C#使用Struct类型

Question

CS文件：
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Runtime.InteropServices; namespace AJAXEnabledWebApplication1.CSClasss
{
     //[StructLayout(LayoutKind.Sequential)]   
     public struct analogue
     {
         byte A_sta; //站号
         int A_id; //序号
         [MarshalAs(UnmanagedType.ByValArray, SizeConst = 40)]
         char[] A_name; //名称
         long A_address; //物理地址
         float A_factor; //系数
         float A_bottom; //底数
         byte A_clc; //
         byte A_flag; //越限标志         float A_up_yj; //越上限预警值
         float A_up_yj_jc; //解除越上限预警值
         float A_up_bj; //越上限报警值
         float A_up_bj_jc; //解除越上限报警值         float A_down_yj; //越下限预警值
         float A_down_yj_jc; //解除越下限预警值
         float A_down_bj; //越下限报警值
         float A_down_bj_jc; //解除越下限报警值
         float A_value; //数值
     }
     public unsafe class DataDll
    {
        [DllImport("DataDLL.dll")]
        public static extern IntPtr LoadAnaMem(int nIndex);
         public static unsafe analogue test()
        {
            analogue sData;
            sData = (analogue)Marshal.PtrToStructure(LoadAnaMem(470020), typeof(analogue));
            
            //pAna.A_flag = 1;
            sData.A_name = "zhxingway";
            return sData;
        }
        
    }
}编译时报错:错误 2 “AJAXEnabledWebApplication1.CSClasss.analogue.A_name”不可访问，因为它受保护级别限制 F:\WEB\Visual Studio 2005\Projects\ZedGraph\AJAXEnabledWebApplication1\CSClass\DataDll.cs 50 19 AJAXEnabledWebApplication1请各位朋友帮忙解决,谢谢.

Answer 1

public byte A_sta;

Answer 2

public char[] A_name; 

Answer 3

public struct analogue
{
public:
         byte A_sta;        //站号
         int A_id;        //序号
         [MarshalAs(UnmanagedType.ByValArray, SizeConst = 40)]
         char[] A_name;    //名称
         long A_address;    //物理地址
         float A_factor;    //系数
         float A_bottom;    //底数
         byte A_clc;        //
         byte A_flag;        //越限标志         float A_up_yj;    //越上限预警值
         float A_up_yj_jc;    //解除越上限预警值
         float A_up_bj;    //越上限报警值
         float A_up_bj_jc;    //解除越上限报警值         float A_down_yj;        //越下限预警值
         float A_down_yj_jc;    //解除越下限预警值
         float A_down_bj;        //越下限报警值
         float A_down_bj_jc;    //解除越下限报警值
         float A_value;        //数值
}

Answer 4

char[] A_name;   ---》改为
public char[] A_name;   

Answer 5

 sData.A_name = "zhxingway";
要改为
sData.A_name = "zhxingway".ToCharArray();

Answer 6

 char[] A_name;
---------------
  public char[] A_name;
可能public string A_name;更好点

Answer 7

public     char[] A_name;    //名称

Answer 8

如果不加修饰符默认是Private,在成员变量前面加上public吧....

Answer 9

你需要读写的字段都需要加上public

Answer 10

楼主，改成这样试试：
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]    
    public struct analogue //遥测数据
    {
        public byte A_sta; //站号
        public int A_id; //序号
        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 40)]
        public byte[] A_name; //名称 原来是Char的
        public int A_address; //物理地址
        public float A_factor; //系数
        public float A_bottom; //底数
        public byte A_clc; //
        public byte A_flag; //越限标志        public float A_up_yj; //越上限预警值
        public float A_up_yj_jc; //解除越上限预警值
        public float A_up_bj; //越上限报警值
        public float A_up_bj_jc; //解除越上限报警值        public float A_down_yj; //越下限预警值
        public float A_down_yj_jc; //解除越下限预警值
        public float A_down_bj; //越下限报警值
        public float A_down_bj_jc; //解除越下限报警值
        public float A_value; //数值
    }  

Answer 11

你在所有的面前加上PUBLIC看行不？

Answer 12

        public static void Main(string[] args)
        {
           
            DataInfo info;
            info.i = 5;
            Console.WriteLine(info.i);
            Console.ReadLine();
        }        public struct DataInfo
        {
            public int i;
        }
试了一下,public可以解决