C#中将结构类型数据存储到二进制文件中方法

以往在vb6,vc6中都有现成的方法将结构类型数据写入和读取到二进制文件中，但是在c#中却没有现成的方法来实现，因此我查阅了一些资料，借鉴了网上一些同学的做法，自己写了个类似的例子来读写结构类型数据到二进制文件中，废话不多说了，先上代码：

using System;

using System.IO;

using System.Runtime.InteropServices;

using System.Windows.Forms;

namespace WindowsFormsApplication1

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

string filename = @"d:\testbinary.st";

        #region 结构体

        [StructLayout(LayoutKind.Sequential), Serializable]

        public struct MY_STRUCT

        {

            public double x;          //点的经度坐标

            public double y;          //点的纬度坐标

            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 40)]

            public string Name;        //Name[40]; //名称

            public long PointID;  //点的ID号

            public long TypeCode; //客户不使用该字段

        }

        #endregion

public void WriteInfo(byte[] bt)

        {

            if (File.Exists(filename))

            {

                File.Delete(filename);

                return;

            }

FileStream fs = new FileStream(filename, FileMode.Create);

            BinaryWriter bw = new BinaryWriter(fs);

            bw.Write(bt);

            bw.Flush();

bw.Close();

            fs.Close();

MessageBox.Show("保存成功!");

        }

public byte[] ReadInfo(string file)

        {

            FileStream fs = new FileStream(file, FileMode.Open);

            BinaryReader br = new BinaryReader(fs);

byte[] bt = br.ReadBytes(144);

            br.Close();

            fs.Close();

return bt;

        }

private MY_STRUCT Byte2Struct(byte[] arr)

        {

            int structSize = Marshal.SizeOf(typeof(MY_STRUCT));

            IntPtr ptemp = Marshal.AllocHGlobal(structSize);

            Marshal.Copy(arr, 0, ptemp, structSize);

            MY_STRUCT rs = (MY_STRUCT)Marshal.PtrToStructure(ptemp, typeof(MY_STRUCT));

            Marshal.FreeHGlobal(ptemp);

            return rs;

        }

private byte[] Struct2Byte(MY_STRUCT s)

        {

            int structSize = Marshal.SizeOf(typeof(MY_STRUCT));

            byte[] buffer = new byte[structSize];

            //分配结构体大小的内存空间

            IntPtr structPtr = Marshal.AllocHGlobal(structSize);

            //将结构体拷到分配好的内存空间

            Marshal.StructureToPtr(s, structPtr, false);

            //从内存空间拷到byte数组

            Marshal.Copy(structPtr, buffer, 0, structSize);

            //释放内存空间

            Marshal.FreeHGlobal(structPtr);

            return buffer;

        }

private void button1_Click(object sender, EventArgs e)

        {

            MY_STRUCT[] arr = new MY_STRUCT[2];

MY_STRUCT np = new MY_STRUCT();

            np.x = 112.123456;

            np.y = 21.56789;

            np.Name = "深圳市政府1";

            np.PointID = Convert.ToInt64(1234);

            np.TypeCode = Convert.ToInt64(65);

arr[0] = np;

np = new MY_STRUCT();

            np.x = 113.123456;

            np.y = 22.56789;

            np.Name = "深圳市政府2";

            np.PointID = Convert.ToInt64(1235);

            np.TypeCode = Convert.ToInt64(66);

arr[1] = np;

int structSize = Marshal.SizeOf(typeof(MY_STRUCT));

            byte[] temp = new byte[structSize * arr.Length];

            byte[] temp1 = Struct2Byte(arr[0]);

            byte[] temp2 = Struct2Byte(arr[1]);

Array.Copy(temp1, 0, temp, 0, temp1.Length);

            Array.Copy(temp2, 0, temp, structSize, temp2.Length);

WriteInfo(temp);

}

private void button2_Click(object sender, EventArgs e)

        {

            byte[] bt = ReadInfo(filename);

int structSize = Marshal.SizeOf(typeof(MY_STRUCT));

            int num = bt.Length / structSize;

for (int i = 0; i < num; i++)

            {

                byte[] temp = new byte[structSize];

                Array.Copy(bt, i * structSize, temp, 0, structSize);

MY_STRUCT np = new MY_STRUCT();

                np = Byte2Struct(temp);

            }

}

    }

}