I'm receiving the following error occasionally when calling web service using a .NET 4.0 web application."The underlying connection was closed: An unexpected error occurred on a send."All of the articles I've read regarding this issue are for the Framework 1.1.Is there any solution to this issue for using .NET framework 4.0?
View 1 RepliesI am consuming a third party web service wsdl using my .net aps.net page. And I am getting following error message. Cannt get to resolve it. Its working on my machine but not in my development machine. I have installed the certificate also in certificates on that machine.
Error --> The underlying connection was closed: An unexpected error occurred on a send.
I have a WCF service which has 4 Operation contracts.
I have added a new contract and it gets the data from database and returns the result set.
I can access the new contract and the service get the correct result set. But while passing the result set to the client I get the error of The underlying connection was closed: The connection was closed unexpectedly.
What are the steps to follow after adding a new contract like new binding etc.
This error stopping my work in my crucial time. The error is "The underlying connection was closed: The connection was closed unexpectedly.".There are multiple WCF service I created in my project. But when I am requesting only one service this error is coming. I compare with other service, no difference. The service works fine in the morning, but afternoon it stops working and raising error.
I installed Silverlight 3.0 Tools for 2008 Sp1, Silverlight 3.0 Developer, WCF RIA Beta and Silverlight 4.0 runtime in my system in the morning. After getting this error I uninstalled WCF RIA Beta. But same issue.Could not find any solution. Please assist me how to solve this issue.
when I make data source configuration wizerd
Data -> Add new data source -> ... -> Save the connection string to the Application configuration file (yes, save the connection) result in "An unexpected error has occured." Error Message; Could not load type
'Microsoft.VisualStudio.DataDesign.SyncDesigner.SyncFacade.SyncManager'from assembly 'Microsoft.VisualStudio.DataDesign.SyncDesigner.DslPackage,Version=9.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'.
how I can solve this problem ?
Some of our users get following error while browsing application :
Error loading postback data: System.Xml.XmlException: Unexpected end of file has occurred. The following elements are not closed. Anyone knows why this error get fires?
I have created a webservice in 2010. And when I call it from my web application sometimes,It generates the follwoing errors:-1. The underlying connection was closed: A connection that was expected to be kept alive was closed by the server.2. Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding.I have already tried increasing excutonTimeOut etc.
View 2 RepliesIn MOSS 2007, we could update the tag's callstack attribute to true and then customerrors mode to "Off" to see the actual error behind the 'An unexpected error has occurred' message. Does it apply on SharePoint 2010 as well ? I tried it but I get the following error:
Runtime Error Description: An application error occurred on the server. The current custom error settings for this application prevent the details of the application error from being viewed.
Details: To enable the details of this specific error message to be viewable on the local server machine, create a tag within a "web.config" configuration file located in the root direc...
I have my wcf service and it runs fine. Then from my asp.net application I am trying to connect to this service. Everything is ok, request from asp.net is received in service (as I can debug code) and then when it returns to client I have the following error:underlying connection was closed: The connection was closed unexpectedlyMy contract on WCF service is as follows:
[OperationContract()]
WCFResponseGetAllProducts GetAllProducts(WCFRequestGetAllProducts request);
And WCFResponseGetAllProducts , WCFRequestGetAllProducts classes have [DataContract] attributes. Members of those classes have [DataMember] attribute. However when I added another method to my contract:
[OperationContract()]
int Test();
then I can execute it from asp.net mvc application without a problem.
PS. I host my wcf service in default web server in visual studio 2010 at the moment
I'm using Visual Studio 2008, and my database is SQL Server 2000.
I want to add a connection to the Server Explorer in VS. The Data source is Microsoft SQL Server (SqlClient). After entering in all my information and I click Test Connection, it is successful.
But when I click OK, I get the error:
Unable to add data connection. ExecuteScalar requires an open and available connection. The connection's current state is closed.
I have application developed in vs 2005, when i try to run it throws below error.
"Unable to start debugging on the web server. The underlying connection was closed: An unexpected error occurred on a send."
Im working with this Arquitecture : Web Service -> DLL(Xml Translator) -> Asp.net.Everything works fine, but,i have a process that takes about 23 minutes, in that time i show a "loading screen" that avoid the user to do anything, but after 20 mins while the web service is working and after debug my code, i get this error :
"The underlying connection was closed: The connection was closed unexpectedly"
Then, my "loading screen" keep visible until the web service completes the work, and after that, the "loading" hides and the web form shows my gridview empty.(its should show data).
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?
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.
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.)
View 4 RepliesI 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.
I'm getting the "The underlying connection was closed: The connection was closed unexpectedly." error while trying to POST using the HttpWebRequest class on the production server, on my dev machine it works fine.
I originally tried using the WebClient class but I switched to the HttpWebRequest to try some of the suggestions I found while researching the issue (such as setting KeepAlive to false, PreAuthenticate true and ProtocolVersion to 1.0).
Since it's only happening on the production server, i'm guessing that it might have something to do with IIS.
Here's my code
[Code]....
If set the Target Framework (I used a new project for testing) to 2.0 (I didn't test every version of the framework) it works. I'm guessing that .net handles the security differently in .net 4.0.
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:
- Dev environment is vwd express 2010 with sqlite mdf attached
- Test environment is windows 7 server, iis 7 with appdomain identity set to network service
i am using paging technique from this tutorial [URL] and it is working fine, i used asp.net 2.0 with sql server 2005 then i upgraded to visual studio 2008, and converted the asp.net 2.0 application to 3.0 and now using sql server 2008 all the existingpages and .xsd files are working, fine, i can see data in .xsd files when i preview it but i cannot add new stored procedures it gives me an error "An unexpected error has occured" Error message:unexpected error i dont know what it is, already configured dataset (.xsd) works fine, it is just that iam unable to add stored procedures to new datasets my connection string
<add name="jobcon" connectionString="Server=HOME-46CTBUROCXSQLEXPRESS; Database=jobdhundo; User ID=; Password=;Timeout=200; Trusted_Connection=True" providerName="System.Data.SqlClient"/>
it is fine with the entire application there is no coding involved
This is happening only in my system. when i do a build it just works fine but when i try to debug the service i am getting the follwoing error. please let me konw what would be theissue.
Microsoft.Practices.RecipeFramework.ActionExecutionException: An exception occurred during the binding of reference or execution of recipe DebugWCFService. Error was: Action DebugWebProject failed to execute:
Value does not fall within the expected range..
You can remove the reference to this recipe through the Guidance Package Manager. ---> System.ArgumentException: Value does not fall within the expected range.
at EnvDTE.Properties.Item(Object index)
at Microsoft.Practices.RecipeFramework.Extensions.Actions.VisualStudio.DebugWebProjectAction.Execute()
at Microsoft.Practices.RecipeFramework.Recipe.Microsoft.Practices.RecipeFramework.Services.IActionExecutionService.Execute(String actionName, Dictionary`2 inputValues)
at Microsoft.Practices.RecipeFramework.Recipe.Microsoft.Practices.RecipeFramework.Services.IActionExecutionService.Execute(String actionName)
at Microsoft.Practices.RecipeFramework.Recipe.Microsoft.Practices.RecipeFramework.Services.IActionCoordinationService.Run(Dictionary`2 declaredActions, XmlElement coordinationData)
at Microsoft.Practices.RecipeFramework.Recipe.ExecuteActions(IDictionaryService readOnlyArguments, IDictionaryService arguments, ITypeResolutionService resolution)
--- End of inner exception stack trace ---
at Microsoft.Practices.RecipeFramework.Recipe.UndoExecutedActionsAndRethrow(Exception ex)
at Microsoft.Practices.RecipeFramework.Recipe.ExecuteActions(IDictionaryService readOnlyArguments, IDictionaryService arguments, ITypeResolutionService resolution)
at Microsoft.Practices.RecipeFramework.Recipe.Execute(Boolean allowSuspend)
at Microsoft.Practices.RecipeFramework.GuidancePackage.Execute(String recipe, IAssetReference reference, IDictionary arguments)
at Microsoft.Practices.RecipeFramework.GuidancePackage.Execute(IAssetReference reference)
at Microsoft.Practices.RecipeFramework.RecipeReference.OnExecute()
at Microsoft.Practices.RecipeFramework.AssetReference.Execute()
at Microsoft.Practices.RecipeFramework.VisualStudio.RecipeMenuCommand.OnExec()
at Microsoft.Practices.RecipeFramework.VisualStudio.AssetMenuCommand.Invoke()
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)
I'm getting a lot of these error messages in my logs on one of my servers and intermittently on two others.Googling didn't reveal very much information, mostly related to file uploads or downloads being interrupted. My pages are basically just text files with "ok" in them that only have .aspx extension for future plans, there's no actual code powering the pages. Servers are all Windows Server 2008 RC2 x64 running IIS7 / ASP.NET 4.Statistically it's happening well under 1% of the time but because of the volume of traffic that still clutters my event log with 2 or 3 of these messages per minute.Edit:tracked down the problem, setting buffering to true stopped it occurring.
View 2 Repliesi m running asp.net example code in my vs 2005. I am using following datasource. I have no sql express edition, but i have developer edition of sql server 2005.
[code]...
i have .mdf file and i got following error message.
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)
{"Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host."}
I get the above error when sending email...
I have an appliaction that works fine and connect to the database.but when view the event log I can see that every minute I get this:
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: Shared Memory Provider, error: 40 - Could not open a connection to SQL Server)
On web.config yo can find:
[Code]....