Я недавно столкнулся с этой проблемой при отладке кода с помощью TaskDialogDemo в CodePack. Вот как я это исправил. Проблема с использованием этого заключается в том, что если я открою два или три диалоговых окна, это вызовет исключение SEHException, которое я не выяснил, как исправить. Так что покупатель остерегается.
Добавить Core \ Interop \ TaskDialogs \ EnableThemingInScope.cs :
using System;
using System.IO;
using System.Runtime.InteropServices;
using System.Security;
using System.Security.Permissions;
using System.Windows.Forms;
namespace Microsoft.WindowsAPICodePack.Dialogs {
/// http://support.microsoft.com/kb/830033
/// <devdoc>
/// This class is intended to use with the C# 'using' statement in
/// to activate an activation context for turning on visual theming at
/// the beginning of a scope, and have it automatically deactivated
/// when the scope is exited.
/// </devdoc>
[SuppressUnmanagedCodeSecurity]
internal class EnableThemingInScope : IDisposable {
// Private data
private uint cookie;
private static ACTCTX enableThemingActivationContext;
[System.Diagnostics.CodeAnalysis.SuppressMessage( "Microsoft.Reliability", "CA2006:UseSafeHandleToEncapsulateNativeResources" )]
private static IntPtr hActCtx;
private static bool contextCreationSucceeded = false;
public EnableThemingInScope( bool enable ) {
cookie = 0;
if ( enable && OSFeature.Feature.IsPresent( OSFeature.Themes ) ) {
if ( EnsureActivateContextCreated() ) {
if ( !ActivateActCtx( hActCtx, out cookie ) ) {
// Be sure cookie always zero if activation failed
cookie = 0;
}
}
}
}
~EnableThemingInScope() {
Dispose();
}
void IDisposable.Dispose() {
Dispose();
GC.SuppressFinalize( this );
}
private void Dispose() {
if ( cookie != 0 ) {
try {
if ( DeactivateActCtx( 0, cookie ) ) {
// deactivation succeeded...
cookie = 0;
}
} catch ( SEHException ) {
// Robpol86: I don't know how to fix this!
}
}
}
[System.Diagnostics.CodeAnalysis.SuppressMessage( "Microsoft.Reliability", "CA2002:DoNotLockOnObjectsWithWeakIdentity" )]
private static bool EnsureActivateContextCreated() {
lock ( typeof( EnableThemingInScope ) ) {
if ( !contextCreationSucceeded ) {
// Pull manifest from the .NET Framework install
// directory
string assemblyLoc = null;
FileIOPermission fiop = new FileIOPermission( PermissionState.None );
fiop.AllFiles = FileIOPermissionAccess.PathDiscovery;
fiop.Assert();
try {
assemblyLoc = typeof( Object ).Assembly.Location;
} finally {
CodeAccessPermission.RevertAssert();
}
string manifestLoc = null;
string installDir = null;
if ( assemblyLoc != null ) {
installDir = Path.GetDirectoryName( assemblyLoc );
const string manifestName = "XPThemes.manifest";
manifestLoc = Path.Combine( installDir, manifestName );
}
if ( manifestLoc != null && installDir != null ) {
enableThemingActivationContext = new ACTCTX();
enableThemingActivationContext.cbSize = Marshal.SizeOf( typeof( ACTCTX ) );
enableThemingActivationContext.lpSource = manifestLoc;
// Set the lpAssemblyDirectory to the install
// directory to prevent Win32 Side by Side from
// looking for comctl32 in the application
// directory, which could cause a bogus dll to be
// placed there and open a security hole.
enableThemingActivationContext.lpAssemblyDirectory = installDir;
enableThemingActivationContext.dwFlags = ACTCTX_FLAG_ASSEMBLY_DIRECTORY_VALID;
// Note this will fail gracefully if file specified
// by manifestLoc doesn't exist.
hActCtx = CreateActCtx( ref enableThemingActivationContext );
contextCreationSucceeded = (hActCtx != new IntPtr( -1 ));
}
}
// If we return false, we'll try again on the next call into
// EnsureActivateContextCreated(), which is fine.
return contextCreationSucceeded;
}
}
// All the pinvoke goo...
[DllImport( "Kernel32.dll" )]
private extern static IntPtr CreateActCtx( ref ACTCTX actctx );
[DllImport( "Kernel32.dll" )]
private extern static bool ActivateActCtx( IntPtr hActCtx, out uint lpCookie );
[DllImport( "Kernel32.dll" )]
private extern static bool DeactivateActCtx( uint dwFlags, uint lpCookie );
private const int ACTCTX_FLAG_ASSEMBLY_DIRECTORY_VALID = 0x004;
private struct ACTCTX {
public int cbSize;
public uint dwFlags;
public string lpSource;
public ushort wProcessorArchitecture;
public ushort wLangId;
public string lpAssemblyDirectory;
public string lpResourceName;
public string lpApplicationName;
}
}
}
Затем в Core \ Interop \ TaskDialogs \ NativeTaskDialog.cs в строке 93 (выше HResult hresult = TaskDialogNativeMethods.TaskDialogIndirect ) этот раздел будет выглядеть так (в конце концов вы будете есть три новые строки):
// Here is the way we use "vanilla" P/Invoke to call TaskDialogIndirect().
HResult hresult;
using ( new EnableThemingInScope( true ) ) {
hresult = TaskDialogNativeMethods.TaskDialogIndirect(
nativeDialogConfig,
out selectedButtonId,
out selectedRadioButtonId,
out checkBoxChecked );
}