C# Winform 实现控件自适应父容器大小的示例代码

在日常开发中经常遇到控件不能随着父容器大小的改变而且自动改变控件的所在位置和大小。以下是实现的代码

 /// <summary>
  /// 根据父容器实现控件自适应大小位置
  /// </summary>
  /// <param name="control">所需自适应大小位置的控件</param>
  private void ChangeLocationSizeByParent (Control control)
  {
    //记录父容器大小，来判断改变控件大小位置是因为父容器的改变还是通过设置控件大小位置去改变
    Size parentOldSize = control.Parent.Size;

    PointF locationPF = new PointF();
    locationPF.X = (float)control.Location.X / (float)control.Parent.Width;
    locationPF.Y = (float)control.Location.Y / (float)control.Parent.Height;
    
    PointF sizePF = new PointF();
    sizePF.X = (float)control.Width / (float)control.Parent.Width;
    sizePF.Y = (float)control.Height / (float)control.Parent.Height;

    control.LocationChanged += delegate (Object o, EventArgs e) {

      if (control.Parent != null&&parentOldSize.Equals(control.Parent.Size))
      {
        locationPF.X = (float)control.Location.X / (float)control.Parent.Width;
        locationPF.Y = (float)control.Location.Y / (float)control.Parent.Height;
        
      }
    };
    control.SizeChanged += delegate (Object o, EventArgs e) {

      if (control.Parent != null && parentOldSize.Equals(control.Parent.Size))
      {
        sizePF.X = (float)control.Width / (float)control.Parent.Width;
        sizePF.Y = (float)control.Height / (float)control.Parent.Height;
        
      }
    };
    control.ParentChanged += delegate (Object o, EventArgs e) {
      if (control.Parent == null)
      {
        return;
      }
      locationPF.X = (float)control.Location.X / (float)control.Parent.Width;
      locationPF.Y = (float)control.Location.Y / (float)control.Parent.Height;
      sizePF.X = (float)control.Width / (float)control.Parent.Width;
      sizePF.Y = (float)control.Height / (float)control.Parent.Height;
    };
    control.Parent.SizeChanged += delegate (Object po, EventArgs pe) {

      Control pControl = (Control)po;
      int x = (int)(pControl.Width * locationPF.X);
      int y = (int)(pControl.Height * locationPF.Y);
      control.Location = new Point(x, y);
      int width = (int)(pControl.Width * sizePF.X);
      int hetght = (int)(pControl.Height * sizePF.Y);
      control.Size = new Size(width, hetght);
      control.Refresh();
      parentOldSize = pControl.Size;
    };
  }

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