Databases
StackOverflow2013
Postsdbo
POHow to fix error "Named Pipes Provider, error: 40 - Could not open a connection to SQL Server"
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POHow to fix error "Named Pipes Provider, error: 40 - Could not open a connection to SQL Server"
    primarykey
    data
    text
    <p>So I'm trying to make a simple C# console app that simply queries a database - nothing more.</p> <p>However, I keep getting this error:</p> <blockquote> <p>An unhandled exception of type 'System.Data.SqlClient.SqlException' occurred in System.Data.dll</p> <p>Additional information: 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)</p> </blockquote> <p>Now, I've tried EVERYTHING! I've edited all my settings(added firewall exception, enabled TCP/IP, just about any solution you can find with a google search, I did). When I try to make a connection using SQL Management Studio using the same credentials that are in my connection string, everything works PERFECTLY. BUt for some reason, nothing works from Visual Studio.</p> <p>Here is my Connection String:</p> <pre><code>&lt;add name="Invoicing" connectionString="Data Source=server;Initial Catalog=Invoicing;Persist Security Info=True;ID=id;Password=pw" providerName="System.Data.SqlClient" /&gt; </code></pre> <p>Here is app:</p> <pre><code>class Program { public static void Main(string[] args) { Invoicing db = new Invoicing("Invoicing"); var q = from sin Invoice where s.Date == 201007 select s; foreach(var sin q) Console.WriteLine("{0}, {1}", s.CreateDate, s.EndDate); } } </code></pre> <p>Here is my stack trace:</p> <pre><code> at System.Data.ProviderBase.DbConnectionPool.GetConnection(DbConnection owningObject) at System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection) at System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory) at System.Data.SqlClient.SqlConnection.Open() at System.Data.Linq.SqlClient.SqlConnectionManager.UseConnection(IConnectionUser user) at System.Data.Linq.SqlClient.SqlProvider.get_IsSqlCe() at System.Data.Linq.SqlClient.SqlProvider.InitializeProviderMode() at System.Data.Linq.SqlClient.SqlProvider.System.Data.Linq.Provider.IProvider.GetQueryText(Expression query) at System.Data.Linq.DataQuery`1.ToString() </code></pre> <p>I created the DataContext using SqlMetal, if that matters.</p> <p>Also, I am using .Net 2008 and SQL 2008.</p> <p>Does anyone have any ideas on what to do?</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USKasaku
    1. USJames
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    3. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POHow to fix error "Named Pipes Provider, error: 40 - Could not open a connection to SQL Server"
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. POHow to fix error "Named Pipes Provider, error: 40 - Could not open a connection to SQL Server"
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. POHow to fix error "Named Pipes Provider, error: 40 - Could not open a connection to SQL Server"
      1. This table or related slice is empty.
      1. VTApproveEditSuggestion
    1. This table or related slice is empty.
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload