FileIOPermission.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 fileIO1 As String
    Dim fileIOPerm1, fileIOPerm2 As FileIOPermission

    Dim fileIOGen1 As New FileIOGenerator()
    Dim fileIOGen2 As New FileIOGenerator()

    fileIOGen1.ResetIndex()
    While fileIOGen1.CreateFilePath(fileIOPerm1, fileIO1, FileIOPermissionAccess.Read)
        If fileIOPerm1 Is Nothing Then
            GoTo ContinueWhile1
        End If
        Console.WriteLine("********************************************************" & ControlChars.Lf)
        fileIOGen2.ResetIndex()
        Try
            fileIOPerm2 = New FileIOPermission(PermissionState.None)
            fileIOPerm2.FromXml(fileIOPerm1.ToXml())
            Console.WriteLine(("Result of ToFromXml = " & fileIOPerm2.ToString() & ControlChars.Lf))

        Catch e As Exception
            Console.WriteLine(("ToFromXml failed :" & fileIOPerm1.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;

        string fileIO1;
        FileIOPermission fileIOPerm1,fileIOPerm2;

        FileIOGenerator fileIOGen1 = new FileIOGenerator();
        FileIOGenerator fileIOGen2 = new FileIOGenerator();

        fileIOGen1.ResetIndex();
        while(fileIOGen1.CreateFilePath(out fileIOPerm1, out fileIO1, FileIOPermissionAccess.Read)) 
        {
            if(fileIOPerm1 == null) continue;
            Console.WriteLine("********************************************************\n");
            fileIOGen2.ResetIndex();
            try
            {            
                fileIOPerm2= new FileIOPermission(PermissionState.None);
                fileIOPerm2.FromXml(fileIOPerm1.ToXml());
                Console.WriteLine("Result of ToFromXml = " +fileIOPerm2.ToString() + "\n");
            
            }
            catch(Exception e) 
            {
                Console.WriteLine("ToFromXml failed :" + fileIOPerm1.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. 
private:
bool ToFromXmlDemo()
{

    bool returnValue = true;

    String* fileIO1;
    FileIOPermission* fileIOPerm1;
    FileIOPermission* fileIOPerm2;


    FileIOGenerator* fileIOGen1 = new FileIOGenerator();
    FileIOGenerator* fileIOGen2 = new FileIOGenerator();

    fileIOGen1->ResetIndex();
    while(fileIOGen1->CreateFilePath(&fileIOPerm1, &fileIO1, FileIOPermissionAccess::Read)) 
    {
        if(fileIOPerm1 == 0) continue;
        Console::WriteLine(S"********************************************************\n");
        fileIOGen2->ResetIndex();
        try
        {            
            fileIOPerm2= new FileIOPermission(PermissionState::None);
            fileIOPerm2->FromXml(fileIOPerm1->ToXml());
            Console::WriteLine(S"Result of ToFromXml = {0}\n", fileIOPerm2);

        }
        catch(Exception* e) 
        {
            Console::WriteLine(S"ToFromXml failed :{0}{1}", fileIOPerm1, e);
            continue;
        }
    }

    return returnValue;

}

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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

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