用字符串数据C#调用Structure的C ++数组 [英] Call C++ array of Structure with string data C#

问题描述

嗨
我想将结构数组从vc6 dll传递到C#2010.我是C的新手
有人可以帮我提供示例代码吗?

谢谢

问候
ramesh

Hi
I want to pass a array of structure from vc6 dll to C# 2010. I am new to C sharp
can any one help me with a sample code

thanks

regards
ramesh

推荐答案

必要时在C#中定义一个具有[MarshalAs]属性的等效结构，并在C#中对方法MyStructure []进行签名.

Define an equivalent structure in C#, with [MarshalAs] attributes if necessary, and make the signature of the method MyStructure[] in C#.

namespace DLLTest
{
    public class Program
    {
        [StructLayout(LayoutKind.Sequential), Serializable]
        struct STdatapoint
        {
            int st_Exchange;
            int          st_product;
            int          st_High;
            int          st_Low;
            int          st_Tunover;
            int          st_Volume;
            //[MarshalAsAttribute(UnmanagedType.ByValTStr)]
            string           st_SymbolId;
            //[MarshalAsAttribute(UnmanagedType.ByValTStr)]
            string           st_USymbol;
        }


[DllImport("C:\\TADBAccess.dll", CallingConvention = CallingConvention.Cdecl)]
    rivate static extern void GetMasterData([Out, MarshalAs(UnmanagedType.SafeArray)] out STdatapoint[] strServerList, ref int NoOfElement, ref int Startpos);
    
       static void Main(string[] args)
       {
           STdatapoint[] Obj = new STdatapoint[5];
           //Marshal.StructureToPtr(
           int No = 4;
           int Ret = 1;
           GetMasterData(out Obj, ref No,  ref Ret);
         //  Console.ReadKey();
       }

我收到此错误

尝试读取或写入受保护的内存.这通常表明其他内存已损坏.

我在访问VC dll时在VC dll中使用safearray，出现此错误.给我任何想法.

谢谢

问候
ramesh

I am getting this error

Attempted to read or write protected memory. This is often an indication that other memory is corrupt.

I am using safearray in VC dll while accessing the VC dll , I am getting this error. Give me any idea.

thanks

regards
ramesh

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