ConsoleKeyInfo.GetHashCode メソッド

.NET Framework クラス ライブラリ リファレンス

ConsoleKeyInfo.GetHashCode メソッド

メモ : このメソッドは、.NET Framework version 2.0 で新しく追加されたものです。

現在の ConsoleKeyInfo オブジェクトのハッシュ コードを返します。

名前空間: System
アセンブリ: mscorlib (mscorlib.dll 内)
構文

Visual Basic (宣言)

Public Overrides Function
 GetHashCode As Integer

Visual Basic (使用法)

Dim instance As ConsoleKeyInfo
Dim returnValue As Integer

returnValue = instance.GetHashCode

C#

public override int GetHashCode ()

C++

public:
virtual int GetHashCode () override

J#

public int GetHashCode ()

JScript

public override function GetHashCode () : int

戻り値
32 ビット符号付き整数ハッシュ コード。

解説

GetHashCode メソッドによって返される値は、2 つの ConsoleKeyInfo オブジェクトを区別するのに適していません。アプリケーションで一意のハッシュ コードが必要な場合は、独自のメソッドで GetHashCode メソッドをオーバーライドします。

使用例

GetHashCode メソッドのコード例を次に示します。

Visual Basic

' This example demonstrates the ConsoleKeyInfo.GetHashCode() method.
Imports System
Imports System.Text

Class Sample
    Public Shared Sub Main()
 
        Dim k1 As String
 = vbCrLf & "Enter a key ......... "
        Dim key1 As String
 = ""
        Dim hashCodeFmt As String
 = "The hash code for the {0} key is {1}."
        Dim prompt As String
 = "Press the escape key (ESC) to quit, " & _
                               "or any other key to continue."
        Dim cki1 As ConsoleKeyInfo
        Dim hashCode As Integer
 = 0
        
        '
        ' The Console.TreatControlCAsInput property prevents this example
 from
        ' ending if you press CTL+C, however all other operating system
 keys and 
        ' shortcuts, such as ALT+TAB or the Windows Logo key, are still
 in effect. 
        '
        Console.TreatControlCAsInput = True
        
        ' Request that the user enter two key presses. A key press and
 any 
        ' combination shift, CTRL, and ALT modifier keys is permitted.
        Do
            Console.Write(k1)
            cki1 = Console.ReadKey(False)
            Console.WriteLine()
            '
            key1 = KeyCombination(cki1)
            hashCode = cki1.GetHashCode()
            Console.WriteLine(hashCodeFmt, key1, hashCode)
            '
            Console.WriteLine(prompt)
            cki1 = Console.ReadKey(True)
        Loop While cki1.Key <> ConsoleKey.Escape
    
    End Sub 'Main
     ' Note: This example requires the Escape (Esc) key.
    
    ' The KeyCombination() method creates a string that specifies what
 
    ' key and what combination of shift, CTRL, and ALT modifier keys
 
    ' were pressed simultaneously.
    Protected Shared Function
 KeyCombination(ByVal sourceCki As ConsoleKeyInfo)
 As String 
        Dim sb As New StringBuilder()
        sb.Length = 0
        Dim keyCombo As String
        If sourceCki.Modifiers <> 0 Then
            If(sourceCki.Modifiers And ConsoleModifiers.Alt)
 <> 0 Then
                sb.Append("ALT+")
            End If
            If(sourceCki.Modifiers And ConsoleModifiers.Shift)
 <> 0 Then
                sb.Append("SHIFT+")
            End If
            If(sourceCki.Modifiers And ConsoleModifiers.Control)
 <> 0 Then
                sb.Append("CTL+")
            End If
        End If
        sb.Append(sourceCki.Key.ToString())
        keyCombo = sb.ToString()
        Return keyCombo
    
    End Function 'KeyCombination
End Class 'Sample

'
'This example produces results similar to the following output:
'
'Enter a key ......... a
'The hash code for the A key is 97.
'Press the escape key (ESC) to quit, or any other key to continue.
'
'Enter a key ......... S
'The hash code for the SHIFT+S key is 83.
'Press the escape key (ESC) to quit, or any other key to continue.
'
'Enter a key .........
'The hash code for the ALT+SHIFT+CTL+J key is 7.
'Press the escape key (ESC) to quit, or any other key to continue.
'

C#

// This example demonstrates the ConsoleKeyInfo.GetHashCode() method.

using System;
using System.Text;

class Sample 
{
    public static void Main()
 
    {
    string k1 = "\nEnter a key ......... ";
    string key1 = "";
    string hashCodeFmt = "The hash code for
 the {0} key is {1}.";
    string prompt = "Press the escape key (ESC) to quit,
 " + 
                    "or any other key to continue.";
    ConsoleKeyInfo cki1;
    int hashCode = 0;

//
// The Console.TreatControlCAsInput property prevents this example from
// ending if you press CTL+C, however all other operating system keys
 and 
// shortcuts, such as ALT+TAB or the Windows Logo key, are still in
 effect. 
//
    Console.TreatControlCAsInput = true;

// Request that the user enter two key presses. A key press and any
 
// combination shift, CTRL, and ALT modifier keys is permitted.
    do 
    {
        Console.Write(k1);
        cki1 = Console.ReadKey(false);
        Console.WriteLine();
//
        key1 = KeyCombination(cki1);
        hashCode = cki1.GetHashCode();
        Console.WriteLine(hashCodeFmt, key1, hashCode);
//
        Console.WriteLine(prompt);
        cki1 = Console.ReadKey(true);
    } while (cki1.Key != ConsoleKey.Escape);
// Note: This example requires the Escape (Esc) key.
    }

// The KeyCombination() method creates a string that specifies what
 
// key and what combination of shift, CTRL, and ALT modifier keys 
// were pressed simultaneously.

    protected static string
 KeyCombination(ConsoleKeyInfo sourceCki)
    {
    StringBuilder sb = new StringBuilder();
    sb.Length = 0;
    string keyCombo;
    if (sourceCki.Modifiers != 0)
        {
        if ((sourceCki.Modifiers & ConsoleModifiers.Alt) !=
 0)
            sb.Append("ALT+");
        if ((sourceCki.Modifiers & ConsoleModifiers.Shift)
 != 0)
            sb.Append("SHIFT+");
        if ((sourceCki.Modifiers & ConsoleModifiers.Control)
 != 0)
            sb.Append("CTL+");
        }
    sb.Append(sourceCki.Key.ToString());
    keyCombo = sb.ToString();
    return keyCombo;
    }
}

/*
This example produces results similar to the following output:

Enter a key ......... a
The hash code for the A key is 97.
Press the escape key (ESC) to quit, or any other key to continue.

Enter a key ......... S
The hash code for the SHIFT+S key is 83.
Press the escape key (ESC) to quit, or any other key to continue.

Enter a key .........
The hash code for the ALT+SHIFT+CTL+J key is 7.
Press the escape key (ESC) to quit, or any other key to continue.

*/

プラットフォーム

Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

開発プラットフォームの中には、.NET Framework によってサポートされていないバージョンがあります。サポートされているバージョンについては、「システム要件」を参照してください。

バージョン情報

.NET Framework
サポート対象 : 2.0

参照

関連項目
ConsoleKeyInfo 構造体
ConsoleKeyInfo メンバ
System 名前空間