C# Discussion Boards - CodeProject

5-Jun-09 7:19

WHY DOEST THIS WORK?

RegistryKey RegKeyWrite = Registry.LocalMachine.OpenSubKey("SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\SystemRestore");
RegKeyWrite.OpenSubKey("DiskPercent");
RegKeyWrite.("DiskPercent",0);
RegKeyWrite.Close();

EliottA5-Jun-09 7:27

EliottA

5-Jun-09 7:27

Maybe you don't have permission to edit the registry?

What is the exception being thrown?

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rick05565-Jun-09 13:22

5-Jun-09 13:22

Thank you for your Reply,
No exception is being thrown just trying to set a value to the registry
Guess I'll have to figure out how to give my program permission to set values in the registry
Regards
Rick

I Believe In GOD5-Jun-09 7:29

I Believe In GOD

5-Jun-09 7:29

rick0557 wrote:
WHY DOEST THIS DIDN'T WORK?

Open regedit.exe
and check if the following reg key exist !

HKLM\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\SystemRestore\\

and if it's not , then replace

OpenSubKey

with

CreateSubKey

P.S
Always use

CreateSubKey

it's try to open the key and if it's not exist then create it .

I know nothing , I know nothing ...

0x3c05-Jun-09 8:02

0x3c0

5-Jun-09 8:02

rick0557 wrote:
RegKeyWrite.("DiskPercent",0);

You've not specified a method. SetValue may be relevant

rick0557 wrote:
RegKeyWrite.OpenSubKey("DiskPercent");

You should be assigning the result of this invocation to RegKeyWrite

Between the idea
And the reality
Between the motion
And the act
Falls the Shadow

Dave Kreskowiak5-Jun-09 9:51

Dave Kreskowiak

5-Jun-09 9:51

Registry KEYS are the folders you see in RegEdit.

Registry VALUES are the named items in the folders (Keys).

I think you're looking for something more like:

RegistryKey RegKeyWrite = Registry.LocalMachine.OpenSubKey("SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\SystemRestore");
RegKeyWrite.SetValue("DiskPercent",0);
RegKeyWrite.Close();

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Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008

rick05565-Jun-09 13:19

5-Jun-09 13:19

Thank You for your answer
Tried it but that did change anything either.
Guess I'll have to give my program permission to set values in the registry
Regards
Rick

Dave Kreskowiak5-Jun-09 17:25

Dave Kreskowiak

5-Jun-09 17:25

You don't give your "program" permissions to the registry. Your application runs as YOU, or the person or ID that launched it. If you don't have permissions to change that value, you have to use a higher level user account, like an Admin account.

If you're running the code under a normal user account, just about the entire HKEY_LOCAL_MACHINE hive is off-limits. If you're code is not just swallowing the exceptions, your code should have thrown an Access Denied error, or something very similar.

A guide to posting questions on CodeProject[^]

Dave Kreskowiak
Microsoft MVP
Visual Developer - Visual Basic
2006, 2007, 2008

rick05565-Jun-09 20:04

Parse out all the "{" + string + "}" occurences?

5-Jun-09 20:04

Thank You for your reply,
Got it figured out. just one of those rookie mistakes.
your origional solution was right on the mark.
worked just fine once I got my head around it.
Regards
Rick

_iobuf5-Jun-09 6:35

_iobuf

5-Jun-09 6:35

Is there a way to iterate through a string of text and find each occurence of a string that contains a substring of "{" + (variable string) + "}" and replace it with a corresponding string defined in a dictionary (of which the key value is the "{" + (variable string) + "}" ??

Re: Parse out all the "{" + string + "}" occurences?

I Believe In GOD5-Jun-09 6:40

I Believe In GOD

5-Jun-09 6:40

string OldStr = "Application";
string NewStr = "Program";

            string str = @"Run the Application , Close the Application and  Delete the Application";
            str = str.Replace(OldStr, NewStr);

I know nothing , I know nothing ...

Re: Parse out all the "{" + string + "}" occurences?

_iobuf5-Jun-09 6:42

_iobuf

5-Jun-09 6:42

Thanks.. I used that in a loop and put all the key values as the string to be replaced

Re: Parse out all the "{" + string + "}" occurences?

MidwestLimey5-Jun-09 6:41

MidwestLimey

5-Jun-09 6:41

Yes.

I suppose you'll want a hint as to how! Smile | :)

If the string is formatted such that { and } only occur as a wrapper to a variable name then the easiest way I can think of is to run a regex on it, match all "\{[^\}]\}" and iterate through them.

If not you'll probably have to write a lexer of some kind.

10110011001111101010101000001000001101001010001010100000100000101000001000111100010110001011001011

Re: Parse out all the "{" + string + "}" occurences?

_iobuf5-Jun-09 6:44

_iobuf

5-Jun-09 6:44

This is a good solution too, thx

Re: Parse out all the "{" + string + "}" occurences?

Guffa5-Jun-09 10:43

Guffa

5-Jun-09 10:43

Given that you have the text in the text variable and the replacements in the replacements dictionary:

text = RegEx.Replace(text, @"\{(.+?)\}", m => replacements[m.Value]);

Despite everything, the person most likely to be fooling you next is yourself.

Talking to htpasswd.exe

Johan Martensson5-Jun-09 6:17

Johan Martensson

5-Jun-09 6:17

Can anyone see what I'm doing wrong here?
All I want to do is generate a password with htpasswd.exe and it looked
easy enough but it just gets stuck at ReadLine() Confused | :confused:

ProcessStartInfo ps = new ProcessStartInfo();
ps.FileName = Path.Combine(Application.StartupPath, "htpasswd.exe");
ps.Arguments = "-n test";
ps.CreateNoWindow = true;
ps.UseShellExecute = false;
ps.RedirectStandardInput = true;
ps.RedirectStandardOutput = true;
ps.RedirectStandardError = true;

Process proc = new Process();
proc.StartInfo = ps;
proc.Start();

proc.StandardInput.WriteLine("testing");
proc.StandardInput.WriteLine("testing");

string line = proc.StandardOutput.ReadLine();
			
proc.Close();

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Henry Minute5-Jun-09 10:21

Henry Minute

5-Jun-09 10:21

I know nothing about 'htpasswd', but generally a ReadLine() method expects a carriage return. Did you hit return?

Henry Minute

Do not read medical books! You could die of a misprint. - Mark Twain
Girl: (staring) "Why do you need an icy cucumber?"
“I want to report a fraud. The government is lying to us all.”

Johan Martensson5-Jun-09 11:39

Johan Martensson

5-Jun-09 11:39

The WriteLine adds a carriage return so that part is ok.
I found what I had missed, the command-prompt needed to
exit before it returned the result.

So adding this before reading the output solved it:

proc.StandardInput.WriteLine("exit");

http://johanmartensson.se - Home of MPEG4Watcher

DaveyM695-Jun-09 11:19

DaveyM69

5-Jun-09 11:19

The exe basically generates md5 hashed passwords IIRC. That can be done in code without needing that exe. Search for MD5 c# and you'll find many results. Here are a couple:
http://www.spiration.co.uk/post/1203/MD5%20in%20C%23%20-%20works%20like%20php%20md5()%20example[^]
http://blogs.msdn.com/csharpfaq/archive/2006/10/09/How-do-I-calculate-a-MD5-hash-from-a-string_3F00_.aspx[^]

Dave
BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)
Visual Basic is not used by normal people so we're not covering it here. (Uncyclopedia)
Why are you using VB6? Do you hate yourself? (Christian Graus)