编组C结构的C＃ [英] Marshaling c structures in c#

问题描述

我有一个'C'DLL，可以采取结构作为输入，我要调用的dll从我的C＃程序

休耕是样品的结构，我有在C，我有元帅这些结构在我的C＃code

是我在做正确的还是错误？

实际的C结构：

  typedef结构的过程
{
  字符code [8];
}程序;
typedef结构的DateField
{
  CHAR日[10];
}的DateField;
typedef结构p45_clsgs
{
  程序p45_clsg;
  的DateField p45_clsgdte;
} p45_clsgs;
 

C＃：

  [StructLayout（LayoutKind.Sequential），序列化]
结构程序
{
//字符code [];
[MarshalAsAttribute（UnmanagedType.ByValTStr，SizeConst = 8）]
公共字符串code;
}
[StructLayout（LayoutKind.Sequential），序列化]
结构的DateField
{
// CHAR日[10];
[MarshalAsAttribute（UnmanagedType.ByValTStr，SizeConst = 10）]
公共字符串日期;
}结构p45_clsgs
{
    公共过程p45_clsg;
    公众的DateField p45_clsgdte;
}
 

是我的C＃结构是正确的C结构？

什么是休耕C语言结构相当于C＃结构

  typedef结构p45_cldxed24
{
  过程p45_cldxed [8];
} p45_cldxed24;
 

解决方案

的（划伤我原来的答复）的

您需要在每个结构的顶部有这样的：

  [StructLayout（LayoutKind.Sequential，字符集= CharSet.Ansi）
 

请注意在字符集命名参数。这一点很重要，否则你会与wchar_t的数组，而不是字符数组结束。

i have one 'C' 'DLL' which can take structures as input, i have to call that dll from my c# program

fallowing are the sample structures i have in c, i have to marshal those structures in my c# code

is i'm doing correct or wrong?

Actual C structures:

typedef struct procedure
{
  char code[8];
}procedure;


typedef struct datefield
{
  char date[10];
}datefield;


typedef struct p45_clsgs
{
  procedure p45_clsg;
  datefield p45_clsgdte;
}p45_clsgs;

C#:

[StructLayout(LayoutKind.Sequential), Serializable]
struct procedure
{
//char code[];
[MarshalAsAttribute(UnmanagedType.ByValTStr, SizeConst = 8)]
public string code;
}
[StructLayout(LayoutKind.Sequential), Serializable]
struct datefield
{
//char date[10];
[MarshalAsAttribute(UnmanagedType.ByValTStr, SizeConst = 10)]
public string date;
}

struct p45_clsgs
{    
    public procedure p45_clsg;
    public datefield p45_clsgdte;
}

Is my C# structs are correct for the C structs?

What is the equivalent C# structure for the fallowing c structure

typedef struct p45_cldxed24
{
  procedure p45_cldxed[8];
}p45_cldxed24;

解决方案

(Scratch my original answer)

You need to have this at the top of each struct:

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]

Note the CharSet named parameter. That's important, or you'll end up with wchar_t arrays instead of char arrays.

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