Error while retreiving particular user details from AD

[pusalaanita]

am geting the following exception

: System.NullReferenceException: Object reference not set to an instance of an object.

Source Error:

Line 196: internal static string GetProperty(DirectoryEntry oDE, string PropertyName)
Line 197: {
Line 198: if (oDE.Properties.Contains(PropertyName))
Line 199: {
Line 200: return oDE.Properties[PropertyName][0].ToString(); I am using this to retrieve details all users(LoadAllUsers) its works fine but when I am and retrieving a particular user details (LoadUser(UserName))it is giving the above exception.I am not able to trace out the error.I have checked with many other code samples and they r using the same.Please , help me in solving it.TksBye

 

[ca8msm]

Try stepping through the code...you'll see that a particular object hasn't been set top a specific instance (for example, it may have to be declared as New).


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[pusalaanita]

I am using an Instance.

 

[raghu3]

What is UserName: it probably has to be the sAMAccountName.
I did some AD querying using c#, some parts were a challenge.
If you could expand the code snippet, maybe it will ring a bell.
-raghu

 

[pusalaanita]

Yes it is sAMAccountName

 

[raghu3]

If it is with only one user ot any single user ?
do you do a findOne(), if findAll() works, findOne should also work.
how is your query: in c# I have something like this for findOne():

string strFilter = "(samaccountname=" + uid +")";

// Connect to Domain controller: LDAP string
System.DirectoryServices.DirectoryEntry entry = new System.DirectoryServices.DirectoryEntry(_strLDAP);


// Search object
System.DirectoryServices.DirectorySearcher mySearcher =new System.DirectoryServices.DirectorySearcher(entry);

// Search filters
mySearcher.Filter = strFilter;
mySearcher.SearchScope=SearchScope.Subtree;


// Get the directory entry
System.DirectoryServices.SearchResult result=mySearcher.FindOne();
if (result != null)
{
System.DirectoryServices.DirectoryEntry de=result.GetDirectoryEntry();

// Do process ...

 

[pusalaanita]

can u post the full code of the above

 

[raghu3]

Here is a function snippet. This gets all the attributes for an account:

// Connect to ldap
System.DirectoryServices.DirectoryEntry entry =new System.DirectoryServices.DirectoryEntry(_strLDAP); //your ldap


// Search object
System.DirectoryServices.DirectorySearcher mySearcher =new System.DirectoryServices.DirectorySearcher(entry);


// Search filters
mySearcher.Filter = filter; // filter=filter="(&(&(objectClass=user)(SAMAccountName="+ uid.Trim() +")))"; // uid=your user Id


mySearcher.SearchScope=SearchScope.Subtree;
// FindOne() Vs FindAll() ...
SearchResult mySearchResult = mySearcher.FindOne();


if (mySearchResult != null )
{
// Print the properties.
ResultPropertyCollection myResult;
myResult=mySearchResult.Properties;
System.DirectoryServices.DirectoryEntry de = mySearchResult.GetDirectoryEntry();

foreach(string myKey in myResult.PropertyNames)
{

foreach( Object myCollection in myResult[myKey])
{
attribValue=myCollection.ToString();
Console.WriteLine(myKey + ":" + attribValue);
}

}
}

 

[pusalaanita]

Hi can u send the strLDAP example

 

[raghu3]

LDAP://yourserver../DC=..,DC=..,DC=..

where yourserver is the domain controller server:someserver.com

Can you give post your ldap string instead ...

Alternatively check out the microsoft scripting site for samples:

http://www.microsoft.com/technet/scriptcenter/scripts/ad/default.mspx