Re: Object reference not set to an instance of an object.
From: Ignacio Machin \( .NET/ C# MVP \) ("Ignacio)
Date: 08/27/04
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Date: Fri, 27 Aug 2004 15:53:50 -0400
Hi,
Check the configuration of your app, both in the web.config and in IIS and
make sure both are the same.
cheers,
-- Ignacio Machin, ignacio.machin AT dot.state.fl.us Florida Department Of Transportation "Jason Kumpf" <jknaty@yahoo.com> wrote in message news:2d0278c.0408270728.1f55aaf4@posting.google.com... > I basically built a C# ASP.Net application on my local machine > (running Windows XP, MSSQL2000, IIS) and it has been tested and ready > for deployment. So I deploy it to our server (running Windows 2003 > Advanced Server, MSSQL 2000, IIS). So I go to the site locally in > case of an error (http://localhost/myApp/) and it works until a > particular page. All the .aspx.cs page does is call one of my classes > but I get: "Object reference not set to an instance of an object." on > the line where I am calling a method of that class. This doesn't make > sense to me as to why it works on my local machine and not the server > as well as why that error, especially since the defailt.aspx.cs page > calls that class and one of its methods. Here are some snips of code > to clarify. > > ================================================================ > // This is the section where the error occurs, the last statement is > the line. > IPrincipal person = HttpContext.Current.User; > LATools.classes.LDAPUser ldUser = new LATools.classes.LDAPUser(); > string username = person.Identity.Name.ToString(); > string password = Session["ldapPassword"].ToString(); > string context = Session["ldapContext"].ToString(); > LdapConnection conn = ldUser.doConnect( > username > , password > , context > ); > > // This is what IE shows > Exception Details: System.NullReferenceException: Object reference not > set to an instance of an object. > > Source Error: > Line 63: IPrincipal person = HttpContext.Current.User; > Line 64: LATools.classes.LDAPUser ldUser = new > LATools.classes.LDAPUser(); > Line 65: LdapConnection conn = ldUser.doConnect( > Line 66: person.Identity.Name.ToString() > Line 67: , Session["ldapPassword"].ToString() > > > // And just to maybe help more here is the method's code which uses > the > // Novell.Directory.Ldap class. > public LdapConnection doConnect(string username, string password, > string context) > { > string ldapHost = ConfigurationSettings.AppSettings["ldapServer"]; > int ldapPort = System.Convert.ToInt32(ConfigurationSettings.AppSettings["ldapPort"]); > LdapConnection conn = new LdapConnection(); > conn.Connect(ldapHost, ldapPort); > string ldapDN = findUserDN(conn, username, context); > if (conn.Connected == true) > { > try > { > conn.Bind(ldapDN, password); > } > catch (LdapException exp) > { > string sError = exp.LdapErrorMessage; > return conn; > } > } > return conn; > } > > This is critical to our network and since I work for a University our > Quarter is starting soon and we need this to work for our labs. > Thanks!
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