UIPermission.FromXml Method (SecurityElement)

 

Reconstructs a permission with a specified state from an XML encoding.

Namespace:   System.Security.Permissions
Assembly:  mscorlib (in mscorlib.dll)

public override void FromXml(
	SecurityElement esd
)

Parameters

esd
Type: System.Security.SecurityElement

The XML encoding used to reconstruct the permission.

Exception Condition
ArgumentNullException

The esd parameter is null.

ArgumentException

The esd parameter is not a valid permission element.

-or-

The esd parameter's version number is not valid.

The following code example shows the behavior of the FromXml method. This example is part of a larger example provided for the UIPermission class.

System_CAPS_noteNote

The code example is intended to show the behavior of the method, not to demonstrate its use. In general, the methods of permission classes are used by the security infrastructure; they are not typically used in applications.

// ToXml creates an XML encoding of the permission and its current state; FromXml reconstructs a
// permission with the specified state from the XML encoding.
private static void ToFromXmlDemo()
{


    UIPermission uiPerm1 = new UIPermission(UIPermissionWindow.SafeTopLevelWindows);
    UIPermission uiPerm2 = new UIPermission(PermissionState.None);
    uiPerm2.FromXml(uiPerm1.ToXml());
    bool result = uiPerm2.Equals(uiPerm1);
    if (result)
    {
        Console.WriteLine("Result of ToFromXml = " + uiPerm2.ToString());
    }
    else
    {
        Console.WriteLine(uiPerm2.ToString());
        Console.WriteLine(uiPerm1.ToString());
    }

}

.NET Framework
Available since 1.1
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