c# - C#COM对象和 “The value of ESP was not properly saved across a function call…”

我在C#上添加了一个COM对象，并且正在c++ dll中使用它。

在c++中，COM对象与#import derective一起导入

问题是，当从C++ dll调用COM对象的任何函数时，我收到运行时检查错误:



在由c++ import指令生成的com对象包装中，所有函数都声明为__stdcall

最佳答案

好的，看来我已经找到了解决方案:
我已经为C#COM接口(interface)中的所有方法确定了In / Out / MarshalAs属性:

[Guid("EEB4C1AE-4DB2-4bdb-86D4-A429B27496A3")]
public interface IAXFarCards
{
    [DispId(1)]
    void InitDbConnection([In, MarshalAs(UnmanagedType.BStr)] string connectionString);

    [DispId(2)]
    [return: MarshalAs(UnmanagedType.I4)]
    int GetCardInfo(
        [In, MarshalAs(UnmanagedType.BStr)]             string card,
        [In, MarshalAs(UnmanagedType.VariantBool)]      bool   isTemplate,
        [In, MarshalAs(UnmanagedType.I4)]               int    cashDeskId,
        [Out, MarshalAs(UnmanagedType.VariantBool)] out bool   isActive,
        [Out, MarshalAs(UnmanagedType.I4)]          out int    discountNumber,
        [Out, MarshalAs(UnmanagedType.I8)]          out Int64  amount,
        [In, Out, MarshalAs(UnmanagedType.BStr)]    ref string ownerName,
        [In, Out, MarshalAs(UnmanagedType.I4)]      ref int    clientId
        );