C# 4 and .NET 4

OC134 ❘ ChaPTer 52 directOry services
Default Naming Context
If a distinguished name is not specifi ed in the path, the binding process will be made to the default naming
context. You can read the default naming context with the help of rootDSE . LDAP 3.0 defi nes rootDSE as
the root of a directory tree on a directory server. For example:
or
LDAP://rootDSE
LDAP://servername/rootDSE
By enumerating all properties of the rootDSE , you can get the information about the
defaultNamingContext that will be used when no name is specifi ed. schemaNamingContext and
configurationNamingContext specify the required names to be used to access the schema and the
confi guration in the Active Directory store.
The following code is used to get all properties of rootDSE :
try
{
using (var de = new DirectoryEntry())
{
de.Path = "LDAP://magellan/rootDSE";
de.Username = @"cninnovation\christian";
de.Password = "Pa$$w0rd";
PropertyCollection props = de.Properties;
foreach (string prop in props.PropertyNames)
{
PropertyValueCollection values = props[prop];
foreach (string val in values)
{
Console.Write("{0}: ", prop);
Console.WriteLine(val);
}
}
}
}
catch (COMException ex)
{
Console.WriteLine(ex.Message);
}
code snippet DirectoryServicesSamples/Program.cs
To have this code running on your machine, you must change the path to the object to
access, including the server name.
This program shows the default naming context ( defaultNamingContext DC=cninnovation, DC=local ),
the context that can be used to access the schema ( CN=Schema, CN=Configuration, DC=cninnovation,
DC=local ), and the naming context of the confi guration ( CN=Configuration, DC=cninnovation,
DC=local ), as you can see here:
currentTime: 20090925131508.0Z
subschemaSubentry: CN=Aggregate,CN=Schema,CN=Configuration,DC=cninnovation,
DC=local
dsServiceName: CN=NTDS Settings,CN=MAGELLAN,CN=Servers,
CN=Default - First - Site - Name,CN=Sites,CN=Configuration,DC=cninnovation,DC=local
namingContexts: DC=cninnovation,DC=local
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