在C#中使用TaskDialog时的EntryPointNotFoundException

时间:2009-10-23 09:34:22

标签: c# windows-7 pinvoke taskdialog

我正在使用以下代码调用TaskDialog。

    [DllImport("ComCtl32", CharSet = CharSet.Unicode, PreserveSig = false)]
    internal static extern void TaskDialogIndirect(
        [In] ref TASKDIALOGCONFIG pTaskConfig,
        [Out] out int pnButton,
        [Out] out int pnRadioButton,
        [Out] out bool pfVerificationFlagChecked);

但是,我得到异常“无法在DLL'ComCtl32'中找到名为'TaskDialogIndirect'的入口点。”

我带了this code。我使用的是Windows 7 x64(RC)。

我做错了什么?

3 个答案:

答案 0 :(得分:8)

除此之外的任何内容都不是vista功能

更新: 这个探针与并排程序集有关:这些函数仅存在于comctl32.dll版本6中,但出于兼容性原因,除非另有说明,否则Vista将加载早期版本。大多数人(包括我)采取的方法是使用清单。这已被证明是棘手的,并且可能不是正确的解决方案,特别是如果您正在编写的是库:您不一定要强制整个应用程序使用通用控件6.

正确的解决方案是在调用其中一个仅限Vista的API时推送new activation上下文。激活上下文将使用正确版本的comctl32.dll,而单独保留应用程序的其余部分,并且不需要清单。

幸运的是,这很容易。已经存在的一些完整代码MS Knowledgebase。文章中的代码(KB 830033)就是这样做的。

替代托管API: Vista的TaskDialog& amp;的完整包装器。 TaskDialogIndirect可以在这里找到:

http://code.msdn.microsoft.com/WindowsAPICodePack

对于WPF,请使用以下内容:

下载后从http://code.msdn.microsoft.com/VistaBridge下载'VistaBridge示例库',打开项目然后构建它(如果要查看所有代码,请检查\ Library或\ Interop文件夹中的文件)。您现在可以从VistaBridge \ bin \ debug \中获取DLL,并在项目中添加对它的引用,并且必须为每个不同的VistaBridge模块添加using语句。例如:

使用Microsoft.SDK.Samples.VistaBridge.Interop或.Library或.Properties或.Services - 根据您的需要。

VistaBridge项目包括用于许多其他Vista功能的API(例如TaskDialog,Vista OpenFile和SaveFile对话框,当然还有Aero Glass Effects)来试用这些功能,运行VistaBridge项目。

答案 1 :(得分:3)

使用Task Dialog需要Windows Common Controls DLL(ComCtl32.dll)的第6版!出于兼容性原因,默认情况下应用程序不绑定到此版本。绑定到版本6的一种方法是将清单文件放在可执行文件旁边(名为YourAppName.exe.manifest),其中包含以下内容:

 <dependency>
    <dependentAssembly>
      <assemblyIdentity
          type="win32"
          name="Microsoft.Windows.Common-Controls"
          version="6.0.0.0"
          processorArchitecture="*"
          publicKeyToken="6595b64144ccf1df"
          language="*"
        />
    </dependentAssembly>
  </dependency>

如果您不想拥有额外的独立文件,则此清单也可以作为Win32资源嵌入您的可执行文件中(名称为RT_MANIFEST,ID设置为1)。如果您将清单文件关联到项目的属性中,Visual Studio可以为您完成此工作。

答案 2 :(得分:0)

基于almog.ori的答案(有一些孤立的链接),我对链接的代码进行了少量更改,大约几天后我感到困惑:

MS Knowledgebase为(Archiv)提供了帮助,并为我提供了完整的代码:

using System.Runtime.InteropServices;
using System;
using System.Security;
using System.Security.Permissions;
using System.Collections;
using System.IO;
using System.Text;

namespace MyOfficeNetAddin
{
    /// <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 IntPtr cookie; // changed cookie from uint to IntPtr
   private static ACTCTX enableThemingActivationContext;
   private static IntPtr hActCtx;
   private static bool contextCreationSucceeded = false;

   public EnableThemingInScope(bool enable)
   {
     if (enable)
     {
       if (EnsureActivateContextCreated())
       {
         if (!ActivateActCtx(hActCtx, out cookie))
         {
           // Be sure cookie always zero if activation failed
           cookie = IntPtr.Zero;
         }
       }
     }
  }

  // Finalizer removed, that could cause Exceptions
  // ~EnableThemingInScope()
  // {
  //    Dispose(false);
  // }

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

  private void Dispose(bool disposing)
  {
     if (cookie != IntPtr.Zero)
     {
        if (DeactivateActCtx(0, cookie))
        {
           // deactivation succeeded...
           cookie = IntPtr.Zero;
        }
     }
  }

  private 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);

  // changed from uint to IntPtr according to 
  // https://www.pinvoke.net/default.aspx/kernel32.ActiveActCtx
  [DllImport("Kernel32.dll", SetLastError = true)]
  [return: MarshalAs(UnmanagedType.Bool)]
  private static extern bool ActivateActCtx(IntPtr hActCtx, out IntPtr lpCookie);

  // changed from uint to IntPtr according to 
  // https://www.pinvoke.net/default.aspx/kernel32.DeactivateActCtx
  [DllImport("Kernel32.dll", SetLastError = true)]
  [return: MarshalAs(UnmanagedType.Bool)]
  private static extern bool DeactivateActCtx(int dwFlags, IntPtr 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;
  }
 }
}

然后我以这种方式使用它:

using (new EnableThemingInScope(true))
{
    // The call all this mucking about is here for.
    VistaUnsafeNativeMethods.TaskDialogIndirect(ref config, out result, out radioButtonResult, out verificationFlagChecked);
 }
WPF Task Dialog Wrapper on GitHub中提供的TaskDialogInterop.cs

有关SEHException的终结器中可能的EnableThemingInScope的更多信息,请参见此Question on SO