blocks|key|131850|text|var+builder+=+new+UriBuilder("http://www.example.com/mypage/default.aspx");
builder.Path+=+String.Empty;
var+baseUri+=+builder.Uri;
var+baseUrl+=+baseUri.ToString();
//+http://www.example.com/|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|131851|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>var builder = new UriBuilder("http://www.example.com/mypage/default.aspx");
builder.Path = String.Empty;
var baseUri = builder.Uri;
var baseUrl = baseUri.ToString();
// http://www.example.com/
</code></pre>

blocks|key|349880|text|如果你想把这3个都放在一个列表中，你也可以从这里开始。一旦你得到了Host+Name，你可以做很多的事情。如果你想要得到.com之外的所有东西，使用AbsolutePath方法|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|349881|var+uriList+=+new+List<string>()
++++++++++++{
++++++++++++++++"http://www.mysite.com/mypage/default.aspx",
++++++++++++++++"http://www.mysite.edu/mypage/default.aspx",
++++++++++++++++"http://www.mysite.eu/mypage/default.aspx"
++++++++++++};
++++++++var+holdList+=+new+List<string>();
++++++++foreach+(var+uriName+in+uriList)
++++++++{
++++++++++++Uri+uri+=+new+Uri(uriName);
++++++++++++holdList.Add(uri.Host);
++++++++}|code-block|syntax|javascript|349882|entityMap^0|X|9|1O|4|22|C|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]|$9|P|A|Q|B|C]|$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|T|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|U|8|@]|D|@]|E|$]]]|L|$]]

If you want to get all 3 of them in a list here is something you could also start with
there are so many options you can do once you get the <code>Host Name</code> also if you are wanting everything past the <code>.com</code> use the <code>AbsolutePath</code> method 

<pre><code>var uriList = new List&lt;string&gt;()
 {
 "http://www.mysite.com/mypage/default.aspx",
 "http://www.mysite.edu/mypage/default.aspx",
 "http://www.mysite.eu/mypage/default.aspx"
 };
 var holdList = new List&lt;string&gt;();
 foreach (var uriName in uriList)
 {
 Uri uri = new Uri(uriName);
 holdList.Add(uri.Host);
 }
</code></pre>

blocks|key|349906|text|只需为Uri类创建一个扩展。在我看来，从一开始就应该有的东西。它会让你的生活变得更轻松。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|349907|public+static+class+UriExtensions
+{+++++++++++++++++++
++++public+static+Uri+AttachParameters(this+Uri+uri,+
+++++++++++++++++++++++++++++++++++++++NameValueCollection+parameters)
++++{
++++++++var+stringBuilder+=+new+StringBuilder();
++++++++string+str+=+"?";
++++++++for+(int+index+=+0;+index+<+parameters.Count;+%2B%2Bindex)
++++++++{
++++++++++++stringBuilder.Append(str+%2B+
++++++++++++++++System.Net.WebUtility.UrlEncode(parameters.AllKeys[index])+%2B
+++++++++++++++++"="+%2B+System.Net.WebUtility.UrlEncode(parameters[index]));
++++++++++++str+=+"&";
++++++++}
++++++++return+new+Uri(uri+%2B+stringBuilder.ToString());
++++}

++++public+static+string+GetBaseUrl(this+Uri+uri)+{
++++++++string+baseUrl+=+uri.Scheme+%2B+"://"+%2B+uri.Host;
++++++++return+baseUrl;
++++}

++++public+static+string+GetBaseUrl_Path(this+Uri+uri)+{
++++++++string+baseUrl+=+uri.Scheme+%2B+"://"+%2B+uri.Host+%2B+uri.AbsolutePath;
++++++++return+baseUrl;
++++}
+}|code-block|syntax|javascript|349908|用法：|349909|//url+-++https://example.com/api/rest/example?firstname=Linus&lastname=Trovalds
Uri+myUri+=+new+Uri("https://example.com/api/rest/example").AttachParameters(
++++++++++++new+NameValueCollection
++++++++++++{
++++++++++++++++{"firstname","Linus"},
++++++++++++++++{"lastname","Trovalds"}
++++++++++++}
++++++++++);
//+https://example.com
string+baseUrl+=+myUri.GetBaseUrl();
//+https://example.com/api/rest/example
string+baseUrlandPath+=+myUri.GetBaseUrl_Path();|349910|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

Just create an extension to the Uri class. In my opinion things that should be there from the start. It will make your life easier. 

<pre><code>public static class UriExtensions
 { 
 public static Uri AttachParameters(this Uri uri, 
 NameValueCollection parameters)
 {
 var stringBuilder = new StringBuilder();
 string str = "?";
 for (int index = 0; index &lt; parameters.Count; ++index)
 {
 stringBuilder.Append(str + 
 System.Net.WebUtility.UrlEncode(parameters.AllKeys[index]) +
 "=" + System.Net.WebUtility.UrlEncode(parameters[index]));
 str = "&amp;";
 }
 return new Uri(uri + stringBuilder.ToString());
 }

 public static string GetBaseUrl(this Uri uri) {
 string baseUrl = uri.Scheme + "://" + uri.Host;
 return baseUrl;
 }

 public static string GetBaseUrl_Path(this Uri uri) {
 string baseUrl = uri.Scheme + "://" + uri.Host + uri.AbsolutePath;
 return baseUrl;
 }
 }
</code></pre>

Usage: 

<pre><code>//url - https://example.com/api/rest/example?firstname=Linus&amp;lastname=Trovalds
Uri myUri = new Uri("https://example.com/api/rest/example").AttachParameters(
 new NameValueCollection
 {
 {"firstname","Linus"},
 {"lastname","Trovalds"}
 }
 );
// https://example.com
string baseUrl = myUri.GetBaseUrl();
// https://example.com/api/rest/example
string baseUrlandPath = myUri.GetBaseUrl_Path();
</code></pre>

I am currently working on a project with .NET 1.1 framework and I am stuck at this point. I have a string like "<a href="http://www.example.com/mypage/default.aspx">http://www.example.com/mypage/default.aspx</a>" or it might be "<a href="http://www.example.edu/mypage/default.aspx">http://www.example.edu/mypage/default.aspx</a>" or "<a href="http://www.example.eu/mypage/default.aspx">http://www.example.eu/mypage/default.aspx</a>". How can I extract the base URl from this kind of a string. 

Thanks

Extract base URl from a string in c#?

我目前正在做一个使用.NET 1.1框架的项目，我被困在这一点上。我有一个类似"“的字符串，也可能是"”或"“。如何从这种字符串中提取基本URl。谢谢

问从c#中的字符串中提取基本URl？
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