新窗口复制

Question

我正在开发一个使用 Wcf 从数据库获取数据的接口，我遇到了以下问题，我正在使用动态窗口来显示信息以及一些日期时间和关闭按钮等......

但是，当我关闭窗口并重新打开它时，它会将所有内容添加回已经存在的表单，这会产生双重并导致一些问题，任何建议都会很棒，提前感谢

这里有一些代码可以更好地描述我所拥有的东西。

这是我在主窗体上的按钮，它创建新窗口

private void butMoreInf_Click(object sender, RoutedEventArgs e)
{
    winMain.DataContext = null;
    winMainContainer.DataContext = null;
    winMainContainerLeft.DataContext = null;
    winMainContainerRight.DataContext = null;
    datGrid.DataContext = null;
    //Generate the new window and panel to go within the window
    winMain.Height = 750;
    winMain.Width = 950;
    winMainContainer.Width = 1000;
    winMainContainer.HorizontalAlignment = HorizontalAlignment.Left;
    winMainContainerLeft.Width = 120;
    winMainContainerLeft.HorizontalAlignment = HorizontalAlignment.Left;
    winMainContainerRight.Width = 880;
    winMainContainerRight.HorizontalAlignment = HorizontalAlignment.Left;
    //Generate the datagrid to contain the date to be changed etc.
    datGrid.Margin = new Thickness(0, 12, 12, 12);
    datGrid.HorizontalAlignment = HorizontalAlignment.Right;
    //Generate a datepicker (start) and label
    Label labS = new Label();
    labS.Content = "Pick a start date";
    labS.Width = 100;
    labS.Margin = new Thickness(12, 1, 0, 1);
    labS.HorizontalAlignment = HorizontalAlignment.Left;
    DatePicker datPickStart = new DatePicker();
    datPickStart.Width = 100;
    datPickStart.Margin = new Thickness(12, 12, 1, 0);
    datPickStart.HorizontalAlignment = HorizontalAlignment.Left;
    datPickStart.SelectedDate = DateTime.Now.AddDays(-7);
    datStartPick = datPickStart.SelectedDate == null ? DateTime.Now : Convert.ToDateTime(datPickStart.SelectedDate);
    //Generate a datepicker (end) and label
    Label labE = new Label();
    labE.Content = "Pick an end date";
    labE.Width = 100;
    labE.Margin = new Thickness(12, 1, 0, 1);
    labE.HorizontalAlignment = HorizontalAlignment.Left;
    DatePicker datPickEnd = new DatePicker();
    datPickEnd.Width = 100;
    datPickEnd.Margin = new Thickness(12, 12, 1, 0);
    datPickEnd.HorizontalAlignment = HorizontalAlignment.Left;
    datPickEnd.SelectedDate = DateTime.Now;
    datEndPick = datPickEnd.SelectedDate == null ? DateTime.Now : Convert.ToDateTime(datPickEnd.SelectedDate);
    //Generate dropdown and label for that box
    Label labY = new Label();
    labY.Content = "";
    labY.Width = 100;
    labY.Margin = new Thickness(12, 1, 0, 1);
    labY.HorizontalAlignment = HorizontalAlignment.Left;
    ComboBox txtY = new ComboBox();
    txtY.Width = 100;
    txtY.Margin = new Thickness(12, 12, 1, 0);
    txtY.HorizontalAlignment = HorizontalAlignment.Left;
    txtY.SelectedIndex = 0;
    txtY.SelectionChanged += CLLoadErrors;
    txtY.SelectedIndex = 0;
    //Generate error list button
    Button butError = new Button();
    butError.Width = 100;
    butError.Margin = new Thickness(12, 12, 1, 0);
    butError.HorizontalAlignment = HorizontalAlignment.Left;
    butError.Content = "Get Errors";
    butError.Click += CLLoadErrors;
    //Generate clear button
    Button butClear = new Button();
    butClear.Width = 100;
    butClear.Margin = new Thickness(12, 12, 1, 0);
    butClear.HorizontalAlignment = HorizontalAlignment.Left;
    butClear.Content = "Clear Grid";
    butClear.Click += clearDataGrid;
    //Generate close button
    Button butClose = new Button();
    butClose.Width = 100;
    butClose.Margin = new Thickness(12, 12, 1, 0);
    butClose.HorizontalAlignment = HorizontalAlignment.Left;
    butClose.Content = "Close";
    butClose.Click += CLHide;
    //Add elements to the stackpanel / Also updates them before each instance
    winMainContainerLeft.UpdateLayout();
    winMainContainerLeft.Children.Add(labS);
    winMainContainerLeft.Children.Add(datPickStart);
    winMainContainerLeft.Children.Add(labE);
    winMainContainerLeft.Children.Add(datPickEnd);
    winMainContainerLeft.Children.Add(labY);
    winMainContainerLeft.Children.Add(txtY);
    winMainContainerLeft.Children.Add(butError);
    winMainContainerLeft.Children.Add(butClear);
    winMainContainerLeft.Children.Add(butClose);
    winMainContainerRight.UpdateLayout();
    winMainContainerRight.Children.Remove(datGrid);
    winMainContainerRight.Children.Add(datGrid);
    winMainContainer.UpdateLayout();
    winMainContainer.Orientation = Orientation.Horizontal;
    winMainContainer.Children.Remove(winMainContainerLeft);
    winMainContainer.Children.Add(winMainContainerLeft);
    winMainContainer.Children.Remove(winMainContainerRight);
    winMainContainer.Children.Add(winMainContainerRight);
    winMain.ResizeMode = ResizeMode.NoResize;
    //Display the new form
    winMain.UpdateLayout();
    winMain.Content = winMainContainer;
    winMain.Show();
    datGrid.MouseDoubleClick += datGridDClick;
    txtY.SelectionChanged += new SelectionChangedEventHandler(txtY_SelectionChanged);
}

如果需要，将提供更多代码。

Answer 1

你一次又一次地重用同一个窗口（为什么？），所以你需要在添加新元素之前清除子集合，否则每次点击你的按钮都会显示窗口+你添加的每个控件，导致双/三/...控制。

更新：我假设您使用StackPanels（来自您的评论/具有Children枚举）。Children枚举是一个 UIElementCollection，它允许调用 Clear 方法。只需在添加新控件之前调用此控件即可。（winMainContainer、winMainContainerRight和winMainContainerLeft）

Answer 2

你在哪里初始化 winMain？它是一个静态变量还是存在于您当前的形式中？

我猜你一直在向现有对象添加控件（这会导致复制效果）。要解决此问题，您可以重新初始化表单对象

winMain = new WinMainForm();

或者，您可以在添加新子变量之前删除 winMain 变量上的所有控件

foreach(var c in winMainContainer.children){
  winMainContainer.children.remove(c)
}

Answer 3

看起来您根本没有创建新窗口，而只是在更高范围内存在的"winMain"上执行操作。 因此，每次调用该函数时，您都会向堆栈面板添加越来越多的子项。

您可以通过在方法开始时执行类似操作来解决问题。

winMainContainerLeft.Clear();
winMainContainerRight.Clear();
winMainContainer.Children.Clear();

我还注意到您在示例中包含以下行：

winMainContainer.Children.Remove(winMainContainerLeft);
winMainContainer.Children.Add(winMainContainerLeft);
winMainContainer.Children.Remove(winMainContainerRight);
winMainContainer.Children.Add(winMainContainerRight);

但是在添加它们之前，您不需要删除它们（无论如何这都没有意义。