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More On Arrays and Collections 11

 

 

What we have in this page?

 

Other SortedList Operations     Other SortedList Operations   There are many more operations can be done using Sorted List. The following Tables list the members exposed by the SortedList type that include constructors, properties, methods and interface.   Public Constructors Symbol Name Description SortedList Overloaded. Initializes a new instance of the SortedList class.   Table 6   Public Properties Symbol Name Description Capacity Gets or sets the capacity of the SortedList. Count Gets the number of elements contained in the SortedList. IsFixedSize Gets a value indicating whether the SortedList has a fixed size. IsReadOnly Gets a value indicating whether the SortedList is read-only. IsSynchronized Gets a value indicating whether access to the SortedList is synchronized (thread safe). Item Gets and sets the value associated with a specific key in the SortedList. Keys Gets the keys in the SortedList. SyncRoot Gets an object that can be used to synchronize access to the SortedList. Values Gets the values in the SortedList.   Table 7

 

 

 

 

 

 

 

Note: You may find that in C++ .Net the dot (.) is replaced by scope operator (::). The following example shows how to add elements to the SortedList.

// SortedList.cpp : main project file.

#include "stdafx.h"

 

using namespace System;

using namespace System::Collections;

 

void PrintKeysAndValues(SortedList^ myList)

{

   Console::WriteLine("\t-KEY-\t-VALUE-");

   for (int i = 0; i < myList->Count; i++)

   {

      Console::WriteLine("\t{0}:\t{1}", myList->GetKey(i), myList->GetByIndex(i));

   }

   Console::WriteLine();

}

 

int main(array<System::String ^> ^args)

{

   // Creates and initializes a new SortedList.

   SortedList^ mySL = gcnew SortedList;

   mySL->Add("one", "The");

   mySL->Add("two", "quick");

   mySL->Add("three", "and");

   mySL->Add("four", "dirty");

   mySL->Add("five", "method");

   // Displays the SortedList.

   Console::WriteLine("The SortedList contains:");

   PrintKeysAndValues(mySL);

   return 0;

}

 

Output:

 

 

 

 

 

The following example shows how to remove elements from the SortedList.

// SortedList.cpp : main project file.

#include "stdafx.h"

 

using namespace System;

using namespace System::Collections;

 

void PrintKeysAndValues(SortedList^ myList)

{

  Console::WriteLine("\t-KEY-\t-VALUE-");

  for (int i = 0; i < myList->Count; i++)

  {

     Console::WriteLine("\t{0}:\t{1}", myList->GetKey(i), myList->GetByIndex(i));

  }

  Console::WriteLine();

}

 

int main(array<System::String ^> ^args)

{

      // Creates and initializes a new SortedList.

      SortedList^ mySL = gcnew SortedList;

      mySL->Add("3c", "dog");

      mySL->Add("2c", "over");

      mySL->Add("1c", "brown");

      mySL->Add("1a", "The");

      mySL->Add("1b", "quick");

      mySL->Add("3a", "and");

      mySL->Add("3b", "dirty");

      mySL->Add("2a", "learning");

      mySL->Add("2b", "method");

      // Displays the SortedList.

      Console::WriteLine("The SortedList initially contains:");

      PrintKeysAndValues(mySL);

      // Removes the element with the key "3b".

      mySL->Remove("3b");

      // Displays the current state of the SortedList.

      Console::WriteLine("After removing \"dirty\":");

      PrintKeysAndValues(mySL);

      // Removes the element at index 5.

      mySL->RemoveAt(5);

      // Displays the current state of the SortedList.

      Console::WriteLine("After removing the element at index 5:");

      PrintKeysAndValues(mySL);

      return 0;

}

 

Output:

 

The following example shows how to determine whether the SortedList contains a specific element.

// SortedList.cpp : main project file.

#include "stdafx.h"

 

using namespace System;

using namespace System::Collections;

void PrintIndexAndKeysAndValues(SortedList^ myList)

{

   Console::WriteLine("\t-INDEX-\t-KEY-\t-VALUE-");

   for (int i = 0; i < myList->Count; i++)

   {

     Console::WriteLine("\t[{0}]:\t{1}\t{2}", i, myList->GetKey(i), myList->GetByIndex(i));

   }

   Console::WriteLine();

}

 

int main(array<System::String ^> ^args)

{

   // Creates and initializes a new SortedList.

   SortedList^ mySL = gcnew SortedList;

   mySL->Add(2, "two");

   mySL->Add(4, "four");

   mySL->Add(1, "one");

   mySL->Add(3, "three");

   mySL->Add((int^)0, "zero");

   // Displays the values of the SortedList.

   Console::WriteLine("The SortedList contains:" );

   PrintIndexAndKeysAndValues(mySL);

   // Searches for a specific key.

   int myKey = 2;

   Console::WriteLine("The key \"{0}\" is {1}.", myKey, mySL->ContainsKey(myKey) ? (String^)"in the SortedList":"NOT in the SortedList");

   myKey = 6;

   Console::WriteLine("The key \"{0}\" is {1}.", myKey, mySL->ContainsKey(myKey) ? (String^)"in the SortedList":"NOT in the SortedList");

   // Searches for a specific value.

   String^ myValue = "three";

   Console::WriteLine("The value \"{0}\" is {1}.", myValue, mySL->ContainsValue(myValue) ? (String^)"in the SortedList":"NOT in the SortedList");

   myValue = "nine";

   Console::WriteLine("The value \"{0}\" is {1}.", myValue, mySL->ContainsValue(myValue) ? (String^)"in the SortedList":"NOT in the SortedList");

   return 0;

}

 

Output:

 

 

Part 1 | Part 2 | part 3 | Part 4 | Part 5 | Part 6

 

 

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