Uri.GetLeftPart(UriPartial) 方法

定义

命名空间:

System

程序集:

System.Runtime.dll

Source:

Uri.cs

获取 Uri 实例的指定部分。

public:
 System::String ^ GetLeftPart(UriPartial part);

public string GetLeftPart (UriPartial part);

member this.GetLeftPart : UriPartial -> string

Public Function GetLeftPart (part As UriPartial) As String

参数

part

UriPartial

指定要返回的 URI 部分末尾的枚举值之一。

返回

String

Uri 实例的指定部分。

例外

InvalidOperationException

当前 Uri 实例不是绝对实例。

ArgumentException

指定的 part 无效。

示例

以下示例创建 一个 Uri 实例，并将路径写入控制台。

// Create Uri
Uri^ uriAddress = gcnew Uri( "http://www.contoso.com/index.htm#search" );
Console::WriteLine( uriAddress->Fragment );
Console::WriteLine( "Uri {0} the default port ", uriAddress->IsDefaultPort ? (String^)"uses" : "does not use" );

Console::WriteLine( "The path of this Uri is {0}", uriAddress->GetLeftPart( UriPartial::Path ) );
Console::WriteLine( "Hash code {0}", uriAddress->GetHashCode() );
// The example displays output similar to the following:
//        #search
//        Uri uses the default port
//        The path of this Uri is http://www.contoso.com/index.htm
//        Hash code -988419291

// Create Uri
Uri uriAddress = new Uri("http://www.contoso.com/index.htm#search");
Console.WriteLine(uriAddress.Fragment);
Console.WriteLine("Uri {0} the default port ", uriAddress.IsDefaultPort ? "uses" : "does not use");

Console.WriteLine("The path of this Uri is {0}", uriAddress.GetLeftPart(UriPartial.Path));
Console.WriteLine("Hash code {0}", uriAddress.GetHashCode());
// The example displays output similar to the following:
//        #search
//        Uri uses the default port
//        The path of this Uri is http://www.contoso.com/index.htm
//        Hash code -988419291

// Create Uri
let uriAddress = Uri "http://www.contoso.com/index.htm#search"
printfn $"{uriAddress.Fragment}"
printfn $"""Uri {if uriAddress.IsDefaultPort then "uses" else "does not use"} the default port """

printfn $"The path of this Uri is {uriAddress.GetLeftPart UriPartial.Path}"
printfn $"Hash code {uriAddress.GetHashCode()}"
// The example displays output similar to the following:
//        #search
//        Uri uses the default port
//        The path of this Uri is http://www.contoso.com/index.htm
//        Hash code -988419291

' Create Uri
Dim uriAddress As New Uri("http://www.contoso.com/index.htm#search")
Console.WriteLine(uriAddress.Fragment)
Console.WriteLine("Uri {0} the default port ", If(uriAddress.IsDefaultPort, "uses", "does not use")) 

Console.WriteLine("The path of this Uri is {0}", uriAddress.GetLeftPart(UriPartial.Path))
Console.WriteLine("Hash code {0}", uriAddress.GetHashCode())
' The example displays output similar to the following:
'        #search
'        Uri uses the default port
'        The path of this Uri is http://www.contoso.com/index.htm
'        Hash code -988419291

注解

方法 GetLeftPart 返回一个字符串，其中包含 URI 字符串的最左侧部分，以 指定的 part部分结尾。

GetLeftPart 在以下情况下包括分隔符：

• Scheme 包括方案分隔符。
• Authority 不包括路径分隔符。
• Path 包括路径分隔符以及原始 URI 中到查询或片段分隔符的任何分隔符。
• Query 包括 ， Path以及查询及其分隔符。

以下示例演示 URI 以及使用 Scheme、Authority、 Path或 Query调用 GetLeftPart 的结果。

URI	Scheme	颁发机构	路径	查询
http://www.contoso.com/index.htm?date=today	http://	http://www.contoso.com	http://www.contoso.com/index.htm	http://www.contoso.com/index.htm?date=today
http://www.contoso.com/index.htm#main	http://	http://www.contoso.com	http://www.contoso.com/index.htm	http://www.contoso.com/index.htm
mailto:user@contoso.com?subject=uri	mailto:	<none>	mailto:user@contoso.com	mailto:user@contoso.com?subject=uri
nntp://news.contoso.com/123456@contoso.com	nntp://	nntp://news.contoso.com	nntp://news.contoso.com/123456@contoso.com	nntp://news.contoso.com/123456@contoso.com
news:123456@contoso.com	news:	<none>	news:123456@contoso.com	news:123456@contoso.com
file://server/filename.ext	file://	file://server	file://server/filename.ext	file://server/filename.ext