private static async Task Read(AsyncFileStream stream, byte[] buffer, int offset, int count)
{
int remaining = count;
while (remaining > 0)
{
int read = await stream.ReadAsync(buffer, offset, remaining);
XAssert.AreNotEqual(0, read, "Unexpected EOF");
remaining -= read;
offset += read;
}
}
public async Task <BitmapImage> ReadImageAsync(string path)
{
logger.Info("Do ReadImageAsync:" + path);
using (AsyncFileStream afs = new AsyncFileStream(path, FileMode.Open, FileAccess.Read))
{
byte[] buffer = new byte[afs.Length];
await afs.ReadAsync(buffer, 0, (int)afs.Length); // 图片不能超过4G
var bitmapImage = new BitmapImage();
bitmapImage.BeginInit();
bitmapImage.StreamSource = new MemoryStream(buffer);
bitmapImage.EndInit();
return(bitmapImage);
}
}