Uri.IsLoopback 属性

定义

命名空间:
System
程序集:
System.dll, System.Runtime.dll
程序集:
netstandard.dll, System.Runtime.dll
程序集:
System.Runtime.dll
程序集:
System.dll
程序集:
netstandard.dll
Source:
Uri.cs
Source:
Uri.cs
Source:
Uri.cs
Source:
Uri.cs
Source:
Uri.cs

获取一个值，该值指示指定的 Uri 是否引用本地主机。

public:
 property bool IsLoopback { bool get(); };
public bool IsLoopback { get; }
member this.IsLoopback : bool
Public ReadOnly Property IsLoopback As Boolean

属性值

Boolean

如果引用本地主机，则为 ;否则为 。

例外

InvalidOperationException

此实例表示相对 URI，此属性仅对绝对 URI 有效。

示例

以下示例创建一个 Uri 实例，并确定它是否引用本地主机。

Uri uriAddress2 =  new Uri("file://server/filename.ext");
Console.WriteLine(uriAddress2.LocalPath);
Console.WriteLine("Uri {0} a UNC path", uriAddress2.IsUnc ? "is" : "is not");
Console.WriteLine("Uri {0} a local host", uriAddress2.IsLoopback ? "is" : "is not");
Console.WriteLine("Uri {0} a file", uriAddress2.IsFile ? "is" : "is not");
// The example displays the following output:
//    \\server\filename.ext
//    Uri is a UNC path
//    Uri is not a local host
//    Uri is a file

let uriAddress2 = Uri "file://server/filename.ext"
printfn $"{uriAddress2.LocalPath}"
printfn $"""Uri {if uriAddress2.IsUnc then "is" else "is not"} a UNC path"""
printfn $"""Uri {if uriAddress2.IsLoopback then "is" else "is not"} a local host"""
printfn $"""Uri {if uriAddress2.IsFile then "is" else "is not"} a file"""
// The example displays the following output:
//    \\server\filename.ext
//    Uri is a UNC path
//    Uri is not a local host
//    Uri is a file

Dim uriAddress2 As New Uri("file://server/filename.ext")
Console.WriteLine(uriAddress2.LocalPath)
Console.WriteLine("Uri {0} a UNC path", IIf(uriAddress2.IsUnc, "is", "is not")) 'TODO: For performance reasons this should be changed to nested IF statements
Console.WriteLine("Uri {0} a local host", IIf(uriAddress2.IsLoopback, "is", "is not")) 'TODO: For performance reasons this should be changed to nested IF statements
Console.WriteLine("Uri {0} a file", IIf(uriAddress2.IsFile, "is", "is not")) 'TODO: For performance reasons this should be changed to nested IF statements
' The example displays the following output:
'    \\server\filename.ext
'    Uri is a UNC path
'    Uri is not a local host
'    Uri is a file

注解

IsLoopback 如果 true 创建此实例时指定的 URI 为 127.0.0.1、环回或 localhost，或者 URI 未指定主机信息（例如，file:///c:Dir/file.txt）。 所有其他 URI 返回 false。

适用于