将 C 函数和 DLL 结构类型正确转换/编组为 C#

Question

有人可以帮我将 C 结构/函数转换为 C# 吗？

我相信，如果我能够正确转换函数并正确编组我的结构，我就可以正确调用 DLL。

这是我的结构和使用它的函数：

typedef struct UIclient_info {
  char name[50];
  int age;
  SECONDUSER *stParent;
} FIRSTUSER;

typedef struct ui_product_form {    
  char m_sCoupon;
  double amountTotal;
  char m_sErrorCode[50];
  SUBPRODUCT *pstSubProduct;
} PRODUCT;

typedef struct tagReport
{
  REPORTSUMMARY *pstRepsum;
  char errorMsg[100];
} FINAL_REPORT;

int Save(FIRSTUSER *myUser, PRODUCT *uiStructure);
FINAL_REPORT GenerateReport(FIRSTUSER *myUser, PRODUCT *uiStructure);

Answer 1

这可能有效，也可能无效。你可以试试，我不知道我是否正确处理了指针。我无法就此提供任何其他支持。如果它有效，那么它就有效。如果没有的话……哦，好吧。

//typedef struct UIclient_info {
//  char name[50];
//  int age;
//  SECONDUSER *stParent;
//} FIRSTUSER;

[StructLayout(LayoutKind.Sequential, CharSet=CharSet.Ansi)]
public struct FirstUser
{
    [MarshalAs(UnmanagedType.ByValTStr, SizeConst=50)]
    public string Name;
    public int Age;
    [MarshalAs(UnmanagedType.LPStruct)]
    public IntPtr Parent;
}

//typedef struct ui_product_form {    
//  char m_sCoupon;
//  double amountTotal;
//  char m_sErrorCode[50];
//  SUBPRODUCT *pstSubProduct;
//} PRODUCT;

[StructLayout(LayoutKind.Sequential, CharSet=CharSet.Ansi)]
public struct Product
{
    public char Coupon;
    public double AmountTotal;
    [MarshalAs(UnmanagedType.ByValTStr, SizeConst=50)]
    public string ErrorCode;
    [MarshalAs(UnmanagedType.LPStruct)]
    public IntPtr SubProduct;
}

//typedef struct tagReport
//{
//  REPORTSUMMARY *pstRepsum;
//  char errorMsg[100];
//} FINAL_REPORT;

[StructLayout(LayoutKind.Sequential, CharSet=CharSet.Ansi)]
public struct FinalReport
{
    [MarshalAs(UnmanagedType.LPStruct)]
    public IntPtr ReportSummary;
    [MarshalAs(UnmanagedType.ByValTStr, SizeConst=100)]
    public string ErrorMsg;
}

static class MyLibraryHelper
{
    //int Save(FIRSTUSER *myUser, PRODUCT *uiStructure);

    [DllImport(@"MyLibrary.dll", CharSet=CharSet.Ansi)]
    internal static extern int Save(IntPtr myUser, IntPtr uiStructure);

    //FINAL_REPORT GenerateReport(FIRSTUSER *myUser, PRODUCT *uiStructure);

    [DllImport(@"MyLibrary.dll", CharSet=CharSet.Ansi)]
    internal static extern FinalReport GenerateReport(IntPtr myUser, IntPtr uiStructure);
}