Showing posts with label form. Show all posts
Showing posts with label form. Show all posts

Friday, March 23, 2012

Login failed for user (null)

I am creating a Data Web Form using the Data Form Wizard.
After configuring a valid connection to a SQL Server on my network, I receive the following error when trying to run the page: "Login failed for user '(null)'. Reason: Not associated with a trusted SQL Server connection."
Any ideas?

Thanks,
MarkYou need to put a proper user id and password in your connection string? Or you haven't filled out the properties properly to do the click and drag method.|||Kay -
Thanks for the response.
I initially configured the connection to use Windows Authentication. Since this didn't work, I entered my username and password using SQL Authentication. Neither seems to work. Now, I'm thinking it has something to do with not having the ASPNET username set up as having access to the SQL database.
Does this make sense?

Mark|||Did you try using IUSR_machinename?|||Jake -
What exactly is IUSR_machinename?
Where would I reference this in my connection string?

Thanks,
Mark|||Are you doing this on an Intranet or are you using a webhost?

IUSR_machinename is an anonymous internet user set up by IIS.|||I am attaching to my localhost for testing purposes.
If I attach to a SQL database on my local machine, I have no problems with the login.
If I try attaching to a database on any other server, I receive the error.

Mark|||Here's my connection string in my web.config


<appSettings>
<add key="connString" value="server=66.24.255.01;pwd=Jeckel;uid=Jake;database=JakeJeck" />
</appSettings>

What does your connection string look like?|||Jake -
I don't have an <appSettings> tag within my web.config file.
I added one using your example, but receive an error about an unrecognizable configuration section.
Where else could my connection string be located?

Thanks,
Mark|||Your entire web.config could look something like this:


<?xml version="1.0" encoding="utf-8" ?>
<configuration
<appSettings>
<add key="connString" value="server=69.56.xxx.xxx;uid=xxx;pwd=xxx;database=JakeJeck"/>
</appSettings
<system.web>
<!-- DYNAMIC DEBUG COMPILATION
Set compilation debug="true" to insert debugging symbols (.pdb information)
into the compiled page. Because this creates a larger file that executes
more slowly, you should set this value to true only when debugging and to
false at all other times. For more information, refer to the documentation about
debugging ASP.NET files.
-->
<compilation defaultLanguage="vb" debug="true" /
<!-- CUSTOM ERROR MESSAGES
Set customErrors mode="On" or "RemoteOnly" to enable custom error messages, "Off" to disable.
Add <error> tags for each of the errors you want to handle.
-->
<customErrors mode="RemoteOnly" /
<!-- AUTHENTICATION
This section sets the authentication policies of the application. Possible modes are "Windows",
"Forms", "Passport" and "None"
-->
<authentication mode="Forms" /
<!-- AUTHORIZATION
This section sets the authorization policies of the application. You can allow or deny access
to application resources by user or role. Wildcards: "*" mean everyone, "?" means anonymous
(unauthenticated) users.
-->
<authorization>
<allow users="*" /> <!-- Allow all users --
<!-- <allow users="[comma separated list of users]"
roles="[comma separated list of roles]"/>
<deny users="[comma separated list of users]"
roles="[comma separated list of roles]"/>
-->
</authorization
<!-- APPLICATION-LEVEL TRACE LOGGING
Application-level tracing enables trace log output for every page within an application.
Set trace enabled="true" to enable application trace logging. If pageOutput="true", the
trace information will be displayed at the bottom of each page. Otherwise, you can view the
application trace log by browsing the "trace.axd" page from your web application
root.
-->
<trace enabled="false" requestLimit="10" pageOutput="false" traceMode="SortByTime" localOnly="true" /
<!-- SESSION STATE SETTINGS
By default ASP.NET uses cookies to identify which requests belong to a particular session.
If cookies are not available, a session can be tracked by adding a session identifier to the URL.
To disable cookies, set sessionState cookieless="true".
-->
<sessionState
mode="InProc"
stateConnectionString="tcpip=127.0.0.1:42424"
sqlConnectionString="data source=127.0.0.1;user id=sa;password="
cookieless="false"
timeout="20"
/
<!-- GLOBALIZATION
This section sets the globalization settings of the application.
-->
<globalization requestEncoding="utf-8" responseEncoding="utf-8" /
</system.web
</configuration>

Then you simply access connString and you have your connection information available.sql

login failed for 'user' (Application Role)

I've created a database in SQL Express and I have a Windows form attempting to connect to it through SQL Authentication. Connection string:

private string connString = @."Data Source=.\sqlexpress;Initial Catalog=SQLTestDatabase;User ID=SearchAppRole; Password=password;";

The role I have added to the database is an Application Role. It has been added to the Database permissions with Grant checked for "Select" and "Authenticate".

If I test this with query analyzer, it returns expected results (if I remove Grant from 'Select', it fails)

sp_setapprole 'SearchAppRole', 'password'

select * from recipe

If I edit my connection string (for testing purposes) to use the sa account, the application can connect and run the Select statement:

private string connString = @."Data Source=.\sqlexpress;Initial Catalog=SQLTestDatabase;User ID=sa; Password=sa_password;";

However, I cannot get the application to successfully logon and run the select statement when using the user id and password of the Application Role. I get error:

System.Data.SqlClient.SqlException: Login failed for user 'SearchAppRole'. at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj

I can't find much information on Application Role...I just want one basic permission for the application as a whole. Any help is appreciated. Thanks.

You will first have to connect with a valid user on the database to set the application role. The user can be a dummy user having no access to the actual stored objects. But for using the command you will have to first open a connection to the database.

HTH, Jens K. Suessmeyer.

http://www.sqlserver2005.de
|||Ok. I'm sure this works, and I think I found an example of it here on these forums. However, I decided to just add a User to the database and work with that. I'm not sure that I really need to use Application Role and I don't know why it isn't more straightforward. Thanks.sql

Login failed for user <servername>\<aspnet> error!

Hi all..

I really really need some help here. I have created a login application which is using samples from Microsoft's persistent cookie logon form using Forms authentication.

I am using Windows XP Pro, Visual Web Developer 2005 and SQL Server Enterprise Edition, IIS version 5.

Now my problem is that, when I was doing this login in the the local computer, everything works very fine. I am able to log in to my application thru the login sample that I had mentioned earlier. But when I upload it into the test server, it gives me this error:

"Login failed for user <servername>\<aspnet>"

I have tried googling around but to no avail. I have tried all sorts of means to get my application working as soon as possible because my company needs to upload them into production.

Hopefully needs to get some pointers here..

Thank you in advance..Hi all..

I really really need some help here. I have created a login application which is using samples from Microsoft's How To Implement Forms-Based Authentication in Your ASP.NET Application by Using Visual Basic .NET. It is using Forms authentication.

I am using Windows XP Pro, Visual Web Developer 2005 and SQL Server Enterprise Edition, IIS version 5.

Now my problem is that, when I was doing this login in the the local computer, everything works very fine. I am able to log in to my application thru the login sample that I had mentioned earlier. But when I upload it into the test server, it gives me this error:

"Login failed for user <servername>\<aspnet>"

I have tried googling around but to no avail. I have tried all sorts of means to get my application working as soon as possible because my company needs to upload them into production.

Hopefully needs to get some pointers here..

Thank you in advance..

Monday, March 19, 2012

Login failed

Hi,

I can connect to the SQL server installed in another machine in our network. But when I run the web form I'm having this error.

Login failed for user ''. The user is not associated with a trusted SQL Server connection.

Pls help me

your sql server to need to setup account for this paticular machine to access.|||

Hi lakmalvbj,

From your description, I understand you can use SQL client tool to connect the remote SQL Server by window authentication, but Web Form fail. If I have misunderstood your concern, please feel free to let me know.

The error message isLogin failed for user ''. The user is not associated with a trusted SQL Server connection.

I find the user name is null. Is it the intact error message?

If the error message is intact. For the user who login fail is null, I believe you were using Impersonation in web.config with simply section:

<identityimpersonate="true" />

When a client view the page with Windows Authentication, the primary token can be passed only once and cannot be used for connecting remove database. So the null user login fail error occured. this is a design feature of NTLM security. And the solution is set username and password in identity section.

<identityimpersonate ="true"username="Domain\UserName"password="pword"/>

Or change the connect string to use SQL authentication.

|||

Hi,

Thanks for all replies.

I solved the problem by creating new user in sql server and giving l user name and password in Connection String. Work fine.

Dim myconnection As SqlConnection = New SqlConnection("workstation id="Ur Work Station";packet size=4096;user id=XXXX;password=XXXX;data source=Server;initial catalog=Database")

This work fine. I tried Benson Yu's suggestions. It also work fine