我遇到了一个小问题，我似乎无法找到答案。我有一个应用程序，它获取某些进程并获取它的窗口大小。唯一的问题是需要一定百分比的实际屏幕尺寸（用户看到）。
我想制作一个应用程序的屏幕截图，但如果我使用窗口的Rect，我得到的屏幕比它小，因为resolotion是125％。这意味着我输出的原始分辨率（1280 * 800）小于我的屏幕分辨率（1600 * 1000）你可以理解这个小小的打嗝使我的程序不可靠。我的问题是如何解决这个问题？
我创建了一个清单，我将DPIAware设置为true。我还在调试中禁用了Visual Studio主机。但它没有任何帮助。我仍然得到相同的值和相同的问题。这是我的实际屏幕截图的代码片段：
RECT Rect = new RECT();
System.Diagnostics.Process[] p = System.Diagnostics.Process.GetProcessesByName("Process");
ShowWindow(p[0].MainWindowHandle, 9);
SetForegroundWindow(p[0].MainWindowHandle);
if (GetWindowRect(p[0].MainWindowHandle, ref Rect))
{
var bmp = new Bitmap(Rect.Width, Rect.Height);
var graphics = Graphics.FromImage(bmp);
graphics.CopyFromScreen(Rect.Left, Rect.Top, 0, 0, new Size(Rect.Width, Rect.Height), CopyPixelOperation.SourceCopy);
bmp.Save(@"C:\Screenshots\temp1.png");
}
这为我提供了1280 * 800的屏幕截图，不足以涵盖整个过程，即1600 * 1000。一切都因为屏幕坐标不对而关闭。如果我将所有内容乘以1,25就可以了，但这不是解决方案，因为我不知道其他PC上的DPI设置是什么。
我会在其中发布包含RECT的完整代码。
RECT Rect = new RECT();
System.Diagnostics.Process[] p = System.Diagnostics.Process.GetProcessesByName("LoLPatcherUx");
ShowWindow(p[0].MainWindowHandle, 9);
SetForegroundWindow(p[0].MainWindowHandle);
if (GetWindowRect(p[0].MainWindowHandle, ref Rect))
{
int processH = Rect.Bottom - Rect.Top;
int processW = Rect.Right - Rect.Left;
float processWidth;
float processHeight;
SizeF dpi = GetCurrentDpi();
// Calc the scale.
SizeF scale = new SizeF()
{
Width = dpi.Width / 96f,
Height = dpi.Height / 96f
};
// Scale the rectangle.
processWidth = Rect.Width * scale.Width;
processHeight = Rect.Height * scale.Height;
var bmp = new Bitmap(lolPatcherBreedte, lolPatcherHoogte);
Graphics graphics = Graphics.FromImage(bmp);
graphics.CopyFromScreen(Rect.Left, Rect.Top, 0, 0, new Size(processW, processH));
bmp.Save(@"C:\Screenshots\temp1.png");
}
public struct RECT
{
private int _Left;
private int _Top;
private int _Right;
private int _Bottom;
public RECT(RECT Rectangle)
: this(Rectangle.Left, Rectangle.Top, Rectangle.Right, Rectangle.Bottom) { }
public RECT(int Left, int Top, int Right, int Bottom)
{
_Left = Left;
_Top = Top;
_Right = Right;
_Bottom = Bottom;
}
public int X
{
get { return _Left; }
set { _Left = value; }
}
public int Y
{
get { return _Top; }
set { _Top = value; }
}
public int Left
{
get { return _Left; }
set { _Left = value; }
}
public int Top
{
get { return _Top; }
set { _Top = value; }
}
public int Right
{
get { return _Right; }
set { _Right = value; }
}
public int Bottom
{
get { return _Bottom; }
set { _Bottom = value; }
}
public int Height
{
get { return _Bottom - _Top; }
set { _Bottom = value + _Top; }
}
public int Width
{
get { return _Right - _Left; }
set { _Right = value + _Left; }
}
public Point Location
{
get { return new Point(Left, Top); }
set
{
_Left = value.X;
_Top = value.Y;
}
}
public Size Size
{
get { return new Size(Width, Height); }
set
{
_Right = value.Width + _Left;
_Bottom = value.Height + _Top;
}
}
public static implicit operator Rectangle(RECT Rectangle)
{
return new Rectangle(Rectangle.Left, Rectangle.Top, Rectangle.Width, Rectangle.Height);
}
public static implicit operator RECT(Rectangle Rectangle)
{
return new RECT(Rectangle.Left, Rectangle.Top, Rectangle.Right, Rectangle.Bottom);
}
public static bool operator ==(RECT Rectangle1, RECT Rectangle2)
{
return Rectangle1.Equals(Rectangle2);
}
public static bool operator !=(RECT Rectangle1, RECT Rectangle2)
{
return !Rectangle1.Equals(Rectangle2);
}
public override string ToString()
{
return "{Left: " + _Left + "; " + "Top: " + _Top + "; Right: " + _Right + "; Bottom: " + _Bottom + "}";
}
public override int GetHashCode()
{
return ToString().GetHashCode();
}
public bool Equals(RECT Rectangle)
{
return Rectangle.Left == _Left && Rectangle.Top == _Top && Rectangle.Right == _Right && Rectangle.Bottom == _Bottom;
}
public override bool Equals(object Object)
{
if (Object is RECT)
{
return Equals((RECT)Object);
}
else if (Object is Rectangle)
{
return Equals(new RECT((Rectangle)Object));
}
return false;
}
}
答案 0 :(得分：4)
您可以通过
获取当前的DPI设置性质。
这样你就可以正确计算（它是我在我的一个项目中的表现方式）。
通过从中创建虚拟Form和Graphics对象（如果您的代码是在Form的上下文之外执行）来获取这些内容：
public static SizeF GetCurrentDpi()
{
using (Form form = new Form())
using (Graphics g = form.CreateGraphics())
{
var result = new SizeF()
{
Width = g.DpiX,
Height = g.DpiY
};
return result;
}
}
用法：
if (GetWindowRect(p[0].MainWindowHandle, ref Rect))
{
var bmp = new Bitmap(Rect.Width, Rect.Height);
Graphics graphics = Graphics.FromImage(bmp);
// Use the helper function to get the current dpi.
SizeF dpi = GetCurrentDpi();
// Calc the scale.
SizeF scale = new SizeF()
{
Width = dpi.Width / 96f,
Height = dpi.Height / 96f
};
// Scale the rectangle.
Rect.Width *= scale.Width;
Rect.Height *= scale.Height;
graphics.CopyFromScreen(Rect.Left, Rect.Top, 0, 0, new Size(Rect.Width, Rect.Height), CopyPixelOperation.SourceCopy);
bmp.Save(@"C:\Screenshots\temp1.png");
}
<强>演示：
class Program
{
[DllImport("user32.dll", SetLastError = true)]
static extern bool GetWindowRect(IntPtr hwnd, ref RECT lpRect);
[DllImport("user32.dll")]
[return: MarshalAs(UnmanagedType.Bool)]
static extern bool ShowWindow(IntPtr hWnd, ShowWindowCommands nCmdShow);
[DllImport("user32.dll")]
[return: MarshalAs(UnmanagedType.Bool)]
static extern bool SetForegroundWindow(IntPtr hWnd);
static void Main(string[] args)
{
RECT rect = new RECT();
Process[] processes = System.Diagnostics.Process.GetProcessesByName("iexplore");
Process iexplore = processes.First();
ShowWindow(iexplore.MainWindowHandle, ShowWindowCommands.Restore);
SetForegroundWindow(iexplore.MainWindowHandle);
var result = GetWindowRect(iexplore.MainWindowHandle, ref rect);
RectangleF rectF = new RectangleF()
{
Location = new PointF(rect.Left, rect.Top),
Size = new SizeF(rect.Right - rect.Left + 1, rect.Bottom - rect.Top + 1)
};
var bmp = new Bitmap((int)rectF.Width, (int)rectF.Height);
Graphics graphics = Graphics.FromImage(bmp);
graphics.CopyFromScreen((int)rectF.Left, (int)rectF.Top, 0, 0, new Size((int)rectF.Width, (int)rectF.Height), CopyPixelOperation.SourceCopy);
bmp.Save(@"C:\temp\screenshot1.jpg", ImageFormat.Jpeg);
}
}
enum ShowWindowCommands
{
Hide = 0,
Normal = 1,
ShowMinimized = 2,
Maximize = 3,
ShowMaximized = 3,
ShowNoActivate = 4,
Show = 5,
Minimize = 6,
ShowMinNoActive = 7,
ShowNA = 8,
Restore = 9,
ShowDefault = 10,
ForceMinimize = 11
}
[StructLayout(LayoutKind.Sequential)]
public struct RECT
{
public int Left;
public int Top;
public int Right;
public int Bottom;
}