在C中,我们可以通过以下方式访问guid的成员：

GUID guid = {0};
CoCreateGuid(&guid);
dwRand = guid.Data1 & 0x7FFFFFFF;

C中guid的结构是：

Data 1 - unsigned long
Data 2 - unsigned short
Data 3 - unsigned short
Data 4 - unsigned char

问题：如何翻译C代码中的第三行(dwRand = guid.Data1& 0x7FFFFFFF;).换句话说 – 如何访问guid成员？在C#中没有这样的东西.

提前致谢！

解决方法:

您可以创建一个结构：

public struct MyGuid
{
    public int Data1;
    public short Data2;
    public short Data3;
    public byte[] Data4;

    public MyGuid(Guid g)
    {
        byte[] gBytes = g.ToByteArray();
        Data1 = BitConverter.ToInt32(gBytes, 0);
        Data2 = BitConverter.ToInt16(gBytes, 4);
        Data3 = BitConverter.ToInt16(gBytes, 6);
        Data4 = new Byte[8];
        Buffer.BlockCopy(gBytes, 8, Data4, 0, 8);
    }

    public Guid ToGuid()
    {
        return new Guid(Data1, Data2, Data3, Data4);
    }
}

现在,如果你想修改一个Guid：

Guid g = GetGuidFromSomewhere();
MyGuid mg = new MyGuid(g);
mg.Data1 &= 0x7FFFFFFF;
g = mg.ToGuid();