C# 如何在Winforms中将Bing地图图像的屏幕截图复制到剪贴板?
在我的winforms应用程序中,我希望允许用户将Bing地图组件的屏幕截图复制到剪贴板(至少) 我从中找到了下面的代码,它超越了这一点,但它不适合我编译C# 如何在Winforms中将Bing地图图像的屏幕截图复制到剪贴板?,c#,winforms,screenshot,bing-maps,C#,Winforms,Screenshot,Bing Maps,在我的winforms应用程序中,我希望允许用户将Bing地图组件的屏幕截图复制到剪贴板(至少) 我从中找到了下面的代码,它超越了这一点,但它不适合我编译 SaveScreenshot(this.userControl11.myMap, "MapScreenshot.png"); // code in menu item click handler private async void SaveScreenshot(FrameworkElement captureSourc
SaveScreenshot(this.userControl11.myMap, "MapScreenshot.png"); // code in menu item click handler
private async void SaveScreenshot(FrameworkElement captureSource, string suggestedName)
{
//Create a FileSavePicker.
var savePicker = new Windows.Storage.Pickers.FileSavePicker()
{
DefaultFileExtension = ".png",
SuggestedFileName = suggestedName,
SuggestedStartLocation = Windows.Storage.Pickers.PickerLocationId.PicturesLibrary
};
savePicker.FileTypeChoices.Add(".png", new System.Collections.Generic.List<string> { ".png" });
//Prompt the user to select a file.
var saveFile = await savePicker.PickSaveFileAsync();
//Verify the user selected a file.
if (saveFile != null)
{
using (var fileStream = await saveFile.OpenAsync(Windows.Storage.FileAccessMode.ReadWrite))
{
//Capture the screenshot and save it to the file stream.
await ScreenshotToStreamAsync(captureSource, fileStream);
}
}
}
private async Task ScreenshotToStreamAsync(FrameworkElement element, IRandomAccessStream stream)
{
var renderTargetBitmap = new Windows.UI.Xaml.Media.Imaging.RenderTargetBitmap();
await renderTargetBitmap.RenderAsync(element);
var pixelBuffer = await renderTargetBitmap.GetPixelsAsync();
var dpi = Windows.Graphics.Display.DisplayInformation.GetForCurrentView().LogicalDpi;
var encoder = await BitmapEncoder.CreateAsync(BitmapEncoder.PngEncoderId, stream);
encoder.SetPixelData(
BitmapPixelFormat.Bgra8,
BitmapAlphaMode.Ignore,
(uint)renderTargetBitmap.PixelWidth,
(uint)renderTargetBitmap.PixelHeight,
dpi,
dpi,
pixelBuffer.ToArray());
await encoder.FlushAsync();
}
所以我发现,这表明我需要的“使用”是使用Windows.Storage.Streams
…但当我添加此项时,我被告知无法找到“Windows”命名空间:
1>C:\Users\bclay\source\repos\MyMaps\MyMaps\Form1.cs(8,7,8,14): error CS0246: The type or namespace name 'Windows' could not be found (are you missing a using directive or an assembly reference?)
我需要做什么/更改/添加什么才能让它在Winforms上工作?还是我的情况需要一种完全不同的方法?有几种方法可以做到这一点 作为一个简单(但绝对不是完美)的选项,您可以使用将屏幕复制到图形对象:
var r = elementHost1.ClientRectangle;
using (var img = new Bitmap(r.Width, r.Height))
{
using (var g = Graphics.FromImage(img))
{
var sr = elementHost1.RectangleToScreen(r);
g.CopyFromScreen(sr.Location, System.Drawing.Point.Empty, sr.Size);
}
System.Windows.Forms.Clipboard.SetImage(img);
}
另一个选项是使用和将其导出到图像,如下所示:
public System.Drawing.Image DrawToImage(
System.Windows.Controls.Control target)
{
var rtb = new System.Windows.Media.Imaging.RenderTargetBitmap(
(int)(target.ActualWidth), (int)(target.ActualHeight),
96, 96, System.Windows.Media.PixelFormats.Pbgra32);
rtb.Render(target);
System.Windows.Media.Imaging.PngBitmapEncoder encoder =
new System.Windows.Media.Imaging.PngBitmapEncoder();
encoder.Frames.Add(System.Windows.Media.Imaging.BitmapFrame.Create(rtb));
var ms = new System.IO.MemoryStream();
encoder.Save(ms);
return System.Drawing.Image.FromStream(ms);
}
然后可以将其设置到剪贴板中:
using (var image = DrawToImage(userControl11.myMap))
System.Windows.Forms.Clipboard.SetImage(image);
或将其保存到文件:
using (var image = DrawToImage(userControl11.myMap))
image.Save(@"c:\test\map.png", System.Drawing.Imaging.ImageFormat.Png);
UWP应用程序可以使用
Windows.Storage.Streams
命名空间。选择器也是如此。您可以使用RenderTargetBitmap
渲染地图对象的DrawingVisual,向UserControl添加一个内部方法(可能对WPF使用Bing地图控件,但对WinForms没有),并返回位图源或将其转换为位图。顺便说一句,ElementHost有一个DrawToBitmap
方法。也许它可以呈现内容(我从来没有在Bing地图上使用过它,所以我不知道它是否会做任何事情或任何好事)。是的,我正在使用WPF Bing地图控件。完美!我使用了第二个选项并将其粘贴到剪贴板中。谢谢
using (var image = DrawToImage(userControl11.myMap))
image.Save(@"c:\test\map.png", System.Drawing.Imaging.ImageFormat.Png);