473,890 Members | 1,661 Online
Bytes | Software Development & Data Engineering Community
+ Post

Home Posts Topics Members FAQ

Visual Basic .NET 2008 registry GetValue exception - what wrong?

Hi!

Situation:

simple code read registry value (OpenSubKey -GetValue, as usual).
Requested value exists in registry and has type DWORD, read into the
variable UInt32, access rights granted.

When value's data is in interval &H0 - &H7FFFFFFF - it's works fine. When
value's data has "sign bit rised" (&HF0000000 - &HFFFFFFFF) - arithmetic
operation exception occurs (overflow).

Question is: is it a bug in Microsoft.Visua lBasic.dll or just stupid error
in registry usage?
WBR, Andre Klimov
Aladdin Knowledge Systems
Israel

PS
VS2008 Team Suite v9.0.21022.8 RTM (MSDN downloaded), standard installation

PPS
Sorry for simple question - I'm beginner and start use VB.NET only 3 days
before...
Mar 31 '08 #1
2 2381
It's actually a problem in the .NET framework When the registry key type is
REG_DWORD they use an Int32
in RegistryKey.Int ernalGetValue

So you need to use an Int32 (aka Integer), not an unsigned one.

"Andre Klimov" <Andre Kl****@discussi ons.microsoft.c omwrote in message
news:96******** *************** ***********@mic rosoft.com...
Hi!

Situation:

simple code read registry value (OpenSubKey -GetValue, as usual).
Requested value exists in registry and has type DWORD, read into the
variable UInt32, access rights granted.

When value's data is in interval &H0 - &H7FFFFFFF - it's works fine. When
value's data has "sign bit rised" (&HF0000000 - &HFFFFFFFF) - arithmetic
operation exception occurs (overflow).

Question is: is it a bug in Microsoft.Visua lBasic.dll or just stupid error
in registry usage?
WBR, Andre Klimov
Aladdin Knowledge Systems
Israel

PS
VS2008 Team Suite v9.0.21022.8 RTM (MSDN downloaded), standard
installation

PPS
Sorry for simple question - I'm beginner and start use VB.NET only 3 days
before...
Mar 31 '08 #2
Thank you very much!

WBR,

"Bill McCarthy" wrote:
It's actually a problem in the .NET framework When the registry key type is
REG_DWORD they use an Int32
in RegistryKey.Int ernalGetValue

So you need to use an Int32 (aka Integer), not an unsigned one.

Mar 31 '08 #3

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

3
17800
by: Bo | last post by:
I am using RegistryKey.GetValue() method to retrieve values from Windows Registry. I don't know how to read type REG_MULTI_SZ into a string array. I have tried string array = (string) RKey.GetValue(name); But it gave me "Invalid Cast Exception". Please provide C# sample code in your reply. Thank you.
6
17884
by: Bry | last post by:
I'm having problems writing (and reading) boolean data to the registry. // Write a boolean value to the registry // I've not included the obvious bits of code in these samples bool myBool = true; myRegistryKey.SetValue("SomeValue", myBool); This gives me a registry value with string data containing "True" // Read my boolean data back from the registry
3
1411
by: Martin | last post by:
Hi I am attempting to write a small application that will allow users to manage the AddressBar entries within Internet Explorer. The typed URLs in the AddressBar can be found at HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\TypedURLs and I have successfully managed to get this list via a Windows C# .NET app with the following code : public Form1()
11
2239
by: Larry Bird | last post by:
I'm trying to read a registry key using VB.Net. I have posted the code below that I'm using: Dim DBConnect As RegistryKey = Registry.CurrentUser.OpenSubKey _ ("Software\VB and VBA Program Settings\Mobile Control\SageQuestSetup") Dim AlertDB As String = CType(DBConnect.GetValue("ConnectionString"), String) Public AlertConnectionString As String = AlertDB
9
1281
by: Just Me | last post by:
Public Shared Function GetValue(ByVal keyName As String, ByVal valueName As String, Optional ByVal badKey As Object = "") As Object Dim UserKey As RegistryKey = Microsoft.Win32.Registry.CurrentUser.OpenSubKey("Software\JUNK\ keyName) If Not UserKey Is Nothing Then GetValue = CType(UserKey.GetValue(valueName, badKey), badKey.GetType())
3
1803
by: Aussie Rules | last post by:
Hi, I want to store some data in the registry, however I have not been able to do this, and think my logic maybe flawed. Firstly I try to open the registry and read in any existing values. Dim aKey As RegistryKey aKey = Registry.CurrentUser.OpenSubKey("software\myApplication") I then attempt to read in any existing values
6
1651
by: vovan | last post by:
I'm asking for help one more time. Below are 2 procedures. The first one is used in VB 2005 Windows Form project. It works fine on XP, Vista. Private Sub RegistryReadingTest() Try Dim f As New RegistryPermission(RegistryPermissionAccess.Read, _ "HKEY_LOCAL_MACHINE\SOFTWARE\SRS Enterprises\Coordinator\Settings") f.Demand()
2
2984
by: desertavataraz | last post by:
I am trying to save the background color of my main textbox so that if a user changes it, those changes will be automatically save and retreived when the user re-opens the application. The code builds fine, but throws and error, saying "specified cast is not valid". It appears that the registry only accepts string values, but attempting to convert to a string has the problem of getting it back to a color value. So far nothing I have tried has...
5
5088
Sl1ver
by: Sl1ver | last post by:
I have this piece of code public bool Write(string KeyName, object Value) { try { // Setting string subKey1 = "SOFTWARE\\QwixAssets"; RegistryKey rk = Registry.LocalMachine; RegistryKey sk1 = rk.CreateSubKey(subKey1);
0
9816
by: Hystou | last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it. First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
0
11218
Oralloy
by: Oralloy | last post by:
Hello folks, I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>". The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed. This is as boiled down as I can make it. Here is my compilation command: g++-12 -std=c++20 -Wnarrowing bit_field.cpp Here is the code in...
0
10802
jinu1996
by: jinu1996 | last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth. The Art of Business Website Design Your website is...
1
10910
by: Hystou | last post by:
Overview: Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
0
5837
by: TSSRALBI | last post by:
Hello I'm a network technician in training and I need your help. I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs. The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols. I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
0
6036
by: adsilva | last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
1
4667
by: 6302768590 | last post by:
Hai team i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
2
4260
muto222
by: muto222 | last post by:
How can i add a mobile payment intergratation into php mysql website.
3
3268
bsmnconsultancy
by: bsmnconsultancy | last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.