RegistryPermission.Intersect メソッド
現在のアクセス許可と指定したアクセス許可の積集合を表すアクセス許可を作成して返します。
Overrides Public Function Intersect( _
ByVal target As IPermission _) As IPermission Implements IPermission.Intersect
[C#]
public override IPermission Intersect(IPermissiontarget);
[C++]
public: IPermission* Intersect(IPermission* target);
[JScript]
public override function Intersect(
target : IPermission) : IPermission;
パラメータ
- target
現在のアクセス許可との積集合を持つアクセス許可。これは、現在のアクセス許可と同じ型であることが必要です。
戻り値
現在のアクセス許可と指定したアクセス許可の積集合を表す新しいアクセス許可。積集合が空の場合、この新しいアクセス許可は null 参照 (Visual Basic では Nothing) です。
実装
例外
| 例外の種類 | 条件 |
|---|---|
| ArgumentException | target パラメータが null 参照 (Visual Basic では Nothing) ではなく、現在のアクセス許可と同じ型でもありません。 |
解説
2 つのアクセス許可の積集合となるアクセス許可には、両方に共通する操作の集合が記述されています。2 つのアクセス許可を要求し、その両方について要求が満たされる場合にだけ、それらの積集合を表すアクセス許可に対する要求も満たされます。
使用例
' Intersect creates and returns a new permission that is the intersection of the
' current permission and the permission specified.
Private Function IntersectDemo() As Boolean
Dim returnValue As Boolean = True
Dim reg1, reg2 As String
Dim regPerm1, regPerm2, regIdPerm3 As RegistryPermission
Dim regGen1 As New regGenerator()
Dim regGen2 As New regGenerator()
regGen1.ResetIndex()
While regGen1.CreateReg(regPerm1, reg1, RegistryPermissionAccess.Read)
If reg1 Is Nothing Then
GoTo ContinueWhile1
End If
Console.WriteLine("**********************************************************" & ControlChars.Lf)
regGen2.ResetIndex()
While regGen2.CreateReg(regPerm2, reg2, RegistryPermissionAccess.Read)
If regPerm2 Is Nothing Then
GoTo ContinueWhile2
End If
Dim firstPermission As String = IIf(reg1 = "" Or reg1 Is Nothing, "null", reg1)
Dim secondPermission As String = IIf(reg2 = "" Or reg2 Is Nothing, "null", reg2)
Try
regIdPerm3 = CType(regPerm1.Intersect(regPerm2), RegistryPermission)
If Not (regIdPerm3 Is Nothing) AndAlso Not (regIdPerm3.GetPathList(RegistryPermissionAccess.Read) Is Nothing) Then
Console.WriteLine(("The intersection of " & firstPermission & " and " & ControlChars.Lf & ControlChars.Tab & secondPermission & " = " & ControlChars.Lf & ControlChars.Tab & CType(regIdPerm3, RegistryPermission).GetPathList(RegistryPermissionAccess.Read).ToString()))
Else
Console.WriteLine(("The intersection of " & firstPermission & " and " & ControlChars.Lf & ControlChars.Tab & secondPermission & " is null. "))
End If
Catch e As Exception
Console.WriteLine(("An exception was thrown for intersection : " & e.ToString()))
returnValue = False
End Try
ContinueWhile2:
End While
ContinueWhile1:
End While
Return returnValue
End Function 'IntersectDemo
[C#]
// Intersect creates and returns a new permission that is the intersection of the
// current permission and the permission specified.
private bool IntersectDemo()
{
bool returnValue = true;
string reg1,reg2;
RegistryPermission regPerm1,regPerm2,regIdPerm3;
RegGenerator regGen1 = new RegGenerator();
RegGenerator regGen2 = new RegGenerator();
regGen1.ResetIndex();
while(regGen1.CreateReg(out regPerm1, out reg1, RegistryPermissionAccess.Read))
{
if(reg1 == null) continue;
Console.WriteLine("**********************************************************\n");
regGen2.ResetIndex();
while(regGen2.CreateReg(out regPerm2, out reg2, RegistryPermissionAccess.Read))
{
if(regPerm2 == null) continue;
string firstPermission = reg1 == "" | reg1 == null ? "null" : reg1 ;
string secondPermission = reg2 == "" | reg2 == null ? "null" : reg2;
try
{
regIdPerm3 = (RegistryPermission)regPerm1.Intersect(regPerm2);
if (regIdPerm3 != null && regIdPerm3.GetPathList(RegistryPermissionAccess.Read) != null)
{
Console.WriteLine("The intersection of " + firstPermission
+ " and \n\t" + secondPermission + " = \n\t"
+ ((RegistryPermission)regIdPerm3).GetPathList(RegistryPermissionAccess.Read).ToString());
}
else
{
Console.WriteLine("The intersection of " + firstPermission
+ " and \n\t" + secondPermission + " is null. ");
}
}
catch(Exception e)
{
Console.WriteLine("An exception was thrown for intersection : " + e);
returnValue=false;
}
}
}
return returnValue;
}
[C++]
// Intersect creates and returns a new permission that is the intersection of the
// current permission and the permission specified.
bool IntersectDemo()
{
bool returnValue = true;
String* reg1;
String* reg2;
RegistryPermission* regPerm1;
RegistryPermission* regPerm2;
RegistryPermission* regIdPerm3;
RegGenerator* regGen1 = new RegGenerator();
RegGenerator* regGen2 = new RegGenerator();
regGen1->ResetIndex();
while(regGen1->CreateReg(®Perm1, ®1, RegistryPermissionAccess::Read))
{
if(reg1 == 0) continue;
Console::WriteLine(S"**********************************************************\n");
regGen2->ResetIndex();
while(regGen2->CreateReg(®Perm2, ®2, RegistryPermissionAccess::Read))
{
if(regPerm2 == 0) continue;
String* firstPermission = reg1->Equals(S"") || reg1 == 0 ? S"null" : reg1 ;
String* secondPermission = reg2->Equals(S"") || reg2 == 0 ? S"null" : reg2;
try
{
regIdPerm3 = dynamic_cast<RegistryPermission*>(regPerm1->Intersect(regPerm2));
if (regIdPerm3 != 0 && regIdPerm3->GetPathList(RegistryPermissionAccess::Read) != 0)
{
Console::WriteLine(S"The intersection of {0} and \n\t{1} = \n\t{2}", firstPermission, secondPermission, (dynamic_cast<RegistryPermission*>(regIdPerm3))->GetPathList(RegistryPermissionAccess::Read));
}
else
{
Console::WriteLine(S"The intersection of {0} and \n\t{1} is null. ", firstPermission, secondPermission);
}
}
catch(Exception* e)
{
Console::WriteLine(S"An exception was thrown for intersection : {0}", e);
returnValue=false;
}
}
}
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
参照
RegistryPermission クラス | RegistryPermission メンバ | System.Security.Permissions 名前空間