simra » C#

SIB (System Information Browser)

admin — Wed, 06 Jan 2010 13:22:13 +0000

A small and portable tool to get information about the system.

Download: System Information Browser v.1.0

Windows Password Changer

admin — Thu, 17 Dec 2009 20:12:29 +0000

This is a small and very useful Tool to change the password of any account on your local computer or Active Directory. It’s ideal for centrally managing the passwords of your Domain(s).

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Download: Windows Password Changer v.1.0

How to get all domains in the Active Directory using C#

admin — Thu, 17 Dec 2009 10:01:40 +0000

The following C# function returns a list of all domains in the Active Directory using System.DirectoryServices.

private StringCollection GetDomains()
{
StringCollection domains= new StringCollection();
try
{
DirectorySearcher ds= new DirectorySearcher("objectCategory=Domain");
SearchResultCollection src= ds.FindAll();
foreach (SearchResult rs in src)
{
ResultPropertyCollection rpc= rs.Properties;
foreach( object d in rpc["name"])
{
domains.Add(d.ToString());
}
}
}
catch (Exception)
{
}
return domains;
}

char[] to String in C#

admin — Mon, 14 Dec 2009 12:13:38 +0000

char[] is quite convenient if you’re reading file data using StreamReader, but it doesn’t offer the same functionality as string does. Here’s a easy way to convert char[] to String :

char[] buffer = new char[1024];
String s = new String(charBuf);

Regular Expressions in C#

admin — Fri, 11 Dec 2009 19:48:51 +0000

A regular expression is a pattern of text that describes what to match in a string. It serves as a filter to find what you’re looking for. The two main function of using regular expression is to match and to replace. The former determines if the pattern is in the string, and if so, find it. Replace changes the string according to the pattern to another pattern.

You can use regular expression (Regex) in your C# (or any other .NET language) application by importing the namespace System.Text.RegularExpressions.

The following examples show the usage of Regular Expressions in C#. I needed them in one of my project to find stuff on a website and I find them very useful.

Returns the innerHtml of a tag (i.e. div) with certain attributes (works with nested tags):

public static String GetInnerHtml(String content, String tag, String attr)
{
Regex re = new Regex(@"(<" + tag + " " + attr + "(.*?)>).*?((?<" + tag + ").*?(?<-TAG> + tag + ">))?(?(TAG)(?!)) + tag + ">");
return re.Match(content).ToString();
}

Returns all Email-Addresses:

public static String[] GetEmailAddresses(String content)
{
Regex re = new Regex(@"[\w\.-]{1,}@[\w\.-]{2,}\.\w{2,3}");
MatchCollection emails = re.Matches(content);
String[] s = new string[emails.Count];
for (int x = 0; x < emails.Count; x++)
s[x] = emails[x].ToString();
return s;
}

Removes all tags:

public static String RemoveTags(String content)
{
Regex re = new Regex("(<[^>]*>)");
content = re.Replace(content, "");
return content;
}

Returns the title tag:

public static String GetTitle(String content){
Regex re = new Regex(@"(?<=)([\s\S]*)(?=)");
return re.Match(content).ToString();
}

Get the content of an url in C#

admin — Tue, 08 Dec 2009 21:26:43 +0000

This is a easy way to get the content of a url into a string. You only need to open a new connection using HttpWebRequest, make a request and read the stream into a string. see the example below:

using System;
using System.Net;
using System.IO;

class functions
{
public static String GetUrlContent(String Url)
{
// Open a connection
HttpWebRequest hwr = (HttpWebRequest)HttpWebRequest.Create(Url);

// Specify header information like
hwr.UserAgent = "simra.ch GetUrlContent";
hwr.Referer = "http://www.simra.ch/";

// Get the Request
WebResponse wr = hwr.GetResponse();

// Open a new Stream
Stream ws = wr.GetResponseStream();

// Create a SteamReader
StreamReader sr = new StreamReader(ws);

// Read the stream
String content = sr.ReadToEnd();

// Cleanup
sr.Close();
ws.Close();
wr.Close();

return content;
}
}

Ip-Address Range Pinger

admin — Fri, 27 Nov 2009 21:46:19 +0000

Das folgende Tool ist sehr nützlich um Geräte im aktuellen Neztbereich zu suchen. Anhand der Ip-Adresse und der Subnetzmaske wird der Ip-Range bestimmt. Mit der Funktion Ping Range kann der gesamte Bereich gepingt werden. Geräte die Antwort geben, werden im Protokoll aufgeführt. Für 255 Pings braucht das Programm durchschnittlich weniger als 1 Sekunde!

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Download Ip-Address Range Pinger v.1.0