RegistryValueKind Enumeration
Assembly: mscorlib (in mscorlib.dll)
| Member name | Description | |
|---|---|---|
![]() | Binary | Specifies binary data in any form. This value is equivalent to the Win32 API registry data type REG_BINARY. |
![]() | DWord | Specifies a 32-bit binary number. This value is equivalent to the Win32 API registry data type REG_DWORD. |
![]() | ExpandString | Specifies a null-terminated string that contains unexpanded references to environment variables, such as %PATH%, that are expanded when the value is retrieved. This value is equivalent to the Win32 API registry data type REG_EXPAND_SZ. |
![]() | MultiString | Specifies an array of null-terminated strings, terminated by two null characters. This value is equivalent to the Win32 API registry data type REG_MULTI_SZ. |
![]() | QWord | Specifies a 64-bit binary number. This value is equivalent to the Win32 API registry data type REG_QWORD. |
![]() | String | Specifies a null-terminated string. This value is equivalent to the Win32 API registry data type REG_SZ. |
![]() | Unknown | Indicates an unsupported registry data type. For example, the Microsoft Win32 API registry data type REG_RESOURCE_LIST is unsupported. Use this value to specify that the SetValue method should determine the appropriate registry data type when storing a name/value pair. |
The RegistryValueKind enumeration defines the set of supported registry data types and the value that is used for unsupported types (Unknown).
Use the RegistryKey.GetValueKind method to determine the data type of a registry key value before retrieving the value. When you set a registry key value, use the SetValue method to specify the registry data type explicitly.
The following code example creates a registry key and sets several values for that key, using RegistryValueKind to specify the registry data types. The example then uses RegistryKey.GetValueKind to check the registry data types, in order to retrieve the values and display them.
Imports System Imports Microsoft.Win32 Imports Microsoft.VisualBasic Public Class Example Public Shared Sub Main() ' Delete and recreate the test key. Registry.CurrentUser.DeleteSubKey("RegistryValueKindExample", False) Dim rk As RegistryKey = Registry.CurrentUser.CreateSubKey("RegistryValueKindExample") ' Create name/value pairs. ' This overload supports QWord (long) values. rk.SetValue("QuadWordValue", 42, RegistryValueKind.QWord) ' The following SetValue calls have the same effect as using the ' SetValue overload that does not specify RegistryValueKind. ' rk.SetValue("DWordValue", 42, RegistryValueKind.DWord) rk.SetValue("MultipleStringValue", New String() {"One", "Two", "Three"}, RegistryValueKind.MultiString) rk.SetValue("BinaryValue", New Byte() {10, 43, 44, 45, 14, 255}, RegistryValueKind.Binary) rk.SetValue("StringValue", "The path is %PATH%", RegistryValueKind.String) ' This overload supports setting expandable string values. Compare ' the output from this value with the previous string value. rk.SetValue("ExpandedStringValue", "The path is %PATH%", RegistryValueKind.ExpandString) ' Display all name/value pairs stored in the test key, with each ' registry data type in parentheses. ' Dim valueNames As String() = rk.GetValueNames() Dim s As String For Each s In valueNames Dim rvk As RegistryValueKind = rk.GetValueKind(s) Select Case rvk Case RegistryValueKind.MultiString Dim values As String() = CType(rk.GetValue(s), String()) Console.Write(vbCrLf & " {0} ({1}) =", s, rvk) For i As Integer = 0 To values.Length - 1 If i <> 0 Then Console.Write(",") Console.Write(" ""{0}""", values(i)) Next i Console.WriteLine() Case RegistryValueKind.Binary Dim bytes As Byte() = CType(rk.GetValue(s), Byte()) Console.Write(vbCrLf & " {0} ({1}) =", s, rvk) For i As Integer = 0 To bytes.Length - 1 ' Display each byte as two hexadecimal digits. Console.Write(" {0:X2}", bytes(i)) Next i Console.WriteLine() Case Else Console.WriteLine(vbCrLf & " {0} ({1}) = {2}", s, rvk, rk.GetValue(s)) End Select Next s End Sub 'Main End Class 'Example ' 'This code example produces the following output (some output is omitted): ' ' QuadWordValue (QWord) = 42 ' ' DWordValue (DWord) = 42 ' ' MultipleStringValue (MultiString) = "One", "Two", "Three" ' ' BinaryValue (Binary) = 0A 2B 2C 2D 0E FF ' ' StringValue (String) = The path is %PATH% ' ' ExpandedStringValue (ExpandString) = The path is C:\Program Files\Microsoft.NET\SDK\v2.0\Bin; ' [***The remainder of this output is omitted.***]
import System.*;
import Microsoft.Win32.*;
public class Example
{
public static void main(String[] args)
{
// Delete and recreate the test key.
Registry.CurrentUser.DeleteSubKey("RegistryValueKindExample", false);
RegistryKey rk = Registry.CurrentUser.CreateSubKey(
"RegistryValueKindExample");
// Create name/value pairs.
// This overload supports QWord (long) values.
rk.SetValue("QuadWordValue", (Int32)42, RegistryValueKind.QWord);
// The following SetValue calls have the same effect as using the
// SetValue overload that does not specify RegistryValueKind.
//
rk.SetValue("DWordValue", (Int32)42, RegistryValueKind.DWord);
rk.SetValue("MultipleStringValue", new String[] { "One", "Two",
"Three" }, RegistryValueKind.MultiString);
rk.SetValue("BinaryValue", new ubyte[] { 10, 43, 44, 45, 14, 255 },
RegistryValueKind.Binary);
rk.SetValue("StringValue", "The path is %PATH%",
RegistryValueKind.String);
// This overload supports setting expandable string values. Compare
// the output from this value with the previous string value.
rk.SetValue("ExpandedStringValue", "The path is %PATH%",
RegistryValueKind.ExpandString);
// Display all name/value pairs stored in the test key, with each
// registry data type in parentheses.
//
String valueNames[] = rk.GetValueNames();
for (int iCtr1 = 0; iCtr1 < valueNames.get_Length(); iCtr1++) {
String s = valueNames [iCtr1];
RegistryValueKind rvk = rk.GetValueKind(s);
switch (rvk) {
case RegistryValueKind.MultiString:
String values[] = (String[])(rk.GetValue(s));
Console.Write("\r\n {0} ({1}) =", s, rvk);
for (int i = 0; i < values.get_Length(); i++) {
if (i != 0) Console.Write(",");
Console.Write(" \"{0}\"", values.get_Item(i));
}
Console.WriteLine();
break;
case RegistryValueKind.Binary:
ubyte bytes[] = (ubyte[])(rk.GetValue(s));
Console.Write("\r\n {0} ({1}) =", s, rvk);
for (int i = 0; i < bytes.get_Length(); i++) {
// Display each byte as two hexadecimal digits.
Console.Write(" {0:X2}", bytes.get_Item(i));
}
Console.WriteLine();
break;
default:
Console.WriteLine("\r\n {0} ({1}) = {2}", s, rvk,
rk.GetValue(s));
break;
}
}
} //main
} //Example
/*
This code example produces the following output:
QuadWordValue (QWord) = 42
DWordValue (DWord) = 42
MultipleStringValue (MultiString) =, "One", "Two", "Three"
BinaryValue (Binary) = 0A 2B 2C 2D 0E FF
StringValue (String) = The path is %PATH%
ExpandedStringValue (ExpandString) = The path is C:\Program Files\Microsoft.NET\SDK\v2.0\Bin;
[***The remainder of this output is omitted.***]
*/
Windows 98, Windows Server 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
The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.