blocks|key|4645382|text|下面的链接可能会对你有所帮助。下面是来自以下链接的代码。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4645383|参考：getting-the-client-ip-via-asp-net-web-api|offset|length|4645384|using+System.Net.Http;
using+System.ServiceModel.Channels;
using+System.Web;
using+System.Web.Http;


namespace+Trikks.Controllers.Api
{
++++public+class+IpController+:+ApiController
++++{
++++++++++public+string+GetIp()
++++++++++{
++++++++++++++++return+GetClientIp();
++++++++++}

++++++++++private+string+GetClientIp(HttpRequestMessage+request+=+null)
++++++++++{
++++++++++++++++request+=+request+??+Request;

++++++++++++++++if+(request.Properties.ContainsKey("MS_HttpContext"))
++++++++++++++++{
++++++++++++++++++++++return+++((HttpContextWrapper)request.Properties["MS_HttpContext"]).Request.UserHostAddress;
++++++++++++++++}
++++++++++++++++else+if+(request.Properties.ContainsKey(RemoteEndpointMessageProperty.Name))
++++++++++++++++{
+++++++++++++++++++++RemoteEndpointMessageProperty+prop+=+(RemoteEndpointMessageProperty)request.Properties[RemoteEndpointMessageProperty.Name];
+++++++++++++++++++++return+prop.Address;
++++++++++++++++}
++++++++++++++++else+if+(HttpContext.Current+!=+null)
++++++++++++++++{
++++++++++++++++++++return+HttpContext.Current.Request.UserHostAddress;
++++++++++++++++}
++++++++++++++++else
++++++++++++++++{
++++++++++++++++++++++return+null;
++++++++++++++++}
+++++++++++}
+++++}
}|code-block|syntax|javascript|4645385|下面是另一种方法。|4645386|参考：how-to-access-the-client-s-ip-address|4645387|适用于web托管版本|4645388|string+clientAddress+=+HttpContext.Current.Request.UserHostAddress;|4645389|对于自托管|4645390|object+property;
++++++++Request.Properties.TryGetValue(typeof(RemoteEndpointMessageProperty).FullName,+out+property);
++++++++RemoteEndpointMessageProperty+remoteProperty+=+property+as+RemoteEndpointMessageProperty;|4645391|entityMap|0|LINK|mutability|MUTABLE|url|http://www.herlitz.nu/2013/06/27/getting-the-client-ip-via-asp-net-web-api/|1|http://blogs.msdn.com/b/hongmeig1/archive/2012/07/09/how-to-access-the-client-s-ip-address.aspx^0|0|3|15|0|0|0|0|3|11|1|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|16|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|17|8|@]|9|@$D|18|E|19|1|1A]]|A|$]]|$1|F|3|G|5|H|7|1B|8|@]|9|@]|A|$I|J]]|$1|K|3|L|5|6|7|1C|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|1D|8|@]|9|@$D|1E|E|1F|1|1G]]|A|$]]|$1|O|3|P|5|6|7|1H|8|@]|9|@]|A|$]]|$1|Q|3|R|5|H|7|1I|8|@]|9|@]|A|$I|J]]|$1|S|3|T|5|6|7|1J|8|@]|9|@]|A|$]]|$1|U|3|V|5|H|7|1K|8|@]|9|@]|A|$I|J]]|$1|W|3|-4|5|6|7|1L|8|@]|9|@]|A|$]]]|X|$Y|$5|Z|10|11|A|$12|13]]|14|$5|Z|10|11|A|$12|15]]]]

Following link might help you. Here's code from the following link.

reference : <a href="http://www.herlitz.nu/2013/06/27/getting-the-client-ip-via-asp-net-web-api/" rel="noreferrer">getting-the-client-ip-via-asp-net-web-api</a>

<pre><code>using System.Net.Http;
using System.ServiceModel.Channels;
using System.Web;
using System.Web.Http;


namespace Trikks.Controllers.Api
{
 public class IpController : ApiController
 {
 public string GetIp()
 {
 return GetClientIp();
 }

 private string GetClientIp(HttpRequestMessage request = null)
 {
 request = request ?? Request;

 if (request.Properties.ContainsKey("MS_HttpContext"))
 {
 return ((HttpContextWrapper)request.Properties["MS_HttpContext"]).Request.UserHostAddress;
 }
 else if (request.Properties.ContainsKey(RemoteEndpointMessageProperty.Name))
 {
 RemoteEndpointMessageProperty prop = (RemoteEndpointMessageProperty)request.Properties[RemoteEndpointMessageProperty.Name];
 return prop.Address;
 }
 else if (HttpContext.Current != null)
 {
 return HttpContext.Current.Request.UserHostAddress;
 }
 else
 {
 return null;
 }
 }
 }
}
</code></pre>

Another way of doing this is below.

reference: <a href="http://blogs.msdn.com/b/hongmeig1/archive/2012/07/09/how-to-access-the-client-s-ip-address.aspx" rel="noreferrer">how-to-access-the-client-s-ip-address</a>

For web hosted version

<pre><code>string clientAddress = HttpContext.Current.Request.UserHostAddress;
</code></pre>

For self hosted

<pre><code>object property;
 Request.Properties.TryGetValue(typeof(RemoteEndpointMessageProperty).FullName, out property);
 RemoteEndpointMessageProperty remoteProperty = property as RemoteEndpointMessageProperty;
</code></pre>

blocks|key|138828|text|尝试使用以下命令获取Ip地址|type|unstyled|depth|inlineStyleRanges|entityRanges|data|138829|ip+=+HttpContext.Current+!=+null+?+HttpContext.Current.Request.UserHostAddress+:+"";|code-block|syntax|javascript|138830|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Try to get the Ip using

<pre><code>ip = HttpContext.Current != null ? HttpContext.Current.Request.UserHostAddress : "";
</code></pre>

blocks|key|138877|text|如果您使用OWIN自托管NuGet包在Asp.Net+2.1上进行自托管，则可以使用以下代码：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|138878|+private+string+getClientIp(HttpRequestMessage+request+=+null)
++++{
++++++++if+(request+==+null)
++++++++{
++++++++++++return+null;
++++++++}

++++++++if+(request.Properties.ContainsKey("MS_OwinContext"))
++++++++{
++++++++++++return+((OwinContext)+request.Properties["MS_OwinContext"]).Request.RemoteIpAddress;
++++++++}
++++++++return+null;
++++}|code-block|syntax|javascript|138879|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

If you're self-hosting with Asp.Net 2.1 using the OWIN Self-host NuGet package you can use the following code:

<pre><code> private string getClientIp(HttpRequestMessage request = null)
 {
 if (request == null)
 {
 return null;
 }

 if (request.Properties.ContainsKey("MS_OwinContext"))
 {
 return ((OwinContext) request.Properties["MS_OwinContext"]).Request.RemoteIpAddress;
 }
 return null;
 }
</code></pre>

blocks|key|4645512|text|使用Web+API+2.2：Request.GetOwinContext().Request.RemoteIpAddress|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4645513|entityMap^0|E|1C|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

With Web API 2.2: <code>Request.GetOwinContext().Request.RemoteIpAddress</code>

blocks|key|138945|text|最好将它转换为HttpContextBase，这样您就可以更容易地模拟和测试它|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|138946|public+string+GetUserIp(HttpRequestMessage+request)
{
++++if+(request.Properties.ContainsKey("MS_HttpContext"))
++++{
++++++++var+ctx+=+request.Properties["MS_HttpContext"]+as+HttpContextBase;
++++++++if+(ctx+!=+null)
++++++++{
++++++++++++return+ctx.Request.UserHostAddress;
++++++++}
++++}

++++return+null;
}|code-block|syntax|javascript|138947|entityMap^0|7|F|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

It's better to cast it to <code>HttpContextBase</code>, this way you can mock and test it more easily 

<pre><code>public string GetUserIp(HttpRequestMessage request)
{
 if (request.Properties.ContainsKey("MS_HttpContext"))
 {
 var ctx = request.Properties["MS_HttpContext"] as HttpContextBase;
 if (ctx != null)
 {
 return ctx.Request.UserHostAddress;
 }
 }

 return null;
}
</code></pre>

blocks|key|4645657|text|我认为这是最清晰的解决方案，使用扩展方法：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4645658|public+static+class+HttpRequestMessageExtensions
{
++++private+const+string+HttpContext+=+"MS_HttpContext";
++++private+const+string+RemoteEndpointMessage+=+"System.ServiceModel.Channels.RemoteEndpointMessageProperty";

++++public+static+string+GetClientIpAddress(this+HttpRequestMessage+request)
++++{
++++++++if+(request.Properties.ContainsKey(HttpContext))
++++++++{
++++++++++++dynamic+ctx+=+request.Properties[HttpContext];
++++++++++++if+(ctx+!=+null)
++++++++++++{
++++++++++++++++return+ctx.Request.UserHostAddress;
++++++++++++}
++++++++}

++++++++if+(request.Properties.ContainsKey(RemoteEndpointMessage))
++++++++{
++++++++++++dynamic+remoteEndpoint+=+request.Properties[RemoteEndpointMessage];
++++++++++++if+(remoteEndpoint+!=+null)
++++++++++++{
++++++++++++++++return+remoteEndpoint.Address;
++++++++++++}
++++++++}

++++++++return+null;
++++}
}|code-block|syntax|javascript|4645659|所以只要像这样使用它就行了：|4645660|var+ipAddress+=+request.GetClientIpAddress();|4645661|我们在我们的项目中使用这一点。|4645662|来源/参考资料：Retrieving+the+client’s+IP+address+in+ASP.NET+Web+API|offset|length|4645663|entityMap|0|LINK|mutability|MUTABLE|url|http://www.strathweb.com/2013/05/retrieving-the-clients-ip-address-in-asp-net-web-api/^0|0|0|0|0|0|8|1H|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|Z|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|10|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|11|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|12|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|13|8|@]|9|@$O|14|P|15|1|16]]|A|$]]|$1|Q|3|-4|5|6|7|17|8|@]|9|@]|A|$]]]|R|$S|$5|T|U|V|A|$W|X]]]]

I think this is the most clear solution, using an extension method:

<pre><code>public static class HttpRequestMessageExtensions
{
 private const string HttpContext = "MS_HttpContext";
 private const string RemoteEndpointMessage = "System.ServiceModel.Channels.RemoteEndpointMessageProperty";

 public static string GetClientIpAddress(this HttpRequestMessage request)
 {
 if (request.Properties.ContainsKey(HttpContext))
 {
 dynamic ctx = request.Properties[HttpContext];
 if (ctx != null)
 {
 return ctx.Request.UserHostAddress;
 }
 }

 if (request.Properties.ContainsKey(RemoteEndpointMessage))
 {
 dynamic remoteEndpoint = request.Properties[RemoteEndpointMessage];
 if (remoteEndpoint != null)
 {
 return remoteEndpoint.Address;
 }
 }

 return null;
 }
}
</code></pre>

So just use it like:

<pre><code>var ipAddress = request.GetClientIpAddress();
</code></pre>

We use this in our projects.

Source/Reference: <a href="http://www.strathweb.com/2013/05/retrieving-the-clients-ip-address-in-asp-net-web-api/" rel="noreferrer">Retrieving the client’s IP address in ASP.NET Web API</a>

blocks|key|139057|text|我的解决方案类似于user1587439的答案，但直接在控制器的实例上工作(而不是访问HttpContext.Current)。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|139058|在“监视”窗口中，我看到this.RequestContext.WebRequest包含'UserHostAddress‘属性，但由于它依赖于WebHostHttpRequestContext类型(位于'System.Web.Http’程序集的内部)-我无法直接访问它，所以我使用反射来直接访问它：|139059|string+hostAddress+=+((System.Web.HttpRequestWrapper)this.RequestContext.GetType().Assembly.GetType("System.Web.Http.WebHost.WebHostHttpRequestContext").GetProperty("WebRequest").GetMethod.Invoke(this.RequestContext,+null)).UserHostAddress;|offset|length|style|CODE|139060|我不是说这是最好的解决方案。使用反射可能会在将来框架升级的情况下引起问题(由于名称更改)，但对于我的需要，它是完美的|139061|entityMap^0|0|0|0|6O|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|O|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|P|8|@$F|Q|G|R|H|I]]|9|@]|A|$]]|$1|J|3|K|5|6|7|S|8|@]|9|@]|A|$]]|$1|L|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|M|$]]

My solution is similar to user1587439's answer, but works directly on the controller's instance (instead of accessing HttpContext.Current). 

In the 'Watch' window, I saw that this.RequestContext.WebRequest contains the 'UserHostAddress' property, but since it relies on the WebHostHttpRequestContext type (which is internal to the 'System.Web.Http' assembly) - I wasn't able to access it directly, so I used reflection to directly access it:

<code>string hostAddress = ((System.Web.HttpRequestWrapper)this.RequestContext.GetType().Assembly.GetType("System.Web.Http.WebHost.WebHostHttpRequestContext").GetProperty("WebRequest").GetMethod.Invoke(this.RequestContext, null)).UserHostAddress;</code>

I'm not saying it's the best solution. using reflection may cause issues in the future in case of framework upgrade (due to name changes), but for my needs it's perfect

blocks|key|139095|text|回复这篇4年前的文章，因为这对我来说太复杂了，至少如果你在IIS上托管的话。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|139096|下面是我解决这个问题的方法：|139097|using+System;
using+System.Net;
using+System.Web;
using+System.Web.Http;
...
[HttpPost]
[Route("ContactForm")]
public+IHttpActionResult+PostContactForm([FromBody]+ContactForm+contactForm)
++++{
++++++++var+hostname+=+HttpContext.Current.Request.UserHostAddress;
++++++++IPAddress+ipAddress+=+IPAddress.Parse(hostname);
++++++++IPHostEntry+ipHostEntry+=+Dns.GetHostEntry(ipAddress);
++++++++...|code-block|syntax|javascript|139098|与OP不同的是，它提供的是客户机IP和客户机主机名，而不是服务器。也许他们从那时起就修复了这个bug？|139099|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|O|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|P|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

Replying to this 4 year old post, because this seems overcomplicated to me, at least if you're hosting on IIS.
Here's how I solved it:
<pre><code>using System;
using System.Net;
using System.Web;
using System.Web.Http;
...
[HttpPost]
[Route(&quot;ContactForm&quot;)]
public IHttpActionResult PostContactForm([FromBody] ContactForm contactForm)
 {
 var hostname = HttpContext.Current.Request.UserHostAddress;
 IPAddress ipAddress = IPAddress.Parse(hostname);
 IPHostEntry ipHostEntry = Dns.GetHostEntry(ipAddress);
 ...
</code></pre>
Unlike OP, this gives me the client IP and client hostname, not the server. Perhaps they've fixed the bug since then?

blocks|key|139137|text|string+userRequest+=+System.Web.HttpContext.Current.Request.UserHostAddress;|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|139138|这对我很有效。|unstyled|139139|这个函数返回的结果和我从UserHostAddress中得到的结果相同。|offset|length|style|CODE|139140|entityMap^0|0|0|C|F|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|P|8|@]|9|@]|A|$]]|$1|G|3|H|5|F|7|Q|8|@$I|R|J|S|K|L]]|9|@]|A|$]]|$1|M|3|-4|5|F|7|T|8|@]|9|@]|A|$]]]|N|$]]

<pre><code>string userRequest = System.Web.HttpContext.Current.Request.UserHostAddress;
</code></pre>

This works on me.

<code>System.Web.HttpContext.Current.Request.UserHostName;</code> this one return me the same return I get from the <code>UserHostAddress</code>.

Hello I need get client IP that request some method in web api,
I have tried to use this code from <a href="http://www.strathweb.com/2013/05/retrieving-the-clients-ip-address-in-asp-net-web-api/">here</a> but it always returns server local IP,
 how to get in correct way ?

<pre><code>HttpContext.Current.Request.UserHostAddress;
</code></pre>

from other questions:

<pre><code>public static class HttpRequestMessageExtensions
 {
 private const string HttpContext = "MS_HttpContext";
 private const string RemoteEndpointMessage = "System.ServiceModel.Channels.RemoteEndpointMessageProperty";

 public static string GetClientIpAddress(this HttpRequestMessage request)
 {
 if (request.Properties.ContainsKey(HttpContext))
 {
 dynamic ctx = request.Properties[HttpContext];
 if (ctx != null)
 {
 return ctx.Request.UserHostAddress;
 }
 }

 if (request.Properties.ContainsKey(RemoteEndpointMessage))
 {
 dynamic remoteEndpoint = request.Properties[RemoteEndpointMessage];
 if (remoteEndpoint != null)
 {
 return remoteEndpoint.Address;
 }
 }

 return null;
 }
 }
</code></pre>

Asp Net Web API 2.1 get client IP address

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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您好，我需要获取客户端IP，这是请求在web api中的一些方法，我已经尝试使用此代码从，但它总是返回服务器本地IP，如何获得正确的方式？HttpContext.Current.Request.UserHostAddress;从其他问题中：public static class HttpRequestMessageEx...

问Asp Net Web API 2.1获取客户端IP地址
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