wpf 只让窗口保留一个，并在最前显示

来源：互联网发布：java socket 数据传输编辑：程序博客网时间：2024/05/22 05:07

就是遍历所有的，有的话就不生成了，没有的话就生成一个，还有最前是一个参数，最后就是窗口事件了。

          //如果容器里没有预览控件，就加入控件            ChangeDistingWordOfSelected mw = null;            foreach (Window win in App.Current.Windows)            {                if (win is ChangeDistingWordOfSelected)                {                    mw = win as ChangeDistingWordOfSelected;                }            }            if (mw == null)            {                mw = new ChangeDistingWordOfSelected();                mw.WindowStartupLocation = WindowStartupLocation.Manual;               // mw.Left = 1025;//窗口生成的位置                mw.Left = Mouse.GetPosition(GlobalHelper._mainWindow).X;                mw.Top = Mouse.GetPosition(this).Y ;                mw.Show();            }            else            {                mw.Visibility = System.Windows.Visibility.Visible;                mw.Topmost = true;            }            mw.btn_ok.Click += delegate//确定替换字            {                ListResult[CurrentLineIndex].LineTxtInfo[CurrentTxtIndex].TxtResult = mw.ChangedWord.Text;//更换选中的字;                ObservableCollection<string> strNewLineTxt = new ObservableCollection<string>();                strNewLineTxt.Clear();                for (int l = 0; l < ListResult[CurrentLineIndex].LineTxtInfo.Count; l++)                {                    strNewLineTxt.Add(ListResult[CurrentLineIndex].LineTxtInfo[l].TxtResult);                }                this.ListListBox[CurrentLineIndex].ItemsSource = strNewLineTxt;                mw.Close();            };

2,也可以新那家一个全局的窗口对象，每次检查当前对象是否为空

 if (drawingsoftware_wnd == null)            {                double height = this.Height;                double width = this.Width;                drawingsoftware_wnd = new DrawingSoftware_Popup(this, height, width);                drawingsoftware_wnd.Owner = this;            }            if (!drawingsoftware_wnd.IsVisible)            {                drawingsoftware_wnd.Show();                this.Hide();            }            else            {                drawingsoftware_wnd.Hide();            }

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