ISecurityEncodable.FromXml(SecurityElement) Method
Definition
Important
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Reconstructs a security object with a specified state from an XML encoding.
public:
void FromXml(System::Security::SecurityElement ^ e);public void FromXml(System.Security.SecurityElement e);abstract member FromXml : System.Security.SecurityElement -> unitPublic Sub FromXml (e As SecurityElement)Parameters
The XML encoding to use to reconstruct the security object.
Examples
The following code example demonstrates implementing the FromXml method. This code example is part of a larger example provided for the ISecurityEncodable class.
// Populate the permission's fields from XML.
public override void FromXml(SecurityElement e)
{
m_specifiedAsUnrestricted = false;
m_flags = 0;
// If XML indicates an unrestricted permission, make this permission unrestricted.
String s = (String)e.Attributes["Unrestricted"];
if (s != null)
{
m_specifiedAsUnrestricted = Convert.ToBoolean(s);
if (m_specifiedAsUnrestricted)
m_flags = SoundPermissionState.PlayAnySound;
}
// If XML indicates a restricted permission, parse the flags.
if (!m_specifiedAsUnrestricted)
{
s = (String)e.Attributes["Flags"];
if (s != null)
{
m_flags = (SoundPermissionState)
Convert.ToInt32(Enum.Parse(typeof(SoundPermission), s, true));
}
}
}
' Populate the permission's fields from XML.
Public Overrides Sub FromXml(ByVal e As SecurityElement)
m_specifiedAsUnrestricted = False
m_flags = 0
' If XML indicates an unrestricted permission, make this permission unrestricted.
Dim s As String = CStr(e.Attributes("Unrestricted"))
If Not (s Is Nothing) Then
m_specifiedAsUnrestricted = Convert.ToBoolean(s)
If m_specifiedAsUnrestricted Then
m_flags = SoundPermissionState.PlayAnySound
End If
End If
' If XML indicates a restricted permission, parse the flags.
If Not m_specifiedAsUnrestricted Then
s = CStr(e.Attributes("Flags"))
If Not (s Is Nothing) Then
m_flags = CType(Convert.ToInt32([Enum].Parse(GetType(SoundPermission), s, True)), SoundPermissionState)
End If
End If
End Sub
Remarks
Custom code that extends security objects needs to implement the ToXml and FromXml methods to make the objects security-encodable.
