SQL Server :: Try To Log In To The Server Instance To Get An Error Log In Failed For User Xxx (error 18456)
Sep 12, 2010
I just installed sql server 2005 to my pc and when i try to log in to the server instance i get an error log in failed for user xxx (error 18456).I browse to the server instance and i keep getting the same error even though i chose windows authentication option during the installation.
I restarted the service for the sql server instance (which is running).The only problem i can think about is a problem with permissions but again there should not be any problem there because i logged in as administrator
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Nov 21, 2012
Microsoft sql server error 18456 in sql server 2008 r2login failed for user sasql server was working properlyi just restarted the system and then i started getting the above errorhow do i resolve iti am able to login with windows authentication but not sql authentication....
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Oct 27, 2010
I am facing the problem to acess the Data Base. some time ago i am easily acess the data base by typing the server name(like 127.80.1.7) and type the user id and password from web.config file but now i am find the error.like Login failed for user 'NSAdmin' (Microsoft Sql Server, Error:18456).
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Jul 28, 2010
I have created roles and users using ASP.NET configurations for login validations, it works fine if I run my application within project but when I publish my site and try to run from my Inetpub it giving this error. I tried all shorts of solutions posted in website but nothing worked for me.
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Sep 23, 2010
I've created a small website with a simple sqlite database using vwd 2010 .net 4. In dev and test envionments everything works fine, however when i promote to my hosting provider i receive the following error:
A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections.
(provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)
I've been configuring the connection strings (autogenerated from entity framework and attached db) but unable to get it working on the hosting provider, I'm assuming it's related to permissions but not entirely sure how to resolve - here's the web.config as it stands:
<add
name="ApplicationServices"
connectionString="data [code].....
For info the environments are set up as follows:
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Nov 23, 2010
I just installed sql server 2008 R2 on my computer. I am trying to connect to sql server throught my C# code and everytime I run the C# program,
I get this error "A network-related or instance-specific error occurred while establishing a connection to SQL Server.
The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) "
The connection string that I used in my web.config file is
[Code]....
I am not sure what am I doing wrong, but I followed this article below step by step and still I am getting the same error
http://blog.sqlauthority.com/2009/05/21/sql-server-fix-error-provider-named-pipes-provider-error-40-could-not-open-a-connection-to-sql-server-microsoft-sql-server-error/
My instance name is MSSQLSERVER and the server that I am using is on my local machine and it has my computer name in it.
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Mar 9, 2011
In fact, I DO NOT want to ask a question but to share one solution to this. One cause of this problem is you did not register your sql express on iis.I installed .net 3.5 sp1, then ran aspnet_iis -i, then installed sql express 2005 advanced. Yes, here came the notorious alert. So, I ran aspnet_regiis again and everything is OK.Run aspnet_regiis before you have installed sql express.
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Apr 19, 2010
I have a simple asp .net web project I'm working on, and while normally everything is going fine, if I try to debug the site, I get "SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified". I'm not sure if its a weird code issue or a weird SQL Server Issue, but here are the system specs anyway.
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Sep 13, 2010
Whenever I have my database open in Visual Studio 2010 Express, I get this error:
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Jun 15, 2010
while i was using sql server authentication, it was running a quite good but suddenly it starts showing an error 'Login Failed for user sa'
Here is my error-Login failed for user 'sa'.
Description:An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.Data.SqlClient.SqlException: Login failed for user 'sa'.
Here is my code-
<add name="MyDB" connectionString="Data Source=ERPTEST;Initial Catalog=LoginDatabase;User ID=sa;Password=sa"
providerName="System.Data.SqlClient" />
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Oct 11, 2010
I can't believe my eyes it's so hard to do just that ! Why can't I use MS Access instead of SQL Server Express ? So since I'm stucked with SQL Server Express, how can I make it work on my dedicated IIS 7 Server on Windows 2008 ?
I have copied under the root directory of the server. The website works until I try to login then I get:
Failed to generate a user instance of SQL Server
how to deploy this simple example used by Microsoft or can I ?
Update: in case it does matter I have installed SQL Server 2008 Express Advance Services Edition.
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May 25, 2010
I am REALLY stuck with this and need a solution in the next 24 hours .i I have uploaded my asp.net web application to the web and have the database and connection strings functioning and reading the data from the database. But when I try to write to the DB
I get the following error :
Server Error in '/' Application.
A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections.
(provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)
Description:An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.Data.SqlClient.SqlException: A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that
SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)
The wierd thing about this is the connection strings work from the local machine when I run from Visual Studio and I can write to the DB there, I just cannot write to the DB from the URL.
I am pretty new to asp.net but I am sure it has to be something to do with the web.config.
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Jan 19, 2011
A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)
when i upload my site on webserver and connect with remote sqlserver2005 using connection string....
<connectionStrings>
<remove name="ConnectionString"/>
<add name="ConnectionString" connectionString="Data Source=69.16.253.19,1433;Initial [code]...
it shows an error above ..i m using aspnetdb.mdf in my website in APP_Data Folder... features i use in my website is Login Control, Password recovery, signup control...
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Sep 8, 2010
I am trying to create a simple login page in ASP.NET C# but am getting some error.
I googled about the error, and tried all the solutions but to no avail.What am I doing wrong? The error is:
"A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)"
I think it's something to do with my connection string which is as follows:
<add name="cn"
connectionString="server=HCL;DataBase=GS;Integrated Security=True" />
"HCL" is another machine connected to my PC through the LAN and this database, "GS", resides on it. Is the problem with the value I am giving in "Server" attribute of the above code? If not what else may I be doing wrong?
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Apr 22, 2010
Following is the error I am getting while accessing some of the pages on my website.
A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections.
(provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)
It is trowing an exception and giving the about mentioned error.
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Jan 22, 2011
i have an asp.net project in vs2010 i have a db and table inside the app_data folder, i have created a deployment package and have imported the package into an iis server that is installed on my local mechine.
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Failed to generate a user instance of SQL Server due to failure in retrieving the user's local application data path. Please make sure the user has a local user profile on the computer. The connection will be closed
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when running it inside VS2010 it`s working fine.
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Sep 11, 2010
Failed to generate a user instance of SQL Server due to a failure in starting the process for the user instance. The connection will be closed.
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Sep 20, 2010
we have a web application that one company prepared for us. this application read connection string from registery key in hkey_local_machine and connect to sql server 2005 database. It worked correctly in windows server 2003. we changed our Server'OS to windows server 2008. but we have a problem to login. after try to login we see this error: Server Error in '/dabir' Application. Login failed for user ''. The user is not associated with a trusted SQL Server connection. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.Data.SqlClient.SqlException: Login failed for user ''. The user is not associated with a trusted SQL Server connection. Source Error:
[Code]....
Stack Trace:
[Code]....
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Mar 13, 2011
I try to login to SQL Server Management Studio, using Windows Authentication and I get the error message:
Cannot connect to L-VAIOsqlexpress.
------------------------------
A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider:
SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified) (Microsoft SQL Server, Error: -1)
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Jan 25, 2011
I published my web.The problem is that the path to the DataBase is not good and i dont know how to change it.heare is the error:A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)
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Aug 4, 2010
I am using Sql Server 2008 to connect to a Remote Server. Everything was working fine for the last couple of months, and i was successfully connecting to the remote server. Today it suddenly stopped connecting to the remote server. note that i did not alter any configuration settings. Did my isp block Sql Server. My ISP is using ISA SERVER? The error details are:
A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) (.Net SqlClient Data Provider) I am using Microsoft Firewall Client For ISA Server for opening ports. But today nothing is working.
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Dec 15, 2010
I have the following query that uses a linked server that is on a different VLAN of our network:
[Code]....
It works fine in Query Analyzer but when I put it into Visual Web Developer 2008 Express as a SQL Data Source I get an error:
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Nov 18, 2010
My website is running well when i used windows authentication In web.config file i used the connection string as follow
<add key="connect" value="Data Source=MMSEEE;Initial Catalog=CCC;Integrated Security=True"/>
When i use sql server authentication i am getting the error like Login failed for user 'sa'. In web.config file i used the connection string as
<add key="connect" value="Data Source=MMSEEE;Initial Catalog=CCC;User ID=sa;Password=***********"/>.
When installing Sql Server 2005 i configured both windows authentication and sqlserver authentication, and i am able to connect with both sqlserver authentication and windows authentication in msserver management studio.
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