c# - Conflict in using SizeToContent=widthandHeight and WindowStartupLocation in WPF

Question

We're stuck on an issue about the appropriate use of SizeToContent=WidthandHeight and WindowStartupLocation=CenterScreen in WPF. After resizing, our window has strange black border and it is not at the center.

Answer 1

我们已经用这个类解决了它。所以你应该使用它而不是普通的 Window

public class CustomizableChromeWindow : Window, INotifyPropertyChanged
        {

            protected override void OnStateChanged(EventArgs e)
            {
                base.OnStateChanged(e);
                OnPropertyChanged("CaptionButtonMargin");
            }

            public override void OnApplyTemplate()
            {
                base.OnApplyTemplate();
                HandleSizeToContent();
            }
            private void HandleSizeToContent()
            {
                if (this.SizeToContent == SizeToContent.Manual)
                    return;

                var previosTopXPosition = this.Left;
                var previosTopYPosition = this.Top;
                var previosWidth = this.MaxWidth;
                var previosHeight = this.MaxHeight;

                var previousWindowStartupLocation = this.WindowStartupLocation;
                var previousSizeToContent = SizeToContent;
                SizeToContent = SizeToContent.Manual;
                Dispatcher.BeginInvoke(
                DispatcherPriority.Loaded,
                (Action)(() =>
                {
                    this.SizeToContent = previousSizeToContent;

                    this.WindowStartupLocation = WindowStartupLocation.Manual;

                    this.Left = previosTopXPosition + (previosWidth - this.ActualWidth)/2;
                    this.Top = previosTopYPosition + (previosHeight - this.ActualHeight) / 2;
                    this.WindowStartupLocation = previousWindowStartupLocation;
                }));
            }
            public Thickness CaptionButtonMargin
            {
                get
                {
                    return new Thickness(0, 0, 0, 0);
                }
            }

            #region INotifyPropertyChanged
            private void OnPropertyChanged(String info)
            {
                if (PropertyChanged != null)
                {
                    PropertyChanged(this, new PropertyChangedEventArgs(info));
                }
            }

            public event PropertyChangedEventHandler PropertyChanged;
            #endregion
        }

Answer 2

在给出 MaxWith 和 MaxHeight 之前，该代码不起作用。为了解决这个问题，我改用了 RestoreBounds：

var previosWidth = this.RestoreBounds.Width;
var previosHeight = this.RestoreBounds.Height;