Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / clr / src / BCL / System / Security / Permissions / FileDialogPermission.cs / 1 / FileDialogPermission.cs
// ==++== // // Copyright (c) Microsoft Corporation. All rights reserved. // // ==--== // FileDialogPermission.cs // namespace System.Security.Permissions { using System; using System.Text; using System.Security; using System.Security.Util; using System.IO; using System.Runtime.Serialization; using System.Reflection; using System.Collections; using System.Globalization; [Serializable, Flags] [System.Runtime.InteropServices.ComVisible(true)] public enum FileDialogPermissionAccess { None = 0x00, Open = 0x01, Save = 0x02, OpenSave = Open | Save } [Serializable] [System.Runtime.InteropServices.ComVisible(true)] public sealed class FileDialogPermission : CodeAccessPermission, IUnrestrictedPermission, IBuiltInPermission { FileDialogPermissionAccess access; public FileDialogPermission(PermissionState state) { if (state == PermissionState.Unrestricted) { SetUnrestricted(true); } else if (state == PermissionState.None) { SetUnrestricted(false); Reset(); } else { throw new ArgumentException(Environment.GetResourceString("Argument_InvalidPermissionState")); } } public FileDialogPermission(FileDialogPermissionAccess access) { VerifyAccess(access); this.access = access; } public FileDialogPermissionAccess Access { get { return access; } set { VerifyAccess(value); access = value; } } public override IPermission Copy() { return new FileDialogPermission(this.access); } public override void FromXml(SecurityElement esd) { CodeAccessPermission.ValidateElement(esd, this); if (XMLUtil.IsUnrestricted(esd)) { SetUnrestricted(true); return; } access = FileDialogPermissionAccess.None; string accessXml = esd.Attribute("Access"); if (accessXml != null) access = (FileDialogPermissionAccess)Enum.Parse(typeof(FileDialogPermissionAccess), accessXml); } ///int IBuiltInPermission.GetTokenIndex() { return FileDialogPermission.GetTokenIndex(); } internal static int GetTokenIndex() { return BuiltInPermissionIndex.FileDialogPermissionIndex; } public override IPermission Intersect(IPermission target) { if (target == null) { return null; } else if (!VerifyType(target)) { throw new ArgumentException(String.Format(CultureInfo.CurrentCulture, Environment.GetResourceString("Argument_WrongType"), this.GetType().FullName)); } FileDialogPermission operand = (FileDialogPermission)target; FileDialogPermissionAccess intersectAccess = access & operand.Access; if (intersectAccess == FileDialogPermissionAccess.None) return null; else return new FileDialogPermission(intersectAccess); } public override bool IsSubsetOf(IPermission target) { if (target == null) { // Only safe subset if this is empty return access == FileDialogPermissionAccess.None; } try { FileDialogPermission operand = (FileDialogPermission)target; if (operand.IsUnrestricted()) { return true; } else if (this.IsUnrestricted()) { return false; } else { int open = (int)(access & FileDialogPermissionAccess.Open); int save = (int)(access & FileDialogPermissionAccess.Save); int openTarget = (int)(operand.Access & FileDialogPermissionAccess.Open); int saveTarget = (int)(operand.Access & FileDialogPermissionAccess.Save); return open <= openTarget && save <= saveTarget; } } catch (InvalidCastException) { throw new ArgumentException(String.Format(CultureInfo.CurrentCulture, Environment.GetResourceString("Argument_WrongType"), this.GetType().FullName)); } } public bool IsUnrestricted() { return access == FileDialogPermissionAccess.OpenSave; } void Reset() { access = FileDialogPermissionAccess.None; } void SetUnrestricted( bool unrestricted ) { if (unrestricted) { access = FileDialogPermissionAccess.OpenSave; } } public override SecurityElement ToXml() { SecurityElement esd = CodeAccessPermission.CreatePermissionElement( this, "System.Security.Permissions.FileDialogPermission" ); if (!IsUnrestricted()) { if (access != FileDialogPermissionAccess.None) { esd.AddAttribute("Access", Enum.GetName(typeof(FileDialogPermissionAccess), access)); } } else { esd.AddAttribute("Unrestricted", "true"); } return esd; } public override IPermission Union(IPermission target) { if (target == null) { return this.Copy(); } else if (!VerifyType(target)) { throw new ArgumentException(String.Format(CultureInfo.CurrentCulture, Environment.GetResourceString("Argument_WrongType"), this.GetType().FullName)); } FileDialogPermission operand = (FileDialogPermission)target; return new FileDialogPermission(access | operand.Access); } static void VerifyAccess(FileDialogPermissionAccess access) { if ((access & ~FileDialogPermissionAccess.OpenSave) != 0 ) { throw new ArgumentException(String.Format(CultureInfo.CurrentCulture, Environment.GetResourceString("Arg_EnumIllegalVal"), (int)access)); } } } }
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- SmiConnection.cs
- ProfileManager.cs
- TreeNodeStyleCollection.cs
- GrammarBuilderWildcard.cs
- CodeStatementCollection.cs
- CultureInfo.cs
- SerializationInfoEnumerator.cs
- HwndTarget.cs
- AspCompat.cs
- UrlUtility.cs
- PageAsyncTaskManager.cs
- Decimal.cs
- JulianCalendar.cs
- MouseEventArgs.cs
- figurelength.cs
- CasesDictionary.cs
- PresentationTraceSources.cs
- AssemblyName.cs
- ClientFormsIdentity.cs
- ControlBuilderAttribute.cs
- PermissionToken.cs
- OracleRowUpdatedEventArgs.cs
- StylusLogic.cs
- _UriTypeConverter.cs
- MeasureData.cs
- CategoryAttribute.cs
- ResourcesBuildProvider.cs
- RoleManagerSection.cs
- altserialization.cs
- Interfaces.cs
- PreviewPrintController.cs
- ObjectAssociationEndMapping.cs
- IntPtr.cs
- ClientScriptManager.cs
- DotExpr.cs
- Clipboard.cs
- CompilerError.cs
- OperandQuery.cs
- AddValidationError.cs
- SafeNativeMethods.cs
- SkewTransform.cs
- KeyGestureConverter.cs
- ObservableCollection.cs
- TextTreeNode.cs
- SQLBinaryStorage.cs
- OdbcParameterCollection.cs
- GridItem.cs
- XmlSerializableWriter.cs
- HMACSHA512.cs
- AbstractDataSvcMapFileLoader.cs
- PreviousTrackingServiceAttribute.cs
- PbrsForward.cs
- ExpressionSelection.cs
- XmlSchemaProviderAttribute.cs
- LabelEditEvent.cs
- TextRangeBase.cs
- LabelAutomationPeer.cs
- WizardStepBase.cs
- TypeHelpers.cs
- Application.cs
- UserPreferenceChangedEventArgs.cs
- ExtentKey.cs
- VisualCollection.cs
- TraceFilter.cs
- DataGridViewCellStateChangedEventArgs.cs
- RotateTransform.cs
- GridViewEditEventArgs.cs
- SqlDataSourceFilteringEventArgs.cs
- DataGridColumnCollection.cs
- DbSourceParameterCollection.cs
- CollectionExtensions.cs
- CompoundFileReference.cs
- RulePatternOps.cs
- PropertyStore.cs
- RawStylusInputCustomData.cs
- ControlHelper.cs
- RijndaelManagedTransform.cs
- AttributeXamlType.cs
- StorageScalarPropertyMapping.cs
- FixedMaxHeap.cs
- ObjectItemAssemblyLoader.cs
- Evidence.cs
- DictionarySurrogate.cs
- CustomActivityDesigner.cs
- ProcessHostServerConfig.cs
- MatrixValueSerializer.cs
- PointAnimationClockResource.cs
- DataTableCollection.cs
- TransactionFlowBindingElement.cs
- ConfigurationValue.cs
- TextPointer.cs
- ConnectionManagementSection.cs
- EntityTypeEmitter.cs
- BitConverter.cs
- ProviderCollection.cs
- DataBoundControlActionList.cs
- TreeView.cs
- XmlSerializerAssemblyAttribute.cs
- VectorConverter.cs
- MeasureItemEvent.cs