WPF：截取屏幕截图并保存
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WPF: Take a screenshot and save it
提问by Raya
I'm new to WPF applications and I've tried looking around to see if I could find something that works for this, but so far nothing I've found works (I guess it's because most of it is outdated). I want to take a screenshot of the entire desktop (i.e. all monitors) and save it as a .jpgto a specific folder with the time and date as the file name when I click the screenshot button. I was able to achieve this in my Windows Forms application, but haven't been able to do so with my WPF application.
我是 WPF 应用程序的新手，我试着环顾四周，看看我是否能找到适合这个的东西，但到目前为止我没有发现任何有用的东西（我想这是因为大部分已经过时了）。我想截取整个桌面（即所有显示器）的屏幕截图并将其保存.jpg到特定文件夹中，当我单击屏幕截图按钮时，将时间和日期作为文件名。我能够在我的 Windows 窗体应用程序中实现这一点，但我的 WPF 应用程序无法做到这一点。
This is the code that I used for my Windows Forms application.
这是我用于 Windows 窗体应用程序的代码。
int screenLeft = SystemInformation.VirtualScreen.Left;
int screenTop = SystemInformation.VirtualScreen.Top;
int screenWidth = SystemInformation.VirtualScreen.Width;
int screenHeight = SystemInformation.VirtualScreen.Height;
using (Bitmap bmp = new Bitmap(screenWidth, screenHeight))
{
using (Graphics g = Graphics.FromImage(bmp))
{
String filename = "ScreenCapture-" + DateTime.Now.ToString("ddMMyyyy-hhmmss") + ".png";
Opacity = .0;
g.CopyFromScreen(screenLeft, screenTop, 0, 0, bmp.Size);
bmp.Save("C:\ScreenShots\" + filename);
Opacity = 1;
}
}
Any help would be appreciated.
任何帮助，将不胜感激。
回答by fillobotto
In WPF project, you have to manually add reference to System.Drawing.dlllibrary. To do so, Project > Add reference > Assembly tab (Framework) > check the desired library.
在 WPF 项目中，您必须手动添加对System.Drawing.dll库的引用。为此，项目 > 添加引用 > 装配选项卡（框架）> 检查所需的库。
Moreover your code needs just a bit of tweaking, but the idea it's correct.
此外，您的代码只需要一点点调整，但它的想法是正确的。
double screenLeft = SystemParameters.VirtualScreenLeft;
double screenTop = SystemParameters.VirtualScreenTop;
double screenWidth = SystemParameters.VirtualScreenWidth;
double screenHeight = SystemParameters.VirtualScreenHeight;
using (Bitmap bmp = new Bitmap((int)screenWidth,
(int)screenHeight))
{
using (Graphics g = Graphics.FromImage(bmp))
{
String filename = "ScreenCapture-" + DateTime.Now.ToString("ddMMyyyy-hhmmss") + ".png";
Opacity = .0;
g.CopyFromScreen((int)screenLeft, (int)screenTop, 0, 0, bmp.Size);
bmp.Save("C:\Screenshots\" + filename);
Opacity = 1;
}
}
