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Dbnetlib Connectionopen (connect()). Specified Sql Server Not Found

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Sql Server Does Not Exist Or Access Denied 2012

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Dbnetlib Connectionopen (preloginhandshake()). General Network Error

or access denied. Posted by Sean Syed on 23 February 2013 05:06 PM If you get the following error, while trying https://support.microsoft.com/en-us/kb/888228 to access MS-SQL server, "Error: Test connection to the database server has failed because of network problems:[DBNETLIB][ConnectionOpen (Connect()).]SQL Server does not exist or access denied." Follow the steps mentioned below. 1. Login to the server >> Start >> All Programs >> Microsoft https://www.teamdotnetnuke.com/index.php?/Knowledgebase/Article/View/245/20/dbnetlibconnectionopen-connectsql-server-does-not-exist-or-access-denied SQL Server >> Configuration Tools >> SQL Server Configuration Manager >> SQL Server Network Configuration >> Protocols for MSSQLSERVER >> right click “TCP/IP” and select “Enable”. 2. Start >> Run >> type “services.msc” >> Restart SQL service. Now you can access MS-SQL server. (238 vote(s)) Helpful Not helpful Comments (4) Reply NicolasP 20 September 2013 12:12 AM Awesome! Thank you! Reply gani 13 October 2013 05:09 AM awesome buddy Reply Ram 16 March 2014 02:36 PM Thaarmaar... :) Reply Gilfanz 14 May 2014 11:35 PM Commentum thaarmaar!!! Post a new commentReply to comment Full Name: Email: Comments: CAPTCHA Verification Please enter the text you see in the image into the textbox below (we use this to prevent automated submissions). Help Desk Software by Kayako

Get Your Own Blog If you would like to blog on SQLServerCentral.com then send an email to webmaster@sqlservercentral.com. Contact the author Please log in or register to contact the author of this http://www.sqlservercentral.com/blogs/whatilearntatwork/2012/01/16/sql-server-connectivity-error-sql-server-does-not-exist-or-access-denied/ blog All Blogs All Bloggers on SQL Server Central Feeds Subscribe to this blog Archives http://stackoverflow.com/questions/5460659/c-sharp-sqlcommand-connection-open-issue for this blog July 2013 November 2012 May 2012 March 2012 February 2012 January 2012 December 2011 November 2011 October 2011 September 2011 August 2011 July 2011 June 2011 May 2011 April 2011 March 2011 February 2011 January 2011 What I Learnt @ Work SQL SERVER connectivity error: SQL Server does not exist or access denied Posted on 16 dbnetlib connectionopen January 2012 Comments Briefcase Print Recently I was troubleshooting a connectivity issue in a development environment from an application. The application was using the connection string as "Provider=sqloledb;Data Source=myserver\instance1,1433;Network=DBMSSOCN;Initial Catalog=mydb;Integrated Security=SSPI;" I was able to connect to the SQL SERVER from SSMS, however when connecting from an application it was throwing the error [DBNETLIB][ConnectionOpen (Connect()).]SQL Server does not exist or access denied This is very generic one and can happen due to dbnetlib connectionopen (connect()) many reasons like (1) Account may not have access or password might be wrong (2) Connection might be blocked by a firewall (3) Since it is a named instance, the port might be different. In some cases it might be dynamic also, for which the SQL Server Browser service should be up and running. Looking at the connection string, everything looked good except for the "Network". I had no idea of what it is. Googling led me to this KB article from Microsoft which clearly explains what it is. Basically when an application is trying to connect to SQL SERVER, if one protocol fails then it tries to connect with another protocol. Example, assuming TCP/IP is enabled as primary and Named Pipes as secondary. When an application tries to connect to SQL SERVER, it first tries with TCP/IP. If that did not succeed, it tries with Named Pipes. If that also fails, then only it throws the error. However, we can force the application to use only one protocol and that is done by the "Network" keyword in the connection string. This article defines all the options available for "Network". In my case the option "DBMSSOCN" corresponds to TCP/IP and it was disabled in the development machine. Enabling it, using this article, fixed the issue. Comments Leave a comment o

here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up C# SqlCommand Connection.Open() issue up vote 3 down vote favorite 1 I have a C# ASP.NET web application an I am trying to populate an ASP:DropDownList with a column in a database table. My Code: using System; using System.Collections.Generic; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; using System.Data; using System.Data.SqlClient; using System.Configuration; using System.Web.Configuration; namespace CRM2Sage { public partial class SOPOrderEntry : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { Fill1(); } public void Fill1() { SqlCommand cmd = new SqlCommand("SELECT * FROM Products", new SqlConnection(WebConfigurationManager.AppSettings["CRM2Sage"])); //cmd.Connection.Open(); cmd.Connection.Open(); SqlDataReader ddlValues; ddlValues = cmd.ExecuteReader(); vproduct.DataSource = ddlValues; vproduct.DataValueField = "theName"; vproduct.DataTextField = "theName"; vproduct.DataBind(); cmd.Connection.Close(); cmd.Connection.Dispose(); } } } An when I run the page I get the following error The ConnectionString property has not been initialized. pointing to cmd.Connection.Open(); I can not understand why, the SQL connection is stored in my web.config file. The web.config