新建兩個界面 Form1和 FormBar

lable textbox button

label1 label2 button timer1 。timer的使能設置為true

代碼

using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows.Forms;namespace WindowsFormsApplication4 {public partial class Form1 : Form{public Form1(){InitializeComponent();}private void button1_Click(object sender, EventArgs e){BackgroundWorker worker = new BackgroundWorker();worker.WorkerSupportsCancellation = true;worker.DoWork += new DoWorkEventHandler(Calculate);worker.RunWorkerAsync();FormBar f = new FormBar(worker, "處理進度");f.ShowDialog(this);}public void Calculate(object sender, DoWorkEventArgs e){for (int i = 0; i < 1000000; i++){textBox1.Text = "1234";}}} } using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows.Forms;namespace WindowsFormsApplication4 {public partial class FormBar : Form{public FormBar(BackgroundWorker worker, string act){InitializeComponent();this.ControlBox = false;System.Windows.Forms.Control.CheckForIllegalCrossThreadCalls = false;worker.RunWorkerCompleted += new RunWorkerCompletedEventHandler(worker_RunWorkerCompleted);switch (act){case "加載進度":label1.Text = "加載數據中，請稍候";break;case "處理進度":label1.Text = "處理進度中，請稍候";break;default:label1.Text = "請稍候";break;}}public void worker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e){this.Close();//在這里不能進行跨線程調用}private void FormBar_Load(object sender, EventArgs e){label2.Text = "*";}private void timer1_Tick(object sender, EventArgs e){label2.Text += "*";if (label2.Text.Length > 50){label2.Text = "*";}}private void button1_Click(object sender, EventArgs e){if (MessageBox.Show("即將停止程序運行，確認是否退出？", "確認信息", MessageBoxButtons.OKCancel) == System.Windows.Forms.DialogResult.OK){System.Environment.Exit(0);GC.Collect();}}} }

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