Search through Windows Active Directory

Search through Windows Active Directory

How to search through Windows Active Directory is a topic
that will be presented in this post by writing some simple functions.

using System.DirectoryServices;

using System.Collections.Generic;

using System;

namespace photointeraction

{
////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////

///// Description: Simple functions to search through 
///// Microsoft Windows Active Directory
///// Author: G. R. Roosta
///// License: Free To Use (No Restriction)

////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////

public static class Integerphoto

{

/// <summary> 
/// Authenticate user against a domain.
 /// </summary> 
/// <param name="loginName"></param>
 /// <param name="domainPath"></param>
 /// <returns></returns>
public static bool AuthenticateUser(string loginName, string domainPath){string userName = loginName.Substring(loginName.LastIndexOf('\\') + 1);DirectoryEntry searchRoot = new DirectoryEntry(domainPath);DirectorySearcher search = new DirectorySearcher(searchRoot);search.Filter = String.Format("(&(objectClass=user)(objectCategory=person)(SAMAccountName={0}))", userName);search.PropertiesToLoad.Add("cn");SearchResult result = search.FindOne();return result != null;}

/// <summary>/// Check if a user login exists is in the current/// Windows Active Directory./// </summary>/// <param name="loginName"></param>/// <returns></returns>public static bool CheckLogin(string loginName){string userName = loginName.Substring(loginName.LastIndexOf('\\') + 1);DirectorySearcher search = new DirectorySearcher();search.Filter = String.Format("(SAMAccountName={0})", userName);search.PropertiesToLoad.Add("cn");SearchResult result = search.FindOne();return result != null;}

/// <summary>

/// Retrieve list of all users in a domain./// </summary>/// <param name="domainPath">domainPath is set like "LDAP://DomainName"</param>/// <returns></returns>public static List<string> GetDomainUsers(string domainPath){List<string> rtn = new List<string>();DirectoryEntry searchRoot = new DirectoryEntry(domainPath);DirectorySearcher search = new DirectorySearcher(searchRoot);search.Filter = "(&(objectClass=user)(objectCategory=person))";search.PropertiesToLoad.Add("samaccountname");SearchResult result;SearchResultCollection resultCol = search.FindAll();if (resultCol != null){for (int counter = 0; counter < resultCol.Count; counter++){result = resultCol[counter];if (result.Properties.Contains("samaccountname")){rtn.Add((String)result.Properties["samaccountname"][0]);}}}return rtn;}

/// <summary>

/// Return list of users of an Active Directory group./// </summary>/// <param name="groupName"></param>/// <returns></returns>public static List<string> GetGroupUsers(string groupName){List<string> rtn = new List<string>();SearchResult result;DirectorySearcher search = new DirectorySearcher();search.Filter = String.Format("(cn={0})", groupName);search.PropertiesToLoad.Add("member");result = search.FindOne();if (result != null){for (int counter = 0; counter < result.Properties["member"].Count; counter++)

{

string user = (string)result.Properties["member"][counter];rtn.Add(user);

}

}return rtn;

}

}

}

Brighten Photo

Brighten Photo 

In this post, a simple function is presented to brighten/darken photos. In this function I use GDI+ and write code in unsafe mode (for efficiency).

using System.Drawing;

using System.Drawing.Imaging;

using GRBIF._CONST;

using System;

namespace IntelliPhoto

{

// Description: A simple GDI+ function for brightening

// Author: G. R. Roosta

// License: Free To Use (No Restriction)

public class BasicFilter

{

public static void Brighten(Bitmap bitmap, int brightness, string newFullFileName)

{

Brighten(bitmap, brightness);

bitmap.Save(newFullFileName);

return;

}

public static void Brighten(Bitmap bitmap, int brightness) // -255 <= brightness <= 255

{

if (brightness < -255 brightness > 255)

throw new Exception("Invalid 'brightness' value!");

BitmapData bmpData = bitmap.LockBits(

new Rectangle(0, 0, bitmap.Width, bitmap.Height),

ImageLockMode.ReadWrite,

PixelFormat.Format24bppRgb);

int stride = bmpData.Stride;

System.IntPtr Scan0 = bmpData.Scan0;

unsafe
{

byte* ptr = (byte*)(void*)Scan0;

int offset = stride - bitmap.Width * 3;

int netWidth = bitmap.Width * 3;

for (int y = 0; y <>

{

for (int x = 0; x <>

{

int c = ptr[0] + brightness;

if (c > 255)
c = 255;

else if (c <>

c = 0;

ptr[0] = (byte)c;

++ptr;

}

ptr += offset;

}

}

bitmap.UnlockBits(bmpData);

return;

}

}

}

Example:

Original Image (taken by Digital Camera: Sony DSC-S650)




Brightened with brightness=+40 using IntelliPhoto.BasicFilter.Brigten



Brightened with brightness=+80 using IntelliPhoto.BasicFilter.Brigten





Brightened with brightness=-40 using IntelliPhoto.BasicFilter.Brigten





Brightened with brightness=-80 using IntelliPhoto.BasicFilter.Brigten