mhCardReader/ThCardReader/UpdateForm.cs

using System;
using System.ComponentModel;
using System.Diagnostics;
using System.Net;
using System.Windows.Forms;

namespace ThCardReader
{
    class UpdateForm : Form
    {
        private ProgressBar updateProgressBar;
        private Label progressLabel;
        private Button installButton;
        private readonly string version;
        private string filePath;

        public UpdateForm(string version)
        {
            this.version = version;
            InitializeComponent();
        }

        private void InitializeComponent()
        {
            this.updateProgressBar = new ProgressBar();
            this.progressLabel = new Label();
            this.installButton = new Button();
            this.SuspendLayout();
            // 
            // updateProgressBar
            // 
            this.updateProgressBar.Location = new System.Drawing.Point(22, 67);
            this.updateProgressBar.Name = "updateProgressBar";
            this.updateProgressBar.Size = new System.Drawing.Size(477, 34);
            this.updateProgressBar.TabIndex = 0;
            // 
            // progressLabel
            // 
            this.progressLabel.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(192)))), ((int)(((byte)(255)))), ((int)(((byte)(192)))));
            this.progressLabel.Font = new System.Drawing.Font("宋体", 12F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134)));
            this.progressLabel.Location = new System.Drawing.Point(505, 67);
            this.progressLabel.Name = "progressLabel";
            this.progressLabel.Size = new System.Drawing.Size(59, 34);
            this.progressLabel.TabIndex = 1;
            this.progressLabel.Text = "0%";
            this.progressLabel.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
            // 
            // installButton
            // 
            this.installButton.Font = new System.Drawing.Font("宋体", 12F);
            this.installButton.Location = new System.Drawing.Point(191, 141);
            this.installButton.Name = "installButton";
            this.installButton.Size = new System.Drawing.Size(210, 37);
            this.installButton.TabIndex = 2;
            this.installButton.Text = "下载中...";
            this.installButton.UseVisualStyleBackColor = true;
            this.installButton.Click += new System.EventHandler(this.InstallButtonClick);
            this.installButton.Enabled = false;
            // 
            // UpdateForm
            // 
            this.ClientSize = new System.Drawing.Size(576, 261);
            this.Controls.Add(this.installButton);
            this.Controls.Add(this.progressLabel);
            this.Controls.Add(this.updateProgressBar);
            this.Name = "UpdateForm";
            this.StartPosition = FormStartPosition.CenterScreen;
            this.Text = "读卡插件更新";
            this.Load += new EventHandler(this.UpdateForm_Load);
            this.ResumeLayout(false);

        }

        private void UpdateForm_Load(object sender, EventArgs e)
        {
            ExecuteUpdate();            
        }

        private void ExecuteUpdate()
        {
            filePath = String.Format("D:\\读卡插件-{0}.msi", version);
            using (WebClient webClient = new WebClient())
            {
                try
                {
                    webClient.DownloadFileCompleted += new AsyncCompletedEventHandler(ThDownloadCompleted);
                    webClient.DownloadProgressChanged += new DownloadProgressChangedEventHandler(ThDownloadProgressChanged);
                    webClient.DownloadFileAsync(new Uri("http://webhis.thyy.cn:8080/download/readcard/读卡插件.msi"), filePath);
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.Message, "系统提示", MessageBoxButtons.OK, MessageBoxIcon.Error);
                }
            }
        }

        private void ThDownloadCompleted(object sender, AsyncCompletedEventArgs e)
        {
            this.installButton.Text = "下载完成，点击安装";
            this.installButton.Enabled = true;
        }

        private void ThDownloadProgressChanged(object sender, DownloadProgressChangedEventArgs e)
        {
            this.updateProgressBar.Minimum = 0;
            this.updateProgressBar.Maximum = (int)e.TotalBytesToReceive;
            this.updateProgressBar.Value = (int)e.BytesReceived;
            this.progressLabel.Text = e.ProgressPercentage + "%";
        }

        private void InstallButtonClick(object sender, EventArgs e)
        {
            Process.Start(filePath);
            Process.GetCurrentProcess().Kill();          
        }
    }
}