BMS上位机(三)

总述

上位机开发中很少提及软件的升级，一般都是直接打包发送，相对不是很友好，有时无法及时更新软件中的问题和特性。

软件升级

流程

实现

下载文件

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;

namespace RemoteUpgrade
{
    class DownloadPack
    {
        public DownloadPack()
        { 
        
        }

        public delegate void UpdateState(int percent, bool is_error);
        public event UpdateState UpdateProcess;

        public bool DownloadFile(string url_path, string dest_path)
        {
            try
            {
                if (!Directory.Exists(dest_path))
                    Directory.CreateDirectory(dest_path);
                WebClient wc = new WebClient();
                string filename = "Update_NewVersion.zip";
                filename = Path.Combine(dest_path, filename);
                File.Delete(filename);
                //wc.DownloadFile(download, filename);
                wc.DownloadFileAsync(new Uri(url_path), filename);
                wc.DownloadProgressChanged += new DownloadProgressChangedEventHandler(wc_DownloadProgressChanged);
                wc.DownloadFileCompleted += new System.ComponentModel.AsyncCompletedEventHandler(wc_DownloadFileCompleted);
                //wc.Dispose();
            }
            catch(Exception e)
            {
                return false;
            }
            return true;
        }

        void wc_DownloadFileCompleted(object sender, System.ComponentModel.AsyncCompletedEventArgs e)
        {
            (sender as WebClient).Dispose();
            if (e.Error != null)
            {
                UpdateProcess(0, true);
            }
            else 
            {
                UpdateProcess(100, false);
            }
        }

        void wc_DownloadProgressChanged(object sender, DownloadProgressChangedEventArgs e)
        {
            if (e.ProgressPercentage < 100)
                UpdateProcess(e.ProgressPercentage, false);
        }
    }
}

解压文件

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using ICSharpCode.SharpZipLib.Zip;

namespace RemoteUpgrade
{
    class Unpack
    {
        public Unpack()
        { 
        
        }

        public bool UnZIP(string zipFilePath, string saveDirectory)
        {
            if (!File.Exists(zipFilePath))
            {
                return false;
            }
            try
            {

                if (!Directory.Exists(saveDirectory))
                {
                    //解压后存放的 文件夹路径
                    Directory.CreateDirectory(saveDirectory);
                }

     
                using (ZipInputStream s = new ZipInputStream(File.OpenRead(zipFilePath)))
                {

                    ZipEntry theEntry;
                    while ((theEntry = s.GetNextEntry()) != null)
                    {
                        string directoryName = Path.GetDirectoryName(theEntry.Name);
                        string fileName = Path.GetFileName(theEntry.Name);

                        // create directory
                        if (directoryName.Length > 0)
                        {
                            //创建目录
                            string saveDir = Path.Combine(saveDirectory, directoryName);
                            Directory.CreateDirectory(saveDir);
                        }

                        if (fileName != String.Empty)
                        {
                            string saveFilePath = Path.Combine(saveDirectory, theEntry.Name);
                            using (FileStream streamWriter = File.Create(saveFilePath))
                            {
                                int size = 2048;
                                byte[] data = new byte[2048];
                                while (true)
                                {
                                    size = s.Read(data, 0, data.Length);
                                    if (size > 0)
                                    {
                                        streamWriter.Write(data, 0, size);
                                    }
                                    else
                                    {
                                        break;
                                    }
                                }
                            }
                        }
                    }
                }
            }
            catch(Exception ex)
            {
                return false;
            }
            return true;
        
        }
    }
}

应用传参

ShellExecute(IntPtr.Zero, "open", 应用路径, 参数, null , 1);

总结

升级流程相对比较简单，但是要考虑异常情况的处理，防止升级后的软件打开情况，需要做好校验工作。

获取程序

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