Uri.IsBaseOf Method
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Namespace: System
Assembly: System (in System.dll)
Syntax
'Declaration
Public Function IsBaseOf ( _
uri As Uri _
) As Boolean
public bool IsBaseOf(
Uri uri
)
Parameters
- uri
Type: System.Uri
The specified Uri instance to test.
Return Value
Type: System.Boolean
true if the current Uri instance is a base of uri; otherwise, false.
Remarks
IsBaseOf is used to compare the current Uri instance to a specified Uri to determine whether this URI is a base for the specified Uri. When comparing two Uri objects to determine a base relationship, the user information (UserInfo) is not evaluated. When comparing two URIs (uri1 and uri2), uri1 is the base of uri2 if, when you ignore everything in uri2 after the last slash (/), the two URIs are identical. Using http://host/path/path/file?query as the base URI, the following table shows whether it is a base for other URIs.
URI |
http://host/path/path/file?query is base of |
|---|---|
http://host/path/path/file/ |
yes |
http://host/path/path/#fragment |
yes |
http://host/path/path/MoreDir/" |
yes |
http://host/path/path/OtherFile?Query |
yes |
http://host/path/path/ |
yes |
http://host/path/path/file |
yes |
http://host/path/path |
no |
http://host/path/path?query |
no |
http://host/path/path#Fragment |
no |
http://host/path/path2/ |
no |
http://host/path/path2/MoreDir |
no |
http://host/path/File |
no |
Examples
This example creates a Uri instance that represents a base Uri instance. It then creates a second Uri instance from a string. It calls IsBaseOf to determine whether the base instance is the base of the second instance. The outcome is written to the console.
' Create a base Uri.
Dim baseUri As New Uri("https://www.contoso.com/")
' Create a new Uri from a string.
Dim uriAddress As New Uri("https://www.contoso.com/index.htm?date=today")
' Determine whether BaseUri is a base of UriAddress.
If baseUri.IsBaseOf(uriAddress) Then
Console.WriteLine("{0} is the base of {1}", baseUri, uriAddress)
End If
// Create a base Uri.
Uri baseUri = new Uri("https://www.contoso.com/");
// Create a new Uri from a string.
Uri uriAddress2 = new Uri("https://www.contoso.com/index.htm?date=today");
// Determine whether BaseUri is a base of UriAddress.
if (baseUri.IsBaseOf(uriAddress2)) {
outputBlock.Text += baseUri;
outputBlock.Text += " is the base of ";
outputBlock.Text += uriAddress2;
outputBlock.Text += "\n";
}
Version Information
Silverlight
Supported in: 5, 4, 3
Silverlight for Windows Phone
Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0
XNA Framework
Supported in: Xbox 360, Windows Phone OS 7.0
Platforms
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.