TextBox的KeyDown事件没有触发，TextBox所在Form设置了AcceptButton, 敲‘回车’键，

changjiangyang 2018-03-16 09:32:05

用VS2015新建一个Winform项目，Form里添加一个Button 和一个TextBox，设置Button的Click事件和TextBox的keyDown事件，把Form的AcceptButton设置成刚才添加的Button，运行程序，将光标定位在TextBox里，键盘上敲‘回车’键，Button的Click事件触发了，但是TextBox的KeyDown事件没有触发，为什么呢，在线急等高手。我把代码贴出来。
Form1.cs：

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;



namespace ProcessCharCMD

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }





        private void textBox1_KeyDown(object sender, KeyEventArgs e)

        {

            MessageBox.Show("TextBox KeyDwon");

        }



        private void button1_Click(object sender, EventArgs e)

        {

            MessageBox.Show("Button Click");

        }

    }

}

Form1.Desiger.cs:

namespace ProcessCharCMD

{

    partial class Form1

    {

        /// <summary>

        /// Required designer variable.

        /// </summary>

        private System.ComponentModel.IContainer components = null;



        /// <summary>

        /// Clean up any resources being used.

        /// </summary>

        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>

        protected override void Dispose(bool disposing)

        {

            if (disposing && (components != null))

            {

                components.Dispose();

            }

            base.Dispose(disposing);

        }



        #region Windows Form Designer generated code



        /// <summary>

        /// Required method for Designer support - do not modify

        /// the contents of this method with the code editor.

        /// </summary>

        private void InitializeComponent()

        {

            this.textBox1 = new System.Windows.Forms.TextBox();

            this.button1 = new System.Windows.Forms.Button();

            this.SuspendLayout();

            // 

            // textBox1

            // 

            this.textBox1.Location = new System.Drawing.Point(74, 42);

            this.textBox1.Name = "textBox1";

            this.textBox1.Size = new System.Drawing.Size(100, 20);

            this.textBox1.TabIndex = 0;

            this.textBox1.KeyDown += new System.Windows.Forms.KeyEventHandler(this.textBox1_KeyDown);

            // 

            // button1

            // 

            this.button1.Location = new System.Drawing.Point(197, 42);

            this.button1.Name = "button1";

            this.button1.Size = new System.Drawing.Size(75, 23);

            this.button1.TabIndex = 1;

            this.button1.Text = "button1";

            this.button1.UseVisualStyleBackColor = true;

            this.button1.Click += new System.EventHandler(this.button1_Click);

            // 

            // Form1

            // 

            this.AcceptButton = this.button1;

            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);

            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;

            this.ClientSize = new System.Drawing.Size(284, 262);

            this.Controls.Add(this.button1);

            this.Controls.Add(this.textBox1);

            this.Name = "Form1";

            this.Text = "Form1";

            this.ResumeLayout(false);

            this.PerformLayout();



        }



        #endregion



        private System.Windows.Forms.TextBox textBox1;

        private System.Windows.Forms.Button button1;

    }

}