Connection Error - Development Server - Default Browser (IE8 - Flock2.6)
Oct 16, 2010
I installed windows 7 recently & I am new to ASP.NET. I installed visual studio 2008 for developing ASP.NET application. I created my web application on visual web developer 2008 & when I run my aplication, ASP.NET development server runs & my defualt browser opens automatically but it cannot show my web page. Connection error ocurrs. But when I open this web page with visual studio's internal browser, it works fine for me. So tell me whats the problem with my default browser(IE8, Flock2.6), Any configuration setting or what, I don't know exactly.
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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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Jan 29, 2010
It is about the efficiency, which chrome being light weight, fine for general web browsingI am thinking to use it as default browser when working on Web Applications. There are some limitation though which I know like, Could not use chrome when worked over an Rss Feed generator module, as chrome was not supporting the generated output.Which browser will make it a good combination with VS 2008, C#, Asp.Net dev Server for developing Asp.Net Web Applications.
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Oct 16, 2010
I installed windows 7 recently & I am new to ASP.NET. I installed visual studio 2008 for developing ASP.NET application. I created my web application on visual web developer 2008 & when I run my aplication, ASP.NET development server runs & my defualt browser opens automatically but it cannot show my web page. Connection error ocurrs. But when I open this web page with visual studio's internal browser, it works fine for me. So tell me whats the problem with my default browser(IE8, Flock2.6), Any configuration setting or what, I don't know exactly.
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Dec 5, 2010
I created the simplest MVC project with Visual Studio 10, and it works fine on the VS Development Server, but won't run using IIS on the same computer under IIS (Windows Server 2008 R2 with ASP.NET 4.0.30319).
My steps were:
File / New / Project ...Visual C# / Web / ASP.NET MVC 2 Web Application... and kept the default name: MvcApplication1
Clicked Debug to build and run ... the default page appears fine at http://localhost:49175 ...
Then I closed that browser and clicked on MvcApplication1 / Properties / Web and selected "Use Local IIS Web server"Clicked "Create" to create the virtual directory at http://localhost/MvcApplication1
Clicked Debug again... and got HTTP Error 403.14 (Web Server configured to not list directory)
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Why can ASP.NET find the default document (Views/Home/Index.aspx) when running from the VS Development Server, but not when running from IIS??
I have tried running "aspnet_regiis -i", but still find that C:inetpubwwwrootaspnet_clientsystem_web4_0_30319 is an empty folder. Should there be something here?I have tried giving all sorts of permissions to the virtual directory folder (C:inetpubwwwrootMvcApplication1) but without any success.
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Jun 13, 2012
I defined a default error page in the ASP.Net Web Site Administration tool. The page exists in root directory. I also confirmed that it pointed to my frmErrorPage.aspx by looking in my Web.config file
Code:
<system.web>
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Code:
Server Error in '/' Application.
The resource cannot be found.
Description: HTTP 404. ...
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Sep 30, 2010
I have VS 2010 professional. I am trying to open "ASP.Net Configuration" through Project -> ASP.Net Configuration.
It pops up the Notification about the ASP.Net Development Server localhost but doesn't open ASP.Net Configuration in the default browser.I clicked on the Root Url (by double clicking on the 'development server' at the right bottom from Notification Manager).
It throws following error
"An error was encountered. Please return to the previous page and try again."
Clicking on "How do i use this tool".It opened page with error.
Tool Has Timed Out
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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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Aug 15, 2010
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<connectionStrings>
<add name="ApplicationServices"
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providerName="System.Data.SqlClient" />
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Jul 4, 2013
In my application there are 4 connection strings...from that i want one connectionstring should be default connection string.How to do ?
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Sep 1, 2010
I have a .Net 2 solution with some asp classic pages.I get a specified cast is not valid error when I access the page on my local. Below is the vb function where I get the Error:
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May 7, 2015
When I press f5 to run my website a prompt message appears displaying unable to connect to asp.net development server. I have tried to restart vs 2010 but that did not work...
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Sep 13, 2010
I'm using Visual Studio 2008, and my database is SQL Server 2000.
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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.
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<add name="cn"
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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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Feb 28, 2010
i get 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: TCP Provider, error: 0 - No connection could be made because the target machine actively refused it.)
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Jun 16, 2010
I wrote a web service to send emails and some win apps supossed to call the service for sending emails. When I test the service via Visual studio development server everything is ok and it sends emails. But with IIS the smtpclient.send throw an exception whit this message : No connection could be made because the target machine actively refused it [mailserver ip:port] The endpoint for VS development server is [URL] and for iis [URL] The smtp server is remote (gmail) and iis version is 6. I set the current local user as iis anonymous user. I am in LAN and my client firewall is off. There is an ISA server for the internet but I'm using a dialup connection for the internet. So why visual studio can send emails but iis can't?
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Mar 16, 2011
I have an ASP.NET site running on the Visual Studio Development Server. I also have a silverlight project in my solution. I get the error:
Error: Unhandled Error in Silverlight Application
Code: 2104
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May 17, 2010
I just started getting the error message "Unable to Connect to the ASP.net Development Server" when debugging a website with VWD 2008 (everything was fine in the past). My system is Windows Vista with Windows Live OneCare firewall. I have reviewed other postings related to this problem, and they indicate firewall setting problems - settings not allowing VWD internet access. However, my settings on the "Windows Live OneCare Firewall Advanced Settings" tab specifically allow VWD.
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Mar 5, 2010
Not sure why it works if i connect to SQL 2005 on another server, but now that i have SQL Express on the same server as the pages, im getting the following error: I have attached my connection string within my web.config and also how its being called within the code behind. Now this page was written by another programmer some time back.. so not sure if the method he used to do this is the best or only way. But i have connected to other SQL database with other applications with alot less code.
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)
Source Error: Line 131:
Line 132: //connect to this sql server
Line 133: c.Open(); -----> this is the line it complains about.[Code]....
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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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Feb 18, 2011
I am facing a strange problem .can't figure this out.my web site's all pages are running fine except home page.i got this error
An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: Named Pipes Provider,error: 40 - Could not open a connection to SQL Server)
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Oct 7, 2010
I was able to publish a web application with many projects inside it and which connects to oracle databasenow, I put it on remorte IIS 2003 server but it gave this error that has to do with aspnetdb fileA 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)and then I tried it on my local windows7 IIS local host and I got this error 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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Oct 13, 2010
Everything was working fine yesterday afternoon before going home.. shut down with no issues and this morning when i try to open SQL i get error message with the following, im on a deadline with this project and cant afford to lose what i have setup already. Is there anything i can do to correct whatever issues there may be?
TITLE: Connect to Server
------------------------------
Cannot connect to local.
------------------------------
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: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified) (Microsoft SQL Server, Error: -1)
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