问题
I can normally debug my web service with no problem, but now I persistently get error "Unable to launch the IIS Express Web Server. Port 3268 is in use". I have looked at previous questions about this, but I am stuck:
it doesn't matter what port I use
rebooting, closing web browser, deleting web history etc all fail
tools like TCPView show that the port is NOT in use
I can start/stop IISExpress from a command prompt OK
normally, address localhost:3268 shows an error message in a browser - but after loading the project in Visual Studio (and BEFORE starting to debug the project, or doing anything at all to it), localhost:3268 shows a web page in the browser
回答1:
You can change the port of the website from the website properties under the web ribbon, specifying a different port other than 3268.
Also a link from the Stackoverflow discusses the same scenario
Why and how to fix? IIS Express "The specified port is in use"
回答2:
I was having these issues with specific projects.
For me,
- no website was running iin IIS Express
- nothing was using the port as determined by running:
netstat -anoat the command line.
The solution was to run
netsh http add iplisten ipaddress=::
from the command line.
Happy days, and credit to: James Bryant! https://developercommunity.visualstudio.com/content/problem/110767/specified-port-is-in-use.html
回答3:
The link that Krishna provided inspired me to open IIS and discover that there was a local web site in IIS with the same port (it was the same web service). I deleted that, and now I can debug my application again.
I cannot explain why I couldn't see the port in use, why it started offering the web page when the project was loaded in Visual Studio, and why I couldn't see that IIS was running in the task manager. I am guessing that Visual Studio was actually running it somehow.
Thanks to all respondents for their help!
回答4:
1, firs click properties.
- Click web tab and in servers section change the port number. (simply increment or decrement the last digit
After that click "Create Virtual Directory" button. Then debug and run.
I hope this will solve your problem
来源：https://stackoverflow.com/questions/34898901/iis-express-web-server-port-is-in-use