C# ToCharArray 不适用于 char*

Question

我有以下结构:

[StructLayout(LayoutKind.Sequential, Pack = 1, CharSet = CharSet.Unicode)]
unsafe public struct Attributes
{

    public OrderCommand Command { get; set; }

    public int RefID { get; set; }

    public fixed char MarketSymbol[30];
}

现在，我想将字符写入字段 MarketSymbol:

string symbol = "test";
Attributes.MarketSymbol = symbol.ToCharArray();

编译器抛出一个错误，说它无法从 char[] 转换为 char*。我怎么写这个？谢谢

Answer 1

像这样:

[StructLayout(LayoutKind.Sequential, Pack = 1, CharSet = CharSet.Unicode)]
public struct Attributes
{
    public OrderCommand Command { get; set; }
    public int RefID { get; set; }
    [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 30)]
    public string MarketSymbol;
}

注意 pack = 1，这是很不寻常的。如果这与 C 代码互操作，那么 CharSet.Ansi 的可能性很大。