HybridDictionary.Contains メソッド
アセンブリ: System (system.dll 内)
構文
Dim instance As HybridDictionary Dim key As Object Dim returnValue As Boolean returnValue = instance.Contains(key)
戻り値
指定したキーを持つエントリが HybridDictionary に格納されている場合は true。それ以外の場合は false。
解説
使用例
HybridDictionary の要素を検索する例を次に示します。
Imports System Imports System.Collections Imports System.Collections.Specialized Public Class SamplesHybridDictionary Public Shared Sub Main() ' Creates and initializes a new HybridDictionary. Dim myCol As New HybridDictionary() myCol.Add("Braeburn Apples", "1.49") myCol.Add("Fuji Apples", "1.29") myCol.Add("Gala Apples", "1.49") myCol.Add("Golden Delicious Apples", "1.29") myCol.Add("Granny Smith Apples", "0.89") myCol.Add("Red Delicious Apples", "0.99") myCol.Add("Plantain Bananas", "1.49") myCol.Add("Yellow Bananas", "0.79") myCol.Add("Strawberries", "3.33") myCol.Add("Cranberries", "5.98") myCol.Add("Navel Oranges", "1.29") myCol.Add("Grapes", "1.99") myCol.Add("Honeydew Melon", "0.59") myCol.Add("Seedless Watermelon", "0.49") myCol.Add("Pineapple", "1.49") myCol.Add("Nectarine", "1.99") myCol.Add("Plums", "1.69") myCol.Add("Peaches", "1.99") ' Displays the values in the HybridDictionary in three different ways. Console.WriteLine("Initial contents of the HybridDictionary:") PrintKeysAndValues(myCol) ' Searches for a key. If myCol.Contains("Kiwis") Then Console.WriteLine("The collection contains the key ""Kiwis"".") Else Console.WriteLine("The collection does not contain the key ""Kiwis"".") End If Console.WriteLine() End Sub 'Main Public Shared Sub PrintKeysAndValues(myCol As IDictionary) Console.WriteLine(" KEY VALUE") Dim de As DictionaryEntry For Each de In myCol Console.WriteLine(" {0,-25} {1}", de.Key, de.Value) Next de Console.WriteLine() End Sub 'PrintKeysAndValues End Class 'SamplesHybridDictionary 'This code produces the following output. ' 'Initial contents of the HybridDictionary: ' KEY VALUE ' Seedless Watermelon 0.49 ' Nectarine 1.99 ' Cranberries 5.98 ' Plantain Bananas 1.49 ' Honeydew Melon 0.59 ' Pineapple 1.49 ' Strawberries 3.33 ' Grapes 1.99 ' Braeburn Apples 1.49 ' Peaches 1.99 ' Red Delicious Apples 0.99 ' Golden Delicious Apples 1.29 ' Yellow Bananas 0.79 ' Granny Smith Apples 0.89 ' Gala Apples 1.49 ' Plums 1.69 ' Navel Oranges 1.29 ' Fuji Apples 1.29 ' 'The collection does not contain the key "Kiwis".
using System; using System.Collections; using System.Collections.Specialized; public class SamplesHybridDictionary { public static void Main() { // Creates and initializes a new HybridDictionary. HybridDictionary myCol = new HybridDictionary(); myCol.Add( "Braeburn Apples", "1.49" ); myCol.Add( "Fuji Apples", "1.29" ); myCol.Add( "Gala Apples", "1.49" ); myCol.Add( "Golden Delicious Apples", "1.29" ); myCol.Add( "Granny Smith Apples", "0.89" ); myCol.Add( "Red Delicious Apples", "0.99" ); myCol.Add( "Plantain Bananas", "1.49" ); myCol.Add( "Yellow Bananas", "0.79" ); myCol.Add( "Strawberries", "3.33" ); myCol.Add( "Cranberries", "5.98" ); myCol.Add( "Navel Oranges", "1.29" ); myCol.Add( "Grapes", "1.99" ); myCol.Add( "Honeydew Melon", "0.59" ); myCol.Add( "Seedless Watermelon", "0.49" ); myCol.Add( "Pineapple", "1.49" ); myCol.Add( "Nectarine", "1.99" ); myCol.Add( "Plums", "1.69" ); myCol.Add( "Peaches", "1.99" ); // Displays the values in the HybridDictionary in three different ways. Console.WriteLine( "Initial contents of the HybridDictionary:" ); PrintKeysAndValues( myCol ); // Searches for a key. if ( myCol.Contains( "Kiwis" ) ) Console.WriteLine( "The collection contains the key \"Kiwis\"." ); else Console.WriteLine( "The collection does not contain the key \"Kiwis\"." ); Console.WriteLine(); } public static void PrintKeysAndValues( IDictionary myCol ) { Console.WriteLine( " KEY VALUE" ); foreach ( DictionaryEntry de in myCol ) Console.WriteLine( " {0,-25} {1}", de.Key, de.Value ); Console.WriteLine(); } } /* This code produces the following output. Initial contents of the HybridDictionary: KEY VALUE Seedless Watermelon 0.49 Nectarine 1.99 Cranberries 5.98 Plantain Bananas 1.49 Honeydew Melon 0.59 Pineapple 1.49 Strawberries 3.33 Grapes 1.99 Braeburn Apples 1.49 Peaches 1.99 Red Delicious Apples 0.99 Golden Delicious Apples 1.29 Yellow Bananas 0.79 Granny Smith Apples 0.89 Gala Apples 1.49 Plums 1.69 Navel Oranges 1.29 Fuji Apples 1.29 The collection does not contain the key "Kiwis". */
#using <System.dll> using namespace System; using namespace System::Collections; using namespace System::Collections::Specialized; void PrintKeysAndValues( IDictionary^ myCol ) { Console::WriteLine( " KEY VALUE" ); IEnumerator^ myEnum = myCol->GetEnumerator(); while ( myEnum->MoveNext() ) { DictionaryEntry de = safe_cast<DictionaryEntry>(myEnum->Current); Console::WriteLine( " {0,-25} {1}", de.Key, de.Value ); } Console::WriteLine(); } int main() { // Creates and initializes a new HybridDictionary. HybridDictionary^ myCol = gcnew HybridDictionary; myCol->Add( "Braeburn Apples", "1.49" ); myCol->Add( "Fuji Apples", "1.29" ); myCol->Add( "Gala Apples", "1.49" ); myCol->Add( "Golden Delicious Apples", "1.29" ); myCol->Add( "Granny Smith Apples", "0.89" ); myCol->Add( "Red Delicious Apples", "0.99" ); myCol->Add( "Plantain Bananas", "1.49" ); myCol->Add( "Yellow Bananas", "0.79" ); myCol->Add( "Strawberries", "3.33" ); myCol->Add( "Cranberries", "5.98" ); myCol->Add( "Navel Oranges", "1.29" ); myCol->Add( "Grapes", "1.99" ); myCol->Add( "Honeydew Melon", "0.59" ); myCol->Add( "Seedless Watermelon", "0.49" ); myCol->Add( "Pineapple", "1.49" ); myCol->Add( "Nectarine", "1.99" ); myCol->Add( "Plums", "1.69" ); myCol->Add( "Peaches", "1.99" ); // Displays the values in the HybridDictionary in three different ways. Console::WriteLine( "Initial contents of the HybridDictionary:" ); PrintKeysAndValues( myCol ); // Searches for a key. if ( myCol->Contains( "Kiwis" ) ) Console::WriteLine( "The collection contains the key \"Kiwis\"." ); else Console::WriteLine( "The collection does not contain the key \"Kiwis\"." ); Console::WriteLine(); } /* This code produces the following output. Initial contents of the HybridDictionary: KEY VALUE Seedless Watermelon 0.49 Nectarine 1.99 Cranberries 5.98 Plantain Bananas 1.49 Honeydew Melon 0.59 Pineapple 1.49 Strawberries 3.33 Grapes 1.99 Braeburn Apples 1.49 Peaches 1.99 Red Delicious Apples 0.99 Golden Delicious Apples 1.29 Yellow Bananas 0.79 Granny Smith Apples 0.89 Gala Apples 1.49 Plums 1.69 Navel Oranges 1.29 Fuji Apples 1.29 The collection does not contain the key "Kiwis". */
import System.*; import System.Collections.*; import System.Collections.Specialized.*; public class SamplesHybridDictionary { public static void main(String[] args) { // Creates and initializes a new HybridDictionary. HybridDictionary myCol = new HybridDictionary(); myCol.Add("Braeburn Apples", "1.49"); myCol.Add("Fuji Apples", "1.29"); myCol.Add("Gala Apples", "1.49"); myCol.Add("Golden Delicious Apples", "1.29"); myCol.Add("Granny Smith Apples", "0.89"); myCol.Add("Red Delicious Apples", "0.99"); myCol.Add("Plantain Bananas", "1.49"); myCol.Add("Yellow Bananas", "0.79"); myCol.Add("Strawberries", "3.33"); myCol.Add("Cranberries", "5.98"); myCol.Add("Navel Oranges", "1.29"); myCol.Add("Grapes", "1.99"); myCol.Add("Honeydew Melon", "0.59"); myCol.Add("Seedless Watermelon", "0.49"); myCol.Add("Pineapple", "1.49"); myCol.Add("Nectarine", "1.99"); myCol.Add("Plums", "1.69"); myCol.Add("Peaches", "1.99"); // Displays the values in the HybridDictionary in three different ways. Console.WriteLine("Initial contents of the HybridDictionary:"); PrintKeysAndValues(myCol); // Searches for a key. if (myCol.Contains("Kiwis")) { Console.WriteLine("The collection contains the key \"Kiwis\"."); } else { Console.WriteLine("The collection does not contain the key " + "\"Kiwis\"."); } Console.WriteLine(); }//main public static void PrintKeysAndValues(IDictionary myCol) { IEnumerator objEnum = myCol.GetEnumerator(); Console.WriteLine(" KEY VALUE"); while (objEnum.MoveNext()) { DictionaryEntry de = (DictionaryEntry)objEnum.get_Current(); Console.WriteLine(" {0,-25} {1}", de.get_Key(), de.get_Value()); } Console.WriteLine(); } //PrintKeysAndValues } //SamplesHybridDictionary /* Initial contents of the HybridDictionary: KEY VALUE Strawberries 3.33 Yellow Bananas 0.79 Cranberries 5.98 Grapes 1.99 Granny Smith Apples 0.89 Seedless Watermelon 0.49 Honeydew Melon 0.59 Red Delicious Apples 0.99 Navel Oranges 1.29 Fuji Apples 1.29 Plantain Bananas 1.49 Gala Apples 1.49 Pineapple 1.49 Plums 1.69 Braeburn Apples 1.49 Peaches 1.99 Golden Delicious Apples 1.29 Nectarine 1.99 The collection does not contain the key "Kiwis". */
Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
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参照
- HybridDictionary.Contains メソッドのページへのリンク