using System;
using System.Collections.Generic;
using System.DirectoryServices;
using System.DirectoryServices.ActiveDirectory;
namespace ScpLookup
{
// This sample is for demonstration purposes only. Before you run this sample, make sure
// that the code meets the coding requirements of your organization.
class Program
{
static void Main(string[] args)
{
string domain = args[0];
Console.WriteLine("Performing SCP lookup for {0}.", domain);
List<string> scpUrls = GetScpUrls(null, domain);
Console.WriteLine("\nOrdered List of Autodiscover endpoints:");
foreach (string url in scpUrls)
{
Console.WriteLine(" {0}", url);
}
Console.WriteLine("SCP lookup done.");
}
// GUID for SCP URL keyword.
private const string ScpUrlGuidString = @"77378F46-2C66-4aa9-A6A6-3E7A48B19596";
// GUID for SCP pointer keyword.
private const string ScpPtrGuidString = @"67661d7F-8FC4-4fa7-BFAC-E1D7794C1F68";
static List<string> GetScpUrls(string ldapServer, string domain)
{
// Create a new list to return.
List<string> scpUrlList = new List<string>();
string rootDSEPath = null;
// If ldapServer is null/empty, use LDAP://RootDSE to
// connect to Active Directory Domain Services (AD DS). Otherwise, use
// LDAP://SERVERNAME/RootDSE to connect to a specific server.
if (string.IsNullOrEmpty(ldapServer))
{
rootDSEPath = "LDAP://RootDSE";
}
else
{
rootDSEPath = ldapServer + "/RootDSE";
}
SearchResultCollection scpEntries = null;
try
{
// Get the root directory entry.
DirectoryEntry rootDSE = new DirectoryEntry(rootDSEPath);
// Get the configuration path.
string configPath = rootDSE.Properties["configurationNamingContext"].Value as string;
// Get the configuration entry.
DirectoryEntry configEntry = new DirectoryEntry("LDAP://" + configPath);
// Create a search object for the configuration entry.
DirectorySearcher configSearch = new DirectorySearcher(configEntry);
// Set the search filter to find SCP URLs and SCP pointers.
configSearch.Filter = "(&(objectClass=serviceConnectionPoint)" +
"(|(keywords=" + ScpPtrGuidString + ")(keywords=" + ScpUrlGuidString + ")))";
// Specify which properties you want to retrieve.
configSearch.PropertiesToLoad.Add("keywords");
configSearch.PropertiesToLoad.Add("serviceBindingInformation");
scpEntries = configSearch.FindAll();
}
catch (Exception ex)
{
Console.WriteLine("SCP lookup failed with: ");
Console.WriteLine(ex.ToString());
}
// If no SCP entries were found, then exit.
if (scpEntries == null || scpEntries.Count <= 0)
{
Console.WriteLine("No SCP records found.");
return null;
}
string fallBackLdapPath = null;
// Check for SCP pointers.
foreach (SearchResult scpEntry in scpEntries)
{
ResultPropertyValueCollection entryKeywords = scpEntry.Properties["keywords"];
if (CollectionContainsExactValue(entryKeywords, ScpPtrGuidString))
{
string ptrLdapPath = scpEntry.Properties["serviceBindingInformation"][0] as string;
// Determine whether this pointer is scoped to the user's domain.
if (CollectionContainsExactValue(entryKeywords, "Domain=" + domain))
{
Console.WriteLine("Found SCP pointer for " + domain + " in " + scpEntry.Path);
// Restart SCP lookup with the server assigned for the domain.
Console.WriteLine("Restarting SCP lookup in " + ptrLdapPath);
return GetScpUrls(ptrLdapPath, domain);
}
else
{
// Save the first SCP pointer that is not scoped to a domain as a fallback
// in case you do not get any results from this server.
if (entryKeywords.Count == 1 && string.IsNullOrEmpty(fallBackLdapPath))
{
fallBackLdapPath = ptrLdapPath;
Console.WriteLine("Saved fallback SCP pointer: " + fallBackLdapPath);
}
}
}
}
string computerSiteName = null;
try
{
// Get the name of the ActiveDirectorySite the computer
// belongs to (if it belongs to one).
ActiveDirectorySite site = ActiveDirectorySite.GetComputerSite();
computerSiteName = site.Name;
Console.WriteLine("Local computer in site: " + computerSiteName);
}
catch (Exception ex)
{
Console.WriteLine("Unable to get computer site name.");
Console.WriteLine(ex.ToString());
}
if (!string.IsNullOrEmpty(computerSiteName))
{
// Scan the search results for SCP URLs.
// SCP URLs fit into three tiers:
// Priority 1: The URL is scoped to the computer's Active Directory site.
// Priority 2: The URL is not scoped to any Active Directory site.
// Priority 3: The URL is scoped to a different Active Directory site.
// Temporary lists to hold priority 2 and 3 URLs.
List<string> priorityTwoUrls = new List<string>();
List<string> priorityThreeUrls = new List<string>();
foreach (SearchResult scpEntry in scpEntries)
{
ResultPropertyValueCollection entryKeywords = scpEntry.Properties["keywords"];
// Check for SCP URLs.
if (CollectionContainsExactValue(entryKeywords, ScpUrlGuidString))
{
string scpUrlPath = scpEntry.Properties["adsPath"][0] as string;
Console.WriteLine("SCP URL found at {0}", scpUrlPath);
string scpUrl = scpEntry.Properties["serviceBindingInformation"][0] as string;
scpUrl = scpUrl.ToLower();
// Determine whether this entry is scoped to the computer's site.
if (CollectionContainsExactValue(entryKeywords, "Site=" + computerSiteName))
{
// Priority 1.
if (!scpUrlList.Contains(scpUrl.ToLower()))
{
Console.WriteLine("Adding priority 1 SCP URL: {0}", scpUrl.ToLower());
scpUrlList.Add(scpUrl);
}
else
{
Console.WriteLine("Priority 1 SCP URL already found: {0}", scpUrl);
}
}
else
{
// Determine whether this is a priority 2 or 3 URL.
if (CollectionContainsPrefixValue(entryKeywords, "Site="))
{
// Priority 3.
if (!priorityThreeUrls.Contains(scpUrl))
{
Console.WriteLine("Adding priority 3 SCP URL: {0}", scpUrl);
priorityThreeUrls.Add(scpUrl);
}
else
{
Console.WriteLine("Priority 3 SCP URL already found: {0}", scpUrl);
}
}
else
{
// Priority 2.
if (!priorityTwoUrls.Contains(scpUrl))
{
Console.WriteLine("Adding priority 2 SCP URL: {0}", scpUrl);
priorityTwoUrls.Add(scpUrl);
}
else
{
Console.WriteLine("Priority 2 SCP URL already found: {0}", scpUrl);
}
}
}
}
}
// Now add the priority 2 URLs into the main list.
foreach (string priorityTwoUrl in priorityTwoUrls)
{
// If the URL is already in the list as a priority 1,
// don't add it again.
if (!scpUrlList.Contains(priorityTwoUrl))
{
scpUrlList.Add(priorityTwoUrl);
}
}
// Now add the priority 3 URLs into the main list.
foreach (string priorityThreeUrl in priorityThreeUrls)
{
// If the URL is already in the list as a priority 1
// or priority 2, don't add it again.
if (!scpUrlList.Contains(priorityThreeUrl))
{
scpUrlList.Add(priorityThreeUrl);
}
}
// If after all this, you still have no URLs in your list,
// try the fallback SCP pointer, if you have one.
if (scpUrlList.Count == 0 && fallBackLdapPath != null)
{
return GetScpUrls(fallBackLdapPath, domain);
}
}
return scpUrlList;
}
private static bool CollectionContainsExactValue(ResultPropertyValueCollection collection, string value)
{
foreach (object obj in collection)
{
string entry = obj as string;
if (entry != null)
{
if (string.Compare(value, entry, true) == 0)
return true;
}
}
return false;
}
private static bool CollectionContainsPrefixValue(ResultPropertyValueCollection collection, string value)
{
foreach (object obj in collection)
{
string entry = obj as string;
if (entry != null)
{
if (entry.StartsWith(value))
return true;
}
}
return false;
}
}
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using System;
namespace Sample
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class Test
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C# is a general purpose object-oriented programming language by Microsoft. Though initially it was developed as part of .net but later it was approved by ECMA and ISO standards.
You can use C# to create variety of applications, like web, windows, mobile, console applications and much more using Visual studio.
| Data Type | Description | Range | size |
|---|---|---|---|
| int | To store integers | -2,147,483,648 to 2,147,483,647 | 4 bytes |
| double | to store large floating point numbers with decimals | can store 15 decimal digits | 8 bytes |
| float | to store floating point numbers with decimals | can store upto 7 decimal digits | 4 bytes |
| char | to store single characters | - | 2 bytes |
| string | to stores text | - | 2 bytes per character |
| bool | to stores either true or false | - | 1 bit |
datatype variable-name = value;
When ever you want to perform a set of operations based on a condition or set of few conditions IF-ELSE is used.
if(conditional-expression) {
// code
}
else {
// code
}
You can also use if-else for nested Ifs and If-Else-If ladder when multiple conditions are to be performed on a single variable.
Switch is an alternative to If-Else-If ladder.
switch(conditional-expression) {
case value1:
// code
break; // optional
case value2:
// code
break; // optional
...
default:
// code to be executed when all the above cases are not matched;
}
For loop is used to iterate a set of statements based on a condition.
for(Initialization; Condition; Increment/decrement) {
// code
}
While is also used to iterate a set of statements based on a condition. Usually while is preferred when number of iterations are not known in advance.
while(condition) {
// code
}
Do-while is also used to iterate a set of statements based on a condition. It is mostly used when you need to execute the statements atleast once.
do {
// code
} while (condition);
Array is a collection of similar data which is stored in continuous memory addresses. Array values can be fetched using index. Index starts from 0 to size-1.
data-type[] array-name;
Method is a set of statements which gets executed only when they are called. Call the method name in the main function to execute the method.
static void method-name()
{
// code to be executed
}