StrongNameIdentityPermission.FromXml(SecurityElement) Method

Definition

Namespace:

System.Security.Permissions

Assembly:

System.Security.Permissions.dll

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

public:
 override void FromXml(System::Security::SecurityElement ^ e);

public override void FromXml (System.Security.SecurityElement e);

override this.FromXml : System.Security.SecurityElement -> unit

Public Overrides Sub FromXml (e As SecurityElement)

Parameters

e

SecurityElement

The XML encoding to use to reconstruct the permission.

Exceptions

ArgumentNullException

The e parameter is null.

ArgumentException

The e parameter is not a valid permission element.

-or-

The e parameter's version number is not valid.

Examples

The following code example shows the behavior of the FromXml method. This example is part of a larger example provided for the StrongNameIdentityPermission class. The best use for this example is to build and execute the entire example, and view its output.

Note

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.
    bool ToFromXmlDemo()
    {
        bool returnValue = true;
        StrongNameIdentityPermission^ snIdPerm1;
        StrongNameIdentityPermission^ snIdPerm2;
        snIdPerm1 = gcnew StrongNameIdentityPermission(blob, "MyCompany.MyDepartment.*", gcnew Version("1.0.0.0"));    
        snIdPerm2 = gcnew StrongNameIdentityPermission(PermissionState::None);
        snIdPerm2->FromXml(snIdPerm1->ToXml());
        Console::WriteLine("Result of ToFromXml = " + snIdPerm2->ToString() + "\n");

        return returnValue;
    }


public:

// 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 bool ToFromXmlDemo()
{

    bool returnValue = true;

    StrongNameIdentityPermission snIdPerm1, snIdPerm2;

    snIdPerm1 = new StrongNameIdentityPermission(blob, "MyCompany.MyDepartment.*", new Version("1.0.0.0"));    
    snIdPerm2 = new StrongNameIdentityPermission(PermissionState.None);
    snIdPerm2.FromXml(snIdPerm1.ToXml());
    Console.WriteLine("Result of ToFromXml = " + snIdPerm2.ToString() + "\n");

    return returnValue;
}

' 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 Function ToFromXmlDemo() As Boolean 
    
    Dim returnValue As Boolean = True
    
    Dim snIdPerm1, snIdPerm2 As StrongNameIdentityPermission
    
    snIdPerm1 = New StrongNameIdentityPermission(blob, "MyCompany.MyDepartment.*", New Version("1.0.0.0"))
    snIdPerm2 = New StrongNameIdentityPermission(PermissionState.None)
    snIdPerm2.FromXml(snIdPerm1.ToXml())
    Console.WriteLine("Result of ToFromXml = " + snIdPerm2.ToString() + vbLf)
    
    Return returnValue

End Function 'ToFromXmlDemo

Remarks

This method is not used by application code.