我目前正在尝试使用 Visual C# 打印活动窗口的屏幕。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);
}
但此代码也捕获了 SaveImageDialog。有办法解决这个问题吗？多谢。
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，如果单击“确定”关闭对话框，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您的表单。如果您想保留代码的结构，您需要给它一些时间来处理待处理的事件，可能通过调用应用程序.DoEvents.
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