C#键控事件不起作用

我试图让应用程序在按下ENTER键后导航到web浏览器组件中的某个URL（条形码阅读器将数据输入条形码文本框，并编程为在每次扫描结束时添加“ENTER”）。然后，条形码编号通过URL发送到服务器进行验证，结果显示在web浏览器中

在阅读了关于堆栈溢出的内容后，我得出结论，没有设置

this.KeyPreview

，但是即使将其设置为True，也不会设置

我希望它所要做的就是，当在Form2上的任意位置按ENTER键时，它应该将

WebBrowser

组件URL更改为

条形码

文本框中包含的数据

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 SUBWAY_deliverX_2017_POSlink
{
    public partial class Form2 : Form
    {
        public Form2()
        {
            InitializeComponent();
            this.ActiveControl = Barcode;
        }

        private void Form2_Load(object sender, EventArgs e)
        {

        }

        private void button1_Click(object sender, EventArgs e)
        {
            Close();
        }

        private void button2_Click(object sender, EventArgs e)
        {

        }

        private void Barcode_TextChanged(object sender, EventArgs e)
        {

        }

        private void Barcode_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.Enter)
            {
                webBrowser1.Navigate("https://10.0.0.142/deliverXPOSquery.php?barcode=" + Barcode.Text);
            }
        }
    }
}

和设计器文件：

namespace SUBWAY_deliverX_2017_POSlink
{
    partial class Form2
    {
        /// <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()
        {
            System.ComponentModel.ComponentResourceManager resources = new System.ComponentModel.ComponentResourceManager(typeof(Form2));
            this.button1 = new System.Windows.Forms.Button();
            this.Barcode = new System.Windows.Forms.TextBox();
            this.pictureBox1 = new System.Windows.Forms.PictureBox();
            this.webBrowser1 = new System.Windows.Forms.WebBrowser();
            this.button2 = new System.Windows.Forms.Button();
            ((System.ComponentModel.ISupportInitialize)(this.pictureBox1)).BeginInit();
            this.SuspendLayout();
            // 
            // button1
            // 
            this.button1.Font = new System.Drawing.Font("Microsoft Sans Serif", 15.75F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
            this.button1.Location = new System.Drawing.Point(177, 241);
            this.button1.Name = "button1";
            this.button1.Size = new System.Drawing.Size(249, 79);
            this.button1.TabIndex = 0;
            this.button1.Text = "Return to SubShop";
            this.button1.UseVisualStyleBackColor = true;
            this.button1.Click += new System.EventHandler(this.button1_Click);
            // 
            // Barcode
            // 
            this.Barcode.BackColor = System.Drawing.SystemColors.Control;
            this.Barcode.BorderStyle = System.Windows.Forms.BorderStyle.None;
            this.Barcode.Font = new System.Drawing.Font("Microsoft Sans Serif", 15.75F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
            this.Barcode.Location = new System.Drawing.Point(178, 323);
            this.Barcode.Name = "Barcode";
            this.Barcode.Size = new System.Drawing.Size(249, 24);
            this.Barcode.TabIndex = 1;
            this.Barcode.TextChanged += new System.EventHandler(this.Barcode_TextChanged);
            // 
            // pictureBox1
            // 
            this.pictureBox1.Image = global::SUBWAY_deliverX_2017_POSlink.Properties.Resources.delxstoreheader;
            this.pictureBox1.Location = new System.Drawing.Point(0, -2);
            this.pictureBox1.Name = "pictureBox1";
            this.pictureBox1.Size = new System.Drawing.Size(589, 102);
            this.pictureBox1.TabIndex = 3;
            this.pictureBox1.TabStop = false;
            // 
            // webBrowser1
            // 
            this.webBrowser1.Location = new System.Drawing.Point(12, 106);
            this.webBrowser1.MinimumSize = new System.Drawing.Size(20, 20);
            this.webBrowser1.Name = "webBrowser1";
            this.webBrowser1.Size = new System.Drawing.Size(563, 120);
            this.webBrowser1.TabIndex = 4;
            this.webBrowser1.Url = new System.Uri("https://10.0.0.142/deliverXPOSquery.php", System.UriKind.Absolute);
            // 
            // button2
            // 
            this.button2.Location = new System.Drawing.Point(471, 256);
            this.button2.Name = "button2";
            this.button2.Size = new System.Drawing.Size(75, 23);
            this.button2.TabIndex = 5;
            this.button2.Text = "button2";
            this.button2.UseVisualStyleBackColor = true;
            this.button2.Click += new System.EventHandler(this.button2_Click);
            // 
            // Form2
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(587, 346);
            this.ControlBox = false;
            this.KeyPreview = true;
            this.Controls.Add(this.button2);
            this.Controls.Add(this.webBrowser1);
            this.Controls.Add(this.pictureBox1);
            this.Controls.Add(this.Barcode);
            this.Controls.Add(this.button1);
            this.Icon = ((System.Drawing.Icon)(resources.GetObject("$this.Icon")));
            this.MaximumSize = new System.Drawing.Size(603, 385);
            this.MinimumSize = new System.Drawing.Size(603, 385);
            this.Name = "Form2";
            this.SizeGripStyle = System.Windows.Forms.SizeGripStyle.Hide;
            this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
            this.Text = "deliverX 2017 - Order Validation";
            this.TopMost = true;
            this.Load += new System.EventHandler(this.Form2_Load);
            ((System.ComponentModel.ISupportInitialize)(this.pictureBox1)).EndInit();
            this.ResumeLayout(false);
            this.PerformLayout();

        }

        #endregion

        private System.Windows.Forms.Button button1;
        private System.Windows.Forms.TextBox Barcode;
        private System.Windows.Forms.PictureBox pictureBox1;
        private System.Windows.Forms.WebBrowser webBrowser1;
        private System.Windows.Forms.Button button2;
    }
}

namespace SUBWAY\u deliverX\u 2017\u POSlink
{
部分类别表格2
{
/// 
///必需的设计器变量。
/// 
private System.ComponentModel.IContainer components=null；
/// 
///清理所有正在使用的资源。
/// 
///如果应释放托管资源，则为true；否则为false。
受保护的覆盖无效处置（布尔处置）
{
if（处理和（组件！=null））
{
组件。Dispose（）；
}
基地。处置（处置）；
}
#区域Windows窗体设计器生成的代码
/// 
///设计器支持所需的方法-不修改
///此方法的内容与代码编辑器一起使用。
/// 
私有void InitializeComponent（）
{
System.ComponentModel.ComponentResourceManager资源=新的System.ComponentModel.ComponentResourceManager（typeof（Form2））；
this.button1=new System.Windows.Forms.Button（）；
this.Barcode=new System.Windows.Forms.TextBox（）；
this.pictureBox1=新系统.Windows.Forms.PictureBox（）；
this.webBrowser1=new System.Windows.Forms.WebBrowser（）；
this.button2=new System.Windows.Forms.Button（）；
（（System.ComponentModel.ISupportInitialize）（this.pictureBox1））.BeginInit（）；
这个.SuspendLayout（）；
// 
//按钮1
// 
this.button1.Font=new System.Drawing.Font（“Microsoft Sans Serif”，15.75F，System.Drawing.FontStyle.Regular，System.Drawing.GraphicsUnit.Point，（（字节）（0）））；
this.button1.Location=新系统图纸点（177241）；
this.button1.Name=“button1”；
this.button1.Size=新系统图纸尺寸（249,79）；
this.button1.TabIndex=0；
this.button1.Text=“返回子商店”；
this.button1.UseVisualStyleBackColor=true；
this.button1.Click+=新系统.EventHandler（this.button1\u Click）；
// 
//条形码
// 
this.Barcode.BackColor=System.Drawing.SystemColors.Control；
this.Barcode.BorderStyle=System.Windows.Forms.BorderStyle.None；
this.Barcode.Font=new System.Drawing.Font（“Microsoft Sans Serif”，15.75F，System.Drawing.FontStyle.Regular，System.Drawing.GraphicsUnit.Point，（（字节）（0）））；
this.Barcode.Location=新系统图点（178323）；
this.Barcode.Name=“Barcode”；
this.Barcode.Size=新系统.图纸.尺寸（249,24）；
this.Barcode.TabIndex=1；
this.Barcode.TextChanged+=新系统.EventHandler（this.Barcode\u TextChanged）；
// 
//pictureBox1
// 
this.pictureBox1.Image=global:：SUBWAY_deliverX_2017_POSlink.Properties.Resources.delxstoreheader；
this.pictureBox1.Location=新系统图点（0，-2）；
this.pictureBox1.Name=“pictureBox1”；
this.pictureBox1.Size=新系统图纸尺寸（589102）；
this.pictureBox1.TabIndex=3；
this.pictureBox1.TabStop=false；
// 
//webBrowser1
// 
this.webBrowser1.Location=新系统.图纸.点（12，106）；
this.webBrowser1.MinimumSize=新系统图纸尺寸（20,20）；
this.webBrowser1.Name=“webBrowser1”；
this.webBrowser1.Size=新系统.Drawing.Size（563120）；
this.webBrowser1.TabIndex=4；
this.webBrowser1.Url=new System.Uri（“https://10.0.0.142/deliverXPOSquery.php“，System.UriKind.Absolute）；
// 
//按钮2
// 
this.button2.Location=新系统.图纸.点（471，256）；
this.button2.Name=“button2”；
this.button2.Size=新系统图纸尺寸（75,23）；
this.button2.TabIndex=5；
this.button2.Text=“button2”；
this.button2.UseVisualStyleBackColor=true；
this.button2.Click+=新系统.EventHandler（this.button2\u Click）；
// 
//表格2
// 
此.AutoScaleDimensions=新系统.Drawing.SizeF（6F，13F）；
this.AutoScaleMode=System.Windows.Forms.AutoScaleMode.Font；
this.ClientSize=新系统.Drawing.Size（587346）；
this.ControlBox=false；
this.KeyPreview=true；
this.Controls.Add（this.button2）；
this.Controls.Add（this.webBrowser1）；
this.Controls.Add（this.pictureBox1）；
本.控件.添加（本.条形码）；
this.Controls.Add（this.button1）；
this.Icon=（（System.Drawing.Icon）（resources.GetObject（$this.Icon））；
this.MaximumSize=新系统图纸尺寸（603385）；
此最小尺寸=新系统图纸尺寸（603385）；
this.Name=“Form2”；
this.SizeGripStyle=System.Windows.Forms.SizeGripStyle.Hide；
this.StartPosition=System.Windows.Forms.FormStartPosition.CenterScreen；
this.Text=“deliverX 2017-订单
 this.Barcode.BackColor = System.Drawing.SystemColors.Control;
            this.Barcode.BorderStyle = System.Windows.Forms.BorderStyle.None;
            this.Barcode.Font = new System.Drawing.Font("Microsoft Sans Serif", 15.75F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
            this.Barcode.Location = new System.Drawing.Point(178, 323);
            this.Barcode.Name = "Barcode";
            this.Barcode.Size = new System.Drawing.Size(249, 24);
            this.Barcode.TabIndex = 1;
            this.Barcode.TextChanged += new System.EventHandler(this.Barcode_TextChanged);