我在一个类中有这个结构:
[System.Runtime.InteropServices.StructLayout(System.Runtime.InteropServices.LayoutKind.Sequential, Pack = 1)]
public struct MyStruct
{
public byte StartOfText;
public byte DisableChecksum;
public byte ProtocolVersion;
public byte Code;
public Int16 Size;
public byte[] Data;
public byte EndOfText;
public MyStruct(CommandCode commandCode, string commandData)
{
this.StartOfText = 0x02;
this.DisableChecksum = 0x00;
this.ProtocolVersion = 0x35;
this.Code = (byte)commandCode;
this.Size = (Int16)commandData.Length;
this.Data = new byte[commandData.Length];
this.Data = Encoding.ASCII.GetBytes(commandData);
this.EndOfText = 0x03;
}
public byte[] ToByteArray()
{
byte[] arr = null;
IntPtr ptr = IntPtr.Zero;
try
{
Int16 size = (Int16)Marshal.SizeOf(this);
arr = new byte[size];
ptr = Marshal.AllocHGlobal(size);
Marshal.StructureToPtr(this, ptr, true);
Marshal.Copy(ptr, arr, 0, size);
}
catch (Exception e)
{
MessageBox.Show(e.Message);
}
finally
{
Marshal.FreeHGlobal(ptr);
}
return arr;
}
}
现在,假设我在我的程序中初始化该结构的一个新实例,执行以下操作:
Protocol.MyStruct Cmd = new Protocol.MyStruct(CommandCode.LOAD_FILE, "TEST");
byte[] StructData = Cmd.ToByteArray();
初始化后,我可以看到 MyStruct.Data 正在使用字符串常量 (0x54、0x45、0x53、0x54) 的内容正确初始化。每个字符
但是当调用 MyStruct.TiByteArray() 并且我跟踪数组中的值时,数据部分现在是(0xa0、0xa6、0x91 和 0x03)。
数组的其余部分没问题,数据复制正确。
代码有什么问题或我错过了什么?
最佳答案
这在某些情况下可能有效。但是,Data 的长度是固定的。如果将 Data 定义为字符串,可能会更有用。
[StructLayout(LayoutKind.Sequential, Pack = 1)]
public struct MyStruct
{
const int ARRAY_SIZE = 100;
public byte StartOfText;
public byte DisableChecksum;
public byte ProtocolVersion;
public byte Code;
public Int16 Size;
[MarshalAs(UnmanagedType.ByValArray, SizeConst = ARRAY_SIZE)]
public byte[] Data;
public byte EndOfText;
public MyStruct(CommandCode commandCode, string commandData)
{
this.StartOfText = 0x02;
this.DisableChecksum = 0x00;
this.ProtocolVersion = 0x35;
this.Code = (byte)commandCode;
this.Size = (Int16)commandData.Length;
this.Data = new byte[ARRAY_SIZE];
byte[] bytes = Encoding.ASCII.GetBytes(commandData);
Array.Copy(bytes, Data, bytes.Length);
//this.Data = Encoding.ASCII.GetBytes(commandData);
this.EndOfText = 0x03;
}
public byte[] ToByteArray()
{
byte[] arr = null;
IntPtr ptr = IntPtr.Zero;
try
{
int size = Marshal.SizeOf(this);
arr = new byte[size];
ptr = Marshal.AllocHGlobal(size);
Marshal.StructureToPtr(this, ptr, true);
Marshal.Copy(ptr, arr, 0, size);
}
catch (Exception e)
{
MessageBox.Show(e.Message);
}
finally
{
Marshal.FreeHGlobal(ptr);
}
return arr;
}
}
关于c# - 在 C# 中将结构转换为 byte[],我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/18665562/