public static async Task <InMemoryRandomAccessStream> ConvertByteToRandomAccessStream(byte[] arr)
{
InMemoryRandomAccessStream randomAccessStream = new InMemoryRandomAccessStream();
await randomAccessStream.WriteAsync(arr.AsBuffer());
randomAccessStream.Seek(0); // Just to be sure.
// I don't think you need to flush here, but if it doesn't work, give it a try.
return(randomAccessStream);
}
static async ValueTask <ImageSource?> FetchImageAsync(Uri url)
{
var raStream = new InMemoryRandomAccessStream();
await raStream.WriteAsync((await Reddit.FetchImageAsync(url)).AsBuffer());
raStream.Seek(0);
var bitmap = new BitmapImage();
await bitmap.SetSourceAsync(raStream);
return(bitmap);
}
async void SetImageSource()
{
InMemoryRandomAccessStream stream = new InMemoryRandomAccessStream();
await stream.WriteAsync(ImageData.AsBuffer());
stream.Seek(0);
imageSource = new BitmapImage();
imageSource.SetSource(stream);
}
/// <summary>
/// Convert byte[] to bitmap image
/// </summary>
private void ByteToBitmap()
{
if (_flag == null)
_flag = new BitmapImage();
using InMemoryRandomAccessStream stream = new InMemoryRandomAccessStream();
_ = stream.WriteAsync(FlagByte.AsBuffer());
stream.Seek(0);
_ = _flag.SetSourceAsync(stream);
}
///<summary>
///<para>Переделывает биты под картинку для отображения в проге</para>
///</summary>
public static async Task <BitmapImage> ByteToImage(byte[] byteArray)
{
var bitmapImage = new BitmapImage();
var stream = new InMemoryRandomAccessStream();
await stream.WriteAsync(byteArray.AsBuffer());
stream.Seek(0);
bitmapImage.SetSource(stream);
return(bitmapImage);
}
public static async Task <BitmapSource> LoadImageAsync(byte[] buffer)
{
using (var stream = new InMemoryRandomAccessStream())
{
await stream.WriteAsync(buffer.AsBuffer());
stream.Seek(0);
return(await LoadImageAsync(stream));
}
}
public override async Task <IRandomAccessStream> GetStreamAsync()
{
var content = await Client.DownloadAsync(Photo.Source).ConfigureAwait(false);
var stream = new InMemoryRandomAccessStream();
await stream.WriteAsync(content).AsTask().ConfigureAwait(false);
Ready(this, stream);
return(stream);
}
async void SetImageSource()
{
InMemoryRandomAccessStream stream = new InMemoryRandomAccessStream();
await stream.WriteAsync(ImageData.AsBuffer());
stream.Seek(0);
imageSource = new BitmapImage();
imageSource.SetSource(stream);
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("ImageSource"));
}
private async Task InitializeWebView2()
{
var environment = await CoreWebView2Environment.CreateAsync();
await _webview.EnsureCoreWebView2Async(environment);
ApplyDefaultWebViewSettings();
_webview.CoreWebView2.AddWebResourceRequestedFilter($"{AppOrigin}*", CoreWebView2WebResourceContext.All);
_webview.CoreWebView2.WebResourceRequested += (sender, eventArgs) =>
{
// Unlike server-side code, we get told exactly why the browser is making the request,
// so we can be smarter about fallback. We can ensure that 'fetch' requests never result
// in fallback, for example.
var allowFallbackOnHostPage =
eventArgs.ResourceContext == CoreWebView2WebResourceContext.Document ||
eventArgs.ResourceContext == CoreWebView2WebResourceContext.Other; // e.g., dev tools requesting page source
if (TryGetResponseContent(eventArgs.Request.Uri, allowFallbackOnHostPage, out var statusCode, out var statusMessage, out var content, out var headers))
{
// NOTE: This is stream copying is to work around a hanging bug in WinRT with managed streams
var memStream = new MemoryStream();
content.CopyTo(memStream);
var ms = new InMemoryRandomAccessStream();
ms.WriteAsync(memStream.GetWindowsRuntimeBuffer()).AsTask().Wait();
var headerString = GetHeaderString(headers);
eventArgs.Response = environment.CreateWebResourceResponse(ms, statusCode, statusMessage, headerString);
}
};
// The code inside blazor.webview.js is meant to be agnostic to specific webview technologies,
// so the following is an adaptor from blazor.webview.js conventions to WebView2 APIs
await _webview.CoreWebView2 !.AddScriptToExecuteOnDocumentCreatedAsync(@"
window.external = {
sendMessage: message => {
window.chrome.webview.postMessage(message);
},
receiveMessage: callback => {
window.chrome.webview.addEventListener('message', e => callback(e.data));
}
};
");
_webview.CoreWebView2.WebMessageReceived += (sender, eventArgs)
=> MessageReceived(new Uri(eventArgs.Source), eventArgs.TryGetWebMessageAsString());
_webview.CoreWebView2.DOMContentLoaded += async(_, __) =>
{
await _webview.CoreWebView2 !.ExecuteScriptAsync(@"
Blazor.start();
" );
};
}
private async Task LoadTileImageAsync(Tile tile, IBuffer buffer)
{
using (var stream = new InMemoryRandomAccessStream())
{
await stream.WriteAsync(buffer);
stream.Seek(0);
await SetTileImageAsync(tile, () => ImageLoader.LoadImageAsync(stream)).ConfigureAwait(false);
}
}
public static async Task SetSourceAsync(this BitmapImage image, byte[] buffer)
{
using (var stream = new InMemoryRandomAccessStream())
{
await stream.WriteAsync(buffer.AsBuffer());
stream.Seek(0);
await image.SetSourceAsync(stream);
}
}
async void LoadImageAsync(Product product)
{
ImageSource = new Image();
using (var stream = new InMemoryRandomAccessStream())
{
await stream.WriteAsync(product.Image.AsBuffer());
stream.Seek(0);
await ImageSource.SetSourceAsync(stream);
}
}
public static BitmapImage AsBitmapImage(this byte[] byteArray)
{
using (var stream = new InMemoryRandomAccessStream())
{
stream.WriteAsync(byteArray.AsBuffer()).GetResults();
stream.Seek(0);
BitmapImage bmp = new BitmapImage();
bmp.SetSource(stream);
return(bmp);
}
}
private async Task LoadPendingTiles(TileSource tileSource, string sourceName)
{
PendingTile pendingTile;
var cache = Cache;
if (cache == null || sourceName == null)
{
while (pendingTiles.TryDequeue(out pendingTile))
{
await DownloadImage(pendingTile.Tile, pendingTile.Image, pendingTile.Uri, null);
}
}
else
{
while (pendingTiles.TryDequeue(out pendingTile))
{
var tile = pendingTile.Tile;
var image = pendingTile.Image;
var uri = pendingTile.Uri;
var extension = Path.GetExtension(uri.LocalPath);
if (string.IsNullOrEmpty(extension) || extension == ".jpeg")
{
extension = ".jpg";
}
var cacheKey = string.Format(@"{0}\{1}\{2}\{3}{4}", sourceName, tile.ZoomLevel, tile.XIndex, tile.Y, extension);
var cacheItem = await cache.GetAsync(cacheKey);
var loaded = false;
if (cacheItem == null || cacheItem.Expiration <= DateTime.UtcNow)
{
loaded = await DownloadImage(tile, image, uri, cacheKey);
}
if (!loaded && cacheItem != null && cacheItem.Buffer != null)
{
using (var stream = new InMemoryRandomAccessStream())
{
await stream.WriteAsync(cacheItem.Buffer);
await stream.FlushAsync();
stream.Seek(0);
await LoadImageFromStream(tile, image, stream);
}
}
}
}
Interlocked.Decrement(ref taskCount);
}
protected override async Task <ImageSource> LoadImage(bool removeCache, CancellationToken token)
{
using var stream = new InMemoryRandomAccessStream();
await stream.WriteAsync(_data.AsBuffer());
stream.Seek(0);
var bitmap = new BitmapImage();
await bitmap.SetSourceAsync(stream);
return(bitmap);
}
private async void ConvertToBitmapImage()
{
Cover = new BitmapImage();
using (InMemoryRandomAccessStream stream = new InMemoryRandomAccessStream())
{
await stream.WriteAsync(CoverBytes.AsBuffer());
stream.Seek(0);
await Cover.SetSourceAsync(stream);
}
}
public void newAvatar(byte[] newAvatar)
{
using (var stream = new InMemoryRandomAccessStream())
{
stream.WriteAsync(new MyBuffer(newAvatar).Buffer).AsTask().GetAwaiter().GetResult();
var x = new BitmapImage();
stream.Seek(0);
x.SetSource(stream);
this.Avatar = x;
}
}
/// <summary>
/// 异步从网络下载图片
/// </summary>
/// <param name="outfileName">下载保存到本地的图片文件名</param>
/// <param name="downloadUriString">图片uri</param>
/// <param name="scaleSize">图片尺寸</param>
/// <returns></returns>
public static async Task DownloadAndScale(string outfileName, string downloadUriString, Size scaleSize)
{
try
{
Uri downLoadingUri = new Uri(downloadUriString); //创建uri对象
HttpClient client = new HttpClient(); //实例化httpclient对象
using (var response = await client.GetAsync(downLoadingUri))
{
var buffer = await response.Content.ReadAsBufferAsync();//从返回的数据中读取buffer
var memoryStream = new InMemoryRandomAccessStream();
await memoryStream.WriteAsync(buffer); //将buffer写入memorystream
await memoryStream.FlushAsync(); //刷新
var decoder = await Windows.Graphics.Imaging.BitmapDecoder.CreateAsync(memoryStream); //解密文件流
//确定图片大小
var bt = new Windows.Graphics.Imaging.BitmapTransform();
bt.ScaledWidth = (uint)scaleSize.Width;
bt.ScaledHeight = (uint)scaleSize.Height;
//得到像素数值
var pixelProvider = await decoder.GetPixelDataAsync(
decoder.BitmapPixelFormat, decoder.BitmapAlphaMode, bt,
ExifOrientationMode.IgnoreExifOrientation, ColorManagementMode.ColorManageToSRgb);
//下面保存图片
// Now that we have the pixel data, get the destination file
var localFolder = ApplicationData.Current.LocalFolder;
//var resultsFolder = await localFolder.CreateFolderAsync("Results", CreationCollisionOption.OpenIfExists);
var scaledFile = await localFolder.CreateFileAsync(outfileName, CreationCollisionOption.ReplaceExisting);
using (var scaledFileStream = await scaledFile.OpenAsync(FileAccessMode.ReadWrite))
{
var encoder = await BitmapEncoder.CreateAsync(
BitmapEncoder.JpegEncoderId, scaledFileStream);
var pixels = pixelProvider.DetachPixelData();
encoder.SetPixelData(
decoder.BitmapPixelFormat,
decoder.BitmapAlphaMode,
(uint)scaleSize.Width,
(uint)scaleSize.Height,
decoder.DpiX,
decoder.DpiY,
pixels
);
await encoder.FlushAsync();
}
}
}
catch (Exception) { Debug.WriteLine("工具，图片异常"); }
}
public async void PrintUWpAsync(byte[] imageData)
{
int i = 0;
while (i < 5)
{
try
{
BitmapImage biSource = new BitmapImage();
using (InMemoryRandomAccessStream stream = new InMemoryRandomAccessStream())
{
await stream.WriteAsync(imageData.AsBuffer());
stream.Seek(0);
await biSource.SetSourceAsync(stream);
}
ViewToPrint.Source = biSource;
if (PrintDoc != null)
{
printDoc.GetPreviewPage -= PrintDoc_GetPreviewPage;
printDoc.Paginate -= PrintDoc_Paginate;
printDoc.AddPages -= PrintDoc_AddPages;
}
this.printDoc = new PrintDocument();
try
{
printDoc.GetPreviewPage += PrintDoc_GetPreviewPage;
printDoc.Paginate += PrintDoc_Paginate;
printDoc.AddPages += PrintDoc_AddPages;
bool showprint = await PrintManager.ShowPrintUIAsync();
}
catch (Exception e)
{
Debug.WriteLine(e.ToString());
}
// printmgr = null;
// printDoc = null;
// Task = null;
PrintDoc = null;
GC.Collect();
printmgr.PrintTaskRequested -= Printmgr_PrintTaskRequested;
break;
}
catch (Exception e)
{
i++;
}
}
}
public static BitmapImage ImageFromBytes(Byte[] bytes)
{
BitmapImage image = new BitmapImage();
using (InMemoryRandomAccessStream stream = new InMemoryRandomAccessStream())
{
stream.WriteAsync(bytes.AsBuffer());
stream.Seek(0);
image.SetSourceAsync(stream);
}
return(image);
}
/// <summary>
/// 初始化 CanvasBitmap.
/// </summary>
private async Task InitCanvasBitmap()
{
using (var stream = new InMemoryRandomAccessStream()) {
var buffer = this.ImageByteString.ToByteArray().AsBuffer();
await stream.WriteAsync(buffer);
stream.Seek(0);
var bitmap = await CanvasBitmap.LoadAsync(this.Stage, stream);
this.CanvasBitmap = bitmap;
}
}
public static async Task <BitmapImage> ImageFromBuffer(IBuffer buffer)
{
var image = new BitmapImage();
using (var stream = new InMemoryRandomAccessStream()) {
stream.Seek(0);
await stream.WriteAsync(buffer);
await image.SetSourceAsync(stream);
}
return(image);
}
public static BitmapImage ToOperatorImage(this string value)
{
byte[] array = (byte[])Resources.Resource.ResourceManager.GetObject($"operator_{value}");
using (var stream = new InMemoryRandomAccessStream())
{
stream.WriteAsync(array.AsBuffer()).GetResults();
stream.Seek(0);
BitmapImage bmp = new BitmapImage();
bmp.SetSource(stream);
return(bmp);
}
}
public static async Task <BitmapImage> ByteArrayToImageAsync(byte[] pixeByte)
{
using (InMemoryRandomAccessStream stream = new InMemoryRandomAccessStream())
{
BitmapImage image = new BitmapImage();
await stream.WriteAsync(pixeByte.AsBuffer());
stream.Seek(0);
image.SetSource(stream);
return(image);
}
}
public override async Task <IRandomAccessStream> GetStreamAsync()
{
var file = await StorageFile.GetFileFromApplicationUriAsync(Photo.Source);
var content = await FileIO.ReadBufferAsync(file);
var stream = new InMemoryRandomAccessStream();
await stream.WriteAsync(content).AsTask().ConfigureAwait(false);
Ready(this, stream);
return(stream);
}
public void SetResponse(Stream content, int statusCode, string statusMessage, string headerString)
{
// NOTE: This is stream copying is to work around a hanging bug in WinRT with managed streams
var memStream = new MemoryStream();
content.CopyTo(memStream);
var ms = new InMemoryRandomAccessStream();
ms.WriteAsync(memStream.GetWindowsRuntimeBuffer()).AsTask().Wait();
_webResourceRequestedEventArgs.Response = _environment.CreateWebResourceResponse(ms, statusCode, statusMessage, headerString);
}
private async void mediaItemClicked(object sender, PointerRoutedEventArgs e)
{
if (sender is StackPanel)
{
StackPanel sp = sender as StackPanel;
if (sp.DataContext is MediaItem)
{
meMainMediaPlayer.Visibility = Visibility.Collapsed;
imgSelectedMedia.Visibility = Visibility.Collapsed;
MediaItem mi = sp.DataContext as MediaItem;
if (mi.rawStorageFile.FileType == ".jpg" || mi.rawStorageFile.FileType == ".jpeg")
{
imgSelectedMedia.Visibility = Visibility.Visible;
var bytes = await GetBtyeFromFileAsync(mi.rawStorageFile);
if (bytes != null)
{
//var stream = new MemoryStream(bytes);
var randomAccessStream = new InMemoryRandomAccessStream();
randomAccessStream.WriteAsync(bytes.AsBuffer());
randomAccessStream.Seek(0);
var bi = new BitmapImage();
bi.ImageFailed += (s, o) =>
{
// This event is optional and is used to let us know if something went wrong
var m = "Failure";
};
await bi.SetSourceAsync(randomAccessStream);
imgSelectedMedia.Source = bi;
}
}
else if (mi.rawStorageFile.FileType == ".wma" || mi.rawStorageFile.FileType == ".mp3")
{
meMainMediaPlayer.Visibility = Visibility.Visible;
var bytes = await GetBtyeFromFileAsync(mi.rawStorageFile);
if (bytes != null)
{
var randomAccessStream = new InMemoryRandomAccessStream();
randomAccessStream.WriteAsync(bytes.AsBuffer());
randomAccessStream.Seek(0);
meMainMediaPlayer.SetSource(randomAccessStream, mi.rawStorageFile.ContentType);
meMainMediaPlayer.Play();
meMainMediaPlayer.Volume = 0.5;
}
}
}
}
}
public async Task LoadPreviewAsync()
{
if (This.Preview != null)
{
using (var stream = new InMemoryRandomAccessStream())
{
await stream.WriteAsync(This.Preview.AsBuffer());
stream.Seek(0);
await Preview.SetSourceAsync(stream);
}
}
}
private async void LoadImage()
{
var image = new BitmapImage();
using (var stream = new InMemoryRandomAccessStream())
{
await stream.WriteAsync(CoverBytes.AsBuffer());
stream.Seek(0);
await image.SetSourceAsync(stream);
}
Cover = image;
}
private async void newAvatar(byte[] newAvatar)
{
using (var stream = new InMemoryRandomAccessStream())
{
await stream.WriteAsync(new MyBuffer(newAvatar).Buffer);
BitmapImage x = new BitmapImage();
stream.Seek(0);
await x.SetSourceAsync(stream);
this.Avatar = x;
}
}
/// <summary>
/// Converts the specified byte array to a <see cref="IRandomAccessStream" />.
/// </summary>
/// <param name="buffer"></param>
/// <returns></returns>
private static async Task<IRandomAccessStream> ConvertToRandomAccessStream(byte[] buffer)
{
//https://stackoverflow.com/questions/16397509/how-to-convert-byte-array-to-inmemoryrandomaccessstream-or-irandomaccessstream-i
var randomAccessStream = new InMemoryRandomAccessStream();
await randomAccessStream.WriteAsync(buffer.AsBuffer());
randomAccessStream.Seek(0);
return randomAccessStream;
}
