如果您有多个显示器，我相信屏幕 UI 尺寸会更大。因此，存储和恢复位置的正常“1 个监视器”方法将起作用。我没有尝试过这个，因为我远离我的第二台显示器，但它应该不难测试。您提出问题的方式似乎您还没有测试过。
您的第二个要求意味着您必须在恢复应用程序时检查最大屏幕尺寸，然后根据需要重新定位。为此，我使用以下代码：
private System.Drawing.Rectangle ConstrainToScreen(System.Drawing.Rectangle bounds)
{
Screen screen = Screen.FromRectangle(bounds);
System.Drawing.Rectangle workingArea = screen.WorkingArea;
int width = Math.Min(bounds.Width, workingArea.Width);
int height = Math.Min(bounds.Height, workingArea.Height);
// mmm....minimax
int left = Math.Min(workingArea.Right - width, Math.Max(bounds.Left, workingArea.Left));
int top = Math.Min(workingArea.Bottom - height, Math.Max(bounds.Top, workingArea.Top));
return new System.Drawing.Rectangle(left, top, width, height);
}
我在恢复表单的时候调用这个方法。我在表单关闭时将屏幕几何图形存储在注册表中，然后在表单打开时读取几何图形。我得到了边界，然后使用上面的方法将恢复的边界约束到实际的当前屏幕。
关闭时保存：
// store the size of the form
int w = 0, h = 0, left = 0, top = 0;
if (this.Bounds.Width < this.MinimumSize.Width || this.Bounds.Height < this.MinimumSize.Height)
{
// The form is currently minimized.
// RestoreBounds is the size of the window prior to last minimize action.
w = this.RestoreBounds.Width;
h = this.RestoreBounds.Height;
left = this.RestoreBounds.Location.X;
top = this.RestoreBounds.Location.Y;
}
else
{
w = this.Bounds.Width;
h = this.Bounds.Height;
left = this.Location.X;
top = this.Location.Y;
}
AppCuKey.SetValue(_rvn_Geometry,
String.Format("{0},{1},{2},{3},{4}",
left, top, w, h, (int)this.WindowState));
在表单打开时恢复：
// restore the geometry of the form
string s = (string)AppCuKey.GetValue(_rvn_Geometry);
if (!String.IsNullOrEmpty(s))
{
int[] p = Array.ConvertAll<string, int>(s.Split(','),
new Converter<string, int>((t) => { return Int32.Parse(t); }));
if (p != null && p.Length == 5)
this.Bounds = ConstrainToScreen(new System.Drawing.Rectangle(p[0], p[1], p[2], p[3]));
}