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StringDictionary::Count Property
.NET Framework (current version)
Gets the number of key/value pairs in the StringDictionary.
Assembly: System (in System.dll)
Property Value
Type: System::Int32The number of key/value pairs in the StringDictionary.
Retrieving the value of this property is an O(1) operation.
The following code example enumerates the elements of a StringDictionary.
#using <System.dll> using namespace System; using namespace System::Collections; using namespace System::Collections::Specialized; void PrintKeysAndValues1( StringDictionary^ myCol ); void PrintKeysAndValues2( StringDictionary^ myCol ); void PrintKeysAndValues3( StringDictionary^ myCol ); int main() { // Creates and initializes a new StringDictionary. StringDictionary^ myCol = gcnew StringDictionary; myCol->Add( "red", "rojo" ); myCol->Add( "green", "verde" ); myCol->Add( "blue", "azul" ); // Display the contents of the collection using for each. This is the preferred method. Console::WriteLine( "Displays the elements using for each:" ); PrintKeysAndValues1( myCol ); // Display the contents of the collection using the enumerator. Console::WriteLine( "Displays the elements using the IEnumerator:" ); PrintKeysAndValues2( myCol ); // Display the contents of the collection using the Keys, Values, Count, and Item properties. Console::WriteLine( "Displays the elements using the Keys, Values, Count, and Item properties:" ); PrintKeysAndValues3( myCol ); } // Uses the for each statement which hides the complexity of the enumerator. // NOTE: The for each statement is the preferred way of enumerating the contents of a collection. void PrintKeysAndValues1( StringDictionary^ myCol ) { Console::WriteLine( " KEY VALUE" ); for each ( DictionaryEntry^ de in myCol ) Console::WriteLine( " {0,-25} {1}", de->Key, de->Value ); Console::WriteLine(); } // Uses the enumerator. void PrintKeysAndValues2( StringDictionary^ myCol ) { IEnumerator^ myEnumerator = myCol->GetEnumerator(); DictionaryEntry^ de; Console::WriteLine( " KEY VALUE" ); while ( myEnumerator->MoveNext() ) { de = (DictionaryEntry^)(myEnumerator->Current); Console::WriteLine( " {0,-25} {1}", de->Key, de->Value ); } Console::WriteLine(); } // Uses the Keys, Values, Count, and Item properties. void PrintKeysAndValues3( StringDictionary^ myCol ) { array<String^>^myKeys = gcnew array<String^>(myCol->Count); myCol->Keys->CopyTo( myKeys, 0 ); Console::WriteLine( " INDEX KEY VALUE" ); for ( int i = 0; i < myCol->Count; i++ ) Console::WriteLine( " {0,-5} {1,-25} {2}", i, myKeys[ i ], myCol[ myKeys[ i ] ] ); Console::WriteLine(); } /* This code produces the following output. Displays the elements using for each: KEY VALUE red rojo blue azul green verde Displays the elements using the IEnumerator: KEY VALUE red rojo blue azul green verde Displays the elements using the Keys, Values, Count, and Item properties: INDEX KEY VALUE 0 red rojo 1 blue azul 2 green verde */
Universal Windows Platform
Available since 10
.NET Framework
Available since 1.1
Available since 10
.NET Framework
Available since 1.1
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