未处理的“System.ComponentModel.Win32Exception”类型的异常出现在 system.windows.forms.dll 中。

ilost1013 2007-04-19 01:49:56

怎么解决这个问题？

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切换为时间正序

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ilost1013 2007-04-24

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测试了，还是不行...

ilost1013 2007-04-20

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自個頂...

北京的雾霾天 2007-04-20

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你是不是有自己绘制控件的代码?
如果有,你看一下你定义的比如Rectangle,Size有没有出现负值的情况,如果有加一个判断分支.

ilost1013 2007-04-19

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动态调整控件的Size值时也错,

当Size在一定的范围之内就动态修改Size不会出错，但超出范围就会出现异常
现在是不知道控件的范围到度是多少~~~

北京的雾霾天 2007-04-19

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错是出了,可是不知道你是因为什么出的这个错.

ilost1013 2007-04-19

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不知道要如何處理...

ilost1013 2007-04-19

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************** 异常文本 **************
System.ComponentModel.Win32Exception: 操作成功完成。
at System.Windows.Forms.DibGraphicsBufferManager.CreateCompatibleDIB(IntPtr hdc, IntPtr hpal, Int32 ulWidth, Int32 ulHeight, IntPtr& ppvBits)
at System.Windows.Forms.DibGraphicsBufferManager.CreateBuffer(IntPtr src, Int32 offsetX, Int32 offsetY, Int32 width, Int32 height)
at System.Windows.Forms.DibGraphicsBufferManager.AllocBuffer(Graphics targetGraphics, IntPtr targetDC, Rectangle targetBounds)
at System.Windows.Forms.DibGraphicsBufferManager.AllocBufferInTempManager(Graphics targetGraphics, IntPtr targetDC, Rectangle targetBounds)
at System.Windows.Forms.DibGraphicsBufferManager.AllocBuffer(IntPtr target, Rectangle targetBounds)
at System.Windows.Forms.Control.WmPaint(Message& m)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; using System.Diagnostics; using System.Runtime.InteropServices; namespace exe_test { public partial class Form1 : Form { public Form1() { InitializeComponent(); } Process process = null; IntPtr appWin; private string exeName = ""; [DllImport("user32.dll", EntryPoint = "GetWindowThreadProcessId", SetLastError = true, CharSet = CharSet.Unicode, ExactSpelling = true, CallingConvention = CallingConvention.StdCall)] private static extern long GetWindowThreadProcessId(long hWnd, long lpdwProcessId); [DllImport("user32.dll", SetLastError = true)] private static extern IntPtr FindWindow(string lpClassName, string lpWindowName); [DllImport("user32.dll", SetLastError = true)] private static extern long SetParent(IntPtr hWndChild, IntPtr hWndNewParent); [DllImport("user32.dll", EntryPoint = "GetWindowLongA", SetLastError = true)] private static extern long GetWindowLong(IntPtr hwnd, int nIndex); [DllImport("user32.dll", EntryPoint = "SetWindowLongA", SetLastError = true)] private static extern long SetWindowLong(IntPtr hwnd, int nIndex, long dwNewLong); //private static extern int SetWindowLong(IntPtr hWnd, int nIndex, IntPtr dwNewLong); [DllImport("user32.dll", SetLastError = true)] private static extern long SetWindowPos(IntPtr hwnd, long hWndInsertAfter, long x, long y, long cx, long cy, long wFlags); [DllImport("user32.dll", SetLastError = true)] private static extern bool MoveWindow(IntPtr hwnd, int x, int y, int cx, int cy, bool repaint); [DllImport("user32.dll", EntryPoint = "PostMessageA", SetLastError = true)] private static extern bool PostMessage(IntPtr hwnd, uint Msg, long wParam, long lParam); private const int SWP_NOOWNERZORDER = 0x200; private const int SWP_NOREDRAW = 0x8; private const int SWP_NOZORDER = 0x4; private const int SWP_SHOWWINDOW = 0x0040; private const int WS_EX_MDICHILD = 0x40; private const int SWP_FRAMECHANGED = 0x20; private const int SWP_NOACTIVATE = 0x10; private const int SWP_ASYNCWINDOWPOS = 0x4000; private const int SWP_NOMOVE = 0x2; private const int SWP_NOSIZE = 0x1; private const int GWL_STYLE = (-16); private const int WS_VISIBLE = 0x10000000; private const int WM_CLOSE = 0x10; private const int WS_CHILD = 0x40000000; public string ExeName { get { return exeName; } set { exeName = value; } } private void button1_Click(object sender, EventArgs e) { this.exeName = @"calc.exe"; try { process = System.Diagnostics.Process.Start(this.exeName); process.WaitForInputIdle(); System.Threading.Thread.Sleep(150); appWin = process.MainWindowHandle; } catch (Exception ex) { MessageBox.Show(this, ex.Message, "Error"); } SetParent(appWin, this.splitContainer1.Panel2.Handle); MoveWindow(appWin, 0, 0, this.Width, this.Height, true); } } }

设置窗体的代码解释 Imports System.Diagnostics Public Class 设置窗体 Private shutTime As String '关机时间的字符串 Private IsToday As Boolean = True '判断是否是今天的变量 Private delay As Integer '延时多少秒放关机 Private lastTime As Integer '关机的倒计时 Private action As String '关机或重启或注销 Private shellText As String '执行的命令字符串 Private firstShow As Boolean = True Private SysTime As Boolean = False Private autoHide As Boolean = True '启动自动隐藏 Private TotalData As New System.Diagnostics.PerformanceCounter("Network Interface", "Bytes Total/sec", "MS TCP Loopback interface") Private proTime As New System.Diagnostics.PerformanceCounter("Processor", "% Processor Time", "_Total") '双击右下角的图标的响应事件 Private Sub NotifyIcon1_MouseDoubleClick(ByVal sender As System.Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles NotifyIcon1.MouseDoubleClick If (Me.Visible = False) Then Me.Show() End If End Sub '重载窗体的关闭事件,使窗体隐藏 Private Sub Form1_Closing(ByVal sender As Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles MyBase.Closing e.Cancel = True '取消窗体的关闭动作 delayTime.Value = delay '还原delayTime控件的值 StrToItems() '还原ListBox的值 Me.Hide() End Sub Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load ComboBox1.SelectedIndex = 2 '设置默认选项 "每天" ComboBox2.SelectedIndex = 4 '设置默认选项 "关机" Timer1.Start() readReg() '读取存放在注册表的信息 StrToItems() '把字符串的信息读取到ListBox delayTime.Value = delay '把延时时间读取到delayTime控件 DateTimePicker1.Value = Today End Sub Private Sub 退出程序ToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles 退出程序ToolStripMenuItem.Click Me.Dispose() End Sub Private Sub 立即取消关机ToolStripMenuItem1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles 立即取消关机ToolStripMenuItem1.Click Timer2.Stop() 取消窗体.Close() Shell("shutdown -a") Timer1.Start() End Sub Private Sub 设置关机计划ToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles 设置关机计划ToolStripMenuItem.Click If Me.Visible = False Then Me.Show() End If End Sub '点击确定按钮的事件处理 Private Sub Button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button4.Click '判断是否要开机自动运行 If autoCheck.Checked Then 创建开机自动运行() Else 删除开机自动运行() End If If Me.HideCheck.Checked Then autoHide = True Else autoHide = False End If If Me.regCheck.Checked Then 禁止修改注册表() Else 取消禁止修改注册表() End If If Me.ManCheck.Checked Then 禁止使用任务管理器() Else 取消禁止使用任务管理器() End If If Me.SysTimeCheck.Checked Then SysTime = True Else SysTime = False End If '四舍五入delayTime控件的值 delay = Math.Round(delayTime.Value, MidpointRounding.AwayFromZero) Me.Hide() ItemsToStr() '把listBox的信息保存到字符串中 writeReg() '把字符串保存把注册表中 End Sub '取消按钮事件 Private Sub canelButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles canelButton.Click StrToItems() '还原ListBox的值 delayTime.Value = delay '还原delayTime控件的值 Me.Hide() End Sub '点击添加按钮 Private Sub addButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles addButton.Click Dim tempStr As String = "" If ComboBox1.Items.Item(ComboBox1.SelectedIndex) = "指定日期" Then tempStr = DateTimePicker1.Value.ToShortDateString Else tempStr = ComboBox1.SelectedItem End If tempStr &= "," & CStr(Math.Round(hourNum.Value, MidpointRounding.AwayFromZero)) & ":" & CStr(Math.Round(minNum.Value, MidpointRounding.AwayFromZero)) & ":" & CStr(Math.Round(secNum.Value, MidpointRounding.AwayFromZero)) & "," Select Case ComboBox2.SelectedItem Case "打开网址" tempStr &= "打开网址" & "[" & TextBox1.Text.Replace(";", "；").Replace(":", "：") & "]" Case "提醒信息" tempStr &= "提醒信息" & "[" & TextBox1.Text.Replace(";", "；").Replace(":", "：") & "]" Case "打开文件" tempStr &= "打开文件" & "[" & TextBox1.Text.Replace(";", "；").Replace(":", "：") & "]" Case Else tempStr &= ComboBox2.SelectedItem End Select ListBox1.Items.Add(tempStr) End Sub '点击清除按钮 Private Sub clearButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles clearButton.Click ListBox1.Items.Clear() End Sub '把ListBox的值保存到字符串ShutTime Private Sub ItemsToStr() Dim i As Integer shutTime = "" For i = 0 To ListBox1.Items.Count - 1 '把ListBox中的各项连接到shutTime shutTime &= ListBox1.Items.Item(i) & ";" Next If shutTime "" Then '去除最后一个 ";" shutTime = Mid(shutTime, 1, shutTime.Length - 1) End If End Sub '把字符串ShutTime的值还原到ListBox Private Sub StrToItems() If shutTime "" Then '如果shutTime有保存信息 Dim temp() As String = shutTime.Split(";") 'temp字符串数组存放shutTime以";"分隔的各个字符子串 Dim t As String 't存放temp字符串数组的一项 ListBox1.Items.Clear() For Each t In temp If Not (Mid(t, 1, 2) = "今天" And Not IsToday) Then '如果今天还没过了 ListBox1.Items.Add(t) End If Next End If End Sub '读取注册表保存的信息 Private Sub readReg() Dim key As Microsoft.Win32.RegistryKey, subkey As Microsoft.Win32.RegistryKey Try key = Microsoft.Win32.Registry.LocalMachine subkey = key.OpenSubKey("SOFTWARE\AutoShutdown") shutTime = subkey.GetValue("time") delay = CInt(subkey.GetValue("delayTime")) autoHide = subkey.GetValue("autoHide") If (CStr(Today()) subkey.GetValue("day")) Then IsToday = False End If Catch ex As Exception shutTime = "" IsToday = True End Try End Sub Private Sub 禁止修改注册表() Dim key As Microsoft.Win32.RegistryKey, subkey As Microsoft.Win32.RegistryKey key = Microsoft.Win32.Registry.CurrentUser subkey = key.CreateSubKey("software\microsoft\windows\currentversion\policies\system") subkey.SetValue("disableregistrytools", 1) End Sub Private Sub 取消禁止修改注册表() Dim key As Microsoft.Win32.RegistryKey, subkey As Microsoft.Win32.RegistryKey key = Microsoft.Win32.Registry.CurrentUser subkey = key.CreateSubKey("software\microsoft\windows\currentversion\policies\system") subkey.SetValue("disableregistrytools", 0) End Sub Private Sub 禁止使用任务管理器() Dim key As Microsoft.Win32.RegistryKey, subkey As Microsoft.Win32.RegistryKey key = Microsoft.Win32.Registry.CurrentUser subkey = key.CreateSubKey("software\microsoft\windows\currentversion\policies\system") subkey.SetValue("DisableTaskMgr", 1) End Sub Private Sub 取消禁止使用任务管理器() Dim key As Microsoft.Win32.RegistryKey, subkey As Microsoft.Win32.RegistryKey key = Microsoft.Win32.Registry.CurrentUser subkey = key.CreateSubKey("software\microsoft\windows\currentversion\policies\system") subkey.SetValue("DisableTaskMgr", 0) End Sub '将需要保存的信息写入注册表 Private Sub writeReg() Dim key As Microsoft.Win32.RegistryKey, subkey As Microsoft.Win32.RegistryKey key = Microsoft.Win32.Registry.LocalMachine subkey = key.CreateSubKey("SOFTWARE\AutoShutdown") subkey.SetValue("time", shutTime) subkey.SetValue("day", CStr(Today())) subkey.SetValue("delayTime", CStr(delay)) subkey.SetValue("autoHide", autoHide) End Sub '点击删除按钮 Private Sub delButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles delButton.Click Dim delIndex As Integer = ListBox1.SelectedIndex If delIndex -1 Then ListBox1.Items.RemoveAt(delIndex) End If End Sub '最小化窗体,这里指隐藏窗体 Private Sub 最小化ToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles 最小化ToolStripMenuItem.Click If Me.Visible = True Then StrToItems() delayTime.Value = delay Me.Hide() End If End Sub Private Sub 创建开机自动运行() Dim key As Microsoft.Win32.RegistryKey, subkey As Microsoft.Win32.RegistryKey key = Microsoft.Win32.Registry.LocalMachine subkey = key.CreateSubKey("SOFTWARE\Microsoft\Windows\CurrentVersion\Run") subkey.SetValue("定时自动关机", Application.ExecutablePath) End Sub Private Sub 删除开机自动运行() Dim key As Microsoft.Win32.RegistryKey, subkey As Microsoft.Win32.RegistryKey key = Microsoft.Win32.Registry.LocalMachine subkey = key.OpenSubKey("SOFTWARE\Microsoft\Windows\CurrentVersion\Run", True) subkey.DeleteValue("定时自动关机") End Sub '关闭显示器 Public Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd As Integer, ByVal wMsg As Integer, ByVal wParam As Integer, ByVal lParam As Integer) As Integer Public Const WM_SYSCOMMAND = &H112 Public Const SC_MONITORPOWER = &HF170 '关闭显示器 Private Declare Function ShellExecute Lib "shell32.dll" Alias "ShellExecuteA" (ByVal hWnd As Long, ByVal lpOperation As String, ByVal lpFile As String, ByVal lpParameters As String, ByVal lpDirectory As String, ByVal nShowCmd As Long) As Long 'Timer1的Tick事件,来监视现在的时间是否应该关机或别的了 Private Sub Timer1_Tick(ByVal sender As Object, ByVal e As System.EventArgs) Handles Timer1.Tick Static nowTime As Date = Now updataMsg() If SysTime Then If (Now nowTime) Then Today = nowTime TimeOfDay = nowTime End If End If nowTime = nowTime.AddSeconds(1) If (shutTime "") Then Dim temp1() As String = shutTime.Split(";") 'temp1字符串数组存放shutTime以";"分隔的各个字符子串 Dim temp2() As String, i As Integer 'temp2字符串数组存放temp1某项的字符串以","或":"分隔的字符子串 Dim TimeOut As Boolean = False 'TimeOut存放是否时间到了 For i = 0 To temp1.Length - 1 temp2 = temp1(i).Split(New Char() {",", ":"}) If IsTimeOut(temp2) Then '判断时间是否到了 TimeOut = True action = temp2(4) '是"关机","注销","重启" End If Next If TimeOut Then '如果时间到 Select Case Mid(action, 1, 4) '根据action肯定命令字符串 Case "关闭计算" shellText = "shutdown -s -f -t 0" Case "重启计算" shellText = "shutdown -r -f -t 0" Case "注销用户" shellText = "shutdown -l -f -t 0" Case "关闭显示" SendMessage(Me.Handle.ToInt32(), WM_SYSCOMMAND, SC_MONITORPOWER, 1) Exit Sub Case "锁定计算" shellText = "rundll32.exe user32.dll, LockWorkStation" Case "打开文件" System.Diagnostics.Process.Start(Mid(action, 6, action.Length - 6).Replace("：", ":")) Exit Sub Case "提醒信息" MsgBox(Mid(action, 6, action.Length - 6), , "提醒信息") Exit Sub Case "打开网址" System.Diagnostics.Process.Start(Mid(action, 6, action.Length - 6).Replace("：", ":")) Exit Sub End Select lastTime = delay '倒计时等于延时 Timer2.Start() '倒计时开始取消窗体.Show() '倒计时窗口打开 Timer1.Stop() End If End If End Sub '判断时间是否到了 Private Function IsTimeOut(ByRef t() As String) As Boolean '如果时分秒都相等 If t(1) = CStr(Hour(Now())) And t(2) = CStr(Minute(Now()) And t(3) = Second(Now)) Then Select Case t(0) Case "每天" Return True Case "今天" Return True Case "每周二" If Weekday(Now) = FirstDayOfWeek.Tuesday Then Return True End If Case "每周六" If Weekday(Now) = FirstDayOfWeek.Saturday Then Return True End If Case "每周日" If Weekday(Now) = FirstDayOfWeek.Sunday Then Return True End If Case "每周三" If Weekday(Now) = FirstDayOfWeek.Wednesday Then Return True End If Case "每周四" If Weekday(Now) = FirstDayOfWeek.Thursday Then Return True End If Case "每周五" If Weekday(Now) = FirstDayOfWeek.Friday Then Return True End If Case "每周一" If Weekday(Now) = FirstDayOfWeek.Monday Then Return True End If Case "每周一至周五" If Weekday(Now) > FirstDayOfWeek.Sunday And Weekday(Now) < FirstDayOfWeek.Saturday Then Return True End If Case Else If (t(0) = Today.ToShortDateString) Then Return True End If End Select End If Return False End Function '刷新Msg控件 Private Sub updataMsg() Dim xingqi As String = "" Select Case Weekday(Now) Case 1 xingqi = "星期天" Case 2 xingqi = "星期一" Case 3 xingqi = "星期二" Case 4 xingqi = "星期三" Case 5 xingqi = "星期四" Case 6 xingqi = "星期五" Case 7 xingqi = "星期六" End Select msg.Text = "当前时间" & Now().ToLongDateString & " " & Now().ToLongTimeString & " " & xingqi & " CPU使用" & Format(proTime.NextValue, "#0") & "% 网速" & Format(TotalData.NextValue / 1024, "########0.00") & "KB/S" Me.NotifyIcon1.Text = msg.Text End Sub '倒计时处理事件 Private Sub Timer2_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer2.Tick If lastTime = 0 Then '如果时间到 Shell(shellText, AppWinStyle.Hide) 取消窗体.Label1.Text = "正在" & action Else 取消窗体.Label1.Text = "离" & action & "还有" & lastTime & "秒" '显示倒计时 lastTime -= 1 End If End Sub Private Sub 设置窗体_Shown(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Shown If autoHide Then Me.Hide() End If End Sub Private Sub ComboBox2_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ComboBox2.SelectedIndexChanged Select Case ComboBox2.SelectedItem Case "打开网址" Button1.Visible = False TextBox1.Width = 299 TextBox1.Visible = True Case "提醒信息" Button1.Visible = False TextBox1.Width = 299 TextBox1.Visible = True Case "打开文件" Button1.Visible = True TextBox1.Width = 209 TextBox1.Visible = True Case Else Button1.Visible = False TextBox1.Visible = False End Select End Sub Private Sub ComboBox1_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ComboBox1.SelectedIndexChanged If ComboBox1.SelectedItem = "指定日期" Then DateTimePicker1.Visible = True Else DateTimePicker1.Visible = False End If End Sub Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click If OpenFileDialog1.ShowDialog() = Windows.Forms.DialogResult.OK Then TextBox1.Text = OpenFileDialog1.FileName End If End Sub Private Sub 立即关机ToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles 立即关机ToolStripMenuItem.Click Shell("shutdown -s -f -t 0") End Sub Private Sub 立即重启ToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles 立即重启ToolStripMenuItem.Click Shell("shutdown -r -f -t 0") End Sub Private Sub 立即注销ToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles 立即注销ToolStripMenuItem.Click Shell("shutdown -l -f -t 0") End Sub Private Sub 立即锁定计算机ToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles 立即锁定计算机ToolStripMenuItem.Click Shell("rundll32.exe user32.dll, LockWorkStation") End Sub Private Sub 立即关闭显示器ToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles 立即关闭显示器ToolStripMenuItem.Click SendMessage(Me.Handle.ToInt32(), WM_SYSCOMMAND, SC_MONITORPOWER, 1) End Sub Private Sub LinkLabel1_LinkClicked(ByVal sender As System.Object, ByVal e As System.Windows.Forms.LinkLabelLinkClickedEventArgs) Handles LinkLabel1.LinkClicked System.Diagnostics.Process.Start("http://lywang.5d6d.com/space-uid-1.html") End Sub End Class

本课程教你在IBM服务器上规划RAID和安装win2008R2，在维护IBM服务器的时候经常遇到RAID卡信息丢失，虽然多个硬盘做了RAID1或RAID5，一次断电或不关机热插拔硬盘，导致系统无法正常启动，影响业务正常运行，同时硬盘数据有可能丢失，本次就是一次RAID卡信息丢失，四块硬盘，两块橙色灯，系统无法启动提示如下错误IBM system 3650 M4服务器启动，提示错误如下 The following VDs are missing complete spans:00 If you proceed (or load the configureateion atility),these VDs will be removed from your configuration an the remaining drivers marked as foreign. If you wish to use them at a later time,restore the missing span(s) and use foreign import to recouver the VDs.if you believe these VDs should be present,please power off your system and check you cables to ensure all disks are present. Press any key to continue, or “C” to load the configuration utility. 找回硬盘文件数据和安装系统使业务正常

4 浏览器网络编程（共两周） 4.1 浏览器工作原理（老师讲解1学时，学生理解1学时）浏览器工作原理如图4-1所示。图4-1 浏览器工作原理 (1) 浏览器分析超链指向页面的 URL。 (2) 浏览器向 DNS 请求解析 www.tsinghua.edu.cn 的 IP 地址。 (3) 域名系统 DNS 解析出清华大学服务器的 IP 地址。 (4) 浏览器与服务器建立 TCP 连接 (5) 浏览器发出取文件命令： GET /chn/yxsz/index.htm。 (6) 服务器给出响应，把文件 index.htm 发给浏览器。 (7) TCP 连接释放。 (8) 浏览器显示“清华大学院系设置”文件 index.htm 中的所有文本 4.2 浏览器功能结构（老师讲解1学时，学生理解1学时）浏览器程序功能结构如图4-2所示。图4-2 浏览器功能结构 1) 浏览器有一组客户、一组解释程序，以及管理这些客户和解释程序的控制程序。 2) 控制程序是其中的核心部件，它解释鼠标的点击和键盘的输入，并调用有关的组件来执行用户指定的操作。 3) 例如，当用户用鼠标点击一个超链的起点时，控制程序就调用一个客户从所需文档所在的远地服务器上取回该文档，并调用解释程序向用户显示该文档 4) HTML 解释程序是必不可少的，而其他的解释程序则是可选的。 5) 解释程序把 HTML 规格转换为适合用户显示硬件的命令来处理版面的细节。 6) 许多浏览器还包含 FTP 客户，用来获取文件传送服务。 7) 一些浏览器也包含电子邮件客户，使浏览器能够发送和接收电子邮件 8) 浏览器将它取回的每一个页面副本都放入本地磁盘的缓存中。 9) 当用户用鼠标点击某个选项时，浏览器首先检查磁盘的缓存。若缓存中保存了该项，浏览器就直接从缓存中得到该项副本而不必从网络获取，这样就明显地改善浏览器的运行特性。 10) 但缓存要占用磁盘大量的空间，而浏览器性能的改善只有在用户再次查看缓存中的页面时才有帮助。 11) 许多浏览器允许用户调整缓存策略。 4.3 浏览器设计（老师讲解2学时，学生设计2学时）（1）浏览器功能设计浏览器功能设计主要确定设计好的浏览器需要具备哪些功能，以及这些功能是以什么方式进行实现，这个步骤相当于软件设计中的“需求分析”，其中必须保证基本功能的具备，即浏览器必须能够浏览Web页面。（2）浏览器界面设计浏览器界面设计主要确定浏览器的页面布局，设定浏览器窗口上设置哪些功能菜单项、设置哪些功能按钮、设置哪些状态栏，它们各自的位置如何、属性如何、对应的变量如何等等。（3）浏览器代码设计浏览器代码设计主要是确定对上述的设计的功能在代码上怎样实现，包括选用的程序语言和编程平台选择、程序代码的编写、程序代码的调试、程序功能的测试等等。 4.4 浏览器编程设计平台（老师讲解2学时，学生理解4学时）（1）VS2005编程平台（2）WebBrowser类及其使用（3）一些浏览器程序的代码分析 4.5 浏览器开发步骤（8天）（1）熟悉VS2005平台，建立项目（半天）打开VS2005选择“创建项目”，进入“新建项目”对话框，如图4-1所示。图4-1 “新建项目”对话框在“新建项目”对话框的项目类型窗口中选中“Visual C#”作为项目开发语言，在模板窗口中选中“Windows 应用程序”作为项目开发模板，在“名称”、“位置”编辑框中输入自己设定的项目名字和项目存储位置，本讲义使用“CSharp浏览器”作为项目名称，如图4-2所示。图4-2 输入新建项目的属性完成输入内容后，单击“确定”按钮，进入项目VC#开发窗口“Form.cs[设计]”，如图4-3所示。图4-3 VC#开发窗口“Form.cs[设计]” （2）界面设计（1天） ○1设计菜单栏如图4-4所示。（半天）图4-4 设计菜单栏设计“文件”菜单如4-5所示。图4-5 设计“文件”菜单设计“编辑”菜单如图4-6所示。图4-6 设计“编辑”菜单设计“查看”菜单如图4-7所示。图4-7 设计“查看”菜单设计“收藏”菜单如图4-8所示。图4-8 设计“收藏”菜单设计“工具”菜单如图4-9所示。图4-9 设计“工具”菜单 ○2设计工具栏、用户区和状态栏如图4-10所示（半天）图4-10 工具栏和状态栏（3）功能代码编辑 ○1初始化代码（半天）双击“Form”设计页面进入代码编写页面，如图4-11所示。图4-11 代码编写页面初始化页面代码如下： ////////////////////////////////////////////////////////

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