RegistryKey.ValueCount Property

Reference

Definition

Namespace:: Microsoft.Win32

Assembly:: Microsoft.Win32.Registry.dll

Assembly:: mscorlib.dll

Package:: Microsoft.Win32.Registry v5.0.0

Source:: RegistryKey.cs

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Retrieves the count of values in the key.

public:
 property int ValueCount { int get(); };

public int ValueCount { get; }

member this.ValueCount : int

Public ReadOnly Property ValueCount As Integer

Property Value

Int32

The number of name/value pairs in the key.

Exceptions

SecurityException

The user does not have read permission for the key.

ObjectDisposedException

The RegistryKey being manipulated is closed (closed keys cannot be accessed).

UnauthorizedAccessException

The user does not have the necessary registry rights.

IOException

A system error occurred, for example the current key has been deleted.

Examples

This code example is part of a larger example provided for the RegistryKey class.

// Print the information from the Test9999 subkey.
Console::WriteLine( "There are {0} subkeys under Test9999.", test9999->SubKeyCount.ToString() );
array<String^>^subKeyNames = test9999->GetSubKeyNames();
for ( int i = 0; i < subKeyNames->Length; i++ )
{
   RegistryKey ^ tempKey = test9999->OpenSubKey( subKeyNames[ i ] );
   Console::WriteLine( "\nThere are {0} values for {1}.", tempKey->ValueCount.ToString(), tempKey->Name );
   array<String^>^valueNames = tempKey->GetValueNames();
   for ( int j = 0; j < valueNames->Length; j++ )
   {
      Console::WriteLine( "{0,-8}: {1}", valueNames[ j ], tempKey->GetValue( valueNames[ j ] )->ToString() );

   }
}

// Print the information from the Test9999 subkey.
Console.WriteLine("There are {0} subkeys under {1}.",
    test9999.SubKeyCount.ToString(), test9999.Name);
foreach(string subKeyName in test9999.GetSubKeyNames())
{
    using(RegistryKey
        tempKey = test9999.OpenSubKey(subKeyName))
    {
        Console.WriteLine("\nThere are {0} values for {1}.",
            tempKey.ValueCount.ToString(), tempKey.Name);
        foreach(string valueName in tempKey.GetValueNames())
        {
            Console.WriteLine("{0,-8}: {1}", valueName,
                tempKey.GetValue(valueName).ToString());
        }
    }
}

' Print the information from the Test9999 subkey.
Console.WriteLine("There are {0} subkeys under Test9999.", _
    test9999.SubKeyCount.ToString())
For Each subKeyName As String In test9999.GetSubKeyNames()
    Dim tempKey As RegistryKey = _
        test9999.OpenSubKey(subKeyName)
    Console.WriteLine(vbCrLf & "There are {0} values for " & _
        "{1}.", tempKey.ValueCount.ToString(), tempKey.Name)
    For Each valueName As String In tempKey.GetValueNames()
        Console.WriteLine("{0,-8}: {1}", valueName, _
            tempKey.GetValue(valueName).ToString())
    Next
Next

Remarks

Each registry key has a default value that is not associated with any name. This unnamed value can be set by using the SetValue method and specifying either null or the empty string ("") for name. If the default value has never been set, it does not contribute to the total count returned by the ValueCount property; once it has been set, however, it is always counted.

Applies to

Termék	Verziók
.NET	Core 1.0, Core 1.1, 6, 7, 8, 9, 10
.NET Framework	1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	2.0 (package-provided)
Windows Desktop	3.0, 3.1, 5

Megosztás a következőn keresztül: