Unable to connect to Visual Studio's Localhost Web Server

發行項
07/11/2006

Screwing up an installation is so easy! I realized it when I was working on an issue today and had to uninstall the .NET Framework (that's different story ;o). I used my Control Panel and uninstalled it, but I was not done yet! I wanted to wipe out all traces of .NET 2.0 from my box and I deleted the C:\WINNT\Microsoft.NET\Framework\v2.0.50727 folder. Then I simply re-installed it and found that everything was working fine except the projects which were being accessed through FileSystem. I was not able to debug those projects at all... Even a CTRL+F5 wouldn't work!!

Here is the error message which I got...

---------------------------
Microsoft Visual Studio
---------------------------
Unable to connect to Visual Studio's Localhost Web Server
---------------------------
OK
---------------------------

Very soon, I found that there is a file called WebDev.WebServer.exe which was located in C:\WINNT\Microsoft.NET\Framework\v2.0.50727 folder and it was gone since I deleted the folder itself! Aahh... too late... But I was really happy when I found that when I copied the file WebDev.WebServer.exe from one of my colleague's box, it worked absolutely fine :o) And that just saved me a lot of time!

I would have hated myself, if I had to re-install the VS 2005 just because of a simple mistake.

The point to be noted here are...
1) Don't use Shift+Del to delete important folders. It is better to rename it ;o) (as if you didn't know already!)
2) In case you do the same mistake as I did... find a person who has the file, and Copy + Paste!!
3) It seems like VS2005 installation puts the file (WebDev.WebServer.exe) in the Framework folder. Take good care of it :o)

Cheers,
Rahul

Comments

Anonymous
August 17, 2006
actually i have the same problem and that exe file also exists in that directory

give me a suggestions
Anonymous
August 18, 2006
The comment has been removed
Anonymous
November 20, 2006
Thanks for the tip. I had the same problem yesterday. I was too fast deleting the v2.0.... folder. Now after i copied the webdev.webserver from my second machine all is working fine again. Cheers, Frank.
Anonymous
November 24, 2006
Thanks for the tip about the missing exe.
Anonymous
January 02, 2007
Hi i am also facing same problem "Unable to connect to Visual Studio's Localhost Web Server", i have that "WebDev.WebServer.exe" file in my "C:WINNTMicrosoft.NETFrameworkv2.0.50727" folder. I am not able to detect exact cause to this problem. I am not able to debug any web application. Event Ctrl+F5 is also giving same error... So, i get two error messages as below :

"Unable to find version of the runtime to run this application"
"Unable to connect to Visual Studio's Localhost Web Server" Please help me out...

Anonymous
January 02, 2007
The comment has been removed
Anonymous
January 11, 2007
WebDev.WebServer.exe already exist but i replaced it with the one working on other machine...................It worked!!!!!!
Anonymous
February 05, 2007
I had a problem with .net 2005. When i install it and run it, it worked fine. I also restart my computer then also it was fine. But on another day when i come and run my project the same error comes. Then i again set up .net 2005. then it worked fine. But the same thing i have to do again and again setup of .net every day. So suggest me the answer of my problem
Anonymous
February 05, 2007
I had a problem with .net 2005. When i install it and run it, it worked fine. I also restart my computer then also it was fine. But on another day when i come and run my project the same error comes. Then i again set up .net 2005. then it worked fine. But the same thing i have to do again and again setup of .net every day. So suggest me the answer of my problem Megha
Anonymous
February 06, 2007
Hi Megha, It this happens daily, I have a feeling that there is something goofy going on from the Policy perspective. Give me the exact error message which you are facing. If it is the same error message as this post, try removing your PC from the domain and re-install. Let it be out of domain and try to repro the issue and see if that happens again. HTH, Rahul
Anonymous
March 09, 2007
hi i have installed visual studios Express webdeveloper addition,for two days it worked well but for third day it showed error message so can any one help me plse to solve the problem
Anonymous
March 09, 2007
hi i have installed visual studios Express webdeveloper addition,for two days it worked well but for third day it showed error message so can any one help me plse to solve the problem thank you
Anonymous
March 10, 2007
Hi Raghu, What is complete error message you are getting? Do you remember making any changes to your PC? -Rahul
Anonymous
March 11, 2007
hi rahulso I did not make any changes to my PC except i reinstalled the web developer again, it worked nicely for some time but again same problem continued The error message was unnable to connect to Visual Studio's local host webserver and also cannot find version of runtime to run this application i have replaced Webserver.EXE file from remote system and placed in my PC for some time it worked ,but again same problem occured can u plse give a solution for this? thannks
Anonymous
March 12, 2007
The comment has been removed
Anonymous
March 12, 2007
The comment has been removed
Anonymous
March 14, 2007
The comment has been removed
Anonymous
April 09, 2007
Thanks so much for posting this! I deleted the .NET2.0 folder earlier today to test a setup program's installer of the .Net framework. And after it installed I couldn't build my websolution anymore. Turns out I deleted this file! Thanks for the solution!
Anonymous
June 09, 2007
The comment has been removed
Anonymous
June 26, 2007
i work on file system not on iis ,it was working fine suddenly it started throwing this alert message--"unable to connect to visualstudios's localhost web server"
Anonymous
July 03, 2007
Same thing here. Windows XP Pro SP2 / Administrator, standalone. I created a new website in VWD2005 Express Edition, localhost/appname. When I go to Website-ASP.NET configuration it starts the ASP.NET Development server and in a while it throws "unable to connect to visualstudios's localhost web server:. I reinstalled .NET 2.0 and VWD2005 EE and it seemed to work fine. After an hour or so, same problem! I also did the aspnet_regiis thing as mentioned above. Help....
Anonymous
July 03, 2007
Sometimes, not always(!), I can start Menu-Website-ASP.NET Configuration AFTER I did a Menu-Build-Rebuild Website. Other times it gives me the error "unable to connect......" It also seems to depend on the portnumber that the localhost web server is openening. Windows Firewall is off. Can I shut down this webserver and always use IIS instead?
Anonymous
July 03, 2007
It gets even stranger.... I had two instances of SQLEXPRESS on my machine and I disabled the second one (SQLEXPRESS with FULLTEXTSEARCH enabled). Now my VWD is working fine! I can acces the ASP.NET configuration and I can use Visual Studio's localhost web server. I let you know if there are more problems from now on.
Anonymous
July 16, 2007
The comment has been removed
Anonymous
July 25, 2007
hi, i am getting two errors like- 1.ASP.Net development server failed to start listening on port 1290.only one usage of each socket address is normally permitted 2.unable to connect to visual studio's localhost web server i have installed VS2005 and i was working comfortably fine with the application yeasterday but today its showing me the above errors.i have that "WebDev.WebServer.exe" file in my "C:WINNTMicrosoft.NETFrameworkv2.0.50727" folder.
Anonymous
July 25, 2007
The comment has been removed
Anonymous
July 31, 2007
I don't seem to have the WebDev.WebServer.exe in my C:WindowsMicrosoft.NETFrameworkv2.0.50727 folder. I seem to remember reinstalling .NET framework a while ago, and just tried to use ASP.NET Configuration from the Website menu... am getting the same "Unable to connect to Visual Studio's Localhost Web Server" error. No sure what I need to install, uninstall. Is there some way I can extract this file without uninstalling and re-installing? Thanks!
Anonymous
July 31, 2007
The comment has been removed
Anonymous
August 03, 2007
hi i'm working on asp.net2005 and i install ajax on it,i've not install ajax tool kit yet, and i try to run any project than i find a error "unable to find a version of the runtime to run this apllication" and than it show me another error"unable to connect to visual studio localhost web server" i also try to run the project which i made earlier. but same... so can u help me plz waiting for ur reply Regards Asif Ghanchi email id:ghanchiasif@gmail.com
Anonymous
August 03, 2007
hi i already try to find the webdev.webserver.exe and than i run it than it show me the same error. when i executing any project. Regards Asif Ghanchi
Anonymous
January 13, 2008
i am already having webdev.webserver.exe and its size is 116 kb. When i try to run it shows me the error that access a socket in way forbidden by its access permission. and then Unable to connect to Visual Studio's Localhost Web Server. plz help. i am using network drive. Regards sanjeev http://mindgrillq.blogspot.com
Anonymous
January 14, 2008
Hi Sanjeev, Did you check the firewall and the ports? Is it blocked? Regards, Rahul
Anonymous
January 14, 2008
Hi, I've got the message ("unable to connect...")trying to run website in file system. When I tried "aspregiis -i" it said that "setup has detected some errors". When I checked the setup log file, I found 4 "failure" messages: - Failure Cleaning up registry: CleanupRegistry failed with HRESULT 80070002: 'The system cannot find the file specified. ' - Failure Waiting for service to start: WaitForServiceState failed with HRESULT 8007041d: 'The service did not respond to the start or control request in a timely fashion. ' - Failure Starting service: w3svc: StartServiceByName failed with HRESULT 8007041d: 'The service did not respond to the start or control request in a timely fashion. ' - Failure Restarting W3SVC: RestartW3svc failed with HRESULT 8007041d: 'The service did not respond to the start or control request in a timely fashion. ' Please, help! Michael
Anonymous
January 15, 2008
Hi Michael, Are you logged on as an Administrator? Do as follows...

Login as Admin
Create a very simple text file and call it test.aspx. Check if you are able to run that page on that IIS.
It seems like the IIS is not appearing healthy or it could be something related with permissions.
Also check if you are able to browse any htm or asp pages. Rahul

Anonymous
January 15, 2008
Hi, Rahul When I open in VWD 2005 a localhost website ("http://localhost/mysite") and press F5, it runs good. But when I open site in file system("C:/mysite) and press F5 or Ctrl/F5 it gives the message ("unable to connect...") Michael
Anonymous
January 16, 2008
when I create new site in LOCAL IIS mode it works fine. when I create even very simple page in file system (C:/WebSites/simple.htm) it is unable to connect ... I reloaded VWD 2005 Express Edition, made sure WebDev.WebServer exist, but nothing changed. I guess my ASP.NET is not installed properly. I tried to correct it but failed. Michael
Anonymous
January 16, 2008
Maybe I need to correct my .NET Framework, and then reinstall ASP.NET? Michael
Anonymous
January 16, 2008
Hi Mike, Have you tried creating a new project in some other folder, like C:TestFolderTestWebSite? If not, please try that. If you like you can install Process Monitor and check if you are seeing any access denied on the folder where you are creating the website. Re-installing .NET Framework might help as well in your case. Regards, Rahul
Anonymous
February 28, 2008
Everything was working fine. Then, i made some changes in date to do some experiments. first i forwarded the date by few months. Then, put it back to current. In the meanwhile, it started giving these errors:

asp.net development server failed to start listening on port 1038 an attempt was made to access a socket in a way forbidden by its access permissions
unable to connect to visual studio localhost web server I have verified the existence of file WebDev.WebServer.EXE at this path: C:WINDOWSMicrosoft.NETFrameworkv2.0.50727 its there. can anyone give me some idea?

Anonymous
February 28, 2008
Hello Horizon, Do you have any Antivirus/Firewall which is locking up the port? By any chance, are you using source safe?
Anonymous
March 09, 2008
rahulso's brilliant suggestion of checking the pID in netstat and killing the process in the Task Manager solved my problem. It was a process called 'SR_Service.exe' which is to do with my VPN client. Thanks Rahul :)
Anonymous
March 18, 2008
Thanks Its Great you solved my problem
Anonymous
April 08, 2008
i got the same problem , for a long time i cannt solve it ,could anyonehelp me , and even from the starting my iis is also not working , i have the follwing problem, Asp.Net developement Server failed to start listening on port 1045. error message: a socket operation encountered a dead network. unable to connect to viual stuidos localhost webserver. i have my windows xp, visual studio 2005 pls help me.
Anonymous
April 09, 2008
Hi Sasi, This error message typically means a serious failure of the network system (i.e. the protocol stack that the WinSock DLL runs over), the network interface, or the local network itself is broken. 2 things...

Do you get this error message with the same port number everytime?
Do you have any proxies and is ByPass Proxy server for local addresses checked in your IE??

Anonymous
April 09, 2008
i, thanks for ur reply, actually i am doing at home computer caught this problem is there any solution , i have to format the computer ,reinstall everything
Anonymous
April 24, 2008
Do one thing go to tool menu. open Internet option. select connection tab then open lan setting. There select bypass proxy server for local address. i will work.
Anonymous
July 29, 2008
This is fantastic! I had the exact error, copied the file from my colleagues machine & voila I get local web server again!!!! Congrats on a great article.
Anonymous
August 12, 2008
hi all. actually i have same problem but with .net 2008 and there is no exe of webserver. wat to do pl help.
Anonymous
August 18, 2008
hi all when designing page in VS web developer expresss 2008 when i right click on the page and select the "view in Browser" option then it shows can not connect to server.it also says check the browser configuration. pls help me in this regard
Anonymous
September 04, 2008
Hi every body I want to till you that I was have this problem and I try alot of solutions to solve it but without any benefits but I found that the reason of this problem is this file that called WebDev.WebServer that is exist at the path C:WINDOWSMicrosoft.NETFrameworkv2.0.50727 that when I get it from my friend from his pc and replace the new with the exist file I found that the program become very nice and run all the web appliction without any problem so that I put the new file in host server to download it and to solve your problems. the host server url :- http://rapidshare.de/files/40393777/WebDev.WebServer.rar.html thanks
Anonymous
September 05, 2008
hi all, this is Dilip,i am facing a huge problem, i did everything but it is still there. My problem is At the time of Debug for Windows application it gives error as "the application failed to initialize properly (0xc000007b)" and for Web application it gives error as "unable to connect to visual studio's localhost web server" Due to this i can not work on either Web or Windows application at all. I read several solution but all just hit and try methods but it won't help me. All say they just solved their problem by some luck but no one got exact solution. I reinstalled VS 2005 and Win -XP both doesn't help and also format my machine then install fresh copy of both. Also Reset IIS and install framework 2.0 but it won't help me.Even i don't have any firewall installed but same problem persist. I also copy WebDev.WebServer.exe from my friends machine to my machine but no luck. Please give some genuine solution, not just hit and try solutions. I can not work on any type of application. If this problem persist that means Microsoft VS 2005 and XP has some serious bug inside. Please .......Provide me solution. Thanks & Regards Dilip Kumar S. Vishwakarma
Anonymous
September 11, 2008
hi all, it's me dilip again, butstill no solution. i think the problem has difficult solution. That's why no one is interested in giving appropraite solution. Thanks & Regards Dilipv
Anonymous
September 12, 2008
Hi Dilip, Your problem looks a bit tricky. Typically, the error message 0xc000007b would mean...

for hex 0xc000007b / decimal -1073741701 :

STATUS_INVALID_IMAGE_FORMAT ntstatus.h

{Bad Image}

The application or DLL %hs is not a valid Windows image.

Please check this against your installation diskette.

1 matches found for "0xc000007b"

Thus, it appears that the file is corrupt. And I believe that it is not a bug. Tell me the following...

Try installing VS from any other source. If you can do it, try installing Visual Express and see if that works for you (it is free).
Are you able to create new projects and debug them properly?
Did this ever work on your machine? You may also try to open a case with GTSC-India and they should be able to help you out on this issue. Rahul

Anonymous
September 15, 2008
Hi rahulso, thanks for your support , i install vs 2005 from my hard disk. but as you said try to install from other sources. I will try than make you know the sane. Thanks & Regards Dilipv
Anonymous
September 22, 2008
Due to other issues i uninstalled my .net framework and then deleted the folder. thanks a lot...Saved me a ton of time!
Anonymous
September 22, 2008
Due to other issues i uninstalled my .net framework and then deleted the folder. thanks a lot for the tip...Saved me a ton of time!
Anonymous
December 15, 2008
actually i have the same problem and that exe file also exists in that directory give me a suggestions
Anonymous
December 15, 2008
hi all, this is Praveen,i am facing a huge problem, i did everything but it is still there. My problem is At the time of Debug for Windows application it gives error as "ASP.NET server failed to start listnening on port 4217. Error message:An innvalid argument was supplied" and for Web application it gives error as "unable to connect to visual studio's localhost web server" Due to this i can not work on either Web or Windows application at all. I read several solution but all just hit and try methods but it won't help me. All say they just solved their problem by some luck but no one got exact solution. I reinstalled VS 2005 and Win -XP both doesn't help and also format my machine then install fresh copy of both. Also Reset IIS and install framework 2.0 but it won't help me.Even i don't have any firewall installed but same problem persist. I also copy WebDev.WebServer.exe from my friends machine to my machine but no luck. Please give some genuine solution, not just hit and try solutions. I can not work on any type of application. If this problem persist that means Microsoft VS 2005 and XP has some serious bug inside. Please .......Provide me solution. Thanks & Regards Praveen.A
Anonymous
December 15, 2008
Hello Praveen Run the following commands... netstat -ano >> C:ForRahul.txt tasklist >> C:ForRahul.txt and send me that "ForRahul.txt" file through email... rahul AT Microsoft DOT com Thanks, Rahul
Anonymous
December 28, 2008
Hi, i am also getting same problem . but i am having the file named "WebDev.WebServer.EXE" in the location "C:WINDOWSMicrosoft.NETFrameworkv2.0.50727". but some times service is running in one port number and the client/browser is calling the another port no. for example: suppose the IIS Service calling port is 1106. the browser is calling the url is like http://localhost:1100/ so, please help me regarding this problem. Thanks Uma Maheswara
Anonymous
December 28, 2008
Hi Rahul, please any one can help me regarding below mentioned problem. i am getting error message like "Unable to connect localhost web server" i am also getting same problem . but i am having the file named "WebDev.WebServer.EXE" in the location "C:WINDOWSMicrosoft.NETFrameworkv2.0.50727". but some times service is running in one port number and the client/browser is calling the another port no. for example: suppose the IIS Service calling port is 1106. the browser is calling the url is like http://localhost:1100/ so, please help me regarding this problem. Thanks Uma Maheswara
Anonymous
January 04, 2009
I am unable to connect to my Asp.net Server on my local machine. When i run my application it bis telling me that unable to connect to ASP.NET Development server
Anonymous
January 20, 2009
hi rahul, these are the 2 errors am facing when ever i view my web application in browser..i have tried the above options..i have checked for the webDev.webserver exe.it is there.reinstalled the vs2005,reset the iis.i m using standalone pc,os is windows xp.. errors:

ASP.NET Development Server

ASP.NET Development Server failed to start listening on port 1042. Error message: An attempt was made to access a socket in a way forbidden by its access permissions

OK

Microsoft Visual Studio