blocks|key|1601787|text|使用返回NameValueCollection的System.Web.HttpUtility类的静态ParseQueryString方法。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1601788|Uri+myUri+=+new+Uri("http://www.example.com?param1=good&param2=bad");
string+param1+=+HttpUtility.ParseQueryString(myUri.Query).Get("param1");|code-block|syntax|javascript|1601789|请查看http://msdn.microsoft.com/en-us/library/ms150046.aspx上的文档|1601790|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/ms150046.aspx^0|4|J|O|M|1E|G|0|0|3|1H|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@$9|V|A|W|B|C]|$9|X|A|Y|B|C]|$9|Z|A|10|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|11|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|12|8|@]|D|@$9|13|A|14|1|15]]|E|$]]|$1|M|3|-4|5|6|7|16|8|@]|D|@]|E|$]]]|N|$O|$5|P|Q|R|E|$S|T]]]]

Use static <code>ParseQueryString</code> method of <code>System.Web.HttpUtility</code> class that returns <code>NameValueCollection</code>.

<pre><code>Uri myUri = new Uri("http://www.example.com?param1=good&amp;param2=bad");
string param1 = HttpUtility.ParseQueryString(myUri.Query).Get("param1");
</code></pre>

Check documentation at <a href="http://msdn.microsoft.com/en-us/library/ms150046.aspx" rel="noreferrer">http://msdn.microsoft.com/en-us/library/ms150046.aspx</a>

blocks|key|1386971|text|使用.NET反射器查看System.Web.HttpValueCollection的FillFromString方法。这就给出了ASP.NET用来填充Request.QueryString集合的代码。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1386972|entityMap^0|B|U|16|E|23|J|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]|$9|M|A|N|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|O|8|@]|D|@]|E|$]]]|G|$]]

Use .NET Reflector to view the <code>FillFromString</code> method of <code>System.Web.HttpValueCollection</code>. That gives you the code that ASP.NET is using to fill the <code>Request.QueryString</code> collection.

blocks|key|1386992|text|这可能就是你想要的|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1386993|var+uri+=+new+Uri("http://domain.test/Default.aspx?var1=true&var2=test&var3=3");
var+query+=+HttpUtility.ParseQueryString(uri.Query);

var+var2+=+query.Get("var2");|code-block|syntax|javascript|1386994|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|$]]

This is probably what you want

<pre><code>var uri = new Uri("http://domain.test/Default.aspx?var1=true&amp;var2=test&amp;var3=3");
var query = HttpUtility.ParseQueryString(uri.Query);

var var2 = query.Get("var2");
</code></pre>

blocks|key|1387036|text|@Andrew和@CZFox|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1387037|我遇到了同样的bug，并发现原因是参数1实际上是：http://www.example.com?param1，而不是param1，这是人们所期望的。|offset|length|style|CODE|1387038|通过删除问号前面的所有字符并包括问号，可以解决此问题。因此，实际上，HttpUtility.ParseQueryString函数只需要一个有效的查询字符串参数，该参数仅包含问号后面的字符，如下所示：|1387039|HttpUtility.ParseQueryString+(+"param1=good&param2=bad"+)|code-block|syntax|javascript|1387040|我的解决方法：|1387041|string+RawUrl+=+"http://www.example.com?param1=good&param2=bad";
int+index+=+RawUrl.IndexOf+(+"?"+);
if+(+index+>+0+)
++++RawUrl+=+RawUrl.Substring+(+index+).Remove+(+0,+1+);

Uri+myUri+=+new+Uri(+RawUrl,+UriKind.RelativeOrAbsolute);
string+param1+=+HttpUtility.ParseQueryString(+myUri.Query+).Get(+"param1"+);`|1387042|entityMap^0|0|P|T|1M|6|0|Y|S|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|V|8|@$D|W|E|X|F|G]|$D|Y|E|Z|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|10|8|@$D|11|E|12|F|G]]|9|@]|A|$]]|$1|J|3|K|5|L|7|13|8|@]|9|@]|A|$M|N]]|$1|O|3|P|5|6|7|14|8|@]|9|@]|A|$]]|$1|Q|3|R|5|L|7|15|8|@]|9|@]|A|$M|N]]|$1|S|3|-4|5|6|7|16|8|@]|9|@]|A|$]]]|T|$]]

@Andrew and @CZFox 

I had the same bug and found the cause to be that parameter one is in fact: <code>http://www.example.com?param1</code> and not <code>param1</code> which is what one would expect.

By removing all characters before and including the question mark fixes this problem. So in essence the <code>HttpUtility.ParseQueryString</code> function only requires a valid query string parameter containing only characters after the question mark as in:

<pre><code>HttpUtility.ParseQueryString ( "param1=good&amp;param2=bad" )
</code></pre>

My workaround:

<pre><code>string RawUrl = "http://www.example.com?param1=good&amp;param2=bad";
int index = RawUrl.IndexOf ( "?" );
if ( index &gt; 0 )
 RawUrl = RawUrl.Substring ( index ).Remove ( 0, 1 );

Uri myUri = new Uri( RawUrl, UriKind.RelativeOrAbsolute);
string param1 = HttpUtility.ParseQueryString( myUri.Query ).Get( "param1" );`
</code></pre>

blocks|key|1601888|text|您也可以使用以下解决方法来处理第一个参数：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1601889|var+param1+=
++++HttpUtility.ParseQueryString(url.Substring(
++++++++new+[]{0,+url.IndexOf('?')}.Max()
++++)).Get("param1");|code-block|syntax|javascript|1601890|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 the following workaround for it to work with the first parameter too:

<pre><code>var param1 =
 HttpUtility.ParseQueryString(url.Substring(
 new []{0, url.IndexOf('?')}.Max()
 )).Get("param1");
</code></pre>

blocks|key|1387091|text|如果你想在默认页面上获取QueryString，.Default页面就是你当前页面的url。你可以试试这段代码：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1387092|string+paramIl+=+HttpUtility.ParseQueryString(this.ClientQueryString).Get("city");|code-block|syntax|javascript|1387093|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 want in get your QueryString on Default page .Default page means your current page url . 
you can try this code : 

<pre><code>string paramIl = HttpUtility.ParseQueryString(this.ClientQueryString).Get("city");
</code></pre>

blocks|key|1387097|text|HttpContext.Current.Request.QueryString.Get("id");|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1387098|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>HttpContext.Current.Request.QueryString.Get("id");
</code></pre>

blocks|key|1387132|text|或者，如果您不知道网址(为了避免硬编码，请使用AbsoluteUri|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1387133|例如。|1387134|++++++++//get+the+full+URL
++++++++Uri+myUri+=+new+Uri(Request.Url.AbsoluteUri);
++++++++//get+any+parameters
++++++++string+strStatus+=+HttpUtility.ParseQueryString(myUri.Query).Get("status");
++++++++string+strMsg+=+HttpUtility.ParseQueryString(myUri.Query).Get("message");
++++++++switch+(strStatus.ToUpper())
++++++++{
++++++++++++case+"OK":
++++++++++++++++webMessageBox.Show("EMAILS+SENT!");
++++++++++++++++break;
++++++++++++case+"ER":
++++++++++++++++webMessageBox.Show("EMAILS+SENT,+BUT+...+"+%2B+strMsg);
++++++++++++++++break;
++++++++}|code-block|syntax|javascript|1387135|entityMap^0|N|B|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|R|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|S|8|@]|D|@]|E|$K|L]]|$1|M|3|-4|5|6|7|T|8|@]|D|@]|E|$]]]|N|$]]

Or if you don't know the URL (so as to avoid hardcoding, use the <code>AbsoluteUri</code>

Example ...

<pre><code> //get the full URL
 Uri myUri = new Uri(Request.Url.AbsoluteUri);
 //get any parameters
 string strStatus = HttpUtility.ParseQueryString(myUri.Query).Get("status");
 string strMsg = HttpUtility.ParseQueryString(myUri.Query).Get("message");
 switch (strStatus.ToUpper())
 {
 case "OK":
 webMessageBox.Show("EMAILS SENT!");
 break;
 case "ER":
 webMessageBox.Show("EMAILS SENT, BUT ... " + strMsg);
 break;
 }
</code></pre>

blocks|key|1387164|text|我用了它，它运行得很好。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1387165|<%25=Request.QueryString["id"]+%25>|code-block|syntax|javascript|1387166|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 used it and it run perfectly 

<pre><code>&lt;%=Request.QueryString["id"] %&gt;
</code></pre>

blocks|key|1387203|text|这实际上非常简单，这对我很有效:)|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1387204|++++++++if+(id+==+"DK")
++++++++{
++++++++++++string+longurl+=+"selectServer.aspx?country=";
++++++++++++var+uriBuilder+=+new+UriBuilder(longurl);
++++++++++++var+query+=+HttpUtility.ParseQueryString(uriBuilder.Query);
++++++++++++query["country"]+=+"DK";

++++++++++++uriBuilder.Query+=+query.ToString();
++++++++++++longurl+=+uriBuilder.ToString();
++++++++}+|code-block|syntax|javascript|1387205|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|$]]

This is actually very simple, and that worked for me :)

<pre><code> if (id == "DK")
 {
 string longurl = "selectServer.aspx?country=";
 var uriBuilder = new UriBuilder(longurl);
 var query = HttpUtility.ParseQueryString(uriBuilder.Query);
 query["country"] = "DK";

 uriBuilder.Query = query.ToString();
 longurl = uriBuilder.ToString();
 } 
</code></pre>

blocks|key|1602075|text|适用于希望循环访问字符串中的所有查询字符串的任何人|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1602076|++++++++foreach+(var+item+in+new+Uri(urlString).Query.TrimStart('?').Split('&'))
++++++++{
++++++++++++var+subStrings+=+item.Split('=');

++++++++++++var+key+=+subStrings[0];
++++++++++++var+value+=+subStrings[1];

++++++++++++//+do+something+with+values
++++++++}|code-block|syntax|javascript|1602077|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|$]]

For anyone who wants to loop through all query strings from a string

<pre><code> foreach (var item in new Uri(urlString).Query.TrimStart('?').Split('&amp;'))
 {
 var subStrings = item.Split('=');

 var key = subStrings[0];
 var value = subStrings[1];

 // do something with values
 }
</code></pre>

blocks|key|1387270|text|单线LINQ解决方案：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1387271|Dictionary<string,+string>+ParseQueryString(string+query)
{
++++return+query.Replace("?",+"").Split('&').ToDictionary(pair+=>+pair.Split('=').First(),+pair+=>+pair.Split('=').Last());
}|code-block|syntax|javascript|1387272|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|$]]

Single line LINQ solution:
<pre><code>Dictionary&lt;string, string&gt; ParseQueryString(string query)
{
 return query.Replace(&quot;?&quot;, &quot;&quot;).Split('&amp;').ToDictionary(pair =&gt; pair.Split('=').First(), pair =&gt; pair.Split('=').Last());
}
</code></pre>

I've got a string in .NET which is actually a URL. I want an easy way to get the value from a particular parameter.
Normally, I'd just use <code>Request.Params[&quot;theThingIWant&quot;]</code>, but this string isn't from the request. I can create a new <code>Uri</code> item like so:
<pre><code>Uri myUri = new Uri(TheStringUrlIWantMyValueFrom);
</code></pre>
I can use <code>myUri.Query</code> to get the query string...but then I apparently have to find some regexy way of splitting it up.
Am I missing something obvious, or is there no built in way to do this short of creating a regex of some kind, etc?

Get URL parameters from a string in .NET

我在.NET中有一个字符串，它实际上是一个网址。我想要一种从特定参数中获取值的简单方法。通常，我只使用Request.Params["theThingIWant"]，但是这个字符串不是来自请求。我可以创建一个新的Uri项目，如下所示：Uri myUri = new Uri(TheStringUrlIWantMyValu...

问从.NET中的字符串获取URL参数
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