Path.IsPathFullyQualified 方法

定义

重载

注解

使用和字符的方法句柄路径DirectorySeparatorChar的IsPathFullyQualifiedAltDirectorySeparatorChar重载。 它不会对作为参数传递给它的路径执行任何验证。 因此，URI 被解释为相对路径并返回 false。

完全限定的路径（由 IsPathFullyQualified 方法指示）和根路径（由方法指示 IsPathRooted ）之间存在差异。 完全限定的路径或绝对路径始终定义从特定驱动器或设备到目标文件或目录的确切路径，并且不依赖于当前驱动器或当前目录。 例如，在Windows系统上，C：/users/user1/documents/reports/2019/january/highlights.pdf定义从 C： 驱动器的根目录到目标文件的绝对路径，highlights.pdf。 根路径指定起始驱动器或根目录，但取决于当前目录（如果由指定的驱动器进行根目录）或当前驱动器（如果由根目录进行根目录）。 以下示例说明了完全限定路径与根路径之间的差异。

using System;
using System.IO;

class Program
{
    static void Main()
    {
        string relative1 = "C:Documents"; 
        ShowPathInfo(relative1);

        string relative2 = "/Documents";
        ShowPathInfo(relative2);

        string absolute = "C:/Documents";
        ShowPathInfo(absolute);
    }

    private static void ShowPathInfo(string path)
    {
        Console.WriteLine($"Path: {path}");
        Console.WriteLine($"   Rooted: {Path.IsPathRooted(path)}");
        Console.WriteLine($"   Fully qualified: {Path.IsPathFullyQualified(path)}");
        Console.WriteLine($"   Full path: {Path.GetFullPath(path)}");
        Console.WriteLine();
    }
}
// The example displays the following output when run on a Windows system:
//    Path: C:Documents
//        Rooted: True
//        Fully qualified: False
//        Full path: c:\Users\user1\Documents\projects\path\ispathrooted\Documents
//
//    Path: /Documents
//       Rooted: True
//       Fully qualified: False
//       Full path: c:\Documents
//
//    Path: C:/Documents
//       Rooted: True
//       Fully qualified: True
//       Full path: C:\Documents

Imports System.IO

Module Program
    Public Sub Main()
        Dim relative1 As String = "C:Documents" 
        ShowPathInfo(relative1)

        Dim relative2 As String = "C:Documents" 
        ShowPathInfo(relative2)

        Dim absolute As String = "C:/Documents"
        ShowPathInfo(absolute)
    End Sub

    Private Sub ShowPathInfo(filepath As String)
        Console.WriteLine($"Path: {filepath}")
        Console.WriteLine($"   Rooted: {Path.IsPathRooted(filepath)}")
        Console.WriteLine($"   Fully qualified: {Path.IsPathFullyQualified(filepath)}")
        Console.WriteLine($"   Full path: {Path.GetFullPath(filepath)}")
        Console.WriteLine()
    End Sub
End Module
' The example displays the following output when run on a Windows system:
'    Path: C:Documents
'        Rooted: True
'        Fully qualified: False
'        Full path: c:\Users\user1\Documents\projects\path\ispathrooted\Documents
'
'    Path: /Documents
'       Rooted: True
'       Fully qualified: False
'       Full path: c:\Documents
'
'    Path: C:/Documents
'       Rooted: True
'       Fully qualified: True
'       Full path: C:\Documents

public:
 static bool IsPathFullyQualified(System::String ^ path);

public static bool IsPathFullyQualified(string path);

static member IsPathFullyQualified : string -> bool

Public Shared Function IsPathFullyQualified (path As String) As Boolean

public:
 static bool IsPathFullyQualified(ReadOnlySpan<char> path);

public static bool IsPathFullyQualified(ReadOnlySpan<char> path);

static member IsPathFullyQualified : ReadOnlySpan<char> -> bool

Public Shared Function IsPathFullyQualified (path As ReadOnlySpan(Of Char)) As Boolean