blocks|key|4525550|text|来自https://www.davidsalter.co.uk/unable-to-launch-the-iis-express-web-server-error-0x80070020/|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|4525551|错误代码0x80070020表示ERROR_SHARING_VIOLATION，对于IIS+Express+(或IIS)，这意味着它试图侦听的端口正被另一个进程使用。|style|CODE|4525552|使用netstat命令找出哪个应用程序正在使用该端口。|4525553|netstat+-ao+%7C+findstr+<port_number_to_search_for>|code-block|syntax|javascript|4525554|a参数告诉netstat显示所有连接和侦听端口。|4525555|o参数告诉netstat显示与连接相关联的进程ID。|4525556|运行上面的netstat命令将产生如下输出：|4525557|C:\>netstat+-ao+%7C+findstr+4026
TCP++++12.0.0.1:4026++++++++cs-pc:4026+++++++++LISTENING+++++++9544|4525558|最后显示的数字(这里是9544)是进程ID。|4525559|entityMap|0|LINK|mutability|MUTABLE|url|https://www.davidsalter.co.uk/unable-to-launch-the-iis-express-web-server-error-0x80070020/^0|2|2J|0|0|4|A|G|N|0|2|7|0|0|0|1|0|0|1|0|0|0|0^^$0|@$1|2|3|4|5|6|7|16|8|@]|9|@$A|17|B|18|1|19]]|C|$]]|$1|D|3|E|5|6|7|1A|8|@$A|1B|B|1C|F|G]|$A|1D|B|1E|F|G]]|9|@]|C|$]]|$1|H|3|I|5|6|7|1F|8|@$A|1G|B|1H|F|G]]|9|@]|C|$]]|$1|J|3|K|5|L|7|1I|8|@]|9|@]|C|$M|N]]|$1|O|3|P|5|6|7|1J|8|@$A|1K|B|1L|F|G]]|9|@]|C|$]]|$1|Q|3|R|5|6|7|1M|8|@$A|1N|B|1O|F|G]]|9|@]|C|$]]|$1|S|3|T|5|6|7|1P|8|@]|9|@]|C|$]]|$1|U|3|V|5|L|7|1Q|8|@]|9|@]|C|$M|N]]|$1|W|3|X|5|6|7|1R|8|@]|9|@]|C|$]]|$1|Y|3|-4|5|6|7|1S|8|@]|9|@]|C|$]]]|Z|$10|$5|11|12|13|C|$14|15]]]]

From <a href="https://www.davidsalter.co.uk/unable-to-launch-the-iis-express-web-server-error-0x80070020/" rel="noreferrer">https://www.davidsalter.co.uk/unable-to-launch-the-iis-express-web-server-error-0x80070020/</a>

Error code <code>0x80070020</code> means <code>ERROR_SHARING_VIOLATION</code>, which in the case of IIS Express (or IIS) means that the port that it is attempting to listen on is being used by another process.

Use the <code>netstat</code> command to find out which application is using the port.

<pre><code>netstat -ao | findstr &lt;port_number_to_search_for&gt;
</code></pre>

The <code>a</code> parameter tells netstat to display all connections and listening ports.

The <code>o</code> parameter tells netstat to display the process ID associated with the connection.

Running the above netstat command will produce output such as:

<pre><code>C:\&gt;netstat -ao | findstr 4026
TCP 12.0.0.1:4026 cs-pc:4026 LISTENING 9544
</code></pre>

The last number displayed (9544 here) is the process ID.

blocks|key|4525590|text|我也有同样的问题。我刚刚重新启动了Visual+Studio，它起作用了。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4525591|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

I had the same problem. I just restarted Visual Studio and it worked.

blocks|key|4525613|text|upgrading+an+MVC+project的时候我遇到了这个问题。我将较新的MVC+.csproj复制到我现有的.csproj文件上，然后返回到一个完全工作的项目中。我没有考虑的是旧.csproj中现有的端口号。新项目具有新端口号，但共享了项目/程序集名称。这足以使IIS+Express失去理智并抛出此异常。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|4525614|只需从git中挖掘出旧的端口号，并更改IIS+Express+URL以将其包含在项目设置中，就足以修复它。|4525615|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/12655808/asp-net-mvc3-to-mvc4-upgrade-tool^0|0|O|0|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@$A|O|B|P|1|Q]]|C|$]]|$1|D|3|E|5|6|7|R|8|@]|9|@]|C|$]]|$1|F|3|-4|5|6|7|S|8|@]|9|@]|C|$]]]|G|$H|$5|I|J|K|C|$L|M]]]]

I had this problem when <a href="https://stackoverflow.com/questions/12655808/asp-net-mvc3-to-mvc4-upgrade-tool">upgrading an MVC project</a>. I copied over the newer-MVC .csproj over my existing .csproj file then worked back to a fully working Project. What I failed to consider is the existing port number in the old .csproj. The new project had a new port number, yet shared the Project/Assembly Name. That was enough to make IIS Express lose its mind and throw this exception.

Just digging the old port number out of git and changing the IIS Express URL to include it in Project Settings was enough to fix it.

blocks|key|17960|text|在我们将解决方案从Visual+Studio+2012升级到2015年后，我遇到了同样的问题。我来到这里并运行netstat，结果发现没有其他应用程序在使用相同的端口。事实证明，我在Users/<username>/Documents/IISExpress/config的applicationhost.config和我的解决方案中.vs文件夹中的applicationhost.config中映射了相同的站点和相同的端口。我应该指出的是，问题也不是在升级之后立即开始的。它只是在一天早上开始不断地失败。几次重启似乎也没有解决这个问题。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|17961|从my+Documents中存储的站点中删除冲突的站点并重新启动Visual+Studio解决了该问题。|17962|entityMap^0|1J|7|2J|18|3S|M|4M|3|4U|M|0|0^^$0|@$1|2|3|4|5|6|7|J|8|@$9|K|A|L|B|C]|$9|M|A|N|B|C]|$9|O|A|P|B|C]|$9|Q|A|R|B|C]|$9|S|A|T|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|U|8|@]|D|@]|E|$]]|$1|H|3|-4|5|6|7|V|8|@]|D|@]|E|$]]]|I|$]]

I ran into the same problem after we had upgraded a solution from Visual Studio 2012 to 2015. I had come here and ran <code>netstat</code> only to find that no other application was using the same ports. It turns out I had the same sites with the same ports mapped in the <code>applicationhost.config</code> at <code>Users/&lt;username&gt;/Documents/IISExpress/config</code> and the <code>applicationhost.config</code> in the <code>.vs</code> folder inside my solution. I should note that the problem didn't start right after the upgrade either. It just start failing consistently one morning. A couple reboots didn't seem to solve the problem either.

Removing the conflicted sites from the one stored in my Documents and restarting Visual Studio solved the problem.

blocks|key|4525695|text|在不进入命令控制台的情况下，最简单的第一步是关闭所有应用程序(包括VS)，然后启动VS并重试。可能是另一个应用程序导致了冲突，比如您的浏览器。在我的例子中，Chrome导致了这个问题，并在关闭所有东西并重新启动VS时得到了解决。我再次打开Chrome，一切都很好。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4525696|上面的netstat东西是有用的，但对我来说，只有在你不能按照我的建议去做的情况下才有用。|4525697|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

The easiest first pass at this without getting into the command console is to just shut down all applications (including VS), then launch VS by itself and try it again. There is likely another application like your browser causing the conflict.
In my case Chrome caused it and was solved when shutting everything down and restarting VS. I opened Chrome again and everything was fine.

The netstat stuff above is useful, but to me that's only if you can't do what I'm suggesting.

blocks|key|18037|text|转到Web项目属性>>+Web+>>项目Url+>>更改端口，即：http://localhost:22345/+=>+http://localhost:22346/希望获得此帮助！|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|18038|entityMap|0|LINK|mutability|MUTABLE|url|http://localhost:22345/|1|http://localhost:22346/^0|X|N|0|1O|N|1|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@$A|O|B|P|1|Q]|$A|R|B|S|1|T]]|C|$]]|$1|D|3|-4|5|6|7|U|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]|L|$5|G|H|I|C|$J|M]]]]

Go to Web Project
Properties >> Web >> Project Url >> Change port
i.e: <a href="http://localhost:22345/" rel="nofollow noreferrer">http://localhost:22345/</a> => <a href="http://localhost:22346/" rel="nofollow noreferrer">http://localhost:22346/</a>
Hope this help!

blocks|key|4525817|text|中删除了从<site>到</site>标记的所有内容，从而修复了这个问题|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4525818|Users/<username>/Documents/IISExpress/config/applicatiohost.config文件|4525819|<sites>
++<site>
+++++.
+++++.+++===>+remove+this+content+including+the+<site>+and+</site>+tags.
+++++.
++</site>
</sites>|code-block|syntax|javascript|4525820|entityMap^0|5|6|C|7|0|0|1U|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]|$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|T|8|@$9|U|A|V|B|C]]|D|@]|E|$]]|$1|H|3|I|5|J|7|W|8|@]|D|@]|E|$K|L]]|$1|M|3|-4|5|6|7|X|8|@]|D|@]|E|$]]]|N|$]]

I was able fix this problem by removing everything from <code>&lt;site&gt;</code> to <code>&lt;/site&gt;</code> tags in

<code>Users/&lt;username&gt;/Documents/IISExpress/config/applicatiohost.config</code> file

<pre><code>&lt;sites&gt;
 &lt;site&gt;
 .
 . ===&gt; remove this content including the &lt;site&gt; and &lt;/site&gt; tags.
 .
 &lt;/site&gt;
&lt;/sites&gt;
</code></pre>

blocks|key|18160|text|我今天在Visual+Studio+2019遇到了这个问题，花了3个小时才最终解决了这个问题。Visual+Studio使用2个文件来跟踪SSL端口号，因此您必须修复这两个文件，并且在Visual+Studio关闭时必须同时修复这两个文件。这两个文件分别是位于解决方案的.vs\???\config文件夹中的applicationhost.config文件，以及web项目的.csproj.user文件夹。编辑这两个文件并删除有问题的配置。甚至可以把两个文件都删除。然后在Visual+Studio中重新打开您的应用程序。祝好运!|type|unstyled|depth|inlineStyleRanges|entityRanges|data|18161|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

I ran into this problem in Visual Studio 2019 today and spent 3 hours before finally figuring out the problem. Visual Studio uses 2 files to track the SSL port number, so you have to fix both and you have to fix both while Visual Studio is closed. The two files are the applicationhost.config file that is in the .vs\???\config folder of your solution; and also the .csproj.user folder of your web project.
Edit both files and removing the offending configs. Maybe even just delete both files. Then re-open your app in Visual Studio. Good luck!

blocks|key|4525945|text|如果netstat没有显示任何已经在使用该端口的内容|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4525946|netstat+-ano+%7C+findstr+<your+port+number>|offset|length|style|CODE|4525947|该端口可能已被排除，请尝试此命令以查看该范围是否被其他东西阻止：|4525948|netsh+interface+ipv4+show+excludedportrange+protocol=tcp|4525949|您可以尝试从多个端口的起始端口取消阻止范围(需要带管理员的命令提示符)：|4525950|netsh+int+ip+delete+excludedportrange+protocol=tcp+numberofports=<number+of+ports>+startport=<start+port>|4525951|对我来说，我不能解锁这些，我只是得到了“访问被拒绝”，所以我最终不得不为我的网站选择另一个端口。|4525952|entityMap^0|0|0|15|0|0|0|1K|0|0|0|2X|0|0^^$0|@$1|2|3|4|5|6|7|T|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|U|8|@$D|V|E|W|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|X|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|Y|8|@$D|Z|E|10|F|G]]|9|@]|A|$]]|$1|L|3|M|5|6|7|11|8|@]|9|@]|A|$]]|$1|N|3|O|5|6|7|12|8|@$D|13|E|14|F|G]]|9|@]|A|$]]|$1|P|3|Q|5|6|7|15|8|@]|9|@]|A|$]]|$1|R|3|-4|5|6|7|16|8|@]|9|@]|A|$]]]|S|$]]

<h3>If netstat doesn't show anything already using the port</h3>

<code>netstat -ano | findstr &lt;your port number&gt;</code>

The port might be excluded, try this command to see if the range is blocked by something else:

<code>netsh interface ipv4 show excludedportrange protocol=tcp</code>

You can try to unblock the range from the start port for a number of ports (need Command Prompt with Administrator):

<code>netsh int ip delete excludedportrange protocol=tcp numberofports=&lt;number of ports&gt; startport=&lt;start port&gt;</code>

For me I couldn't unblock these, I just got "Access is denied", so I ended up having to pick another port for my site.

blocks|key|4525999|text|在更新Windows10和/或Visual+Studio+16%2B之后，可能会由于internal+bug导致IISExpress无法注册任何开发网站，因为它不再接受localhost连接。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4526000|要解决这个问题，只需重新注册绑定即可。要执行此操作，请从管理外壳运行以下命令：|4526001|netsh+http+add+iplisten+ipaddress=::+|code-block|syntax|javascript|4526002|entityMap|0|LINK|mutability|MUTABLE|url|https://developercommunity.visualstudio.com/content/problem/556100/iisexpress-failed-to-register-url-for-site.html^0|2A|9|14|C|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@$9|V|A|W|B|C]]|D|@$9|X|A|Y|1|Z]]|E|$]]|$1|F|3|G|5|6|7|10|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|11|8|@]|D|@]|E|$K|L]]|$1|M|3|-4|5|6|7|12|8|@]|D|@]|E|$]]]|N|$O|$5|P|Q|R|E|$S|T]]]]

After updating Windows 10 and/or Visual Studio 16+ it might happen due to an <a href="https://developercommunity.visualstudio.com/content/problem/556100/iisexpress-failed-to-register-url-for-site.html" rel="noreferrer">internal bug</a> that IISExpress fails to register any development website because it no longer accepts <code>localhost</code> connections.

To fix the issue, you just have to register again the binding. To do so, run from an administrative shell the following command:

<pre><code>netsh http add iplisten ipaddress=:: 
</code></pre>

blocks|key|4526050|text|我使用的是VS2019版本16.10.0预览版2.0，我刚刚转到这里：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4526051|​|4526052|📷|atomic|offset|length|4526053|4526054|取消选中Enable+SSL+=>+Save+=>+check+it+back+=>+Save。|style|CODE|4526055|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/7cf8b8e45f9d41c049e32a0eac0c8657.png|imageAlt^0|0|0|0|1|0|0|0|4|A|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|X|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|Y|8|@]|9|@$G|Z|H|10|1|11]]|A|$]]|$1|I|3|C|5|6|7|12|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|13|8|@$G|14|H|15|L|M]]|9|@]|A|$]]|$1|N|3|-4|5|6|7|16|8|@]|9|@]|A|$]]]|O|$P|$5|Q|R|S|A|$T|U|V|-4]]]]

I'm using VS2019 Version 16.10.0 Preview 2.0 and I just went to here:
<a href="https://i.stack.imgur.com/SiSNg.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/SiSNg.png" alt="untick and save anв tick" /></a>
Unchecked <code>Enable SSL</code> =&gt; Save =&gt; check it back =&gt; Save.

blocks|key|18449|text|我的网站运行得很好，然后就开始无缘无故地收到这个错误。我打开了很多东西(包括几个VS项目)，不想重启。我也不想在这些解决方案上浪费时间，所以我只是在项目属性的Project+URL上更改了端口号……立马成功。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|18450|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

My site worked fine, then started getting this error for no reason. I had many things open (including several VS projects) and didn't want to reboot. I also didn't want to waste time with any of these solutions, so I just changed the port number on the Project URL of the project properties... instant success.

blocks|key|4526221|text|解决方案要简单得多。只需转到状态栏，查找IIS+express图标，然后停止该站点。解决方案：https://stackoverflow.com/a/69841149/8390589|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|4526222|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/a/69841149/8390589^0|1B|18|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

The solution is far easier. Just go to the status bar , look for the IIS express icon and stop the site.
Solution here: <a href="https://stackoverflow.com/a/69841149/8390589">https://stackoverflow.com/a/69841149/8390589</a>

I attempted to run my web service through visual studio. I faced an issue like :

<pre><code>---------------------------
Microsoft Visual Studio
---------------------------
Unable to launch the IIS Express Web server.

Failed to register URL "http://localhost:63591/" for site "xxxxxx" application
"/". Error description: The process cannot access the file because it is being
used by another process. (0x80070020)

---------------------------
OK 
---------------------------
</code></pre>

I saw the task manager and found that PID 4 is used by System and its Description is <code>NT Kernel &amp; System.</code>
So I tried to stop the <code>http service</code>.
All dependency services stopped. But I am facing an issue in stopping http service like

<pre><code>The service is starting or stopping. Please try again later.
</code></pre>

So, I tried to stop and start the service manually. But the End process is disabled. 
It will be helpful if anyone could help with this issue

"Unable to launch the IIS Express Web server." in Visual Studio

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我尝试通过visual studio运行我的web服务。我遇到了这样的问题：---------------------------Microsoft Visual Studio---------------------------Unable to launch the IIS Express Web server.F...

问“无法启动IIS Express Web服务器。”在Visual Studio中
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问“无法启动IIS Express Web服务器。”在Visual Studio中EN