C#中子窗口的拖拽与缩放功能如何实现

在C#中，要实现子窗口的拖拽和缩放功能，可以使用Windows Forms或WPF。这里分别给出两种方法的实现方法：

1. Windows Forms:

拖拽功能：

首先，需要在子窗口上添加一个Panel控件作为标题栏。然后，为该Panel添加MouseDown、MouseMove和MouseUp事件。

public partial class ChildForm : Form {     public ChildForm()     {         InitializeComponent();     }      private bool dragging = false;     private Point dragCursorPoint;     private Point dragFormPoint;      private void panelTitleBar_MouseDown(object sender, MouseEventArgs e)     {         dragging = true;         dragCursorPoint = Cursor.Position;         dragFormPoint = this.Location;     }      private void panelTitleBar_MouseMove(object sender, MouseEventArgs e)     {         if (dragging)         {             Point dif = Point.Subtract(Cursor.Position, new Size(dragCursorPoint));             this.Location = Point.Add(dragFormPoint, new Size(dif));         }     }      private void panelTitleBar_MouseUp(object sender, MouseEventArgs e)     {         dragging = false;     } } 

缩放功能：

在子窗口的边缘添加一个透明的Panel控件作为缩放区域。然后，为该Panel添加MouseDown、MouseMove和MouseUp事件。

private bool resizing = false; private Point resizeCursorPoint; private Point resizeFormSize;  private void panelResize_MouseDown(object sender, MouseEventArgs e) {     resizing = true;     resizeCursorPoint = Cursor.Position;     resizeFormSize = this.Size; }  private void panelResize_MouseMove(object sender, MouseEventArgs e) {     if (resizing)     {         Point dif = Point.Subtract(Cursor.Position, new Size(resizeCursorPoint));         this.Size = new Size(resizeFormSize.Width + dif.X, resizeFormSize.Height + dif.Y);     } }  private void panelResize_MouseUp(object sender, MouseEventArgs e) {     resizing = false; } 

2. WPF:

拖拽功能：

在子窗口的标题栏上添加鼠标事件。

    <!-- 标题栏内容 --> </Border> 

private bool dragging = false; private Point dragStartPosition;  private void titleBar_MouseLeftButtonDown(object sender, MouseButtonEventArgs e) {     dragging = true;     dragStartPosition = e.GetPosition(this);     this.CaptureMouse(); }  private void titleBar_MouseMove(object sender, MouseEventArgs e) {     if (dragging)     {         Point currentPosition = e.GetPosition(this);         double offsetX = currentPosition.X - dragStartPosition.X;         double offsetY = currentPosition.Y - dragStartPosition.Y;         this.Left += offsetX;         this.Top += offsetY;     } }  protected override void OnMouseLeftButtonUp(MouseButtonEventArgs e) {     base.OnMouseLeftButtonUp(e);     dragging = false;     this.ReleaseMouseCapture(); } 

缩放功能：

在子窗口的边缘添加一个透明的Border控件作为缩放区域。然后，为该Border添加鼠标事件。

private bool resizing = false; private Point resizeStartPosition;  private void resizeGrip_MouseLeftButtonDown(object sender, MouseButtonEventArgs e) {     resizing = true;     resizeStartPosition = e.GetPosition(this);     this.CaptureMouse(); }  private void resizeGrip_MouseMove(object sender, MouseEventArgs e) {     if (resizing)     {         Point currentPosition = e.GetPosition(this);         double offsetX = currentPosition.X - resizeStartPosition.X;         double offsetY = currentPosition.Y - resizeStartPosition.Y;         this.Width += offsetX;         this.Height += offsetY;     } }  protected override void OnMouseLeftButtonUp(MouseButtonEventArgs e) {     base.OnMouseLeftButtonUp(e);     resizing = false;     this.ReleaseMouseCapture(); } 

这样就实现了子窗口的拖拽和缩放功能。