Error in using LDAP in IIS which is working fine in local machine

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<pre>"LDAP://xxxxxxx.co.uk" </pre>

I am using this ldap function in my project and it is working fine in my local machine, but when i execute in IIS it shows me an error

DirectoryEntry dsresult = sresult.GetDirectoryEntry();

<pre>Object reference not set to an instance of an object</pre>

I have changed the string like this and i tried still it shows me error.

"LDAP://dc=xxxxxx,dc=co,dc=uk"

Please help me what changes to be done in LDAP fuction to make the project run successfully in IIS

Posted 29-Oct-13 2:05am

sathish kumar

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thatraja 29-Oct-13 8:10am

what's the error?

sathish kumar 29-Oct-13 8:52am

Object reference not set to an instance of an object in the line DirectoryEntry dsresult = sresult.GetDirectoryEntry();

ZurdoDev 29-Oct-13 8:40am

It's likely a permissions issue, but the error doesn't seem like it would be. Or, that error is not happening on that line of code.

sathish kumar 29-Oct-13 8:53am

if I comment all the ldap lines
string connection = ConfigurationManager.ConnectionStrings["ADConnection"].ToString();
DirectorySearcher dssearch = new DirectorySearcher(connection);
string SAM = System.Web.HttpContext.Current.Request.LogonUserIdentity.Name.ToString();
dssearch.Filter = "(sAMAccountName=" + SAM.Substring(10, SAM.Length - 10) + ")";
SearchResult sresult = dssearch.FindOne();
DirectoryEntry dsresult = sresult.GetDirectoryEntry();

it's working fine, so i believe the error may be in this line only... if in case permission issue how to solve it?

ZurdoDev 29-Oct-13 9:03am

Well, figure out the exact line of code causing the error first.

sathish kumar 29-Oct-13 9:24am

The error is I am getting following return from the code instead of my logonuseridentityname.

string SAM = System.Web.HttpContext.Current.Request.LogonUserIdentity.Name.ToString();

SAM = NT AUTHORITY\IUSR

ZurdoDev 29-Oct-13 9:42am

What?
System.Web.HttpContext.Current.Request.LogonUserIdentity.Name.ToString(); is giving an error?

sathish kumar 29-Oct-13 11:01am

nope it's not an error, it's just returning the NT AUTHORITY\IUSR' which is the default anonymous connection user.

but what I am looking is, it should return my logonuseridentityname rather than the default NT AUTHORITY\IUSR

ZurdoDev 29-Oct-13 11:08am

This is a different issue then what you started with; however, you have to turn off anonymous access if you want to get the user name that way.

sathish kumar 29-Oct-13 9:24am

The error is I am getting following return from the code instead of my logonuseridentityname.

string SAM = System.Web.HttpContext.Current.Request.LogonUserIdentity.Name.ToString();

SAM = NT AUTHORITY\IUSR

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Dave Kreskowiak · Accepted Answer · 2013-10-29T03:05:00

Solution 1

Based on the little bit of information you've provided, it's probably because the account that your ASP.NET code is running under does not have Read permissions to the directory you're querying.

Posted 29-Oct-13 3:05am

Dave Kreskowiak