PRB: RegistryKey.SetValue Method Stores Integer Values as Strings (317873)
The information in this article applies to:
- Microsoft .NET Framework Class Libraries 1.0
- Microsoft .NET Framework Class Libraries 1.1
This article was previously published under Q317873 IMPORTANT: This article contains information about modifying the registry.
Before you modify the registry, make sure to back it up and make sure that you
understand how to restore the registry if a problem occurs. For information
about how to back up, restore, and edit the registry, click the following
article number to view the article in the Microsoft Knowledge Base: 256986 Description of the Microsoft Windows Registry
SYMPTOMS The RegistryKey class in the Microsoft.Win32 namespace contains a method called SetValue. This method is used to store values in the system registry. The
first parameter in the SetValue method is a string that specifies the name of the value. The
second parameter is an object that contains the data to be stored. The object
type determines the registry type that will be used to store the value.
If the second parameter in SetValue is an Int32 value, the value is stored as an integer with the
REG_DWORD registry value type. However, if the second parameter is any other type of integer (such as Int16, UInt16, UInt32, and so on), the
value is stored as a string with the REG_SZ registry value type. RESOLUTION To store a non-Int32 integer value in the registry as a
REG_DWORD value, typecast the non-Int32 integer value to an Int32 value. Sample Code Before you edit the registry, read the "Add and Delete
Information in the Registry" and "Edit Registry Data" Help topics in
Regedt32.exe. Note that you should back up the registry before you edit it. If
you are running Microsoft Windows NT or Microsoft Windows 2000, you should also
update your Emergency Repair Disk (ERD). Use the following sample
Visual C# code to store a UInt32 value in the registry as a REG_DWORD value:
using System;
using Microsoft.Win32;
namespace MyNamespace {
class MyClass {
static void Main() {
UInt32 Val = UInt32.MaxValue;
RegistryKey MyKey =
Registry.CurrentUser.CreateSubKey("SOFTWARE\\MyApp");
MyKey.SetValue("MyVal_String", Val); // store as REG_SZ
MyKey.SetValue("MyVal_DWORD", (Int32) Val); // store as REG_DWORD
}
}
}
Use the following sample code for Visual C++:
#using <mscorlib.dll>
using namespace System;
using namespace Microsoft::Win32;
int main(void) {
UInt32 Val = UInt32::MaxValue;
RegistryKey *MyKey =
Registry::CurrentUser->CreateSubKey("SOFTWARE\\MyApp");
MyKey->SetValue(S"MyVal_String", __box(Val)); // store as REG_SZ
MyKey->SetValue(S"MyVal_DWORD", __box((Int32) Val)); // store as REG_DWORD
return 0;
}
STATUSThis
behavior is by design.
| Modification Type: | Major | Last Reviewed: | 10/22/2003 |
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| Keywords: | kbKernBase kbprb kbRegistry KB317873 kbAudDeveloper |
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