试图将一些C ++结构移植到C＃问题。 [英] trying to port some C++ structures to C# problem.

问题描述

我正在尝试将一些C ++结构移植到C＃但我遇到麻烦这个

一个。

注意：这是一个文件记录，所以我必须保留这个格式。


#pragma pack（push，1）

typedef struct {

char title [80];


DWORD dwCount;

} STLHEADER，* LPSTLHEADER;

#pragma pack（pop）


使用Google我发现这可以移植到这个C＃变体，

注意''Marshal''来创建一个80字节的数组。


[StructLayout（LayoutKind.Sequential，Pack = 1）]

内部结构STLHEADER {

[MarshalAs（UnmanagedType.U1，SizeConst = 80）]

public char [] title;


public int dwCount;

}


到目前为止一切顺利，但现在我被困在这条线上sizeof（STLHEADER）需要

不安全的功能。

错误CS0208：无法获取托管

类型变量的地址或大小（''MySpace .STLHEADER''）

它与Marshal的事情有关。

我可以替换sizeof（STLHEADER）。 80 + 4，但我真的更喜欢

来获得更专业的解决方案。

也许还有另一种方法来定义''char title [80]''字节

数组？


感谢您的任何反馈。 :-)


-
http：/ /www.skyscan.be

I am trying to port some C++ structures to C# but I have troubles with this
one.
Note: this is a file record, so I must keep this format.

#pragma pack( push, 1 )
typedef struct {
char title[80];

DWORD dwCount;
} STLHEADER, *LPSTLHEADER;
#pragma pack( pop )

Using Google I discovered that this could be ported to this C# variant,
note the ''Marshal'' to create a 80 byte array.

[StructLayout(LayoutKind.Sequential, Pack=1)]
internal struct STLHEADER {
[MarshalAs (UnmanagedType.U1, SizeConst=80)]
public char[] title;

public int dwCount;
}

So far so good, but now I am stuck on this line "sizeof(STLHEADER)" needed
in a unsafe function.
error CS0208: Cannot take the address or size of a variable of a managed
type (''MySpace.STLHEADER'')

And it has something to do with the Marshal thing.
I could replace the "sizeof(STLHEADER)" with 80+4 but I would really prefer
to have a more professional sollution.
Maybe there is another alternative way to define a ''char title[80]'' byte
array?

Thanks for any feedback. :-)

--
http://www.skyscan.be

推荐答案

由于你的struct使用引用类型（char []），你需要使用

System.Runtime.InteropServices.Marshal.SizeOf确定结构大小

的方法。


还有一件事;你应该将char []成员更改为byte []。

否则，你的数据将无法正确解析，因为C＃中的char [80]实际上是
160字节的大小。

byte []在C＃中是什么char []在C ++中。

-

问候，

DennisJDMyrén

Oslo Kodebureau

" Olaf Baeyens" <醇********** @ skyscan.be>在消息中写道

news：41 ********************** @ news.skynet.be ...

Since you struct is using reference types(char []) you will need to use the
System.Runtime.InteropServices.Marshal.SizeOf method to determine the size
of your structure.

One more thing; you should change the char [] member into a byte [].
Otherwise, your data will not be parsed correctly, since char [80] in C# is
actually
160 bytes of size.
byte [] is in C# what char [] was in C++.
--
Regards,
Dennis JD Myrén
Oslo Kodebureau
"Olaf Baeyens" <ol**********@skyscan.be> wrote in message
news:41**********************@news.skynet.be...

我正在尝试将一些C ++结构移植到C＃但我遇到了麻烦。
注意：这是一个文件记录，所以我必须保留这种格式。

#pragma pack（push，1）
typedef struct {
char title [80];

DWORD dwCount;
} STLHEADER，* LPSTLHEADER;
#pragma pack（pop）

使用Google我发现这可以移植到这个C＃变体，
注意''Marshal''来创建一个80字节的数组。 />
[StructLayout（LayoutKind.Sequential，Pack = 1）]
内部结构STLHEADER {
[MarshalAs（UnmanagedType.U1，SizeConst = 80）]
public char []标题;

public int dwCount;
}

到目前为止一直很好，但现在我被困在这条线上sizeof（STLHEADER）。
错误CS0208：无法获取ma变量的地址或大小naged
type（''MySpace.STLHEADER''）

它与Marshal的事情有关。
我可以替换sizeof（STLHEADER）。 80 + 4，但我真的希望
更专业的解决方案。
也许还有另一种方法来定义''char title [80]''byte
阵列？

感谢您的任何反馈。 :-)

-
http：//www.skyscan .be

I am trying to port some C++ structures to C# but I have troubles with this
one.
Note: this is a file record, so I must keep this format.

#pragma pack( push, 1 )
typedef struct {
char title[80];

DWORD dwCount;
} STLHEADER, *LPSTLHEADER;
#pragma pack( pop )

Using Google I discovered that this could be ported to this C# variant,
note the ''Marshal'' to create a 80 byte array.

[StructLayout(LayoutKind.Sequential, Pack=1)]
internal struct STLHEADER {
[MarshalAs (UnmanagedType.U1, SizeConst=80)]
public char[] title;

public int dwCount;
}

So far so good, but now I am stuck on this line "sizeof(STLHEADER)"
needed
in a unsafe function.
error CS0208: Cannot take the address or size of a variable of a managed
type (''MySpace.STLHEADER'')

And it has something to do with the Marshal thing.
I could replace the "sizeof(STLHEADER)" with 80+4 but I would really
prefer
to have a more professional sollution.
Maybe there is another alternative way to define a ''char title[80]'' byte
array?

Thanks for any feedback. :-)

--
http://www.skyscan.be

和;

更改

[MarshalAs （UnmanagedType.U1，SizeConst = 80）]

进入

[MarshalAs（UnmanagedType.ByValArray，SizeConst = 80）]


所以，现在我们得到了：

[StructLayout（LayoutKind.Sequential，Pack = 1）]

内部结构STLHEADER

{

[MarshalAs（UnmanagedType.ByValArray，SizeConst = 80）]

public byte [] title;

public int dwCount;

}

-

问候，

DennisJDMyrén

奥斯陆Kodebureau

"DennisMyrén" <德**** @ oslokb.no>在消息中写道

news：2n ******************** @ news4.e.nsc.no ...

And;
change
[MarshalAs (UnmanagedType.U1, SizeConst=80)]
into
[MarshalAs (UnmanagedType.ByValArray, SizeConst=80)]

So, now we have got:
[StructLayout(LayoutKind.Sequential, Pack = 1)]
internal struct STLHEADER
{
[MarshalAs (UnmanagedType.ByValArray, SizeConst = 80)]
public byte [] title;
public int dwCount;
}
--
Regards,
Dennis JD Myrén
Oslo Kodebureau
"Dennis Myrén" <de****@oslokb.no> wrote in message
news:2n********************@news4.e.nsc.no...

由于你的struct使用引用类型（char []），你需要使用
System.Runtime.InteropServices.Marshal.SizeOf方法来确定结构的大小
。

还有一件事;你应该将char []成员更改为byte []。
否则，你的数据将无法正确解析，因为C＃
中的char [80]实际上是160字节大小。
byte []在C＃中是什么char []在C ++中。

-
问候，
DennisJDMyrén
Oslo Kodebureau Olaf Baeyens <醇********** @ skyscan.be>在消息中写道
新闻：41 ********************** @ news.skynet.be ...

Since you struct is using reference types(char []) you will need to use
the
System.Runtime.InteropServices.Marshal.SizeOf method to determine the size
of your structure.

One more thing; you should change the char [] member into a byte [].
Otherwise, your data will not be parsed correctly, since char [80] in C#
is actually
160 bytes of size.
byte [] is in C# what char [] was in C++.
--
Regards,
Dennis JD Myrén
Oslo Kodebureau
"Olaf Baeyens" <ol**********@skyscan.be> wrote in message
news:41**********************@news.skynet.be...

I我试图将一些C ++结构移植到C＃但是我有麻烦这个
一个。
注意：这是一个文件记录，所以我必须保持这种格式。

#pragma pack（push，1）
typedef struct {
char title [80];

DWORD dwCount;
} STLHEADER，* LPSTLHEADER;
#pragma pack（pop）

使用Google我发现这可以移植到这个C＃变体，
注意''Marshal''来创建一个80字节的数组。 />
[StructLayout（LayoutKind.Sequential，Pack = 1）]
内部结构STLHEADER {
[MarshalAs（UnmanagedType.U1，SizeConst = 80）]
public char []标题;

public int dwCount;
}

到目前为止一直很好，但现在我被困在这条线上sizeof（STLHEADER）。
错误CS0208：无法获取ma变量的地址或大小naged
type（''MySpace.STLHEADER''）

它与Marshal的事情有关。
我可以替换sizeof（STLHEADER）。 80 + 4，但我真的希望
更专业的解决方案。
也许还有另一种方法来定义''char title [80]''byte
阵列？

感谢您的任何反馈。 :-)

-
http：//www.skyscan .be

I am trying to port some C++ structures to C# but I have troubles with
this
one.
Note: this is a file record, so I must keep this format.

#pragma pack( push, 1 )
typedef struct {
char title[80];

DWORD dwCount;
} STLHEADER, *LPSTLHEADER;
#pragma pack( pop )

Using Google I discovered that this could be ported to this C# variant,
note the ''Marshal'' to create a 80 byte array.

[StructLayout(LayoutKind.Sequential, Pack=1)]
internal struct STLHEADER {
[MarshalAs (UnmanagedType.U1, SizeConst=80)]
public char[] title;

public int dwCount;
}

So far so good, but now I am stuck on this line "sizeof(STLHEADER)"
needed
in a unsafe function.
error CS0208: Cannot take the address or size of a variable of a managed
type (''MySpace.STLHEADER'')

And it has something to do with the Marshal thing.
I could replace the "sizeof(STLHEADER)" with 80+4 but I would really
prefer
to have a more professional sollution.
Maybe there is another alternative way to define a ''char title[80]'' byte
array?

Thanks for any feedback. :-)

--
http://www.skyscan.be

不确定为什么你需要这个尺码，但你必须：
- 将数组元素声明为UnmanagedType.ByValArray，并且

- 使用Marshal.SizeOf方法获取结构的封送大小。


[StructLayout（LayoutKind.Sequential，Pack = 1）]

内部结构STLHEADER {

[MarshalAs（UnmanagedType.ByValArray，SizeConst = 80）]

public char [] title;

public int dwCount;

}


... 。

STLHEADER stlh = new STLHEADER（）;

int marshaledSizeOfStruct = Marshal.SizeOf（stlh）; //应该是84

Willy。

" Olaf Baeyens" <醇********** @ skyscan.be>在消息中写道

news：41 ********************** @ news.skynet.be ...

Not sure why you need this size for, but you have to:
- Declare the array element as UnmanagedType.ByValArray, and
- use the Marshal.SizeOf method to get the marshaled size of a struct.

[StructLayout(LayoutKind.Sequential, Pack=1)]
internal struct STLHEADER {
[MarshalAs (UnmanagedType.ByValArray, SizeConst=80)]
public char[] title;
public int dwCount;
}

....
STLHEADER stlh = new STLHEADER();
int marshaledSizeOfStruct = Marshal.SizeOf(stlh); // should be 84

Willy.
"Olaf Baeyens" <ol**********@skyscan.be> wrote in message
news:41**********************@news.skynet.be...

我正在尝试将一些C ++结构移植到C＃但我遇到了麻烦。
注意：这是一个文件记录，所以我必须保留这种格式。

#pragma pack（push，1）
typedef struct {
char title [80];

DWORD dwCount;
} STLHEADER，* LPSTLHEADER;
#pragma pack（pop）

使用Google我发现这可以移植到这个C＃变体，
注意''Marshal''来创建一个80字节的数组。 />
[StructLayout（LayoutKind.Sequential，Pack = 1）]
内部结构STLHEADER {
[MarshalAs（UnmanagedType.U1，SizeConst = 80）]
public char []标题;

public int dwCount;
}

到目前为止一直很好，但现在我被困在这条线上sizeof（STLHEADER）。
错误CS0208：无法获取ma变量的地址或大小naged
type（''MySpace.STLHEADER''）

它与Marshal的事情有关。
我可以替换sizeof（STLHEADER）。 80 + 4，但我真的希望
更专业的解决方案。
也许还有另一种方法来定义''char title [80]''byte
阵列？

感谢您的任何反馈。 :-)

-
http：//www.skyscan .be

I am trying to port some C++ structures to C# but I have troubles with this
one.
Note: this is a file record, so I must keep this format.

#pragma pack( push, 1 )
typedef struct {
char title[80];

DWORD dwCount;
} STLHEADER, *LPSTLHEADER;
#pragma pack( pop )

Using Google I discovered that this could be ported to this C# variant,
note the ''Marshal'' to create a 80 byte array.

[StructLayout(LayoutKind.Sequential, Pack=1)]
internal struct STLHEADER {
[MarshalAs (UnmanagedType.U1, SizeConst=80)]
public char[] title;

public int dwCount;
}

So far so good, but now I am stuck on this line "sizeof(STLHEADER)"
needed
in a unsafe function.
error CS0208: Cannot take the address or size of a variable of a managed
type (''MySpace.STLHEADER'')

And it has something to do with the Marshal thing.
I could replace the "sizeof(STLHEADER)" with 80+4 but I would really
prefer
to have a more professional sollution.
Maybe there is another alternative way to define a ''char title[80]'' byte
array?

Thanks for any feedback. :-)

--
http://www.skyscan.be

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