c# - 为什么我无法访问 System.EventArgs 的 KeyCode 成员？

Question

我做错了什么？这是我得到的错误代码:

'System.EventArgs' does not contain a definition for 'KeyCode' and no extension method 'KeyCode' accepting a first argument of type 'System.EventArgs' could be found (are you missing a using directive or an assembly reference?)

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 BroZer
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Reload_Click(object sender, EventArgs e)
        {
            webBrowser1.Refresh();
        }

        private void Go_Click(object sender, EventArgs e)
        {
            webBrowser1.Navigate(textBox1.Text);
        }

        private void Back_Click(object sender, EventArgs e)
        {
            webBrowser1.GoBack();
        }

        private void Forward_Click(object sender, EventArgs e)
        {
            webBrowser1.GoForward();
        }

        private void textBox1_KeyDown(object sender, EventArgs e)
        {
            if (e.KeyCode == Keys.Enter)
            {
                webBrowser1.Navigate("https://www.google.com/search?&ie=UTF-8&q=" + textBox1.Text);
            }
        }

        private void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
        {

        }

        private void Save_Click(object sender, EventArgs e)
        {
            webBrowser1.ShowSaveAsDialog();
        }

        private void Print_Click(object sender, EventArgs e)
        {
            webBrowser1.ShowPrintPreviewDialog();
        }
    }
}

Answer 1

更新:我想通了。你所要做的就是改变

(object sender, EventArgs e)

到

(object sender, KeyEventArgs e)