C#實現一個功能簡單的web瀏覽器

為相應的控制項添加相應的事件響應代碼，完整代碼如下：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.IO;
namespace Web瀏覽器
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void Navigate(string address)
{
if (String.IsNullOrEmpty(address))
return;
if (address.Equals("about:blank")) return;
if (!address.StartsWith("http://")) address = "http://" + address;
try {
Cursor.Current = Cursors.WaitCursor;
webBrowser1.Navigate(new Uri(address));
}
catch (System.UriFormatException)
{ return; }
finally { Cursor.Current = Cursors.Default; }
}
private void Form1_Load(object sender, EventArgs e)
{
toolStrip1.ImageList = imageList1;
tbBack.ImageIndex = 0;
tbForward.ImageIndex = 1;
tbRefrash.ImageIndex = 2;
tbHome.ImageIndex = 3;
}
private void comboBox1_KeyDown(object sender, KeyEventArgs e)
{ if (e.KeyCode == Keys.Enter) {
Navigate(comboBox1.Text);
comboBox1.Items.Add(comboBox1.Text);
}
}
private void tbBack_Click(object sender, EventArgs e)
{
webBrowser1.GoBack();
}
private void tbForward_Click(object sender, EventArgs e)
{
　　webBrowser1.GoForward();
}
private void tbRefrash_Click(object sender, EventArgs e)
{
i　f (!webBrowser1.Url.Equals("about:blank"))
　 {
webBrowser1.Refresh();
}
}
private void tbHome_Click(object sender, EventArgs e)
{
webBrowser1.GoHome();
}
private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
{
Navigate(comboBox1.Text);
}
private void 開啟ToolStripMenuItem_Click(object sender, EventArgs e)
{
　openFileDialog1.ShowDialog();
　webBrowser1.DocumentText = File.ReadAllText(openFileDialog1.FileName,Encoding.GetEncodin("gb2312"));
}
private void 關閉ToolStripMenuItem_Click(object sender, EventArgs e)
{
　 this.Close();
}
private void Form1_Resize(object sender, EventArgs e)
{
　 webBrowser1.Width = this.Width - 25;
　 webBrowser1.Height = this.Height - 130;
　comboBox1.Width = this.Width - 55;
}
private void toolStripButton1_Click(object sender, EventArgs e)
{
　 webBrowser1.GoSearch();
}
}
}

（3）程式說明：本程式只是實現一個功能簡單的wen瀏覽器效果，功能強大的wen瀏覽器，正在製作中，目的給初學者一個，開山引水的作用。