帮我把C结构转换成C#

2019-05-27 00:54:12 阅读：174 来源： 互联网

标签：c c-2 pinvoke marshalling dllimport

我是C#的新手,需要帮助将C结构转换为C#. C结构如下：

#define QUE_ADDR_BUF_LENGTH 50
#define QUE_POST_BUF_LENGTH 11

typedef struct
    {
    const WCHAR *streetAddress;
    const WCHAR *city;
    const WCHAR *state;
    const WCHAR *country;
    const WCHAR *postalCode;
} QueSelectAddressType;

typedef struct
    {
    WCHAR   streetAddress[QUE_ADDR_BUF_LENGTH + 1];
    WCHAR   city[QUE_ADDR_BUF_LENGTH + 1];
    WCHAR   state[QUE_ADDR_BUF_LENGTH + 1];
    WCHAR   country[QUE_ADDR_BUF_LENGTH + 1];
    WCHAR   postalCode[QUE_POST_BUF_LENGTH + 1];
    } QueAddressType;

我无法对C结构进行更改,因为它们是由我尝试与之接口的API定义的.任何帮助,将不胜感激.

编辑：
这里有更多信息,我试图调用的dll中的函数声明如下：

#ifdef QUEAPI_EXPORTS
#define QueAPIExport __declspec(dllexport)
#elif defined QUEAPI_SERVER
#define QueAPIExport
#else
#define QueAPIExport __declspec(dllimport)
#endif

#ifdef __cplusplus
extern "C" {
#endif

typedef uint32 QuePointHandle;

QueAPIExport QueErrT16 QueCreatePointFromAddress
    (
    QueSelectAddressType*   addr,   // in:  Address data to search on.
    QuePointHandle*         point   // out: Handle to selected point. Must be closed with QueClosePoint.
    );

这是我如何定义DllImport：

[DllImport("QueAPI.DLL", EntryPoint = "QueCreatePointFromAddress")]
public static unsafe extern QueTypesnConst.QueErrT16 QueCreatePointFromAddress(QueTypesnConst.QueSelectAddressType *address, uint *point);

EDIT2：
以下代码块是问题的解决方案：
对于结构：

[StructLayout(LayoutKind.Sequential)]
public struct QueSelectAddressType
{
    [MarshalAsAttribute(UnmanagedType.LPWStr)]
    public string streetAddress;
    [MarshalAsAttribute(UnmanagedType.LPWStr)]
    public string city;
    [MarshalAsAttribute(UnmanagedType.LPWStr)]
    public string state;
    [MarshalAsAttribute(UnmanagedType.LPWStr)]
    public string country;
    [MarshalAsAttribute(UnmanagedType.LPWStr)]
    public string postalCode;
};

[StructLayout(LayoutKind.Sequential,CharSet=CharSet.Unicode)]
public struct QueAddressType
{
    [MarshalAsAttribute(UnmanagedType.ByValTStr, SizeConst=51)]
    public string streetAddress;
    [MarshalAsAttribute(UnmanagedType.ByValTStr, SizeConst = 51)]
    public string city;
    [MarshalAsAttribute(UnmanagedType.ByValTStr, SizeConst = 51)]
    public string state;
    [MarshalAsAttribute(UnmanagedType.ByValTStr, SizeConst = 51)]
    public string country;
    [MarshalAsAttribute(UnmanagedType.ByValTStr, SizeConst = 12)]
    public string postalCode;
};

对于DllImport：

[DllImport("QueAPI.DLL", EntryPoint = "QueCreatePointFromAddress")]
public static extern QueTypesnConst.QueErrT16 QueCreatePointFromAddress(ref QueTypesnConst.QueSelectAddressType address, ref uint point);

解决方法:

请尝试以下定义

public partial class NativeConstants {

    /// QUE_ADDR_BUF_LENGTH -> 50
    public const int QUE_ADDR_BUF_LENGTH = 50;

    /// QUE_POST_BUF_LENGTH -> 11
    public const int QUE_POST_BUF_LENGTH = 11;
}

[System.Runtime.InteropServices.StructLayoutAttribute(System.Runtime.InteropServices.LayoutKind.Sequential)]
public struct QueSelectAddressType {

    /// WCHAR*
    [System.Runtime.InteropServices.MarshalAsAttribute(System.Runtime.InteropServices.UnmanagedType.LPWStr)]
    public string streetAddress;

    /// WCHAR*
    [System.Runtime.InteropServices.MarshalAsAttribute(System.Runtime.InteropServices.UnmanagedType.LPWStr)]
    public string city;

    /// WCHAR*
    [System.Runtime.InteropServices.MarshalAsAttribute(System.Runtime.InteropServices.UnmanagedType.LPWStr)]
    public string state;

    /// WCHAR*
    [System.Runtime.InteropServices.MarshalAsAttribute(System.Runtime.InteropServices.UnmanagedType.LPWStr)]
    public string country;

    /// WCHAR*
    [System.Runtime.InteropServices.MarshalAsAttribute(System.Runtime.InteropServices.UnmanagedType.LPWStr)]
    public string postalCode;
}

[System.Runtime.InteropServices.StructLayoutAttribute(System.Runtime.InteropServices.LayoutKind.Sequential, CharSet=System.Runtime.InteropServices.CharSet.Unicode)]
public struct QueAddressType {

    /// WCHAR[51]
    [System.Runtime.InteropServices.MarshalAsAttribute(System.Runtime.InteropServices.UnmanagedType.ByValTStr, SizeConst=51)]
    public string streetAddress;

    /// WCHAR[51]
    [System.Runtime.InteropServices.MarshalAsAttribute(System.Runtime.InteropServices.UnmanagedType.ByValTStr, SizeConst=51)]
    public string city;

    /// WCHAR[51]
    [System.Runtime.InteropServices.MarshalAsAttribute(System.Runtime.InteropServices.UnmanagedType.ByValTStr, SizeConst=51)]
    public string state;

    /// WCHAR[51]
    [System.Runtime.InteropServices.MarshalAsAttribute(System.Runtime.InteropServices.UnmanagedType.ByValTStr, SizeConst=51)]
    public string country;

    /// WCHAR[12]
    [System.Runtime.InteropServices.MarshalAsAttribute(System.Runtime.InteropServices.UnmanagedType.ByValTStr, SizeConst=12)]
    public string postalCode;
}

标签：c,c-2,pinvoke,marshalling,dllimport
来源： https://codeday.me/bug/20190527/1159556.html

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帮我把C结构转换成C#