WebPermission.FromXml Method (SecurityElement)

 

Reconstructs a WebPermission from an XML encoding.

Namespace:   System.Net
Assembly:  System (in System.dll)

Public Overrides Sub FromXml (
	securityElement As SecurityElement
)

Parameters

securityElement
Type: System.Security.SecurityElement

The XML encoding from which to reconstruct the WebPermission.

Exception Condition
ArgumentNullException

The securityElement parameter is null.

ArgumentException

securityElement is not a permission element for this type.

The FromXml method reconstructs a WebPermission from an XML encoding that is defined by the SecurityElement class.

Use the ToXml method to XML-encode the WebPermission, including state information.

The following example creates a System.Security.SecurityElement, populates its attributes, and uses FromXml to transfer this information to an instance of WebPermission.

' Create  a WebPermission without permission on the protected resource.
Dim myWebPermission1 As New WebPermission(PermissionState.None)

' Create a SecurityElement by calling the ToXml method on the WebPermission 
' instance and display its attributes (which hold the XML encoding of 
' the WebPermission).
Console.WriteLine("Attributes and Values of the WebPermission are :")
myWebPermission1.ToXml().ToString()

' Create another WebPermission with no permission on the protected resource.
Dim myWebPermission2 As New WebPermission(PermissionState.None)

'Converts the new WebPermission from XML using myWebPermission1.
myWebPermission2.FromXml(myWebPermission1.ToXml())

.NET Framework
Available since 1.1
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