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wpf中UserControl关闭的问题
song890823
2015-03-21 11:31:43
我加载了一个UserControl,不知道怎么关闭它啊 ,是在wpf中哦,如果在winform中的话是可以有dispose方法,而wpf中确没有,我想关闭它,释放掉资源,不是仅仅的隐藏哦,如果有经验的麻烦不惜赐教~~万分感谢
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wpf中UserControl关闭的问题
我加载了一个UserControl,不知道怎么关闭它啊 ,是在wpf中哦,如果在winform中的话是可以有dispose方法,而wpf中确没有,我想关闭它,释放掉资源,不是仅仅的隐藏哦,如果有经验的麻烦不惜赐教~~万分感谢
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song890823
2015-03-22
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引用 1 楼 wjq 的回复:
断开所有引用,去掉所有事件关联,然后等着GC帮你回收
目前看好像只有能这样了 ,谢谢啦
wjq
2015-03-21
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断开所有引用,去掉所有事件关联,然后等着GC帮你回收
WPF
自适应可
关闭
的Tab
Control
标签
建一个用户控件,继承自TabItem,里面放个按钮,点击的时候在Tab
Control
中
移除自身.在添加,移除TabItem和Tab
Control
尺寸变化时,通过Items的个数计算合适的Width,很漂亮哦!
C# winform 子窗体调用父窗体函数实现
关闭
该窗体打开另一个窗体
C# winform 子窗体调用父窗体函数实现
关闭
该窗体打开另一个窗体;在父窗体分From1内嵌一个panel1,在panel1里载入From2,点击在子窗体From2
中
的按钮,清除panel1里的From2,新载入From3,点击在子窗体From3
中
的按钮,panel1清除,重新载入From2
WPF
MVVM 编程模式/框架 基础+提高 项目开发实战视频教程
WPF
技术主要特点是数据驱动界面 UI,当数据发生变化时,
WPF
将自动通知 UI 界面同步更新,MVVM 模式充分利用了
WPF
的依赖属性、数据和命令绑定等机制,最大限度地界面显示和逻辑代码之间的耦合度,如需要调整界面时,逻辑代码不需要作大的修改,同样逻辑代码的修改也不需要界面作调整。使用 MVVM 架构具有容易维护,扩展灵活,UI 设计师和程序开发者可以更好的分工及协同工作。本教程共23堂课,总时长近8小时,将通过两个案例(登陆和学生管理系统),让大家直观了解 MVVM 实现过程,并在实际操作
中
逐步掌握 MVVM 编程模式的一些重要知识点及开发技巧。
wpf
写一个秒表计时器程序
WPF
秒表 计时器 定时关机 到计时关机 public const uint WM_SYSCOMMAND = 0x0112; public const uint SC_MONITORPOWER = 0xF170; [DllImport("
user
32")] public static extern IntPtr SendMessage(IntPtr hWnd, uint wMsg, uint wParam, int lParam); /// ///
关闭
显示器 /// public void CloseScreen() { IntPtr windowHandle = Process.GetCurrentProcess().MainWindowHandle; SendMessage(windowHandle, WM_SYSCOMMAND, SC_MONITORPOWER, 2); // 2 为
关闭
显示器, -1则打开显示器 } using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Windows; using System.Windows.
Control
s; using System.Windows.Data; using System.Windows.Documents; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Imaging; using System.Windows.Navigation; using System.Windows.Shapes; using System.Windows.Threading; using IniFiles; namespace StopWatch { /// /// shutdonwCtrl.xaml 的交互逻辑 /// public partial class shutdonwCtrl :
User
Control
{ DispatcherTimer timer1; DispatcherTimer timer2; public shutdonwCtrl() { InitializeComponent(); timer1 = new DispatcherTimer(); timer1.Tick += new EventHandler(OnTimer1); timer1.Interval = new TimeSpan(0, 0, 1); timer2 = new DispatcherTimer(); timer2.Tick += new EventHandler(OnTimer2); timer2.Interval = new TimeSpan(0, 0, 1); btn_cancel.IsEnabled = false; cancel1.IsEnabled = false; } IniFile INI = new IniFile(IniFile.AppIniName); public void LoadIni() { cbo_hour.Text = INI.ReadString("定时关机", "时", "0"); cbo_Minute.Text = INI.ReadString("定时关机", "分", "0"); cbo_Second.Text = INI.ReadString("定时关机", "秒", "0"); cbo1.Text = INI.ReadString("到计时关机", "分", "0"); //combobox1.Text = INI.ReadString("到计时", "时", "0"); //combobox2.Text = INI.ReadString("到计时", "分", "0"); //combobox3.Text = INI.ReadString("到计时", "秒", "0"); } public void SaveIni() { INI.WriteString("定时关机", "时", cbo_hour.Text); INI.WriteString("定时关机", "分", cbo_Minute.Text); INI.WriteString("定时关机", "秒", cbo_Second.Text); INI.WriteString("到计时关机", "分", cbo1.Text); } private void ShutDown() { System.Diagnostics.Process.Start("shutdown.exe", "-s -t 1"); } private void OnTimer1(object sender,EventArgs e) { if (second > 0) second--; label1.Content = string.Format("Windows将在 {0} 关机", TimerClass.GetTimeString1(second)); if (second <= 0 && !cbo1.IsEnabled) { ShutDown(); } } int second = 0; private void Button_Click(object sender, RoutedEventArgs e) { second = Convert.ToInt32(cbo1.Text) * 60; if (second <= 0) { MessageBox.Show("数值必须大于0!"); return; } timer1.Start(); cbo1.IsEnabled = false; cancel1.IsEnabled = true; start1.IsEnabled = false; } private void Button_Click_1(object sender, RoutedEventArgs e) { label1.Content = " "; timer1.Stop(); second = 0; cbo1.IsEnabled = true; cancel1.IsEnabled = false; start1.IsEnabled = true; } private void OnTimer2(object sender, EventArgs e) { if ( DateTime.Now.Hour == Convert.ToInt32(cbo_hour.Text) && DateTime.Now.Minute == Convert.ToInt32(cbo_Minute.Text) && DateTime.Now.Second == Convert.ToInt32(cbo_Second.Text) ) { ShutDown(); } } private void Button_Click_2(object sender, RoutedEventArgs e) { int s = Convert.ToInt32(cbo_hour.Text) * 3600 + Convert.ToInt32(cbo_Minute.Text) * 60 + Convert.ToInt32(cbo_Second.Text); timer2.Start(); label2.Content = string.Format("Windows将在 {0} 关机", TimerClass.GetTimeString1(s)); btn_start.IsEnabled = false; btn_cancel.IsEnabled = true; cbo_hour.IsEnabled = false; cbo_Minute.IsEnabled = false; cbo_Second.IsEnabled = false; } private void btn_cancel_Click(object sender, RoutedEventArgs e) { label2.Content = ""; timer2.Stop(); btn_start.IsEnabled = true; btn_cancel.IsEnabled = false; cbo_hour.IsEnabled = true; cbo_Minute.IsEnabled = true; cbo_Second.IsEnabled = true; } } } using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Windows; using System.Windows.
Control
s; using System.Windows.Data; using System.Windows.Documents; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Imaging; using System.Windows.Navigation; using System.Windows.Shapes; using System.Threading.Tasks; using System.Runtime.InteropServices; using System.Windows.Threading; using IniFiles; namespace StopWatch { /// /// TimerCtrl.xaml 的交互逻辑 /// public partial class TimerCtrl :
User
Control
{ private DispatcherTimer timer1 = null; private DispatcherTimer timer2 = null; int SND_SYNC = 0x0000; /* play asynchronously */ //异步 int SND_ASYNC = 0x0001; int SND_LOOP = 8; [DllImport("winmm")] public static extern bool PlaySound(string szSound, IntPtr hMod, int flags); private void playSound3() { Task tsk = new Task(new Action(proc)); tsk.Start(); } private void proc() { PlaySound(@"Sound\2.wav", IntPtr.Zero, SND_SYNC); PlaySound(@"Sound\2.wav", IntPtr.Zero, SND_SYNC); PlaySound(@"Sound\2.wav", IntPtr.Zero, SND_SYNC); } public TimerCtrl() { InitializeComponent(); timer1 = new DispatcherTimer(); timer1.Tick += new EventHandler(OnTimer1); timer1.Interval = new TimeSpan(0, 0, 1); timer2 = new DispatcherTimer(); timer2.Tick += new EventHandler(OnTimer2); timer2.Interval = new TimeSpan(0, 0, 1); btn_reset1.IsEnabled = false; btn_pause1.IsEnabled = false; } int h = 0; int m = 0; int s = 0; int seconds = 0; private void OnTimer1(object sender, EventArgs e) { if (seconds < 1) { PlaySound(@"Sound\2.wav", IntPtr.Zero, SND_ASYNC); btn_start.IsEnabled = false; btn_reset1.IsEnabled = true; btn_pause1.IsEnabled = false; combobox1.IsEnabled = true; combobox2.IsEnabled = true; combobox3.IsEnabled = true; return; } seconds--; label1.Content = TimerClass.GetTimeString1(seconds); } private void btn_start_Click(object sender, RoutedEventArgs e) { h = Convert.ToInt32(combobox1.Text); m = Convert.ToInt32(combobox2.Text); s = Convert.ToInt32(combobox3.Text); seconds = h * 3600 + m * 60 + s; label1.Content = TimerClass.GetTimeString1(seconds); timer1.Start(); btn_start.IsEnabled = false; btn_reset1.IsEnabled = true; btn_pause1.IsEnabled = true; combobox1.IsEnabled = false; combobox2.IsEnabled = false; combobox3.IsEnabled = false; } private void btn_reset_Click(object sender, RoutedEventArgs e) { seconds = 0; label1.Content = TimerClass.GetTimeString1(seconds); timer1.Stop(); btn_start.IsEnabled = true; btn_reset1.IsEnabled = false; btn_pause1.IsEnabled = false; combobox1.IsEnabled = true; combobox2.IsEnabled = true; combobox3.IsEnabled = true; } private void pause1_Click(object sender, RoutedEventArgs e) { if (btn_pause1.Content.ToString() == "暂停") { timer1.Stop(); btn_pause1.Content = "继续"; } else { timer1.Start(); btn_pause1.Content = "暂停"; } } int SEC = 0; private void OnTimer2(object sender, EventArgs e) { if (SEC < 1) { timer2.Stop(); playSound3(); btn_quick.IsEnabled = true; btn_cancel2.IsEnabled = false; combobox4.IsEnabled = true; return; } SEC--; label4.Content = TimerClass.GetTimeString1(SEC); } private void Button_Click(object sender, RoutedEventArgs e) { SEC = Convert.ToInt32(combobox4.Text) * 60; timer2.Start(); combobox4.IsEnabled = false; btn_quick.IsEnabled = false; btn_cancel2.IsEnabled = true; } private void Button_Click_1(object sender, RoutedEventArgs e) { SEC = 2; label4.Content = "00:00:00"; timer2.Stop(); combobox4.IsEnabled = true; btn_quick.IsEnabled = true; } IniFile INI = new IniFile(IniFile.AppIniName); public void LoadIni() { combobox1.Text = INI.ReadString("到计时", "时", "0"); combobox2.Text = INI.ReadString("到计时", "分", "0"); combobox4.Text = INI.ReadString("快速计时", "分", "0"); } public void SaveIni() { INI.WriteString("到计时", "时", combobox1.Text); INI.WriteString("到计时", "分", combobox2.Text); INI.WriteString("到计时", "秒", combobox3.Text); INI.WriteString("快速计时", "分", combobox4.Text); } } } using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Windows; using System.Windows.
Control
s; using System.Windows.Data; using System.Windows.Documents; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Imaging; using System.Windows.Navigation; using System.Windows.Shapes; using System.Threading; using System.Windows.Threading; namespace StopWatch { /// /// WatchCtrl.xaml 的交互逻辑 /// public partial class WatchCtrl :
User
Control
{ public WatchCtrl() { InitializeComponent(); timer1 = new DispatcherTimer(); timer1.Tick += new EventHandler(OnTimer1); timer1.Interval = new TimeSpan(0, 0, 1); timer1_1 = new DispatcherTimer(); timer1_1.Tick += new EventHandler(OnTimer1_1); timer1_1.Interval = new TimeSpan(0, 0, 0, 100); timer2 = new DispatcherTimer(); timer2.Tick += new EventHandler(OnTimer2); timer2.Interval = new TimeSpan(0, 0, 1); } private DispatcherTimer timer1 = null; private DispatcherTimer timer1_1 = null; private DispatcherTimer timer2 = null; private void OnTimer1(object sender, EventArgs e) { second++; label1.Content = TimerClass.GetTimeString1(second) ;//DateTime.Now.ToString("h:mm:ss"); } public int second = 0; private int second1 = 0; public int count = 0; private void OnTimer1_1(object sender, EventArgs e) { //label1.Content = TimerClass.GetTimeString1(second) + "." + count.ToString();//DateTime.Now.ToString("h:mm:ss"); //count++; //if (count > 9) // count = 0; } private void OnTimer2(object sender, EventArgs e) { second1++; label2.Content = TimerClass.GetTimeString1(second1) ;//.ToString("h:mm:ss"); } private void btn_start_Click(object sender, RoutedEventArgs e) { timer1.Start(); timer2.Start(); if (btn_start.Content.ToString() == "停止") { btn_start.Content = "开始"; btn_reset.Content = "复位"; timer1.Stop(); timer2.Stop(); } else { btn_start.Content = "停止"; btn_reset.Content = "计次"; } } private int counter = 0; private void btn_reset_Click(object sender, RoutedEventArgs e) { if (btn_reset.Content.ToString() == "复位") { second = 0; second1 = 0; label1.Content = "00:00:00"; label2.Content = "00:00:00"; timer1.Stop(); timer2.Stop(); } else { if (second1 > 0) { counter++; listbox1.Items.Add(string.Format(" {0}\t{1}", counter, label2.Content)); } second1 = 0; label2.Content = "00:00:00"; } if (btn_reset.Content.ToString() == "复位" && btn_start.Content.ToString()=="开始") { listbox1.Items.Clear(); } } } }
C# 自定义窗体的最大化、最小化和
关闭
按钮
自定义窗体的最大化、最小化和
关闭
按钮, C#移动无标题栏窗体的三种代码: C#移动无标题栏窗体的三种代码:第一种采用,需注意窗体上的控件是否把窗体覆盖了。。。MouseDown、MouseMove、MouseUp事件应该是鼠标所处位置最顶层的控件的事件 在窗体的类
中
声明两个变量 private Point mouseOffset; //记录鼠标指针的坐标 private bool isMouseDown = false; //记录鼠标按键是否按下 创建该窗体 MouseDown、MouseMove、MouseUp事件的相应处理程序 private void Form1_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e) { int xOffset; int yOffset; if (e.Button == MouseButtons.Left) { xOffset = -e.X ; yOffset = -e.Y ; mouseOffset = new Point(xOffset, yOffset); isMouseDown = true; } } private void Form1_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e) { if (isMouseDown) { Point mousePos =
Control
.MousePosition; mousePos.Offset(mouseOffset.X, mouseOffset.Y); Location = mousePos; } } private void Form1_MouseUp(object sender, System.Windows.Forms.MouseEventArgs e) { // 修改鼠标状态isMouseDown的值 // 确保只有鼠标左键按下并移动时,才移动窗体 if (e.Button == MouseButtons.Left) { isMouseDown = false; } } 第二种调用API 未验证 using System.Runtime.InteropServices; [DllImport("
user
32.dll")] public static extern bool ReleaseCapture(); [DllImport("
user
32.dll")] public static extern bool SendMessage(IntPtr hwnd, int wMsg, int wParam, int lParam); public const int WM_SYSCOMMAND = 0x0112; public const int SC_MOVE = 0xF010; public const int HTCAPTION = 0x0002; private void Form1_MouseDown(object sender, MouseEventArgs e) { ReleaseCapture(); SendMessage(this.Handle, WM_SYSCOMMAND, SC_MOVE + HTCAPTION, 0); } 第三种未验证 private bool isMouseDown = false; private Point FormLocation; //form的location private Point mouseOffset; //鼠标的按下位置 [DllImport("
user
32.dll")] public static extern bool ReleaseCapture(); [DllImport("
user
32.dll")] public static extern bool SendMessage(IntPtr hwnd, int wMsg, int wParam, int lParam); private const int WM_SYSCOMMAND = 0x0112;//点击窗口左上角那个图标时的系统信息 private const int SC_MOVE = 0xF010;//移动信息 private const int HTCAPTION = 0x0002;//表示鼠标在窗口标题栏时的系统信息 private const int WM_NCHITTEST = 0x84;//鼠标在窗体客户区(除了标题栏和边框以外的部分)时发送的消息 private const int HTCLIENT = 0x1;//表示鼠标在窗口客户区的系统消息 private const int SC_MAXIMIZE = 0xF030;//最大化信息 private const int SC_MINIMIZE = 0xF020;//最小化信息 protected override void WndProc(ref Message m) { switch (m.Msg) { case WM_SYSCOMMAND: if (m.WParam == (IntPtr)SC_MAXIMIZE) { m.WParam = (IntPtr)SC_MINIMIZE; } break; case WM_NCHITTEST: //如果鼠标移动或单击 base.WndProc(ref m);//调用基类的窗口过程——WndProc方法处理这个消息 if (m.Result == (IntPtr)HTCLIENT)//如果返回的是HTCLIENT { m.Result = (IntPtr)HTCAPTION;//把它改为HTCAPTION return;//直接返回退出方法 } break; } base.WndProc(ref m);//如果不是鼠标移动或单击消息就调用基类的窗口过程进行处理 } private void Form1_Load(object sender, EventArgs e) { } ------------------------------- 如何在窗体标题栏左边的控制菜单加入自己的菜单啊? 我们一般在窗口标题栏点右键 或 按Alt+空格 可以弹出那个菜单。 ------解决方案-------------------- using System.Runtime.InteropServices; [DllImport( "
user
32.dll ")] public static extern IntPtr GetSystemMenu(IntPtr hWnd, bool bRevert); [DllImport( "
user
32.dll ")] public static extern bool InsertMenu(IntPtr hMenu, uint uPosition, uint uFlags, uint uIDNewItem, string lpNewItem); public const int MF_BYCOMMAND = 0; public const int MF_STRING = 0; public const int MF_BYPOSITION = 0x400; public const int MF_SEPARATOR = 0x800; private const uint SC_ABOUT = 0x0001; public const int WM_SYSCOMMAND = 0x0112; private void Form1_Load(object sender, EventArgs e) { IntPtr vMenuHandle = GetSystemMenu(Handle, false); InsertMenu(vMenuHandle, 255, MF_STRING, SC_ABOUT, "About... "); } protected override void WndProc(ref Message m) { switch (m.Msg) { case WM_SYSCOMMAND: if ((uint)m.WParam == SC_ABOUT) { MessageBox.Show( "Zswang 路过! "); } break; } base.WndProc(ref m); }
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