调试器中的C＃：comctl32.dll版本6

Question

我正在为TaskDialog使用WindowsAPICodePack。当我尝试显示对话框时，它说它需要加载comctl32.dll的版本6。所以我在app.manifest中添加了第6版，并尝试运行它。仍然没有运气。我去了调试文件夹，并运行没有Visual Studio的程序，它工作正常。我猜Visual Studio没有使用清单文件...我想知道是否有办法让它做到这一点。

Answer 1

Rob pol86，您的代码正在抛出SEHExceptions，因为ActivateActCtx和DeactivateActCtx的签名不正确。您必须使用UIntPtr而不是uint作为lpCookie。

因此，EnableThemingInScope.cs正确的代码是：

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 UIntPtr 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 = UIntPtr.Zero; 
      if (enable && OSFeature.Feature.IsPresent(OSFeature.Themes)) 
      { 
       if (EnsureActivateContextCreated()) 
       { 
        if (!ActivateActCtx(hActCtx, out cookie)) 
        { 
         // Be sure cookie always zero if activation failed 
         cookie = UIntPtr.Zero; 
        } 
       } 
      } 
     } 

     ~EnableThemingInScope() 
     { 
      Dispose(); 
     } 

     void IDisposable.Dispose() 
     { 
      Dispose(); 
      GC.SuppressFinalize(this); 
     } 

     private void Dispose() 
     { 
      if (cookie != UIntPtr.Zero) 
      { 
       try 
       { 
        if (DeactivateActCtx(0, cookie)) 
        { 
         // deactivation succeeded... 
         cookie = UIntPtr.Zero; 
        } 
       } 
       catch (SEHException) 
       { 
        //Hopefully solved this exception 
       } 
      } 
     } 

     [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 UIntPtr lpCookie); 
     [DllImport("Kernel32.dll")] 
     private extern static bool DeactivateActCtx(uint dwFlags, UIntPtr 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; 
     } 
    } 
} 

Answer 2

本页面介绍如何添加自定义清单到您的项目，以告诉Windows加载新的comctl32.dll（版本6.0）：

• Setting the correct manifest version

您是否有表现comctl32.dll的正确依赖关系？你嵌入了创建的清单吗？

Answer 3

我在调试模式下遇到与Visual Studio相同的问题。到目前为止，我还没有找到解决方法，它在发布模式下工作正常。

Answer 4

我最近遇到这个问题时CodePack中的TaskDialogDemo调试代码。这是我如何修复它。使用这个的问题是，如果我打开两个或三个对话框，它会抛出一个SEHException，我还没有想出如何解决。所以买家要小心。

添加核心\互操作\ 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; 
     } 
    } 
} 

然后，在上线93 核心\互操作\ TaskDialogs \ NativeTaskDialog.cs（以上的HResult HRESULT = TaskDialogNativeMethods.TaskDialogIndirect ）使部分看起来像这样（最终你将有三条新线）：

// 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); 
}