Firstly, this is not a repeat of the same old:
provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified.
Here's the scenario. I'm using ASP.NET membership with a SQLMembershipProvider. This used to work fine, however since a clean install on my development machine and upgrading to SQL Server 2014 Express, I'm now experiencing a strange issue.
When I run the website I get the login form. If I enter an incorrect username and password I get the normal message "invalid username/password". If I enter the correct username / password I get the error 26 as above. I can successfully connect to the database using the same connection string in SQL Server Management Studio, just not from within my ASP.NET Web App.
Connection String:
<connectionStrings>
<add name="WEBConnectionString"
connectionString="Server=SERSQL01\SQLEXPRESS;Initial Catalog=WEBAPP;User ID=MyLogin;Password=MyPassword"
providerName="System.Data.SqlClient"
/>
</connectionStrings>
Things I have checked:
Instance name is correct.
Firewall is disabled.
Remote connections are enabled.
TCP/IP enabled, port 1433.
SQL Browser Enabled.
Mixed mode authentication is enabled.
Telnet connects successfully.
SSSM connects successfully.
Environment:
Development Machine: Windows 8.1 with Visual Studio 2013
Server: SQL Server 2014 Express on Windows Server 2012 R2
Finally found the problem.
I was using a custom sql membership provider. But I hadn't extended the role provider:
<roleManager enabled="true" defaultProvider="SqlProvider" >
<providers>
<clear/>
<add name="SqlProvider" type="System.Web.Security.SqlRoleProvider"
connectionStringName="WEBConnectionString" applicationName="/" />
</providers>
</roleManager>
Related
net and SQL server so i am trying to do the code first approach after i created the models for the database and enable and add migrations on the packet manager when i update-database command in the packet manager it works fine but when i want to see the database in the server explorer i get the following error :
The attempt to attach to the database failed with the following information:
Login failed for user 'LAPTOP-U9AV480S\NS'.
and this is my web.config file with the connection string value
<connectionStrings>
<add name="DefaultConnection" connectionString="server = LAPTOP-U9AV480S\SQLEXPRESS2 ;AttachDbFilename=|DataDirectory|\aspnet-vidly.mdf; integrated security = true"
providerName="System.Data.SqlClient" />
the SQL server is EXPRESS and i configured the security and the login to window authentication
please help me I am stuck in this for two days
I am trying to create an App Service web app in the Azure Portal and to connect the web app to my local on-premises SQL Server database using the new Hybrid Connection feature.
Created a simple ASP.NET application using Visual Studio 2015 and trying to connect to the SQL server Database which is on on-prem. And modified the connection String as follows
<connectionStrings>
<add name="DefaultConnection"
connectionString="Data Source=PRAVEEN,1433; User ID=sa; Password=my_password;"
providerName="System.Data.SqlClient" />
</connectionStrings>
When the application is started its running without any errors as shown in below screenshot1.
But when I try register (enter any record) it throws me with an error as specified in the below Screenshot3....
"https://azure.microsoft.com/en-us/documentation/articles/web-sites-hybrid-connection-connect-on-premises-sql-server/" - this is the documentation to which I'm referring to..
So, can anyone from the other end help me out please...
Microsoft SQL Server Management Studio screenshot....
Thank you..
#Praveen,
It is what it says - meaning Initial Catalog is missing in your connection string. It requires the Db name to connect to. You have the servername, SQLUserName, SQLPassword, but missing the DatabaseName it requires. Please change your connection string to include the the DbName as follows
<connectionStrings>
<add name="DefaultConnection"
connectionString="Data Source=YourServerName,1433;Database="YourDbName" UserID=YourId;Password=YourPswd;"
providerName="System.Data.SqlClient" />
</connectionStrings>
Look at this site to configure your connection string appropriately: http://www.connectionstrings.com/store-connection-string-in-webconfig/
The client application and the sql server instance are on separate machines. I'm working with Entity Framework and have created the Data Model for the database. Locally the application works fine with the database. But after the application has been deployed on IIS, I cannot access to the database. I'm getting the error message:
The underlying provider failed on Open.
Login failed for user 'domain\account'.
In the Web.config of the WebAPI is the connectionString defined as follows:
<system.web>
<compilation debug="true" targetFramework="4.5" />
<httpRuntime targetFramework="4.5" />
<authentication mode="Windows" />
</system.web>
<entityFramework>
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
<parameters>
<parameter value="mssqllocaldb" />
</parameters>
</defaultConnectionFactory>
<providers>
<provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
</providers>
</entityFramework>
<connectionStrings>
<add name="QuReContext" connectionString="metadata=res://*/Models.QuReModel.csdl|res://*/Models.QuReModel.ssdl|res://*/Models.QuReModel.msl;provider=System.Data.SqlClient;provider connection string="data source=spartak,2500;initial catalog=First_DB;User Id=domain\account;Password=MyPW;MultipleActiveResultSets=True;"" providerName="System.Data.EntityClient" />
</connectionStrings>
I've tried many kinds of solutions from threads in stackoverflow. But nothing has helped. I'm using the ASP.NET WebAPI 2, the Entity Framework 6, IIS 7.5 on a remote Webserver with Windows Server 2008 R2 and the SQL Server 2014 where my domain account is defined for access the database. This domain account I've written in the connection string of Web.config.
On IIS is created in Default Web Site "MyClientApp" and in this application is an extra application "RestApi" available. The Application Pool is defined as follows: Identity: ApplicationPoolIdentity, Managed Pipeline Mode: Integrated, Under the authentication of the application "RestApi" is just Windows authentication and basic authentication enabled.
Do anyone has an idea?
You can set up SQL Server to support two authentication modes:
Integrated (Windows) security
Mixed (Windows + SQL Server logins)
The first mode uses the current user credentials to try to login in SQL Server. In this case, the credentials are the ones from the process running the ASP.NET application, in other words, the app pool user. To specify this kind of login you need to include this in your connection string: Integrated Security=SSPI. (I've seen on some occassions that, apart from specifying integrated security, people specify user and password, but I'm not sure if you can override the current user credentials. In fact, I think that only worked in Windows CE).
The second mode supports integrated security, and also SQL Server logins, where the user and passwords are managed by SQL Server itself, and have nothing to do with Windows users and passwords. To authenticate a SQL Server login you must specify the user ID and password as you're doing in your query string: User Id=myUsername; Password=myPassword;
You should read about integrated and mixed security mode in SQL Server. This is quite an old information, but still applies.
I cannot connect to SQL Server database.
When I run the aspnet_regsql.exe utility, I get the following error message:
Setup failed.
Exception:
Unable to connect to SQL Server database.
Details of failure
System.Web.HttpException: Unable to connect to SQL Server database. ---> 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: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)
Also, I am unable to use the ASP.NET Website Administration Tool. When I click on the Security tab I receive the following error:
There is a problem with your selected data store. This can be caused by an invalid server name or credentials, or by insufficient permission. It can also be caused by the role manager feature not being enabled. Click the button below to be redirected to a page where you can choose a new data store.
The following message may help in diagnosing the problem: Unable to connect to SQL Server database.
So, I click on the 'Choose Data Store' button as instructed, which allows me to select a a Provider. The provider is named 'AspNetSqlProvider', it has a Test link beside it. I click on Test and receive the following error message:
Could not establish a connection to the database.
If you have not yet created the SQL Server database, exit the Web Site Administration tool, use the aspnet_regsql command-line utility to create and configure the database, and then return to this tool to set the provider.
I have lost overtime for this problem, but i cannot fix it. I hope everybody can help me.
I look forward receive the good answer as soon as possible. Sincerely thanking you very much for your help.
I encounter the same problem in my ASP.NET MVC project as you, when using the ASP.NET Website Administration Tool. The solution is to check and modify your web.config file. I just change the following attributes (add a field):
1) from
<profile>
<providers>...</providers>
to
<profile defaultProvider="DefaultProfileProvider">
<providers>...</providers>
2) from
<membership>
<providers>...</providers>
to
<membership defaultProvider="DefaultMembershipProvider">
<providers>...</providers>
3) from
<roleManager>
<providers>...</providers>
to
<roleManager defaultProvider="DefaultRoleProvider">
<providers>...</providers>
And, be sure to have something like:
<connectionStrings>
<add name="DefaultConnection" providerName="System.Data.SqlClient" connectionString="Data Source=(LocalDb)\v11.0;Initial Catalog=aspnet-MvcApplication1-20160111151822;Integrated Security=SSPI;AttachDBFilename=|DataDirectory|\aspnet-MvcApplication1-20160111151822.mdf" />
</connectionStrings>
and the "DefaultConnection" has a corresponding field connectionStringName="DefaultConnection" under <profile>,<memebership>and <roleManager> tags, which are modified as stated above.
If you still have problems in your MVC project, just create a new full ASP.NET MVC Web Application template, compare the web.config file with yours, and modify your web.config file.
So I have few ASP.NET apps all running off SQL Server Express 2008 and working fine and dandy. I just put up a new one to test something and am now getting the Error 26 - can't find instance. What's weird is that the app is talking to the DB partially because it brings up the user login page and if I enter wrong data it returns a message about that (which is good). When I enter the correct login info it takes it then thinks for a few seconds and then throws the Error 26.
Here is my connection string --
<connectionStrings>
<add name="db_BPEntities" connectionString="metadata=res://*/App_Code.Data.db_BP.csdl|res://*/App_Code.Data.db_BP.ssdl|res://*/App_Code.Data.db_BP.msl;provider=System.Data.SqlClient;provider connection string="data source=LOCALHOST\SQLEXPRESS;initial catalog=db_BC_Build;user id=USER;password=PASSWORD;multipleactiveresultsets=True;App=EntityFramework"" providerName="System.Data.EntityClient" />
<add name="Default" connectionString="server=LOCALHOST\SQLEXPRESS;database=db_BC_Build;USER ID=USER;password=PASSWORD;Min Pool Size=10;Max Pool Size=800;Network Library=dbmssocn" providerName="System.Data.SqlClient" />
</connectionStrings>
Note: I've changed user/password info. The DB is running locally off the same box with IIS (it's a test intranet site so I'm ok with that for now).
So summary:
Other apps running off same DB have zero connectivity issues. They all connect and work fine.
This app partially works but on login throws the Error 26 - Instance not found.
Would it be that there are 2 connection strings here vs 1 connection string on my other DBs?
Really stumped.
Thanks for any/all help :)
Edit: I think the issue is with the Entity Framework and SQL Server Express. It seems to connect initially to authenticate the user, but then the EF connectivity to display data, etc is where it breaks. That's where I'm at right now and stuck in trying to figure this out (I didn't develop this application).
Try to connect without "Network Library=dbmssocn" in your connectionstring. I have had the same (error 26) issue and it did work for me.
I change app config file to this
<connectionStrings>
<!-- TLPL_ICT_OPR\MSSQLSERVER1;Initial Catalog=FMS;User ID=fms -->
<add name="DBConnectionString" connectionString="user id=fms;data source=TLPL_ICT_OPR\MSSQLSER;persist security info=True;initial catalog=username;password=password" providerName="System.Data.SqlClient"/>
<!--<add name="DBConnectionString" connectionString="user id=fms;data source=TLPL_ICT_PHOLIB\SQLEXPRESS;persist security info=True;initial catalog=FMS;password=fms4321"
providerName="System.Data.SqlClient" />-->
</connectionStrings>
<startup>
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/>
</startup>
after this it works fine....
To quote from SQL Network Interfaces, error: 26, these are the steps to overcome this issue:
Make sure your server name is correct, e.g., no typo on the name.
Make sure your instance name is correct and there is actually
such an instance on your target machine. [Update: Some application
converts \\ to \. If you are not sure about your application, please
try both Server\Instance and Server\\Instance in your connection
string]
Make sure the server machine is reachable, e.g, DNS can be
resolve correctly, you are able to ping the server (not always
true).
Make sure SQL Browser service is running on the server.
If firewall is enabled on the server, you need to put
sqlbrowser.exe and/or UDP port 1434 into exception.
Please visit the link for more detail.