如何初始化固定字節數組？

Question

我有以下結構：

[StructLayout(LayoutKind.Sequential, Pack = 1)]
struct cAuthLogonChallenge
{
    byte cmd;
    byte error;
    fixed byte name[4];

    public cAuthLogonChallenge()
    {
        cmd = 0x04;
        error = 0x00;
        name = ???
    }
}

name應該是一個以空值結尾的ASCII字符串，Visual Studio拒絕了我所有與之交互的想法。 如何設置？

Answer 1

您需要切換到不安全模式才能使用固定語句

http://msdn.microsoft.com/en-us/library/f58wzh21%28v=VS.80%29.aspx

http://msdn.microsoft.com/en-us/library/chfa2zb8%28v=VS.80%29.aspx

http://msdn.microsoft.com/en-us/library/zycewsya%28v=VS.80%29.aspx

將您的結構定義更改為unsafe struct ...然后可以像在c / c ++中那樣初始化數組

Answer 2

得到它了：

[StructLayout(LayoutKind.Sequential, Pack = 1)]
unsafe struct cAuthLogonChallenge
{
    byte cmd;
    byte error;
    fixed byte name[4];

    public cAuthLogonChallenge(byte dummy)
    {
        cmd = 0x04;
        error = 0x00;
        fixed (byte* p = this.name)
        {
            *p = (byte)'J';
            *(p + 1) = (byte)'o';
            *(p + 2) = (byte)'n';
            *(p + 3) = 0;
        }
    }
}