C＃打印屏幕活动窗口

我目前正在尝试使用Visual C＃打印一个活动窗口。 我有这个代码：

SaveFileDialog saveImageDialog = new SaveFileDialog(); saveImageDialog.Title = "Select output file:"; saveImageDialog.Filter = "JPeg Image|*.jpg|Bitmap Image|*.bmp|Gif Image|*.gif"; //saveImageDialog.FileName = printFileName; if (saveImageDialog.ShowDialog() == DialogResult.OK) { // Set the bitmap object to the size of the screen bmpScreenshot = new Bitmap(this.Bounds.Width, this.Bounds.Height, PixelFormat.Format32bppArgb); // Create a graphics object from the bitmap gfxScreenshot = Graphics.FromImage(bmpScreenshot); // Take the screenshot from the upper left corner to the right bottom corner gfxScreenshot.CopyFromScreen(this.Bounds.X, this.Bounds.Y, 0, 0, this.Bounds.Size, CopyPixelOperation.SourceCopy); // Save the screenshot to the specified path that the user has chosen bmpScreenshot.Save(saveImageDialog.FileName, ImageFormat.Png); } 

但是这段代码也捕获了SaveImageDialog。 有没有解决这个问题？ 非常感谢。

Answer 1

最简单的方法是切换代码：

 // Set the bitmap object to the size of the screen bmpScreenshot = new Bitmap(this.Bounds.Width, this.Bounds.Height, PixelFormat.Format32bppArgb); // Create a graphics object from the bitmap gfxScreenshot = Graphics.FromImage(bmpScreenshot); // Take the screenshot from the upper left corner to the right bottom corner gfxScreenshot.CopyFromScreen(this.Bounds.X, this.Bounds.Y, 0, 0, this.Bounds.Size, CopyPixelOperation.SourceCopy); SaveFileDialog saveImageDialog = new SaveFileDialog(); saveImageDialog.Title = "Select output file:"; saveImageDialog.Filter = "JPeg Image|*.jpg|Bitmap Image|*.bmp|Gif Image|*.gif"; //saveImageDialog.FileName = printFileName; if (saveImageDialog.ShowDialog() == DialogResult.OK) { // Save the screenshot to the specified path that the user has chosen bmpScreenshot.Save(saveImageDialog.FileName, ImageFormat.Png); } 

首先创建屏幕截图，然后显示保存对话框，如果对话框已关闭，则将其保存到光盘。

问题是，在您的代码中，程序没有时间重新绘制表单。 如果要保留代码的结构，则需要给它一些时间来处理挂起的事件，可能是通过调用Application.DoEvents 。