How would I go about creating an if/else statement, based on if a registry value exists?
Here's the code I have already for checking for a registry key. I'm looking for it to check for the registry value, of this key.
{
Microsoft.Win32.RegistryKey subKey = Microsoft.Win32.Registry.LocalMachine.OpenSubKey("SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Run");
if (subKey != null)
{
MessageBox.Show("Registry Key exists");
}
else
{
MessageBox.Show("Registry Key does not exist");
}
}
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| TheTrueFace Sunday, September 27, 2009 8:58 AM |
Just try to read the value:
using System;
using Microsoft.Win32;
class Program {
static void Main(string[] args) {
RegistryKey key = Registry.LocalMachine.OpenSubKey("Software\\Nobugz");
if (key.GetValue("test", null) == null)
Console.WriteLine("value does not exist");
Console.ReadLine();
}
}
Hans Passant.- Marked As Answer byTheTrueFace Sunday, September 27, 2009 10:37 PM
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| nobugz Sunday, September 27, 2009 12:22 PM |
The only way I can see that GetValue() doesn't work is when you actually created a "Registry sample" key instead of a value. Right-click the Run key and select New + String Value, not New + Key.
Hans Passant.- Marked As Answer byTheTrueFace Sunday, September 27, 2009 10:37 PM
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| nobugz Sunday, September 27, 2009 8:11 PM |
You misspelled "Registery". Don't delete the Run key, that corrupts your Windows installation. You got lucky, UAC protected you.
Hans Passant.- Marked As Answer byTheTrueFace Sunday, September 27, 2009 10:37 PM
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| nobugz Sunday, September 27, 2009 8:33 PM |
Here is the code you can get values of this key.
RegistryKey subKey = Registry.LocalMachine.OpenSubKey("SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Run");
if (subKey != null)
{
MessageBox.Show("Registry Key exists");
MessageBox.Show(subKey.ValueCount.ToString());
foreach (string s in subKey.GetValueNames())
{
MessageBox.Show(s + ":" + subKey.GetValue(s));
}
}
else
{
MessageBox.Show("Registry Key does not exist");
}
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| Tamer Oz Sunday, September 27, 2009 9:24 AM |
if (subKeyvalue == "RegistrySample")
{
}
I wanted something along the lines of that, the code will execute, if the specified registry value exists. |
| TheTrueFace Sunday, September 27, 2009 10:19 AM |
Just try to read the value:
using System;
using Microsoft.Win32;
class Program {
static void Main(string[] args) {
RegistryKey key = Registry.LocalMachine.OpenSubKey("Software\\Nobugz");
if (key.GetValue("test", null) == null)
Console.WriteLine("value does not exist");
Console.ReadLine();
}
}
Hans Passant.- Marked As Answer byTheTrueFace Sunday, September 27, 2009 10:37 PM
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| nobugz Sunday, September 27, 2009 12:22 PM |
RegistryKey key = Registry.LocalMachine.OpenSubKey("SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Run");
if (key.GetValue("Registry Sample", null) == null)
{
MessageBox.Show("Registry Key exists");
}
else
{
MessageBox.Show("Registry Key does not exist");
}
Why does this not work for me? weather the key is deleted or not, it still says the registry key exists. |
| TheTrueFace Sunday, September 27, 2009 7:19 PM |
You've got the test backwards. Make sure you see the difference between keys and values. I assume you didn't delete the Run key.
Hans Passant. |
| nobugz Sunday, September 27, 2009 8:02 PM |
I actually don't delete the runkey, just it's value.
Which is why I simply need to read the value.
I need to read my software value of Registry Sample.
I do get the difference, sorry if those message boxes are confusing. |
| TheTrueFace Sunday, September 27, 2009 8:05 PM |
The only way I can see that GetValue() doesn't work is when you actually created a "Registry sample" key instead of a value. Right-click the Run key and select New + String Value, not New + Key.
Hans Passant.- Marked As Answer byTheTrueFace Sunday, September 27, 2009 10:37 PM
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| nobugz Sunday, September 27, 2009 8:11 PM |
On second thought, if you could tell me how I could delete that sub key, I guess that would work just fine.
RegistryKey reg = Registry.LocalMachine.OpenSubKey("SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Run", true);
reg.DeleteValue("Registery Sample");
reg.DeleteSubKey("SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Run");
That errors and says the sub key doesnt exist when I try it.
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| TheTrueFace Sunday, September 27, 2009 8:14 PM |
You misspelled "Registery". Don't delete the Run key, that corrupts your Windows installation. You got lucky, UAC protected you.
Hans Passant.- Marked As Answer byTheTrueFace Sunday, September 27, 2009 10:37 PM
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| nobugz Sunday, September 27, 2009 8:33 PM |
Hm. what do I delete to get rid of the registry then? |
| TheTrueFace Sunday, September 27, 2009 8:34 PM |
Is there any way for me to just read the value Registry Sample from that key?............ |
| TheTrueFace Sunday, September 27, 2009 8:36 PM |
Not quite sure how you missed GetValue(). What on Earth are you doing? Pop a beer, kick the dog, kiss the girl and get some sleep. It will all work tomorrow morning.
Hans Passant. |
| nobugz Sunday, September 27, 2009 9:35 PM |
Here's the code i was suggested to use to create an if statement based on IF the registry value existed.
{
RegistryKey key = Registry.LocalMachine.OpenSubKey("SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Run");
if (key.GetValue("Registry Sample", null) == null)
{
MessageBox.Show("Registry Value exists");
}
else
{
MessageBox.Show("Registry Value does not exist");
}
}
Here's my code for writing the value
if (this.startwithwindows.CheckState == CheckState.Checked)
{
RegistryKey reg = Registry.LocalMachine.OpenSubKey("SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Run", true);
reg.SetValue("Registery Sample", Application.ExecutablePath.ToString());
MessageBox.Show("Load with windows has been enabled.");
}
else
{
RegistryKey reg = Registry.LocalMachine.OpenSubKey("SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Run", true);
reg.DeleteValue("Registery Sample");
}
I can go to sleep after I'm done with this... fotunately...
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| TheTrueFace Sunday, September 27, 2009 9:57 PM |
Figured it out, thanks for all your help! |
| TheTrueFace Sunday, September 27, 2009 10:37 PM |
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