Uri.MakeRelativeUri(Uri) Method

Reference

Definition

Namespace:: System

Assemblies:: System.dll, System.Runtime.dll

Assemblies:: netstandard.dll, System.Runtime.dll

Assembly:: System.Runtime.dll

Assembly:: System.dll

Assembly:: netstandard.dll

Source:: Uri.cs

Source:: Uri.cs

Source:: Uri.cs

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Determines the difference between two Uri instances.

public:
 Uri ^ MakeRelativeUri(Uri ^ uri);

public Uri MakeRelativeUri(Uri uri);

member this.MakeRelativeUri : Uri -> Uri

Public Function MakeRelativeUri (uri As Uri) As Uri

Parameters

uri: Uri

The URI to compare to the current URI.

Returns

Uri

If the hostname and scheme of this URI instance and uri are the same, then this method returns a relative Uri that, when appended to the current URI instance, yields uri.

If the hostname or scheme is different, then this method returns a Uri that represents the uri parameter.

Exceptions

ArgumentNullException

uri is null.

InvalidOperationException

This instance represents a relative URI, and this property is valid only for absolute URIs.

Examples

The following example creates 2 Uri instances. The difference in the path information is written to the console.

// Create a base Uri.
Uri^ address1 = gcnew Uri( "http://www.contoso.com/" );

// Create a new Uri from a string.
Uri^ address2 = gcnew Uri( "http://www.contoso.com/index.htm?date=today" );

// Determine the relative Uri.  
Console::WriteLine( "The difference is {0}", address1->MakeRelativeUri( address2 ) );

// Create a base Uri.
Uri address1 = new Uri("http://www.contoso.com/");

// Create a new Uri from a string.
Uri address2 = new Uri("http://www.contoso.com/index.htm?date=today");

// Determine the relative Uri.
Console.WriteLine("The difference is {0}", address1.MakeRelativeUri(address2));

// Create a base Uri.
let address1 = Uri "http://www.contoso.com/"

// Create a new Uri from a string.
let address2 = Uri "http://www.contoso.com/index.htm?date=today"

// Determine the relative Uri.
printfn $"The difference is {address1.MakeRelativeUri address2}"

    ' Create a base Uri.
    Dim address1 As New Uri("http://www.contoso.com/")
    
    ' Create a new Uri from a string.
    Dim address2 As New Uri("http://www.contoso.com/index.htm?date=today")
    
    ' Determine the relative Uri.  
    Console.WriteLine("The difference is {0}", address1.MakeRelativeUri(address2))

End Sub

Remarks

The following table shows the URI instance, toUri, and the results of calling MakeRelativeUri.

Current URI instance	`toUri`	Return value
`http://www.contoso.com/`	`http://www.contoso.com/test/test.htm`	`test/test.htm`
`http://www.contoso.com/test1/`	`http://www.contoso.com/`	`../`
`http://www.contoso.com:8000/`	`http://www.contoso.com/test/test.htm`	`http://www.contoso.com/test/test.htm`
`http://username@www.contoso.com/`	`http://www.contoso.com/test1/test1.txt`	`test1/test1.txt`

User information, if present in the URI, is ignored.

Applies to

Продукт	Версии
.NET	Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10
.NET Framework	2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
.NET Standard	1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1
UWP	10.0

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