Visual Studio :: Errors While Trying To Run Web Application - Unable To Connect To Development Server
Sep 29, 2010
I got these errors while trying to run a web application using vs 2008, The first error is this: >Application has generated an exception that could not be handled. >process ID=0x1130 (4400), Thread ID=0xe6c (3692). And when I press OK a second dialog reports this error:>unable to connect to the asp.net development server. I reinstalled, repaired and re registered msdbg2.dll and edited hosts file but still get this error. I need to debug an application but I can't. This error is on a 'Win 2003 server enrterprise service pack 1' with a vs2008 team system installation. What can I do to remove this error and run and debug my application?
I'm getting this problem with one of my web projects. I've looked at [URL] and other suggestions around the place, none of which apply here. The odd thing is, it's occurring with *one* of my new web site projects, but not another one. Odd again is that they're both 100% fresh sites, created with the "New Web Site" option in the File menu, within a day of each other, and nothing has been done to them, apart from a bit of "hello world" html. WebSite1 was created first, and Cassini worked when I first created it the other day. A day later, I created WebSite2 and Cassini worked (and still works) with that one.
However, when I open WebSite1, I get the above error code - again, it was working fine the other day, and WebSite2 works fine. I've compared their .sln file - so differences apart from the VWDPort number used, and of course the path to the site and various GUIDs. Everything else is identical. Same with comparing web.config files. No differences there at all. So I'm stumped - why would Cassini start up fine with WebSite2 (and subsequent sites I create) but suddenly stop working for the WebSite1 project, when it was working ok a couple of days ago?
Not too long ago I was given a new PC with windows 7 Professional on it. Before, I had vs 2008 running on win xp which worked OK. I started getting error msg (Unable to connect to ASP.NET development server) after I installed vs 2008 (version 9.0.30729.1 sp1 vs team system dev. edition) and ran one of my projects and even a simple test project. The first msg shows the syntax of webdev.webserver with an example in the bottom. I can get this error by running the project or by showing any page in the browser. I noticed that file WebDev.WebServer.EXE does not appear in the folder C:WindowsMicrosoft.NETFrameworkv3.5. If that's the only reason why I am having this problem than how can I fix it. I was told that .net framework 3.5 works on top of .net framework 2.0?! I just want to sort out this .net framework mess on my new machine. I am willing to uninstall all .net framework and start fresh. Another thing that I am willing to try is to get from a coworker the WebDev.WebServer.EXE (from the .net framework 3.5 folder) and see if it works.
I have VS 2008 with SP1 installed on Win XP. I have .NET 3.5 with SP1 installed When I ran and opened an existing project for the first time, I got the below error WebDev.WebServer.exe has encountered a problem and needs to close. After this error, I continusly get "Unable to connect to the ASP.NET Development Server. whenever I run the website. I checked the internet and ASP.NET forum and tried all the following Making port numbers auto assign Making it to a specific port number using the Custom web server Tried creating new web site and checking Replaced WebDev.WebServer.EXE after downloading it from a website My anti virus have not blocked any websites as such I tried resetting VS settings by running devenv /resetsettings what else might be the problem?
I developed a website project using visual studio 2008 and language used is c#. It was working fine till yesterday[i.e., It compiled and also i could run it using the asp.net development server by pressing ctrl+f5] and today when i tried to run it says "unable to connect to asp.net development server". I tried to reinstall visual studion 2008 and even now its not working. Also when i go to websites n asp.net configuration option it say the same error "unable to connect to asp.net development server". I absolutely no idea about why this error popped up. I got my project demo. day after n how can this be set right.
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.
I have a Web App (VS 2010 Beta 2, using VB) and it works flawlessly on the development system. When I publish it, everything works fine unless I use an update panel. If I use the update panel, and try to use something such as a dragpanel, I get the following error.
Webpage error details
User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; WOW64; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; InfoPath.2; .NET4.0C; .NET4.0E) Timestamp: Thu, 4 Mar 2010 14:54:25 UTC
Message: Sys.WebForms.PageRequestManagerServerErrorException: An unknown error occurred while processing the request on the server. The status code returned from the server was: 404
I'm getting "Cannot connect to ASP.NET development server" almost every time I stop the ASP.NET server before restarting the project in debug mode. It can take between 15 seconds and 2 minutes to get the error message, and Visual Studio is frozen.
Sometimes I get three in a row, and I have to wait 2 minutes each time, or go into Task Manager and kill to process. Then I have to start Visual Studio 2010 again, which is at least three times slower than Visual Studio 2008 to open.
It's *extremely* annoying. I know I don't have to close the server if the code has changed, but sometimes I simply want to restart my website in debug mode (there is a cache on most web service calls, so this clears the cache). A workaround is to add "foo" code to a class and restart the project.
I'm running Visual Studio 2010 Professional on Windows Server 2008. I'm running the Visual Studio Power Tools too, with the latest update.
I am using an Visual studio 2010 ultimate edition. And here i have getting an error " unable to connect to the asp.net development server " while i try to run the Web Application by pressing F5 key from Web Application Project. Can any tell me whats the problem and how can i resolve it.
Whenever i run the project this problem occur Can any one give me solution. should i have to delete webdev.webserver.exe and install another is this the right solution for my problem.
i was working asp.net 3.5 (VS2008) . till yesterday My asp development server was working but today it is giving error " Unable to connect ASP.Net Development Server"
i have sql server 2008 and visual studia 2008 install in my system when i open a new website project and then use the asp.net administration tool in that when i go for security tab under that one.
i want to enable roles but it displaying error that unable to connect to sql server database.
I just finished upgrading my vista to 7 and with some problems and one of them is every time I open my file and tried to debug it or run in browser, I always get a warning saying = Unable to connect to the ASP.NET Development Server I thought some problems when I upgrade so I reinstall the software but no luck
I recently purchased a new computer running Windows 7 Home, and after installing Visual Studio 2005 and SQL Server 2005 Express, I am unable to connect to the database using the "Connect To Database" wizard. I get the following error:
"This server version is not supported. You must have Microsoft SQL Server 2005 Beta 2 or later."
The version of SQL Server 2005 Express I've downloaded is directly from the Microsoft site and I also downloaded the SP3 to be used with Windows 7, x64 (which I presumed was a later version of the database). I am able to connect to the database programatically, but I would like to get the wizard functionality working as well (as I am unable to add a database to my projects, using the "Add New Item" wizard either).
I have a clean installation of Windows 7 with VS2010 RTM and am trying to get the ASP.NET Development Server to work. When I run the project, the WebDev server starts and shows that it's listening on port x on localhost. I've tried:telnet to the port. The port is not listening. running netstat -o shows that the WebDev server is in fact not listening on any port. manually changing the WebDev port to a different port and restarted VS without effect. I have Windows Firewall turned off entirely and am not running any other firewall software either.
I am developing a single web application that will dynamically change its content depending on which domain name is used to reach the site. Multiple domains will point to the same application. I wish to use the following code (or something close) to detect the domain name and perform the customizations:
[code]....
I would like to test the functionality of the above using the ASP.NET development server. I created mappings in the local HOSTS file to map [URL] to 127.0.0.1, and [URL] to 127.0.0.1. I then browse to the application with the browser using [URL] (etc).
When I try to test this code using the ASP.net development server the [URL] always says localhost. It does NOT capture the host entered in the browser, only localhost.
Is there a way to test the URL detection functionality using the development server?
I have Oracle 10G express edition. I have configured it on windows 7 system. Now I want to make a 64 bit application using visual studio 2010 and connect to oracle 10 g server. If I run my application in VS2010 explecitly in 86 mode then I am connected to database but I want it to happen for 64 bit
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...
I have installed visual studio 2010, but I got some problem in connecting to my sql2005.
Whenever after I choose the Server name and database name for new connection, it shows a message that unable to add data connection.
Could not load file or assembly 'Microsoft.SqlServer.Management.Sdk.Sfc, Version= 10.0.0.0, Culture=nertral, PublicKey=89845dcd8080cc91' or one of its dependencies. The system cannot find the file specified.
I am developing a web application in which I am suddenly facing an issue. I have a webpage which contains many controls, one of the control is JQuery color picker. Now, I am upgrading my system with telerik controls. As part of this process, I replaced textbox(txtcolor) with radcolorpicker with a different id(colorPicker). Suddenly, my code behind file is not throwing any errors like 'unable to find txtColor'. It is running successfully without build errors. But, when I open the page, system is throwing runtime exception(txtColor not found) which is correct.
I tried to change other controls with asp.net controls, still the problem persists. So, I dont think it is anything to do with telerik.
I used the ASP.net Web Site Administration tool to create a database with two users and two roles. The database created successfully and is showing up in Solution Explorer in the App_Data folder of my project, as expected. The problem is, that when I click on the database I get an error message saying that "SQL Server database files (.mdf) require SQL Server 2005 Express or SQL Server 2008 Express to be installed and running on the local computer." I, in fact, have 3 versions of SQL Server running on my computer. SQL Server Express (default instance), SQL Server Express (named instance for Outlook 2010 Business Contact Manager), and SQL Server 2008 R2 (Developer Edition). If I create a new connection in Server Explorer and then attach the database file, it attaches fine. It's only in Solution Explorer that it somehow is not connecting.
In Visual Web Developer-2010, I have been trying to connect to IBM DB2 Database after installing the DB2 9.7 client (both supports VS2010/.Net4) so that I can use "ADO.NET Entity Data Model", but while clicking "New Connection" I can only see the list of Data Sources and Data Provider only related to MS SQL server. This is totally blocking my work, I am not able to work further since I cannot even establish the connection to my db2 database using this new editor so that I can create the edmx files in the solution for non MSSQL databases. Kindly provide me the solution ASAP, since my further work is blocking due to this.
