SecurityPermission.FromXml メソッド

XML エンコーディングから、指定した状態のアクセス許可を再構築します。

Overrides Public Sub FromXml( _
   ByVal esd As SecurityElement _) Implements ISecurityEncodable.FromXml
[C#]
public override void FromXml(SecurityElementesd);
[C++]
public: void FromXml(SecurityElement* esd);
[JScript]
public override function FromXml(
   esd : SecurityElement);

パラメータ

• esd
  アクセス許可の再構築に使用する XML エンコーディング。

実装

ISecurityEncodable.FromXml

例外

使用例

 
' 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 Security1 As SecurityPermissionFlag
    Dim SecurityPerm1, SecurityPerm2 As SecurityPermission
    Dim SecurityGen1 As New SecurityGenerator()
    Dim SecurityGen2 As New SecurityGenerator()
    SecurityGen1.ResetIndex()
    While SecurityGen1.CreateSecurity(SecurityPerm1, Security1)
        If SecurityPerm1 Is Nothing Then
            GoTo ContinueWhile1
        End If
        Console.WriteLine("********************************************************" & ControlChars.Lf)
        SecurityGen2.ResetIndex()
        Try
            SecurityPerm2 = New SecurityPermission(PermissionState.None)
            SecurityPerm2.FromXml(SecurityPerm1.ToXml())
            Console.WriteLine(("Result of ToFromXml = " & SecurityPerm2.ToString()))

        Catch e As Exception
            Console.WriteLine(("ToFromXml failed :" & SecurityPerm1.ToString() & e.ToString()))
            GoTo ContinueWhile1
        End Try
ContinueWhile1:
    End While

    Return returnValue
End Function 'ToFromXmlDemo


[C#] 
// 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;

    SecurityPermissionFlag Security1;
    SecurityPermission SecurityPerm1,SecurityPerm2;
    SecurityGenerator SecurityGen1 = new SecurityGenerator();
    SecurityGenerator SecurityGen2 = new SecurityGenerator();
    SecurityGen1.ResetIndex();
    while(SecurityGen1.CreateSecurity(out SecurityPerm1, out Security1)) 
    {
        if(SecurityPerm1 == null) continue;
        Console.WriteLine("********************************************************\n");
        SecurityGen2.ResetIndex();
        try
        {            
            SecurityPerm2= new SecurityPermission(PermissionState.None);
            SecurityPerm2.FromXml(SecurityPerm1.ToXml());
            Console.WriteLine("Result of ToFromXml = " +
                SecurityPerm2.ToString());

        }
        catch(Exception e) 
        {
            Console.WriteLine("ToFromXml failed :" + SecurityPerm1.ToString() + e);
            continue;
        }
    }

    return returnValue;

}

[C++] 
// 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;

    SecurityPermissionFlag Security1;
    SecurityPermission* SecurityPerm1;
    SecurityPermission* SecurityPerm2;
    SecurityGenerator* SecurityGen1 = new SecurityGenerator();
    SecurityGenerator* SecurityGen2 = new SecurityGenerator();
    SecurityGen1->ResetIndex();
    while(SecurityGen1->CreateSecurity(&SecurityPerm1, &Security1)) 
    {
        if(SecurityPerm1 == 0) continue;
        Console::WriteLine(S"********************************************************\n");
        SecurityGen2->ResetIndex();
        try
        {            
            SecurityPerm2= new SecurityPermission(PermissionState::None);
            SecurityPerm2->FromXml(SecurityPerm1->ToXml());
            Console::WriteLine(S"Result of ToFromXml = {0}", SecurityPerm2);

        }
        catch(Exception* e) 
        {
            Console::WriteLine(S"ToFromXml failed :{0}{1}", SecurityPerm1, e);
            continue;
        }
    }

    return returnValue;

}

[JScript] JScript のサンプルはありません。Visual Basic、C#、および C++ のサンプルを表示するには、このページの左上隅にある言語のフィルタ ボタン をクリックします。

必要条件

プラットフォーム: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 ファミリ, Common Language Infrastructure (CLI) Standard

参照

SecurityPermission クラス | SecurityPermission メンバ | System.Security.Permissions 名前空間