C# 如何访问公共(public)结构的静态字段

Question

我正在尝试访问已定义为公共(public)的 struct 的 static 字段。但是，我仍然“由于其保护级别而无法访问”有人可以帮助我吗？

public class Program
{
    public struct AT_CMD
    {
        static int x = 7;
       static  byte[] cmd_mode = new byte[3] { 0x2B, 0x2B, 0x2B };
       static  byte[] end_device_assoc = new byte[4] { 0x41, 0x54, 0x41, 0x31 };
      //should be 0 for end device, default is 0
       static  byte[] data_rate = new byte[4] { 0x41, 0x54, 0x42, 0x44 }; //3 for 9600, 5 for 38400
       static  byte[] channel = new byte[4] { 0x41, 0x54, 0x43, 0x48 }; //0x0B-0x1A
       static  byte[] Dest_addr_high = new byte[4] { 0x41, 0x54, 0x44, 0x48 }; //0 FOR 16bit
       static  byte[] Dest_addr_low = new byte[4] { 0x41, 0x54, 0x44, 0x4C };
       static  byte[] my_addr = new byte[4] { 0x41, 0x54, 0x4D, 0x59 }; // 0-0xFFFF
       static  byte[] carriage_return = new byte[1] { 0x0D };
   }  

    static void Main()
    {
        int y = AT_CMD.x;
    }
}

Answer 1

将其更改为:

  public struct AT_CMD
  {
        public static int x = 7;

        // ...
  }  

只是制作一个struct public 不会影响它的成员，struct 的成员将是private 默认情况下，除非您另有说明。

更新:解决默认访问的混淆问题，internal 是struct 或class 的默认访问如果在命名空间级别声明(不嵌套在另一个类/结构中)本身:

Classes and structs that are declared directly within a namespace (in other words, that are not nested within other classes or structs) can be either public or internal. Internal is the default if no access modifier is specified.

然而，class 或 struct 中的字段始终默认为 private:

The access level for class members and struct members, including nested classes and structs, is private by default.

来自MSDN .