Uri Constructor (Uri, Uri)
Initializes a new instance of the Uri class based on the combination of a specified base Uri instance and a relative Uri instance.
Assembly: System (in System.dll)
Parameters
- baseUri
- Type: System.Uri
- relativeUri
-
Type:
System.Uri
A relative Uri instance that is combined with baseUri.
| Exception | Condition | ||
|---|---|---|---|
| ArgumentException | baseUri is not an absolute Uri instance. | ||
| ArgumentNullException | baseUri is null. | ||
| ArgumentOutOfRangeException | baseUri is not an absolute Uri instance. | ||
| UriFormatException |
The URI formed by combining baseUri and relativeUri is empty or contains only spaces. -or- The scheme specified in the URI formed by combining baseUri and relativeUri is not valid. -or- The URI formed by combining baseUri and relativeUri contains too many slashes. -or- The password specified in the URI formed by combining baseUri and relativeUri is not valid. -or- The host name specified in the URI formed by combining baseUri and relativeUri is not valid. -or- The file name specified in the URI formed by combining baseUri and relativeUri is not valid. -or- The user name specified in the URI formed by combining baseUri and relativeUri is not valid. -or- The host or authority name specified in the URI formed by combining baseUri and relativeUri cannot be terminated by backslashes. -or- The port number specified in the URI formed by combining baseUri and relativeUri is not valid or cannot be parsed. -or- The length of the URI formed by combining baseUri and relativeUri exceeds 65519 characters. -or- The length of the scheme specified in the URI formed by combining baseUri and relativeUri exceeds 1023 characters. -or- There is an invalid character sequence in the URI formed by combining baseUri and relativeUri. -or- The MS-DOS path specified in uriString must start with c:\\. |
This constructor creates a new Uri instance by combining an absolute Uri instance, baseUri, with a relative Uri instance, relativeUri. If relativeUri is an absolute Uri instance (containing a scheme, host name, and optionally a port number), the Uri instance is created using only relativeUri.
This constructor does not ensure that the Uri refers to an accessible resource.
This example creates an absolute Uri instance, absoluteUri, and a relative Uri instance, relativeUri. A new Uri instance, combinedUri, is then created from these two instances.
' Create an absolute Uri from a string.
Dim absoluteUri As New Uri("http://www.contoso.com/")
' Create a relative Uri from a string. allowRelative = true to allow for
' creating a relative Uri.
Dim relativeUri As New Uri("/catalog/shownew.htm?date=today")
' Check whether the new Uri is absolute or relative.
If Not relativeUri.IsAbsoluteUri Then
Console.WriteLine("{0} is a relative Uri.", relativeUri)
End If
' Create a new Uri from an absolute Uri and a relative Uri.
Dim combinedUri As New Uri(absoluteUri, relativeUri)
Console.WriteLine(combinedUri.AbsoluteUri)
End Sub 'SampleConstructor
Available since 8
.NET Framework
Available since 2.0
Portable Class Library
Supported in: portable .NET platforms
Silverlight
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
