在非托管 C++ 项目中使用 C# COM ->0x7697C41F (KernelBase.dll) 处的第一次机会异常 [英] Using C# COM in unmanaged C++ project -> First-chance exception at 0x7697C41F (KernelBase.dll)

问题描述

我正在尝试从非托管 Visual C++ 解决方案中的 C# COM 项目调用方法，但我不断收到下一个错误

I'm trying to call methods from a C# COM project in an unmanaged Visual C++ solution, but I keep getting the next error

First-chance exception at 0x7697C41F (KernelBase.dll) in Program.exe: 0x04242420 (parameters: 0x31415927, 0x6F310000, 0x00BBDAE8).

在下一段代码

SalesForceNew::IMyObjectClassPtr p;
p.CreateInstance(__uuidof(SalesForceNew::TestObject)); // error
SalesForceNew::MyObject mo = p->getObject(1, "a");

然而，mo 的值符合预期(5，aa").

However the value of mo is as expected (5, "aa").

我用这行代码导入 tlb 文件:

I import the tlb-file with this line of code:

#import "C:UsersBobDesktopComTestSalesForceNewinx86DebugSalesForceNew.tlb" named_guids

C#项目如下:

界面:

using System.Runtime.InteropServices;

namespace SalesForceNew
{
    [ComVisible(true)]
    [Guid("22901ACD-CA30-4D3E-B84B-73B707026AE5")]
    public interface IMyObjectClass
    {
        MyObject getObject(int i, string s);
    }

    [ComVisible(true)]
    [StructLayout(LayoutKind.Sequential)]
    public struct MyObject
    {
        public int Getal;
        public string Text;
    }
}

实现接口的类:

using System.Runtime.InteropServices;

namespace SalesForceNew
{
    [ClassInterface(ClassInterfaceType.None)]
    [Guid("234A2A35-F270-458D-A67B-C834EB794B27")]
    [ComVisible(true)]
    public class TestObject : IMyObjectClass
    {
        public MyObject getObject(int i, string s)
        {
            return new MyObject() { Getal = i * 5, Text = s + s };
        }
    }


}

我在 C# COM 项目的属性中检查了选项 Register for COM interop 和 Make assembly COM-Visible.

I checked the options Register for COM interop and Make assembly COM-Visible in the properties of the C# COM project.

UPDATE:如果我们将C# COM 项目的frameworkversion 更改为2.0、3.0 或3.5，则不会出现错误.仅在frameworkversion为4.0或4.5时显示.

UPDATE: the error won't come up if we change the frameworkversion of the C# COM project to 2.0, 3.0 or 3.5. It only shows up when the frameworkversion is 4.0 or 4.5.

推荐答案

异常代码小于 0x80000000 的异常是非致命异常.它们往往被用来传递信息.鞋子适合这里，异常代码 0x04242420 已被逆向工程为 CLRDBG_NOTIFICATION_EXCEPTION_CODE，在谷歌查询中输入数字以查看命中.这个答案来自微软员工可能是最可靠的:

Exceptions whose exception code is less than 0x80000000 are non-fatal exceptions. They tend to be used to pass information. The shoe fits here, exception code 0x04242420 has been reverse-engineered to CLRDBG_NOTIFICATION_EXCEPTION_CODE, type the number in a google query to see the hits. This answer from a Microsoft employee is probably the most reliable one:

出于好奇，我进行了一些挖掘，发现这实际上是一个未记录的异常 (CLRDBG_NOTIFICATION_EXCEPTION_CODE)，它显然是 4.0 CLR 中托管调试器使用的 IPC 协议的补充.忽略它应该是完全安全的.

Out of curiosity I did a little digging and found that this is actually an undocumented exception (CLRDBG_NOTIFICATION_EXCEPTION_CODE) that is apparently an addition to the IPC protocol used by the managed debugger in the 4.0 CLR. It should be entirely safe to ignore.

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