分类: C/C++
2007-07-17 09:53:41
当前浏览器的"另存为","打印","打印御览","页面设置",刷新,前进,后退等等。几乎都是控件封装好了的,没有几句代码。
浏览器的分页功能。当浏览器有NewWindow激发时产生新的一页。主要依靠NewWindow事件。
当前页面的状态。例如标题,状态栏等。
实现过程以及关键点
新建一个vs2005的windows applaction项目
界面
一个MenuStrip实现最上面的菜单。
两个ToolStrip分别是工具栏和地址栏。
一个TabControl也就是浏览器的主体了,它的每个TabPage就是每一个分页了。
一个StatusStrip也就是状态栏了。
另外为了使窗体大小变化时控件也随着变化注意使用控件的dock属性。
搭成如下界面:
顺便说一句和vs2003不同的是vs2005把例如 菜单栏
this.toolStripMenuItem1 = new System.Windows.Forms.ToolStripMenuItem();
this.saveasToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
this.toolStripSeparator1 = new System.Windows.Forms.ToolStripSeparator();
this.printToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
this.printPreToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
this.toolStripSeparator2 = new System.Windows.Forms.ToolStripSeparator();
this.exitToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
这些通过我们拖拽控件,系统生成的界面代码分离出来统一放在叫*.Designer.cs文件里了,详见事例代码中的Form1.Designer.cs文件。
辅助方法
#region //辅助方法
/// <summary>
/// 当在浏览器地址栏敲"回车"时当前浏览器重定向到指定url(tscbUrl.Tex)
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void tscbUrl_KeyDown(object sender, KeyEventArgs e)
{
if (e.KeyCode == Keys.Enter)
{
newCurrentPageUrl(tscbUrl.Text);
}
}
/// <summary>
/// 新建空白页
/// </summary>
private void newPage()
{
tscbUrl.Text = "about:blank";
TabPage mypage = new TabPage();
WebBrowser tempBrowser = new WebBrowser();
tempBrowser.Navigated += new WebBrowserNavigatedEventHandler(tempBrowser_Navigated);
tempBrowser.NewWindow += new CancelEventHandler(tempBrowser_NewWindow);
tempBrowser.ProgressChanged += new WebBrowserProgressChangedEventHandler(tempBrowser_ProgressChanged);
tempBrowser.StatusTextChanged += new EventHandler(tempBrowser_StatusTextChanged);
tempBrowser.Dock = DockStyle.Fill;
mypage.Controls.Add(tempBrowser);
tabControl1.TabPages.Add(mypage);
tabControl1.SelectedTab = mypage;
}
/// <summary>
/// 临时浏览器进度变化事件
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
void tempBrowser_ProgressChanged(object sender, WebBrowserProgressChangedEventArgs e)
{
toolStripProgressBar1.Maximum = (int)e.MaximumProgress;
toolStripProgressBar1.Value = (int)e.CurrentProgress;
}
/// <summary>
/// 新建一页并定向到指定url
/// </summary>
/// <param name="address">新一页的浏览器重新定向到的url</param>
private void newPage(string address)
{
TabPage mypage = new TabPage();
WebBrowser tempBrowser = new WebBrowser();
tempBrowser.Navigated += new WebBrowserNavigatedEventHandler(tempBrowser_Navigated);
tempBrowser.NewWindow += new CancelEventHandler(tempBrowser_NewWindow);
tempBrowser.StatusTextChanged += new EventHandler(tempBrowser_StatusTextChanged);
tempBrowser.ProgressChanged += new WebBrowserProgressChangedEventHandler(tempBrowser_ProgressChanged);
tempBrowser.Url = getUrl(address);
tempBrowser.Dock = DockStyle.Fill;
mypage.Controls.Add(tempBrowser);
tabControl1.TabPages.Add(mypage);
}
/// <summary>
/// 获取当前浏览器
/// </summary>
/// <returns>当前浏览器</returns>
private WebBrowser getCurrentBrowser()
{
WebBrowser currentBrowser = (WebBrowser)tabControl1.SelectedTab.Controls[0];
return currentBrowser;
}
/// <summary>
/// 处理字符串为合法url
/// </summary>
/// <param name="address"></param>
/// <returns></returns>
private Uri getUrl(string address)
{
string tempaddress = address;
if ((!address.StartsWith("http://")) && (!address.StartsWith("https://")) && (!address.StartsWith("ftp://")))
{
tempaddress = "http://" + address;
}
Uri myurl;
try
{
myurl = new Uri(tempaddress);
}
catch
{
myurl = new Uri("about:blank");
}
return myurl;
}
/// <summary>
/// 截取字符串为指定长度
/// </summary>
/// <param name="oldstring"></param>
/// <returns></returns>
private string newstring(string oldstring)
{
string temp;
if (oldstring.Length < TITLE_COUNT)
{
temp = oldstring;
}
else
{
temp = oldstring.Substring(0, TITLE_COUNT);
}
return temp;
}
/// <summary>
/// 设置"前进","后退"button的可用状态
/// </summary>
private void setStatusButton()
{
backButton.Enabled = getCurrentBrowser().CanGoBack;
forwordButton.Enabled = getCurrentBrowser().CanGoForward;
}
#endregion
说明:其中getCurrentBrowser()是获取当前页面的浏览器,这里把它叫当前浏览器,即getCurrentBrowser()为获取当前浏览器。
#region//菜单栏
/// <summary>
/// 另存为
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void saveasToolStripMenuItem_Click(object sender, EventArgs e)
{
getCurrentBrowser().ShowSaveAsDialog();
}
/// <summary>
/// 打印
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void printToolStripMenuItem_Click(object sender, EventArgs e)
{
getCurrentBrowser().ShowPrintDialog();
}
/// <summary>
/// 打印御览
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void printPreToolStripMenuItem_Click(object sender, EventArgs e)
{
getCurrentBrowser().ShowPrintPreviewDialog();
}
/// <summary>
/// 关闭浏览器
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void exitToolStripMenuItem_Click(object sender, EventArgs e)
{
Application.Exit();
}
/// <summary>
/// 页面设置
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void pageSetupToolStripMenuItem_Click(object sender, EventArgs e)
{
getCurrentBrowser().ShowPageSetupDialog();
}
/// <summary>
/// 属性设置
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void propeToolStripMenuItem_Click(object sender, EventArgs e)
{
getCurrentBrowser().ShowPropertiesDialog();
}
#region//关于
private void aboutToolStripMenuItem_Click(object sender, EventArgs e)
{
AboutBox1 myabout = new AboutBox1();
myabout.Show();
}
private void tipToolStripMenuItem_Click(object sender, EventArgs e)
{
MessageBox.Show("小提示:双击分页标题即可关闭当前页面。");
}
#endregion
#endregion
说明:其中文件菜单的功能大都是WebBrowser控件封装好的仅仅是用上文提到的getCurrentBrowser()获取一下当前浏览器罢了。
工具栏
#region//工具栏
/// <summary>
/// 后退
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void backButton_Click(object sender, EventArgs e)
{
getCurrentBrowser().GoBack();
setStatusButton();
}
/// <summary>
/// 前进
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void forwordButton_Click(object sender, EventArgs e)
{
getCurrentBrowser().GoForward();
setStatusButton();
}
/// <summary>
/// 停止
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void stopButton_Click(object sender, EventArgs e)
{
getCurrentBrowser().Stop();
}
/// <summary>
/// 刷新
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void refreshButton_Click(object sender, EventArgs e)
{
getCurrentBrowser().Refresh();
}
/// <summary>
/// 定向到主页
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void homeButton_Click(object sender, EventArgs e)
{
getCurrentBrowser().GoHome();
}
/// <summary>
/// 搜索
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void searchButton_Click(object sender, EventArgs e)
{
getCurrentBrowser().GoSearch();
}
/// <summary>
/// 打印
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void printButton_Click(object sender, EventArgs e)
{
getCurrentBrowser().Print();
}
/// <summary>
/// 新建空白页
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void newButton_Click(object sender, EventArgs e)
{
newPage();
}
/// <summary>
/// 使当前的浏览器定位到给定url
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void gotoButton_Click(object sender, EventArgs e)
{
newCurrentPageUrl(tscbUrl.Text);
}
#endregion
说明:和菜单栏实现的功能类似,也是一些简单的调用,仅仅是表现形式不同。
初始化
#region//初始化 /// <summary> /// 初始化 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void Form1_Load(object sender, EventArgs e) { initMainForm(); } /// <summary> /// 初始化浏览器 /// </summary> private void initMainForm() { TabPage mypage = new TabPage(); WebBrowser tempBrowser = new WebBrowser(); tempBrowser.Navigated += new WebBrowserNavigatedEventHandler(tempBrowser_Navigated); tempBrowser.NewWindow += new CancelEventHandler(tempBrowser_NewWindow); tempBrowser.StatusTextChanged += new EventHandler(tempBrowser_StatusTextChanged); tempBrowser.ProgressChanged += new WebBrowserProgressChangedEventHandler(tempBrowser_ProgressChanged); tempBrowser.Dock = DockStyle.Fill; tempBrowser.GoHome();//和新建空白页不同 mypage.Controls.Add(tempBrowser); tabControl1.TabPages.Add(mypage); } #endregion |
#region//临时浏览器事件 /// <summary> /// 临时浏览器状态变化事件 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> void tempBrowser_StatusTextChanged(object sender, EventArgs e) { WebBrowser myBrowser = (WebBrowser)sender; if (myBrowser != getCurrentBrowser()) { return; } else { toolStripStatusLabel1.Text = myBrowser.StatusText; } } /// <summary> /// 在当前页面上重新定向 /// </summary> /// <param name="address">url</param> private void newCurrentPageUrl(String address) { getCurrentBrowser().Navigate(getUrl(address)); } /// <summary> /// 临时浏览器产生新窗体事件 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> void tempBrowser_NewWindow(object sender, CancelEventArgs e) { //获取触发tempBrowser_NewWindow事件的浏览器 WebBrowser myBrowser = (WebBrowser)sender; //获取触发tempBrowser_NewWindow事件的浏览器所在TabPage TabPage mypage = (TabPage)myBrowser.Parent; //通过StatusText属性获得新的url string NewURL = ((WebBrowser)sender).StatusText; //生成新的一页 TabPage TabPageTemp = new TabPage(); //生成新的tempBrowser WebBrowser tempBrowser = new WebBrowser(); //临时浏览器定向到新的url tempBrowser.Navigate(NewURL); tempBrowser.Dock = DockStyle.Fill; //为临时浏览器关联NewWindow等事件 tempBrowser.NewWindow += new CancelEventHandler(tempBrowser_NewWindow); tempBrowser.Navigated += new WebBrowserNavigatedEventHandler(tempBrowser_Navigated); tempBrowser.ProgressChanged += new WebBrowserProgressChangedEventHandler(tempBrowser_ProgressChanged); tempBrowser.StatusTextChanged+=new EventHandler(tempBrowser_StatusTextChanged); //将临时浏览器添加到临时TabPage中 TabPageTemp.Controls.Add(tempBrowser); //将临时TabPage添加到主窗体中 this.tabControl1.TabPages.Add(TabPageTemp); //使外部无法捕获此事件 e.Cancel = true; } /// <summary> /// 临时浏览器定向完毕 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void tempBrowser_Navigated(object sender, WebBrowserNavigatedEventArgs e) { tscbUrl.Text = getCurrentBrowser().Url.ToString(); WebBrowser mybrowser = (WebBrowser)sender; TabPage mypage=(TabPage)mybrowser.Parent; //设置临时浏览器所在tab标题 mypage.Text= newstring(mybrowser.DocumentTitle); } #endregion |
#region//tabControl1事件 /// <summary> /// 切换tab /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void tabControl1_SelectedIndexChanged(object sender, EventArgs e) { WebBrowser mybor = (WebBrowser)tabControl1.SelectedTab.Controls[0]; if (mybor.Url != null) { //地址输入框 tscbUrl.Text = mybor.Url.ToString(); tabControl1.SelectedTab.Text = newstring(mybor.DocumentTitle); } else { tscbUrl.Text = "about:blank"; tabControl1.SelectedTab.Text = "空白页"; } setStatusButton(); } /// <summary> /// 关闭当前tab /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void tabControl1_DoubleClick(object sender, EventArgs e) { //仅仅剩下一个tab时返回 if (tabControl1.TabPages.Count <= 1) { tabControl1.SelectedTab.Text = "空白页"; getCurrentBrowser().Navigate("about:blank"); } else { //先将tabControl1隐藏然后remove掉目标tab(如果不隐藏则出现闪烁,即系统自动调转到tabControl1的第一个tab然后跳会。)最后显示tabControl1。 tabControl1.Visible = false; WebBrowser mybor = getCurrentBrowser(); //释放资源 mybor.Dispose(); mybor.Controls.Clear(); this.tabControl1.TabPages.Remove(this.tabControl1.SelectedTab); //重新设置当前tab tabControl1.SelectedTab = tabControl1.TabPages[tabControl1.TabPages.Count - 1]; tabControl1.Visible = true; } } #endregion |