我正在使用WindowsAPI代码包 http://code.msdn.microsoft.com/WindowsAPICodePack对于任务对话框。当我尝试显示该对话框时,它说需要加载 comctl32.dll 的版本 6。所以我将版本 6 添加到 app.manifest 并尝试运行它。还是没有运气。我进入 Debug 文件夹并在没有 Visual Studio 的情况下运行该程序,它工作正常。我猜测 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。
Robpol86,您的代码抛出 SEHExceptions,因为 ActivateActCtx 和 DeactivateActCtx 的签名不正确。你必须使用UIntPtr
代替uint
对于 lpCookie。
因此,EnableThemingInScope.cs 的正确代码是:
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;
}
}
}
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