用C ++编写的编组二进制数据文件和我的C＃代码 [英] marshal binary data file, written with C++, with my C# code

问题描述

我需要使用我的C＃

应用程序读取由C ++程序编写的二进制数据文件。

如何编组我用C＃代码读取的字节。 NET类型。


数据是数字（整数浮点数等等）和字符串。


我查看了Marshal类，但是不知道如何使用它与文件。

请添加几行代码。


非常感谢

解决方案

这里是我用来读取由C ++存储的字符串作为IntPtr的东西

公共类MarshalUtil

{

IntPtr m_objData = IntPtr.Zero;

int m_nPosition = 0;


public MarshalUtil（IntPtr objData）

{

m_objData = objData;

}


public string ReadString（）

{

ArrayList objBytes = new ArrayList（）;

byte byt;

string strData ="" ;;


while（（byt = Marshal.ReadByte（ m_objData，m_nPosition））！= 0）

{

strData + =（char）byt;

m_nPosition + = 2;

}


m_nPosition + = 2;


返回strData;

}


public bool MoreData

{

get

{

return（Marshal） .ReadByte（m_objData，m_nPosition）！= 0）;

}

}

}

谢谢bb，


那么整数漂浮和双打怎么样，如何整理它们？


:)

bb写道：

这里是我用来读取C ++作为IntPtr存储的字符串
<公共类MarshalUtil
{
IntPtr m_objData = IntPtr.Zero;
int m_nPosition = 0;

公共MarshalUtil（IntPtr objData）
{
m_objData = objData;
}
公共字符串ReadString（）
{/> ArrayList objBytes = new ArrayList （）;
字节byt;
字符串strData ="" ;;

while（（byt = Marshal.ReadByte（m_objData，m_nPosition））！= 0）
{
strData + =（char）byt;
m_nPosition + = 2;
}

m_nPosition + = 2;

返回strData;
}

对于大字符串来说，这将是非常低效的 - 你应该在

至少使用一个StringBuilder的。你似乎也忽略了每隔一个字节的
- 我不相信上面的字符串将用于包含U + 00FF以上的Unicode字符的字符串

。相反，你应该阅读

*两个*字节，然后向左移动一个8位。


Jon

I need to read binary data file written by C++ program, using my C#
application.
How do i marshal the bytes i read with my C# code to .NET types.

The data is numbers (integers float doubles etc..) and strings.

I looked at the Marshal class but did not know how to use it with file.
Please add few code lines.

Thanks alot

解决方案

here is something i use for reading a string stored by C++ as an IntPtr
public class MarshalUtil
{
IntPtr m_objData = IntPtr.Zero;
int m_nPosition = 0;

public MarshalUtil(IntPtr objData)
{
m_objData = objData;
}

public string ReadString()
{
ArrayList objBytes = new ArrayList();
byte byt;
string strData = "";

while((byt = Marshal.ReadByte(m_objData, m_nPosition)) != 0)
{
strData += (char) byt;
m_nPosition += 2;
}

m_nPosition += 2;

return strData;
}

public bool MoreData
{
get
{
return (Marshal.ReadByte(m_objData, m_nPosition) != 0);
}
}
}

Thanks bb,

And what about integers float and doubles, how to marshal them ?

:)

bb wrote:

here is something i use for reading a string stored by C++ as an IntPtr

public class MarshalUtil
{
IntPtr m_objData = IntPtr.Zero;
int m_nPosition = 0;

public MarshalUtil(IntPtr objData)
{
m_objData = objData;
}

public string ReadString()
{
ArrayList objBytes = new ArrayList();
byte byt;
string strData = "";

while((byt = Marshal.ReadByte(m_objData, m_nPosition)) != 0)
{
strData += (char) byt;
m_nPosition += 2;
}

m_nPosition += 2;

return strData;
}

That will be hideously inefficient with large strings - you should at
the very least be using a StringBuilder. You also seem to be ignoring
every other byte - I don''t believe the above will work with strings
containing Unicode characters above U+00FF. Instead, you should read
*two* bytes, and shift one left by 8 bits.

Jon

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