blocks|key|1101215|text|使用WebRequest。来自Scott+Hanselman|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1101216|public+static+string+HttpPost(string+URI,+string+Parameters)+
{
+++System.Net.WebRequest+req+=+System.Net.WebRequest.Create(URI);
+++req.Proxy+=+new+System.Net.WebProxy(ProxyString,+true);
+++//Add+these,+as+we're+doing+a+POST
+++req.ContentType+=+"application/x-www-form-urlencoded";
+++req.Method+=+"POST";
+++//We+need+to+count+how+many+bytes+we're+sending.+
+++//Post'ed+Faked+Forms+should+be+name=value&
+++byte+[]+bytes+=+System.Text.Encoding.ASCII.GetBytes(Parameters);
+++req.ContentLength+=+bytes.Length;
+++System.IO.Stream+os+=+req.GetRequestStream+();
+++os.Write+(bytes,+0,+bytes.Length);+//Push+it+out+there
+++os.Close+();
+++System.Net.WebResponse+resp+=+req.GetResponse();
+++if+(resp==+null)+return+null;
+++System.IO.StreamReader+sr+=+
+++++++++new+System.IO.StreamReader(resp.GetResponseStream());
+++return+sr.ReadToEnd().Trim();
}|code-block|syntax|javascript|1101217|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/system.net.webrequest.aspx|1|http://www.hanselman.com/blog/HTTPPOSTsAndHTTPGETsWithWebClientAndCAndFakingAPostBack.aspx^0|2|A|0|F|F|1|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@$A|T|B|U|1|V]|$A|W|B|X|1|Y]]|C|$]]|$1|D|3|E|5|F|7|Z|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|10|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]|Q|$5|L|M|N|C|$O|R]]]]

Use <a href="http://msdn.microsoft.com/en-us/library/system.net.webrequest.aspx" rel="noreferrer">WebRequest</a>. From <a href="http://www.hanselman.com/blog/HTTPPOSTsAndHTTPGETsWithWebClientAndCAndFakingAPostBack.aspx" rel="noreferrer">Scott Hanselman</a>:

<pre><code>public static string HttpPost(string URI, string Parameters) 
{
 System.Net.WebRequest req = System.Net.WebRequest.Create(URI);
 req.Proxy = new System.Net.WebProxy(ProxyString, true);
 //Add these, as we're doing a POST
 req.ContentType = "application/x-www-form-urlencoded";
 req.Method = "POST";
 //We need to count how many bytes we're sending. 
 //Post'ed Faked Forms should be name=value&amp;
 byte [] bytes = System.Text.Encoding.ASCII.GetBytes(Parameters);
 req.ContentLength = bytes.Length;
 System.IO.Stream os = req.GetRequestStream ();
 os.Write (bytes, 0, bytes.Length); //Push it out there
 os.Close ();
 System.Net.WebResponse resp = req.GetResponse();
 if (resp== null) return null;
 System.IO.StreamReader sr = 
 new System.IO.StreamReader(resp.GetResponseStream());
 return sr.ReadToEnd().Trim();
}
</code></pre>

blocks|key|1101262|text|就我个人而言，我认为执行http+post并获得响应的最简单方法是使用WebClient类。这个类很好地抽象了细节。在MSDN文档中甚至有一个完整的代码示例。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1101263|http://msdn.microsoft.com/en-us/library/system.net.webclient(VS.80).aspx|offset|length|1101264|在本例中，您需要UploadData()方法。(同样，文档中包含了一个代码示例)|1101265|http://msdn.microsoft.com/en-us/library/tdbbwh0a(VS.80).aspx|1101266|UploadString()可能也会起作用，它把它抽象了一个层次。|1101267|http://msdn.microsoft.com/en-us/library/system.net.webclient.uploadstring(VS.80).aspx|1101268|entityMap|0|LINK|mutability|MUTABLE|url|1|2^0|0|0|20|0|0|0|0|1O|1|0|0|0|2D|2|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|X|8|@]|9|@$D|Y|E|Z|1|10]]|A|$]]|$1|F|3|G|5|6|7|11|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|12|8|@]|9|@$D|13|E|14|1|15]]|A|$]]|$1|J|3|K|5|6|7|16|8|@]|9|@]|A|$]]|$1|L|3|M|5|6|7|17|8|@]|9|@$D|18|E|19|1|1A]]|A|$]]|$1|N|3|-4|5|6|7|1B|8|@]|9|@]|A|$]]]|O|$P|$5|Q|R|S|A|$T|C]]|U|$5|Q|R|S|A|$T|I]]|V|$5|Q|R|S|A|$T|M]]]]

Personally, I think the simplest approach to do an http post and get the response is to use the WebClient class. This class nicely abstracts the details. There's even a full code example in the MSDN documentation.

<a href="http://msdn.microsoft.com/en-us/library/system.net.webclient(VS.80).aspx" rel="noreferrer">http://msdn.microsoft.com/en-us/library/system.net.webclient(VS.80).aspx</a>

In your case, you want the UploadData() method. (Again, a code sample is included in the documentation)

<a href="http://msdn.microsoft.com/en-us/library/tdbbwh0a(VS.80).aspx" rel="noreferrer">http://msdn.microsoft.com/en-us/library/tdbbwh0a(VS.80).aspx</a>

UploadString() will probably work as well, and it abstracts it away one more level.

<a href="http://msdn.microsoft.com/en-us/library/system.net.webclient.uploadstring(VS.80).aspx" rel="noreferrer">http://msdn.microsoft.com/en-us/library/system.net.webclient.uploadstring(VS.80).aspx</a>

blocks|key|1101283|text|private+void+PostForm()
{
++++HttpWebRequest+request+=+(HttpWebRequest)WebRequest.Create("http://dork.com/service");
++++request.Method+=+"POST";
++++request.ContentType+=+"application/x-www-form-urlencoded";
++++string+postData+="home=Cosby&favorite%2Bflavor=flies";
++++byte[]+bytes+=+Encoding.UTF8.GetBytes(postData);
++++request.ContentLength+=+bytes.Length;

++++Stream+requestStream+=+request.GetRequestStream();
++++requestStream.Write(bytes,+0,+bytes.Length);

++++WebResponse+response+=+request.GetResponse();
++++Stream+stream+=+response.GetResponseStream();
++++StreamReader+reader+=+new+StreamReader(stream);

++++var+result+=+reader.ReadToEnd();
++++stream.Dispose();
++++reader.Dispose();
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1101284|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>private void PostForm()
{
 HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://dork.com/service");
 request.Method = "POST";
 request.ContentType = "application/x-www-form-urlencoded";
 string postData ="home=Cosby&amp;favorite+flavor=flies";
 byte[] bytes = Encoding.UTF8.GetBytes(postData);
 request.ContentLength = bytes.Length;

 Stream requestStream = request.GetRequestStream();
 requestStream.Write(bytes, 0, bytes.Length);

 WebResponse response = request.GetResponse();
 Stream stream = response.GetResponseStream();
 StreamReader reader = new StreamReader(stream);

 var result = reader.ReadToEnd();
 stream.Dispose();
 reader.Dispose();
}
</code></pre>

blocks|key|886540|text|+++using+(WebClient+client+=+new+WebClient())
+++{

+++++++byte[]+response+=
+++++++client.UploadValues("http://dork.com/service",+new+NameValueCollection()
+++++++{
+++++++++++{+"home",+"Cosby"+},
+++++++++++{+"favorite%2Bflavor",+"flies"+}
+++++++});

+++++++string+result+=+System.Text.Encoding.UTF8.GetString(response);
+++}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|886541|您将需要以下内容：|unstyled|886542|using+System;
using+System.Collections.Specialized;
using+System.Net;|886543|如果您坚持使用静态方法/类：|886544|public+static+class+Http
{
++++public+static+byte[]+Post(string+uri,+NameValueCollection+pairs)
++++{
++++++++byte[]+response+=+null;
++++++++using+(WebClient+client+=+new+WebClient())
++++++++{
++++++++++++response+=+client.UploadValues(uri,+pairs);
++++++++}
++++++++return+response;
++++}
}|886545|然后简单地说：|886546|var+response+=+Http.Post("http://dork.com/service",+new+NameValueCollection()+{
++++{+"home",+"Cosby"+},
++++{+"favorite%2Bflavor",+"flies"+}
});|886547|entityMap^0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|T|8|@]|9|@]|A|$]]|$1|G|3|H|5|6|7|U|8|@]|9|@]|A|$B|C]]|$1|I|3|J|5|F|7|V|8|@]|9|@]|A|$]]|$1|K|3|L|5|6|7|W|8|@]|9|@]|A|$B|C]]|$1|M|3|N|5|F|7|X|8|@]|9|@]|A|$]]|$1|O|3|P|5|6|7|Y|8|@]|9|@]|A|$B|C]]|$1|Q|3|-4|5|F|7|Z|8|@]|9|@]|A|$]]]|R|$]]

<pre><code> using (WebClient client = new WebClient())
 {

 byte[] response =
 client.UploadValues("http://dork.com/service", new NameValueCollection()
 {
 { "home", "Cosby" },
 { "favorite+flavor", "flies" }
 });

 string result = System.Text.Encoding.UTF8.GetString(response);
 }
</code></pre>

You will need these includes:

<pre><code>using System;
using System.Collections.Specialized;
using System.Net;
</code></pre>

If you're insistent on using a static method/class:

<pre><code>public static class Http
{
 public static byte[] Post(string uri, NameValueCollection pairs)
 {
 byte[] response = null;
 using (WebClient client = new WebClient())
 {
 response = client.UploadValues(uri, pairs);
 }
 return response;
 }
}
</code></pre>

Then simply:

<pre><code>var response = Http.Post("http://dork.com/service", new NameValueCollection() {
 { "home", "Cosby" },
 { "favorite+flavor", "flies" }
});
</code></pre>

blocks|key|1101375|text|您可以使用类似如下的伪代码：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1101376|request+=+System.Net.HttpWebRequest.Create(your+url)
request.Method+=+WebRequestMethods.Http.Post

writer+=+New+System.IO.StreamWriter(request.GetRequestStream())
writer.Write("your+data")
writer.Close()

response+=+request.GetResponse()
reader+=+New+System.IO.StreamReader(response.GetResponseStream())
responseText+=+reader.ReadToEnd|code-block|syntax|javascript|1101377|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|$]]

You can use something like this pseudo code:

<pre><code>request = System.Net.HttpWebRequest.Create(your url)
request.Method = WebRequestMethods.Http.Post

writer = New System.IO.StreamWriter(request.GetRequestStream())
writer.Write("your data")
writer.Close()

response = request.GetResponse()
reader = New System.IO.StreamReader(response.GetResponseStream())
responseText = reader.ReadToEnd
</code></pre>

blocks|key|1101429|text|使用HttpClient:就Windows8应用程序开发而言，我遇到了这个问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1101430|var+client+=+new+HttpClient();

var+pairs+=+new+List<KeyValuePair<string,+string>>
++++{
++++++++new+KeyValuePair<string,+string>("pqpUserName",+"admin"),
++++++++new+KeyValuePair<string,+string>("password",+"test@123")
++++};

var+content+=+new+FormUrlEncodedContent(pairs);

var+response+=+client.PostAsync("youruri",+content).Result;

if+(response.IsSuccessStatusCode)
{


}|code-block|syntax|javascript|1101431|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|$]]

Using HttpClient: as far as Windows 8 app development concerns, I came across this.

<pre><code>var client = new HttpClient();

var pairs = new List&lt;KeyValuePair&lt;string, string&gt;&gt;
 {
 new KeyValuePair&lt;string, string&gt;("pqpUserName", "admin"),
 new KeyValuePair&lt;string, string&gt;("password", "test@123")
 };

var content = new FormUrlEncodedContent(pairs);

var response = client.PostAsync("youruri", content).Result;

if (response.IsSuccessStatusCode)
{


}
</code></pre>

blocks|key|1101483|text|我知道这是一个古老的帖子，但希望它能对某些人有所帮助。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1101484|public+static+void+SetRequest(string+mXml)
{
++++HttpWebRequest+webRequest+=+(HttpWebRequest)HttpWebRequest.CreateHttp("http://dork.com/service");
++++webRequest.Method+=+"POST";
++++webRequest.Headers["SOURCE"]+=+"WinApp";

++++//+Decide+your+encoding+here

++++//webRequest.ContentType+=+"application/x-www-form-urlencoded";
++++webRequest.ContentType+=+"text/xml;+charset=utf-8";

++++//+You+should+setContentLength
++++byte[]+content+=+System.Text.Encoding.UTF8.GetBytes(mXml);
++++webRequest.ContentLength+=+content.Length;

++++var+reqStream+=+await+webRequest.GetRequestStreamAsync();
++++reqStream.Write(content,+0,+content.Length);

++++var+res+=+await+httpRequest(webRequest);
}|code-block|syntax|javascript|1101485|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|$]]

I know this is an old thread, but hope it helps some one.

<pre><code>public static void SetRequest(string mXml)
{
 HttpWebRequest webRequest = (HttpWebRequest)HttpWebRequest.CreateHttp("http://dork.com/service");
 webRequest.Method = "POST";
 webRequest.Headers["SOURCE"] = "WinApp";

 // Decide your encoding here

 //webRequest.ContentType = "application/x-www-form-urlencoded";
 webRequest.ContentType = "text/xml; charset=utf-8";

 // You should setContentLength
 byte[] content = System.Text.Encoding.UTF8.GetBytes(mXml);
 webRequest.ContentLength = content.Length;

 var reqStream = await webRequest.GetRequestStreamAsync();
 reqStream.Write(content, 0, content.Length);

 var res = await httpRequest(webRequest);
}
</code></pre>

To my surprise, I can't do anything nearly as simple as this, from what I can tell, in the .NET BCL:

<pre><code>byte[] response = Http.Post
(
 url: "http://dork.com/service",
 contentType: "application/x-www-form-urlencoded",
 contentLength: 32,
 content: "home=Cosby&amp;favorite+flavor=flies"
);
</code></pre>

This hypothetical code above makes an HTTP POST, with data, and returns the response from a <code>Post</code> method on a static class <code>Http</code>.

Since we're left without something this easy, what's the next best solution?

How do I send an HTTP POST with data AND get the response's content?

.NET: Simplest way to send POST with data and read response

令我惊讶的是，在.NET BCL中，我几乎不能做这样简单的事情：byte[] response = Http.Post(    url: "http://dork.com/service",    contentType: "application/x-www-form-urlencoded",    contentL...

问.NET:发送带有数据和读取响应的POST的最简单方式
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