetByIndex(i)); 
      
  }
}

Contents by integer indexes.
A
B
C
D

Get the index of the element with a key using the IndexOfKey() method

using System;
using System.Collections;
class MainClass
{
  public static void Main()
  {
    SortedList mySortedList = new SortedList();
    mySortedList.Add("NY", "New York");
    mySortedList.Add("FL", "Florida");
    mySortedList.Add("AL", "Alabama");
    mySortedList.Add("WY", "Wyoming");
    mySortedList.Add("CA", "California");
    foreach (string myKey in mySortedList.Keys)
    {
      Console.WriteLine("myKey = " + myKey);
    }
    foreach(string myValue in mySortedList.Values)
    {
      Console.WriteLine("myValue = " + myValue);
    }
    
    int myIndex = mySortedList.IndexOfKey("NY");
    Console.WriteLine("The index of NY is " + myIndex);
  }
}

myKey = AL
myKey = CA
myKey = FL
myKey = NY
myKey = WY
myValue = Alabama
myValue = California
myValue = Florida
myValue = New York
myValue = Wyoming
The index of NY is 3

Get the index of the element with a value using the IndexOfValue() method

using System;
using System.Collections;
class MainClass
{
  public static void Main()
  {
    SortedList mySortedList = new SortedList();
    mySortedList.Add("NY", "New York");
    mySortedList.Add("FL", "Florida");
    mySortedList.Add("AL", "Alabama");
    mySortedList.Add("WY", "Wyoming");
    mySortedList.Add("CA", "California");
    foreach (string myKey in mySortedList.Keys)
    {
      Console.WriteLine("myKey = " + myKey);
    }
    foreach(string myValue in mySortedList.Values)
    {
      Console.WriteLine("myValue = " + myValue);
    }
    int myIndex = mySortedList.IndexOfValue("New York");
    Console.WriteLine("The index of New York is " + myIndex);
  }
}

myKey = AL
myKey = CA
myKey = FL
myKey = NY
myKey = WY
myValue = Alabama
myValue = California
myValue = Florida
myValue = New York
myValue = Wyoming
The index of New York is 3

Get the key at index 3 using the GetKey() method

using System;
using System.Collections;
class MainClass
{
  public static void Main()
  {
    SortedList mySortedList = new SortedList();
    mySortedList.Add("NY", "New York");
    mySortedList.Add("FL", "Florida");
    mySortedList.Add("AL", "Alabama");
    mySortedList.Add("WY", "Wyoming");
    mySortedList.Add("CA", "California");
    foreach (string myKey in mySortedList.Keys)
    {
      Console.WriteLine("myKey = " + myKey);
    }
    foreach(string myValue in mySortedList.Values)
    {
      Console.WriteLine("myValue = " + myValue);
    }
    
    string keyAtIndex3 = (string) mySortedList.GetKey(3);
    Console.WriteLine("The key at index 3 is " + keyAtIndex3);
  }
}

myKey = AL
myKey = CA
myKey = FL
myKey = NY
myKey = WY
myValue = Alabama
myValue = California
myValue = Florida
myValue = New York
myValue = Wyoming
The key at index 3 is NY

Get the key list using the GetKeyList() method

using System;
using System.Collections;
class MainClass
{
  public static void Main()
  {
    SortedList mySortedList = new SortedList();
    mySortedList.Add("NY", "New York");
    mySortedList.Add("FL", "Florida");
    mySortedList.Add("AL", "Alabama");
    mySortedList.Add("WY", "Wyoming");
    mySortedList.Add("CA", "California");
    foreach (string myKey in mySortedList.Keys)
    {
      Console.WriteLine("myKey = " + myKey);
    }
    foreach(string myValue in mySortedList.Values)
    {
      Console.WriteLine("myValue = " + myValue);
    }
    Console.WriteLine("Getting the key list");
    IList myKeyList = mySortedList.GetKeyList();
    foreach(string myKey in myKeyList)
    {
      Console.WriteLine("myKey = " + myKey);
    }
  }
}

myKey = AL
myKey = CA
myKey = FL
myKey = NY
myKey = WY
myValue = Alabama
myValue = California
myValue = Florida
myValue = New York
myValue = Wyoming
Getting the key list
myKey = AL
myKey = CA
myKey = FL
myKey = NY
myKey = WY

Get the value list using the GetValueList() method

using System;
using System.Collections;
class MainClass
{
  public static void Main()
  {
    SortedList mySortedList = new SortedList();
    mySortedList.Add("NY", "New York");
    mySortedList.Add("FL", "Florida");
    mySortedList.Add("AL", "Alabama");
    mySortedList.Add("WY", "Wyoming");
    mySortedList.Add("CA", "California");
    foreach (string myKey in mySortedList.Keys)
    {
      Console.WriteLine("myKey = " + myKey);
    }
    foreach(string myValue in mySortedList.Values)
    {
      Console.WriteLine("myValue = " + myValue);
    }
    Console.WriteLine("Getting the value list");
    IList myValueList = mySortedList.GetValueList();
    foreach(string myValue in myValueList)
    {
      Console.WriteLine("myValue = " + myValue);
    }
  }
}

myKey = AL
myKey = CA
myKey = FL
myKey = NY
myKey = WY
myValue = Alabama
myValue = California
myValue = Florida
myValue = New York
myValue = Wyoming
Getting the value list
myValue = Alabama
myValue = California
myValue = Florida
myValue = New York
myValue = Wyoming

Get value by key indexer

using System;
using System.Collections;
class MainClass
{
  public static void Main()
  {
    SortedList mySortedList = new SortedList();
    mySortedList.Add("NY", "New York");
    mySortedList.Add("FL", "Florida");
    mySortedList.Add("AL", "Alabama");
    mySortedList.Add("WY", "Wyoming");
    mySortedList.Add("CA", "California");
    string myState = (string) mySortedList["CA"];
    Console.WriteLine("myState = " + myState);
    // display the keys for mySortedList using the Keys property
    foreach (string myKey in mySortedList.Keys) {
      Console.WriteLine("myKey = " + myKey);
    }
    // display the values for mySortedList using the Values property
    foreach(string myValue in mySortedList.Values) {
      Console.WriteLine("myValue = " + myValue);
    }
  }
}

myState = California
myKey = AL
myKey = CA
myKey = FL
myKey = NY
myKey = WY
myValue = Alabama
myValue = California
myValue = Florida
myValue = New York
myValue = Wyoming

Show integer indexes of entries

using System; 
using System.Collections; 
 
class MainClass { 
  public static void Main() { 
    SortedList sl = new SortedList(); 
     
    sl.Add("a", "1"); 
    sl.Add("b", "2"); 
    sl.Add("c", "3"); 
    sl.Add("d", "4"); 
 
    Console.WriteLine(); 
 
    // Show integer indexes of entries. 
    Console.WriteLine("Integer indexes of entries."); 
    foreach(string str in sl.Keys) 
      Console.WriteLine(str + ": " + sl.IndexOfKey(str)); 
  } 
}

Integer indexes of entries.
a: 0
b: 1
c: 2
d: 3

Use the ContainsValue() method to check if mySortedList contains a value

using System;
using System.Collections;
class MainClass
{
  public static void Main()
  {
    SortedList mySortedList = new SortedList();
    mySortedList.Add("NY", "New York");
    mySortedList.Add("FL", "Florida");
    mySortedList.Add("AL", "Alabama");
    mySortedList.Add("WY", "Wyoming");
    mySortedList.Add("CA", "California");
    foreach (string myKey in mySortedList.Keys)
    {
      Console.WriteLine("myKey = " + myKey);
    }
    foreach(string myValue in mySortedList.Values)
    {
      Console.WriteLine("myValue = " + myValue);
    }
    
    if (mySortedList.ContainsValue("Florida"))
    {
      Console.WriteLine("mySortedList contains the value Florida");
    }
  }
}

myKey = AL
myKey = CA
myKey = FL
myKey = NY
myKey = WY
myValue = Alabama
myValue = California
myValue = Florida
myValue = New York
myValue = Wyoming
mySortedList contains the value Florida

Use the Remove() method to remove a key from SortedList

using System;
using System.Collections;
class MainClass
{
  public static void Main()
  {
    SortedList mySortedList = new SortedList();
    mySortedList.Add("NY", "New York");
    mySortedList.Add("FL", "Florida");
    mySortedList.Add("AL", "Alabama");
    mySortedList.Add("WY", "Wyoming");
    mySortedList.Add("CA", "California");
    foreach (string myKey in mySortedList.Keys)
    {
      Console.WriteLine("myKey = " + myKey);
    }
    foreach(string myValue in mySortedList.Values)
    {
      Console.WriteLine("myValue = " + myValue);
    }
    
    Console.WriteLine("Removing FL from mySortedList");
    mySortedList.Remove("FL");
  }
}

myKey = AL
myKey = CA
myKey = FL
myKey = NY
myKey = WY
myValue = Alabama
myValue = California
myValue = Florida
myValue = New York
myValue = Wyoming
Removing FL from mySortedList