FileDialogPermission Class
Controls the ability to access files or folders through a file dialog. This class cannot be inherited.
For a list of all members of this type, see FileDialogPermission Members.
System.Object
System.Security.CodeAccessPermission
System.Security.Permissions.FileDialogPermission
[Visual Basic] <Serializable> NotInheritable Public Class FileDialogPermission Inherits CodeAccessPermission Implements IUnrestrictedPermission [C#] [Serializable] public sealed class FileDialogPermission : CodeAccessPermission, IUnrestrictedPermission [C++] [Serializable] public __gc __sealed class FileDialogPermission : public CodeAccessPermission, IUnrestrictedPermission [JScript] public Serializable class FileDialogPermission extends CodeAccessPermission implements IUnrestrictedPermission
Thread Safety
Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.
Remarks
This permission is typically used to provide limited access to user-specified files when FileIOPermission is not granted.
Example
[Visual Basic] ' This sample demonstrates the IsSubsetOf, Union, Intersect, Copy, ToXml and FromXml methods ' of the FileDialogPermission class. Imports System Imports System.Security Imports System.Security.Permissions Imports Microsoft.VisualBasic <Assembly: CLSCompliant(True)> Public Class FileDialogPermissionDemo ' IsSubsetOf determines whether the current permission is a subset of the ' specified permission. Private Function IsSubsetOfDemo() As Boolean Dim returnValue As Boolean = True Dim fileDialog1, fileDialog2 As FileDialogPermissionAccess Dim fileDialogIdPerm1, fileDialogIdPerm2 As FileDialogPermission Dim fileDialogGen1 As New FileDialogGenerator() Dim fileDialogGen2 As New FileDialogGenerator() fileDialogGen1.ResetIndex() While fileDialogGen1.CreateFileDialog(fileDialogIdPerm1, fileDialog1) If fileDialogIdPerm1 Is Nothing Then GoTo ContinueWhile1 End If fileDialogGen2.ResetIndex() Console.WriteLine("********************************************************" & ControlChars.Lf) While fileDialogGen2.CreateFileDialog(fileDialogIdPerm2, fileDialog2) If fileDialogIdPerm2 Is Nothing Then GoTo ContinueWhile2 End If Try If fileDialogIdPerm1.IsSubsetOf(fileDialogIdPerm2) Then Console.WriteLine((fileDialogIdPerm1.Access.ToString() & " is a subset of " & fileDialogIdPerm2.Access.ToString())) Else Console.WriteLine((fileDialogIdPerm1.Access.ToString() & " is not a subset of " & fileDialogIdPerm2.Access.ToString())) End If Catch e As Exception Console.WriteLine(("An exception was thrown for subset :" & fileDialog1 & ControlChars.Lf & fileDialog2 & ControlChars.Lf & e.ToString())) returnValue = False End Try ContinueWhile2: End While ContinueWhile1: End While Return returnValue End Function 'IsSubsetOfDemo ' Union creates a new permission that is the union of the current permission and the ' specified permission. Private Function UnionDemo() As Boolean Dim returnValue As Boolean = True Dim fileDialog1, fileDialog2 As FileDialogPermissionAccess Dim fileDialogIdPerm1, fileDialogIdPerm2 As FileDialogPermission Dim fileDialogIdPerm3 As IPermission Dim fileDialogGen1 As New FileDialogGenerator() Dim fileDialogGen2 As New FileDialogGenerator() fileDialogGen1.ResetIndex() While fileDialogGen1.CreateFileDialog(fileDialogIdPerm1, fileDialog1) If fileDialogIdPerm1 Is Nothing Then GoTo ContinueWhile1 End If Console.WriteLine("**********************************************************" & ControlChars.Lf) fileDialogGen2.ResetIndex() While fileDialogGen2.CreateFileDialog(fileDialogIdPerm2, fileDialog2) If fileDialogIdPerm2 Is Nothing Then GoTo ContinueWhile2 End If fileDialogIdPerm3 = CType(fileDialogIdPerm1.Union(fileDialogIdPerm2), FileDialogPermission) fileDialogIdPerm3 = fileDialogIdPerm1.Union(fileDialogIdPerm2) If fileDialogIdPerm3 Is Nothing Then Console.WriteLine(("The union of " & fileDialog1.ToString() & " and " & fileDialog2.ToString() & " is null.")) Else Console.WriteLine(("The union of " & fileDialogIdPerm1.Access.ToString() & " and " & fileDialogIdPerm2.Access.ToString() & " = " & CType(fileDialogIdPerm3, FileDialogPermission).Access.ToString())) End If ContinueWhile2: End While ContinueWhile1: End While Return returnValue End Function 'UnionDemo ' 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 fileDialog1, fileDialog2 As FileDialogPermissionAccess Dim fileDialogIdPerm1, fileDialogIdPerm2, fileDialogIdPerm3 As FileDialogPermission Dim fileDialogGen1 As New FileDialogGenerator() Dim fileDialogGen2 As New FileDialogGenerator() fileDialogGen1.ResetIndex() While fileDialogGen1.CreateFileDialog(fileDialogIdPerm1, fileDialog1) If fileDialogIdPerm1 Is Nothing Then GoTo ContinueWhile1 End If Console.WriteLine("**********************************************************" & ControlChars.Lf) fileDialogGen2.ResetIndex() While fileDialogGen2.CreateFileDialog(fileDialogIdPerm2, fileDialog2) If fileDialogIdPerm2 Is Nothing Then GoTo ContinueWhile2 End If 'Console.WriteLine("\tfileDialogIdPerm2 = " &fileDialogIdPerm2.ToString()); fileDialogIdPerm3 = CType(fileDialogIdPerm1.Intersect(fileDialogIdPerm2), FileDialogPermission) If Not (fileDialogIdPerm3 Is Nothing) Then Console.WriteLine(("The intersection of " & fileDialog1.ToString() & " and " & fileDialog2.ToString() & " = " & CType(fileDialogIdPerm3, FileDialogPermission).Access.ToString())) Else Console.WriteLine(("The intersection of " & fileDialog1.ToString() & " and " & fileDialog2.ToString() & " is null.")) End If ContinueWhile2: End While ContinueWhile1: End While Return returnValue End Function 'IntersectDemo ' Copy creates and returns an identical copy of the current permission. Private Function CopyDemo() As Boolean Dim returnValue As Boolean = True Dim fileDialog1 As FileDialogPermissionAccess Dim fileDialogIdPerm1, fileDialogIdPerm2 As FileDialogPermission Dim fileDialogGen1 As New FileDialogGenerator() Dim fileDialogGen2 As New FileDialogGenerator() fileDialogGen1.ResetIndex() While fileDialogGen1.CreateFileDialog(fileDialogIdPerm1, fileDialog1) If fileDialogIdPerm1 Is Nothing Then GoTo ContinueWhile1 End If fileDialogGen2.ResetIndex() Console.WriteLine("********************************************************" & ControlChars.Lf) Try fileDialogIdPerm2 = CType(fileDialogIdPerm1.Copy(), FileDialogPermission) Console.WriteLine(("Result of copy = " & fileDialogIdPerm2.ToString())) Catch e As Exception Console.WriteLine(("Copy failed :" & fileDialogIdPerm1.ToString() & e.ToString())) GoTo ContinueWhile1 End Try ContinueWhile1: End While Return returnValue End Function 'CopyDemo ' 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 fileDialog1 As FileDialogPermissionAccess Dim fileDialogIdPerm1, fileDialogIdPerm2 As FileDialogPermission Dim fileDialogGen1 As New FileDialogGenerator() Dim fileDialogGen2 As New FileDialogGenerator() fileDialogGen1.ResetIndex() While fileDialogGen1.CreateFileDialog(fileDialogIdPerm1, fileDialog1) If fileDialogIdPerm1 Is Nothing Then GoTo ContinueWhile1 End If Console.WriteLine("********************************************************" & ControlChars.Lf) fileDialogGen2.ResetIndex() Try fileDialogIdPerm2 = New FileDialogPermission(PermissionState.None) fileDialogIdPerm2.FromXml(fileDialogIdPerm1.ToXml()) Console.WriteLine(("Result of ToFromXml = " & fileDialogIdPerm2.ToString())) Catch e As Exception Console.WriteLine(("ToFromXml failed :" & fileDialogIdPerm1.ToString() & e.ToString())) GoTo ContinueWhile1 End Try ContinueWhile1: End While Return returnValue End Function 'ToFromXmlDemo ' Invoke all demos. Public Function RunDemo() As Boolean Dim returnCode As Boolean = True Dim tempReturnCode As Boolean ' Call IsSubsetOf demo. tempReturnCode = IsSubsetOfDemo() If tempReturnCode Then Console.Out.WriteLine("IsSubsetOf demo completed successfully.") Else Console.Out.WriteLine("IsSubsetOf demo failed.") End If returnCode = tempReturnCode AndAlso returnCode ' Call Union demo. tempReturnCode = UnionDemo() If tempReturnCode Then Console.Out.WriteLine("Union demo completed successfully.") Else Console.Out.WriteLine("Union demo failed.") End If returnCode = tempReturnCode AndAlso returnCode ' Call Intersect demo. tempReturnCode = IntersectDemo() If tempReturnCode Then Console.Out.WriteLine("Intersect demo completed successfully.") Else Console.Out.WriteLine("Intersect demo failed.") End If returnCode = tempReturnCode AndAlso returnCode ' Call Copy demo. tempReturnCode = CopyDemo() If tempReturnCode Then Console.Out.WriteLine("Copy demo completed successfully.") Else Console.Out.WriteLine("Copy demo failed.") End If returnCode = tempReturnCode AndAlso returnCode ' Call ToFromXml demo. tempReturnCode = ToFromXmlDemo() If tempReturnCode Then Console.Out.WriteLine("ToFromXml demo completed successfully.") Else Console.Out.WriteLine("ToFromXml demo failed.") End If returnCode = tempReturnCode AndAlso returnCode Return returnCode End Function 'RunDemo ' Test harness. Public Overloads Shared Sub Main(ByVal args() As [String]) Try Dim democase As New FileDialogPermissionDemo() Dim returnCode As Boolean = democase.RunDemo() If returnCode Then Console.Out.WriteLine("FileDialogPermission demo completed successfully.") Console.Out.WriteLine("Press the Enter key to exit.") Dim consoleInput As String = Console.ReadLine() System.Environment.ExitCode = 100 Else Console.Out.WriteLine("FileDialogPermission demo failed.") Console.Out.WriteLine("Press the Enter key to exit.") Dim consoleInput As String = Console.ReadLine() System.Environment.ExitCode = 101 End If Catch e As Exception Console.Out.WriteLine("FileDialogPermission failed.") Console.WriteLine(e.ToString()) Console.Out.WriteLine("Press the Enter key to exit.") Dim consoleInput As String = Console.ReadLine() System.Environment.ExitCode = 101 End Try End Sub 'Main End Class 'FileDialogPermissionDemo ' This class generates FileDialogPermission objects. Friend Class FileDialogGenerator Private myFileDialog As FileDialogPermissionAccess() = {FileDialogPermissionAccess.None, FileDialogPermissionAccess.Open, FileDialogPermissionAccess.OpenSave, FileDialogPermissionAccess.Save} Private fileDialogIndex As Integer = 0 Public Sub New() ResetIndex() End Sub 'New Public Sub ResetIndex() fileDialogIndex = 0 End Sub 'ResetIndex ' Create a FileDialogPermission. Public Function CreateFileDialog(ByRef fileDialogPerm As FileDialogPermission, ByRef fileDialog As FileDialogPermissionAccess) As Boolean If fileDialogIndex >= myFileDialog.Length Then fileDialogPerm = New FileDialogPermission(PermissionState.None) fileDialog = FileDialogPermissionAccess.None Return False End If fileDialog = myFileDialog(fileDialogIndex) fileDialogIndex = fileDialogIndex + 1 Try fileDialogPerm = New FileDialogPermission(fileDialog) Return True Catch e As Exception Console.WriteLine(("Cannot create FileDialogPermission: " & fileDialog & " " & e.ToString())) fileDialogPerm = New FileDialogPermission(PermissionState.None) fileDialog = FileDialogPermissionAccess.None Return True End Try End Function 'CreateFileDialog ' End of FileDialogGenerator. [C#] // This sample demonstrates the IsSubsetOf, Union, Intersect, Copy, ToXml and FromXml methods // of the FileDialogPermission class. using System; using System.Security; using System.Security.Permissions; [assembly:CLSCompliant(true)] public class FileDialogPermissionDemo { // IsSubsetOf determines whether the current permission is a subset of the // specified permission. private bool IsSubsetOfDemo() { bool returnValue = true; FileDialogPermissionAccess fileDialog1,fileDialog2; FileDialogPermission fileDialogIdPerm1,fileDialogIdPerm2; FileDialogGenerator fileDialogGen1 = new FileDialogGenerator(); FileDialogGenerator fileDialogGen2 = new FileDialogGenerator(); fileDialogGen1.ResetIndex(); while(fileDialogGen1.CreateFileDialog(out fileDialogIdPerm1, out fileDialog1)) { if(fileDialogIdPerm1 == null) continue; fileDialogGen2.ResetIndex(); Console.WriteLine("********************************************************\n"); while(fileDialogGen2.CreateFileDialog(out fileDialogIdPerm2, out fileDialog2)) { if(fileDialogIdPerm2 == null) continue; try { if (fileDialogIdPerm1.IsSubsetOf(fileDialogIdPerm2)) { Console.WriteLine(fileDialogIdPerm1.Access + " is a subset of " + fileDialogIdPerm2.Access); } else { Console.WriteLine(fileDialogIdPerm1.Access + " is not a subset of " + fileDialogIdPerm2.Access); } } catch(Exception e) { Console.WriteLine("An exception was thrown for subset :" + fileDialogIdPerm1 + "\n" + fileDialogIdPerm2 +"\n" + e); returnValue=false; } } } return returnValue; } // Union creates a new permission that is the union of the current permission and the // specified permission. private bool UnionDemo() { bool returnValue = true; FileDialogPermissionAccess fileDialog1,fileDialog2; FileDialogPermission fileDialogIdPerm1,fileDialogIdPerm2; IPermission fileDialogIdPerm3; FileDialogGenerator fileDialogGen1 = new FileDialogGenerator(); FileDialogGenerator fileDialogGen2 = new FileDialogGenerator(); fileDialogGen1.ResetIndex(); while(fileDialogGen1.CreateFileDialog(out fileDialogIdPerm1, out fileDialog1)) { if(fileDialogIdPerm1 == null) continue; Console.WriteLine("**********************************************************\n"); fileDialogGen2.ResetIndex(); while(fileDialogGen2.CreateFileDialog(out fileDialogIdPerm2, out fileDialog2)) { if(fileDialogIdPerm2 == null) continue; fileDialogIdPerm3 = (FileDialogPermission)fileDialogIdPerm1.Union(fileDialogIdPerm2); fileDialogIdPerm3 = fileDialogIdPerm1.Union(fileDialogIdPerm2); if(fileDialogIdPerm3 == null) { Console.WriteLine("The union of " + fileDialog1 + " and " + fileDialog2 + " is null." ); } else { Console.WriteLine("The union of " + fileDialogIdPerm1.Access + " and " + fileDialogIdPerm2.Access + " = " + ((FileDialogPermission)fileDialogIdPerm3).Access.ToString()); } } } return returnValue; } // 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; FileDialogPermissionAccess fileDialog1,fileDialog2; FileDialogPermission fileDialogIdPerm1,fileDialogIdPerm2,fileDialogIdPerm3; FileDialogGenerator fileDialogGen1 = new FileDialogGenerator(); FileDialogGenerator fileDialogGen2 = new FileDialogGenerator(); fileDialogGen1.ResetIndex(); while(fileDialogGen1.CreateFileDialog(out fileDialogIdPerm1, out fileDialog1)) { if(fileDialogIdPerm1 == null) continue; Console.WriteLine("**********************************************************\n"); fileDialogGen2.ResetIndex(); while(fileDialogGen2.CreateFileDialog(out fileDialogIdPerm2, out fileDialog2)) { if(fileDialogIdPerm2 == null) continue; //Console.WriteLine("\tfileDialogIdPerm2 = " +fileDialogIdPerm2.ToString()); fileDialogIdPerm3 = (FileDialogPermission)fileDialogIdPerm1.Intersect(fileDialogIdPerm2); if (fileDialogIdPerm3 != null) { Console.WriteLine("The intersection of " + fileDialog1 + " and " + fileDialog2 + " = " + ((FileDialogPermission)fileDialogIdPerm3).Access.ToString()); } else { Console.WriteLine("The intersection of " + fileDialog1 + " and " + fileDialog2 + " is null." ); } } } return returnValue; } // Copy creates and returns an identical copy of the current permission. private bool CopyDemo() { bool returnValue = true; FileDialogPermissionAccess fileDialog1; FileDialogPermission fileDialogIdPerm1,fileDialogIdPerm2; FileDialogGenerator fileDialogGen1 = new FileDialogGenerator(); FileDialogGenerator fileDialogGen2 = new FileDialogGenerator(); fileDialogGen1.ResetIndex(); while(fileDialogGen1.CreateFileDialog(out fileDialogIdPerm1, out fileDialog1)) { if(fileDialogIdPerm1 == null) continue; fileDialogGen2.ResetIndex(); Console.WriteLine("********************************************************\n"); try { fileDialogIdPerm2 = (FileDialogPermission)fileDialogIdPerm1.Copy(); Console.WriteLine("Result of copy = " + fileDialogIdPerm2.ToString()); } catch(Exception e) { Console.WriteLine("Copy failed :" + fileDialogIdPerm1.ToString() + e); continue; } } return returnValue; } // 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; FileDialogPermissionAccess fileDialog1; FileDialogPermission fileDialogIdPerm1,fileDialogIdPerm2; FileDialogGenerator fileDialogGen1 = new FileDialogGenerator(); FileDialogGenerator fileDialogGen2 = new FileDialogGenerator(); fileDialogGen1.ResetIndex(); while(fileDialogGen1.CreateFileDialog(out fileDialogIdPerm1, out fileDialog1)) { if(fileDialogIdPerm1 == null) continue; Console.WriteLine("********************************************************\n"); fileDialogGen2.ResetIndex(); try { fileDialogIdPerm2= new FileDialogPermission(PermissionState.None); fileDialogIdPerm2.FromXml(fileDialogIdPerm1.ToXml()); Console.WriteLine("Result of ToFromXml = " + fileDialogIdPerm2.ToString()); } catch(Exception e) { Console.WriteLine("ToFromXml failed :" + fileDialogIdPerm1.ToString() + e); continue; } } return returnValue; } // Invoke all demos. public bool RunDemo() { bool returnCode = true; bool tempReturnCode; // Call IsSubsetOf demo. if(tempReturnCode= IsSubsetOfDemo())Console.Out.WriteLine("IsSubsetOf demo completed successfully."); else Console.Out.WriteLine("IsSubsetOf demo failed."); returnCode=tempReturnCode && returnCode; // Call Union demo. if(tempReturnCode= UnionDemo())Console.Out.WriteLine("Union demo completed successfully."); else Console.Out.WriteLine("Union demo failed."); returnCode=tempReturnCode && returnCode; // Call Intersect demo. if(tempReturnCode= IntersectDemo())Console.Out.WriteLine("Intersect demo completed successfully."); else Console.Out.WriteLine("Intersect demo failed."); returnCode=tempReturnCode && returnCode; // Call Copy demo. if(tempReturnCode= CopyDemo())Console.Out.WriteLine("Copy demo completed successfully."); else Console.Out.WriteLine("Copy demo failed."); returnCode=tempReturnCode && returnCode; // Call ToFromXml demo. if(tempReturnCode= ToFromXmlDemo())Console.Out.WriteLine("ToFromXml demo completed successfully."); else Console.Out.WriteLine("ToFromXml demo failed."); returnCode=tempReturnCode && returnCode; return ( returnCode ); } // Test harness. public static void Main(String[] args) { try { FileDialogPermissionDemo democase = new FileDialogPermissionDemo(); bool returnCode = democase.RunDemo(); if (returnCode) { Console.Out.WriteLine("FileDialogPermission demo completed successfully."); Console.Out.WriteLine("Press the Enter key to exit."); string consoleInput = Console.ReadLine(); System.Environment.ExitCode = 100; } else { Console.Out.WriteLine("FileDialogPermission demo failed."); Console.Out.WriteLine("Press the Enter key to exit."); string consoleInput = Console.ReadLine(); System.Environment.ExitCode = 101; } } catch(Exception e) { Console.Out.WriteLine("FileDialogPermission failed."); Console.WriteLine(e.ToString()); Console.Out.WriteLine("Press the Enter key to exit."); string consoleInput = Console.ReadLine(); System.Environment.ExitCode = 101; } } } // This class generates FileDialogPermission objects. internal class FileDialogGenerator { private FileDialogPermissionAccess[] myFileDialog = { FileDialogPermissionAccess.None, FileDialogPermissionAccess.Open, FileDialogPermissionAccess.OpenSave, FileDialogPermissionAccess.Save}; private int fileDialogIndex = 0; public FileDialogGenerator() { ResetIndex(); } public void ResetIndex() { fileDialogIndex = 0; } // Create a FileDialogPermission. public bool CreateFileDialog(out FileDialogPermission fileDialogPerm, out FileDialogPermissionAccess fileDialog) { if(fileDialogIndex >= myFileDialog.Length) { fileDialogPerm = new FileDialogPermission(PermissionState.None); fileDialog=FileDialogPermissionAccess.None; return false; } fileDialog = myFileDialog[fileDialogIndex++]; try { fileDialogPerm = new FileDialogPermission(fileDialog); return true; } catch(Exception e) { Console.WriteLine("Cannot create FileDialogPermission: " + fileDialog +" "+e); fileDialogPerm = new FileDialogPermission(PermissionState.None); fileDialog=FileDialogPermissionAccess.None; return true; } } } // End of FileDialogGenerator. [C++] // This sample demonstrates the IsSubsetOf, Union, Intersect, Copy, ToXml and FromXml methods // of the FileDialogPermission class. #using <mscorlib.dll> using namespace System::Runtime::InteropServices; using namespace System; using namespace System::Security; using namespace System::Security::Permissions; [assembly:CLSCompliant(true)]; // This class generates FileDialogPermission objects. private __gc class FileDialogGenerator { private: FileDialogPermissionAccess myFileDialog[]; int fileDialogIndex; public: FileDialogGenerator() { ResetIndex(); FileDialogPermissionAccess tempFileDialog[] = { FileDialogPermissionAccess::None, FileDialogPermissionAccess::Open, FileDialogPermissionAccess::OpenSave, FileDialogPermissionAccess::Save}; myFileDialog = tempFileDialog; } void ResetIndex() { fileDialogIndex = 0; } // Create a FileDialogPermission. bool CreateFileDialog([Out]FileDialogPermission** fileDialogPerm, [Out]FileDialogPermissionAccess* fileDialog) { if(fileDialogIndex >= myFileDialog->Length) { *fileDialogPerm = new FileDialogPermission(PermissionState::None); *fileDialog=FileDialogPermissionAccess::None; return false; } *fileDialog = myFileDialog[fileDialogIndex++]; try { *fileDialogPerm = new FileDialogPermission(*fileDialog); return true; } catch(Exception* e) { Console::WriteLine(S"Cannot create FileDialogPermission: {0} {1}", __box(*fileDialog), e); *fileDialogPerm = new FileDialogPermission(PermissionState::None); *fileDialog=FileDialogPermissionAccess::None; return true; } } }; // End of FileDialogGenerator. public __gc class FileDialogPermissionDemo { // IsSubsetOf determines whether the current permission is a subset of the // specified permission. private: bool IsSubsetOfDemo() { bool returnValue = true; FileDialogPermissionAccess fileDialog1,fileDialog2; FileDialogPermission* fileDialogIdPerm1; FileDialogPermission* fileDialogIdPerm2; FileDialogGenerator* fileDialogGen1 = new FileDialogGenerator(); FileDialogGenerator* fileDialogGen2 = new FileDialogGenerator(); fileDialogGen1->ResetIndex(); while(fileDialogGen1->CreateFileDialog(&fileDialogIdPerm1, &fileDialog1)) { if(fileDialogIdPerm1 == 0) continue; fileDialogGen2->ResetIndex(); Console::WriteLine(S"********************************************************\n"); while(fileDialogGen2->CreateFileDialog(&fileDialogIdPerm2, &fileDialog2)) { if(fileDialogIdPerm2 == 0) continue; try { if (fileDialogIdPerm1->IsSubsetOf(fileDialogIdPerm2)) { Console::WriteLine(S"{0} is a subset of {1}", __box(fileDialogIdPerm1->Access), __box(fileDialogIdPerm2->Access)); } else { Console::WriteLine(S"{0} is not a subset of {1}", __box(fileDialogIdPerm1->Access), __box(fileDialogIdPerm2->Access)); } } catch(Exception* e) { Console::WriteLine(S"An exception was thrown for subset :{0}\n{1}\n{2}", fileDialogIdPerm1, fileDialogIdPerm2, e); returnValue=false; } } } return returnValue; } // Union creates a new permission that is the union of the current permission and the // specified permission. private: bool UnionDemo() { bool returnValue = true; FileDialogPermissionAccess fileDialog1,fileDialog2; FileDialogPermission* fileDialogIdPerm1; FileDialogPermission* fileDialogIdPerm2; IPermission* fileDialogIdPerm3; FileDialogGenerator* fileDialogGen1 = new FileDialogGenerator(); FileDialogGenerator* fileDialogGen2 = new FileDialogGenerator(); fileDialogGen1->ResetIndex(); while(fileDialogGen1->CreateFileDialog(&fileDialogIdPerm1, &fileDialog1)) { if(fileDialogIdPerm1 == 0) continue; Console::WriteLine(S"**********************************************************\n"); fileDialogGen2->ResetIndex(); while(fileDialogGen2->CreateFileDialog(&fileDialogIdPerm2, &fileDialog2)) { if(fileDialogIdPerm2 == 0) continue; fileDialogIdPerm3 = dynamic_cast<FileDialogPermission*>(fileDialogIdPerm1->Union(fileDialogIdPerm2)); fileDialogIdPerm3 = fileDialogIdPerm1->Union(fileDialogIdPerm2); if(fileDialogIdPerm3 == 0) { Console::WriteLine(S"The union of {0} and {1} is null.", __box(fileDialog1), __box(fileDialog2)); } else { Console::WriteLine(S"The union of {0} and {1} = {2}", __box(fileDialogIdPerm1->Access), __box(fileDialogIdPerm2->Access), __box((dynamic_cast<FileDialogPermission*>(fileDialogIdPerm3))->Access)); } } } return returnValue; } // 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; FileDialogPermissionAccess fileDialog1,fileDialog2; FileDialogPermission* fileDialogIdPerm1; FileDialogPermission* fileDialogIdPerm2; FileDialogPermission* fileDialogIdPerm3; FileDialogGenerator* fileDialogGen1 = new FileDialogGenerator(); FileDialogGenerator* fileDialogGen2 = new FileDialogGenerator(); fileDialogGen1->ResetIndex(); while(fileDialogGen1->CreateFileDialog(&fileDialogIdPerm1, &fileDialog1)) { if(fileDialogIdPerm1 == 0) continue; Console::WriteLine(S"**********************************************************\n"); fileDialogGen2->ResetIndex(); while(fileDialogGen2->CreateFileDialog(&fileDialogIdPerm2, &fileDialog2)) { if(fileDialogIdPerm2 == 0) continue; //Console.WriteLine("\tfileDialogIdPerm2 = " +fileDialogIdPerm2.ToString()); fileDialogIdPerm3 = dynamic_cast<FileDialogPermission*>(fileDialogIdPerm1->Intersect(fileDialogIdPerm2)); if (fileDialogIdPerm3 != 0) { Console::WriteLine(S"The intersection of {0} and {1} = {2}", __box(fileDialog1), __box(fileDialog2), __box((dynamic_cast<FileDialogPermission*>(fileDialogIdPerm3))->Access)); } else { Console::WriteLine(S"The intersection of {0} and {1} is null.", __box(fileDialog1), __box(fileDialog2)); } } } return returnValue; } // Copy creates and returns an identical copy of the current permission. private: bool CopyDemo() { bool returnValue = true; FileDialogPermissionAccess fileDialog1; FileDialogPermission* fileDialogIdPerm1; FileDialogPermission* fileDialogIdPerm2; FileDialogGenerator* fileDialogGen1 = new FileDialogGenerator(); FileDialogGenerator* fileDialogGen2 = new FileDialogGenerator(); fileDialogGen1->ResetIndex(); while(fileDialogGen1->CreateFileDialog(&fileDialogIdPerm1, &fileDialog1)) { if(fileDialogIdPerm1 == 0) continue; fileDialogGen2->ResetIndex(); Console::WriteLine(S"********************************************************\n"); try { fileDialogIdPerm2 = dynamic_cast<FileDialogPermission*>(fileDialogIdPerm1->Copy()); Console::WriteLine(S"Result of copy = {0}", fileDialogIdPerm2); } catch(Exception* e) { Console::WriteLine(S"Copy failed :{0}{1}", fileDialogIdPerm1, e); continue; } } return returnValue; } // 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; FileDialogPermissionAccess fileDialog1; FileDialogPermission* fileDialogIdPerm1; FileDialogPermission* fileDialogIdPerm2; FileDialogGenerator* fileDialogGen1 = new FileDialogGenerator(); FileDialogGenerator* fileDialogGen2 = new FileDialogGenerator(); fileDialogGen1->ResetIndex(); while(fileDialogGen1->CreateFileDialog(&fileDialogIdPerm1, &fileDialog1)) { if(fileDialogIdPerm1 == 0) continue; Console::WriteLine(S"********************************************************\n"); fileDialogGen2->ResetIndex(); try { fileDialogIdPerm2= new FileDialogPermission(PermissionState::None); fileDialogIdPerm2->FromXml(fileDialogIdPerm1->ToXml()); Console::WriteLine(S"Result of ToFromXml = {0}", fileDialogIdPerm2); } catch(Exception* e) { Console::WriteLine(S"ToFromXml failed :{0}{1}", fileDialogIdPerm1, e); continue; } } return returnValue; } // Invoke all demos. public: bool RunDemo() { bool returnCode = true; bool tempReturnCode; // Call IsSubsetOf demo. if(tempReturnCode= IsSubsetOfDemo())Console::WriteLine(S"IsSubsetOf demo completed successfully."); else Console::WriteLine(S"IsSubsetOf demo failed."); returnCode=tempReturnCode && returnCode; // Call Union demo. if(tempReturnCode= UnionDemo())Console::WriteLine(S"Union demo completed successfully."); else Console::WriteLine(S"Union demo failed."); returnCode=tempReturnCode && returnCode; // Call Intersect demo. if(tempReturnCode= IntersectDemo())Console::WriteLine(S"Intersect demo completed successfully."); else Console::WriteLine(S"Intersect demo failed."); returnCode=tempReturnCode && returnCode; // Call Copy demo. if(tempReturnCode= CopyDemo())Console::WriteLine(S"Copy demo completed successfully."); else Console::WriteLine(S"Copy demo failed."); returnCode=tempReturnCode && returnCode; // Call ToFromXml demo. if(tempReturnCode= ToFromXmlDemo())Console::WriteLine(S"ToFromXml demo completed successfully."); else Console::WriteLine(S"ToFromXml demo failed."); returnCode=tempReturnCode && returnCode; return ( returnCode ); } }; // Test harness. int main() { try { FileDialogPermissionDemo* democase = new FileDialogPermissionDemo(); bool returnCode = democase->RunDemo(); if (returnCode) { Console::WriteLine(S"FileDialogPermission demo completed successfully."); Console::WriteLine(S"Press the Enter key to exit."); Console::ReadLine(); System::Environment::ExitCode = 100; } else { Console::WriteLine(S"FileDialogPermission demo failed."); Console::WriteLine(S"Press the Enter key to exit."); Console::ReadLine(); System::Environment::ExitCode = 101; } } catch(Exception* e) { Console::WriteLine(S"FileDialogPermission failed."); Console::WriteLine(e); Console::WriteLine(S"Press the Enter key to exit."); Console::ReadLine(); System::Environment::ExitCode = 101; } }
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Requirements
Namespace: System.Security.Permissions
Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family
Assembly: Mscorlib (in Mscorlib.dll)
See Also
FileDialogPermission Members | System.Security.Permissions Namespace | Permissions | Requesting Permissions | FileDialogPermissionAttribute | FileDialogPermissionAccess