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MarketSymbol字段:

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*.我该怎么写呢？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。如果与 C 代码互操作，CharSet.Ansi 的可能性很大。