摘要：
//////如果应释放托管资源，则为true；否则，它为false＝null））｛components.Dispose（）；｝基础处置；}#regionWindows窗体设计器生成的代码//////设计器支持的必需方法-不要修改///使用代码编辑器修改此方法的内容。
方法1：
button1.Enabled = false; TaskScheduler uiContext = TaskScheduler.FromCurrentSynchronizationContext(); Task t = Task.Factory.StartNew(async () => { for (int i = 0; i < 5; i++) { Console.WriteLine("任务1: " + DateTime.Now.ToString("ss.fff")); await Task.Delay(1000); } return 1; }).ContinueWith(m => { button1.Enabled = true; Console.WriteLine("任务1：结束"); }, uiContext);
方法2：
button2.Enabled = false; TaskScheduler ui = TaskScheduler.FromCurrentSynchronizationContext(); Task t = Task.Factory.StartNew(async () => { for (int i = 0; i < 5; i++) { Console.WriteLine("任务2: " + DateTime.Now.ToString("ss.fff")); await Task.Delay(1000); } return 1; }).ContinueWith(m => { this.Invoke(new MethodInvoker(() => { button2.Enabled = true; Console.WriteLine("任务2：结束"); })); });
using System; using System.Threading.Tasks; using System.Windows.Forms; namespace WindowsFormsApp1 { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void Form1_Load(object sender, EventArgs e) { } private void button1_Click(object sender, EventArgs e) { button1.Enabled = false; TaskScheduler ui = TaskScheduler.FromCurrentSynchronizationContext(); Task t = Task.Factory.StartNew(() => { for (int i = 0; i < 5; i++) { Console.WriteLine("任务1: " + DateTime.Now.ToString("ss.fff")); Task.Delay(1000).Wait(); } return 1; }).ContinueWith(m => { button1.Enabled = true; Console.WriteLine("任务1：结束"); }, ui); } private void button2_Click(object sender, EventArgs e) { button2.Enabled = false; TaskScheduler ui = TaskScheduler.FromCurrentSynchronizationContext(); Task t = Task.Factory.StartNew(() => { for (int i = 0; i < 5; i++) { Console.WriteLine("任务2: " + DateTime.Now.ToString("ss.fff")); Task.Delay(1000).Wait(); } return 1; }).ContinueWith(m => { ButtonEnabled(); }); } private void ButtonEnabled() { this.Invoke(new MethodInvoker(() => { button2.Enabled = true; Console.WriteLine("任务2：结束"); })); } private int i = 0; private void btnOperate_Click(object sender, EventArgs e) { lblMsg.Text = i++.ToString(); } } }
namespace WindowsFormsApp1 { partial class Form1 { /// <summary> /// 必需的设计器变量。 /// </summary> private System.ComponentModel.IContainer components = null; /// <summary> /// 清理所有正在使用的资源。 /// </summary> /// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param> protected override void Dispose(bool disposing) { if (disposing && (components != null)) { components.Dispose(); } base.Dispose(disposing); } #region Windows 窗体设计器生成的代码 /// <summary> /// 设计器支持所需的方法 - 不要修改 /// 使用代码编辑器修改此方法的内容。 /// </summary> private void InitializeComponent() { this.button1 = new System.Windows.Forms.Button(); this.btnOperate = new System.Windows.Forms.Button(); this.button2 = new System.Windows.Forms.Button(); this.label1 = new System.Windows.Forms.Label(); this.label2 = new System.Windows.Forms.Label(); this.lblMsg = new System.Windows.Forms.Label(); this.SuspendLayout(); // // button1 // this.button1.Location = new System.Drawing.Point(161, 51); this.button1.Name = "button1"; this.button1.Size = new System.Drawing.Size(75, 23); this.button1.TabIndex = 0; this.button1.Text = "开始"; this.button1.UseVisualStyleBackColor = true; this.button1.Click += new System.EventHandler(this.button1_Click); // // btnOperate // this.btnOperate.Location = new System.Drawing.Point(312, 62); this.btnOperate.Name = "btnOperate"; this.btnOperate.Size = new System.Drawing.Size(150, 99); this.btnOperate.TabIndex = 0; this.btnOperate.Text = "点开始后，再点我不阻塞"; this.btnOperate.UseVisualStyleBackColor = true; this.btnOperate.Click += new System.EventHandler(this.btnOperate_Click); // // button2 // this.button2.Location = new System.Drawing.Point(161, 127); this.button2.Name = "button2"; this.button2.Size = new System.Drawing.Size(75, 23); this.button2.TabIndex = 0; this.button2.Text = "开始"; this.button2.UseVisualStyleBackColor = true; this.button2.Click += new System.EventHandler(this.button2_Click); // // label1 // this.label1.AutoSize = true; this.label1.Location = new System.Drawing.Point(91, 62); this.label1.Name = "label1"; this.label1.Size = new System.Drawing.Size(47, 12); this.label1.TabIndex = 1; this.label1.Text = "方法1："; // // label2 // this.label2.AutoSize = true; this.label2.Location = new System.Drawing.Point(91, 132); this.label2.Name = "label2"; this.label2.Size = new System.Drawing.Size(47, 12); this.label2.TabIndex = 1; this.label2.Text = "方法2："; // // lblMsg // this.lblMsg.AutoSize = true; this.lblMsg.BackColor = System.Drawing.Color.Transparent; this.lblMsg.Font = new System.Drawing.Font("宋体", 16F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134))); this.lblMsg.ForeColor = System.Drawing.Color.Tomato; this.lblMsg.Location = new System.Drawing.Point(352, 26); this.lblMsg.Name = "lblMsg"; this.lblMsg.Size = new System.Drawing.Size(65, 22); this.lblMsg.TabIndex = 1; this.lblMsg.Text = "-----"; // // Form1 // this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F); this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font; this.ClientSize = new System.Drawing.Size(510, 254); this.Controls.Add(this.lblMsg); this.Controls.Add(this.label2); this.Controls.Add(this.label1); this.Controls.Add(this.button2); this.Controls.Add(this.btnOperate); this.Controls.Add(this.button1); this.Name = "Form1"; this.Text = "Form1"; this.Load += new System.EventHandler(this.Form1_Load); this.ResumeLayout(false); this.PerformLayout(); } #endregion private System.Windows.Forms.Button button1; private System.Windows.Forms.Button btnOperate; private System.Windows.Forms.Button button2; private System.Windows.Forms.Label label1; private System.Windows.Forms.Label label2; private System.Windows.Forms.Label lblMsg; } }