I am debugging codeplex simple project. I am using
- VSTS 2008
- Windows Vista x86 Enterprise.
I have not modified any code of this codeplex project, and just press F5 to run VideoPlayerWeb project.
The current issue I met with is error message —
Unable to connect to ASP.Net Development Server.
Here is my screen snapshots when clicking F5. Any ideas what is wrong?
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I had this problem with VS 2010, and it was as simple as terminating the “WebDev.WebServer40.EXE” process. Although the icon was no longer showing in the system tray, the process was still running.
Could be a number of things…try these (check the last one first)…
- Disable IPv6
- Make sure there isnt an edit in the
hosts file for localhost
- Check firewall/virus settings to allow connections to/from
- If you can preview in the browser
make sure the URL in the browser uses
the same port number as the port
number shown in the ASP.NET dev
server taskbar icon.
- Try setting a fixed, predefined port
in project properties
I got these from a couple of forums elsewhere, hopefully they can help. Good luck. Let us know what works and some more about your environment (firewall, anti virus etc) can help as well.
Under project settings, try specifying a different port like 64773 for example. I have encountered this issue many times and it has always worked for me.
It cause the already that project port server is running in the current thread. You need to end process using task manager.
Follow below step:
- Pres Ctrl+Alt+Delete (Task Manager)
find the asp.net server like
WebDev.WebServer40.exe for VS2010
and press end process.
Now u continue with vs2010 run
I went to the project file and changed the development server port to 1504. Well 1504 worked on another project for me, so I went with that. Hope this helps.
I have tried all of the above solutions and others from other websites too but with no luck.
What worked for me, was to rename or delete the applicationhost file:
C:UsersUserDocumentsIISExpressconfigapplicationhost < rename or delete.
That is very odd! I hate to suggest something as simple as restarting Visual Studio…but that is what sounds like the best first place to start. Also, check your project settings. As you said that you just downloaded this and tried to run it…perhaps the solution/project is not set up to use the Casini server that is shipped with Visual Studio?
Here are the steps
- ‘Website’ Menu in your visual studio ide.
- select ‘Start Options’
- enable ‘Use Custom Server’ radio button.
- Enter any URL you desire similar to ‘http://localhost:8010/MyApp‘
Note1: you can use any port number not only ‘8010’ but not designated port numbers like 8080(tcpip),25(smtp),21(ftp) etc.,
Note2: you can use any name not only ‘MyApp’
This solution works for sure unless your WebDev.Webserver.exe is physically corrupted.
1) Unable to connect Asp.net development server ?
Answer: No way find for that error
Step 1: Select the “Tools->External Tools” menu option in VS or Visual Web Developer. This will allow you to configure and add new menu items to your Tools menu.
Step 2: Click the “Add” button to add a new external tool menu item. Name it “WebServer on Port 8010” (or anything else you want). Step 3: For the “Command” textbox setting enter this value: C:WINDOWSMicrosoft.NETFrameworkv2.0.50727WebD ev.WebServer.EXE (note: this points to the
web-server that VS usually automatically runs).
Step 4: For the “Arguments” textbox setting enter this value: /port:8010 /path:$(ProjectDir) (or any port you like) Step 5: Select the “Use Output Window” checkbox (this will prevent the command-shell window from popping up. Once you hit apply and ok you will now have a new menu item in your “Tools” menu called “WebServer on Port 8010”. You can now select any web project in your solution
and then choose this menu option to launch a web-server that has a root site on port 8010 (or whatever other port you want) for the project.
You can then connect to this site in a browser by simply saying http://localhost:8010/. All root based references will work fine. Step 6: The last step is to configure your web project to automatically reference this web-server when you run or debug a site instead of launching the built-in
web-server itself. To-do this, select your web-project in the solution explorer, right click and select “property pages”. Select the “start options” setting on the left, and
under server change the radio button value from the default (which is use built-in webserver) to instead be “Use custom server”. Then set the Base URL value to be:
Obviously I don't know if this is the problem you had but definitely it is something similar, essentially the problem should be that the same port used by your
Development Server is not available because it is already used by another web server.
Here are the steps 1. 'Website' Menu in your visual studio ide. 2. select 'Start Options' 3. enable 'Use Custom Server' radio button. 4. Enter any URL you desire similar to 'http://localhost:8010/MyApp' Note1: you can use any port number not only '8010' but not designated port numbers like 8080(tcpip),25(smtp),21(ftp) etc., Note2: you can use any name not only 'MyApp' This solution works for sure unless your WebDev.Webserver.exe is physically corrupted.
Both of not worked after that Windows repair option remain
My solution was to turn off Internet Connection Sharing on my wireless adapter, after which it immediately worked. I made no other change. I suspect ICS’s DHCP server was interfering.
Try commenting out the following line, if it exists, in your hosts file (
This worked for me using Visual Studio 2008 SP1 on Vista Ultimate x64 SP2.
I got this problem a couple of times and done different things to fix it. When I got it this time all I did to stop getting “unable to connect to asp…” error, was rename the web app folder directory from
xpCal2. I also tried moving the web app directory to a different directory from
C:users<me>desktopnew folder and it also worked.
I don’t know why it worked, does VS 2010 keep information about web apps seperate from web apps folder.
In my case, when I had the ASP.NET Development Server crash, one thing that worked was to change the port for the project.
I suspect what happened was when the web server crashed it did not release a lock on the port. Even though it was not running in Task Manager, something was blocking a new instance of the web server from starting again on the original port. Changing the port was a decent enough work around. I could have rebooted, but who has time for that, right?
Details: Windows 7 x64, VS2010, .NET Framework 4.0, ASP.NET web site using the built in web server to VS2010.
BTW, I would be a little cautious with replacing the
WebDev.WebServerServer.EXE as suggested in other posts. If that file has been corrupted then you have bigger problems with your OS.
Just change the asp.netweb development server port from automatic to a specific port
That’s what worked for me
1) not reflecting HttpContext in class file ?
Answer:-Most of the time when using this syntax in class file is not working
we have to add reference then it work in class file
example using system.web write this syntax in class file
System.Web.HttpContext(HttpContext is not reflecting )
after that i add refrence system web than it reflect
None of the above solutions worked for me, but I did find one that worked: opening up the Administrative Tools/Services window and stopping the “WebClient” service. It’s something of a pain to have to disable it when trying to work with my code, but it’s easier than the logging off and back on I used to have to do.
—— whenever we debug our project (either by pressing ctrl+f5 or only f5) the first .exe which is called by VS is called WebDev.WebServer.EXE which got corrupted may be n number of reasons
—— We need to replace this file
——Step 1 —
go location C:Program FilesCommon FilesMicrosoft SharedDevServer9.0 You will find this file
——-Step 2 —
download WebDev.WebServer.rar file from http://www.2shared.com/file/11532086/a7f9858a/WebDevWebServer.html
——-Step 3 —
NOTE : You will need password for extraction this downloaded .rar file Password : optimusprime
—— Step 4 —
Copy the downloaded WebDev.WebServer.EXE file and replace in this below path
“C:Program FilesCommon FilesMicrosoft SharedDevServer9.0
run the program
Go to Run >> type >> cmd >> type
taskkill /IM webdev.webserver20.exe
and then try to re run the program
In my case I was using Windows 8 and Windows Firewall was blocking WebDev.WebServer.EXE
So I went to the settings of Windows Firewall > Allow an app through Windows Firewall > Add new
and browse to C:Program Files (x86)Common FilesMicrosoft SharedDevServer11.0
Then select WebDev.WebServer to allow.
For some poor souls out there starting using TypeMock on ASP.NET unit tests like me, you need to disable it in Visual Studio to avoid this error: In Tools->Add-in Manager, untick the boxes for TypeMock Isolator. I guess you need to switch this back on for your unit tests.