Liam O'Conor
asked on
Streamed file from StreamedFileDataRequest
private void FileDataRequest(StreamedFileDataRequest r)
{
MemoryStream m = new MemoryStream();
r = m.AsOutputStream as StreamedFileDataRequest;
}
void loop(){
StorageLibrary l = await StorageLibrary.GetLibraryAsync(FromKnownId.Pictures);
Scrollviewer scrollviewer = new Scrollviewer();
RenderTargetBitmap r = null;
r = new RenderTargetBitmap();
await r.RenderAsync(scrollviewer);
var file0 = await l.SaveFolder.CreateFileAsync("poikidiki");
await FileIO.WriteBufferAsync(file0, await r.GetPixelsAsync());
Windows.Storage.Streams.IRandomAccessStream b = await file0.OpenAsync(FileAccessMode.ReadWrite);
var file = await StorageFile.CreateStreamedFileAsync("effort06.jpg", new StreamedFileDataRequestedHandler(FileDataRequest),Windows.Storage.Streams.RandomAccessStreamReference.CreateFromFile(file0));
await file.CopyAsync(l.SaveFolder);
}it doesn't copy the bytes to the streamed file.
help appreciated
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ASKER
this is the full code with the issue in the underlined sentence:
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices.WindowsRuntime;
using Windows.Foundation;
using Windows.Foundation.Collections;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Primitives;
using Windows.UI.Xaml.Data;
using Windows.UI.Xaml.Input;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Navigation;
using Windows.Storage;
using Windows.UI.Xaml.Media.Imaging;
using Windows.UI.Xaml.Media.Animation;
using Windows.Graphics.Imaging;
using Windows.UI;
// The Blank Page item template is documented at https://go.microsoft.com/fwlink/?LinkId=402352&clcid=0x409
namespace New_Photo_Viewer
{
/// <summary>
/// An empty page that can be used on its own or navigated to within a Frame.
/// </summary>
public sealed partial class MainPage : Page
{
StorageLibrary l = null;
IStorageFile f = null;
BitmapImage b = null;
Stream s = null;
Storyboard story = new Storyboard();
DoubleAnimation anim = new DoubleAnimation();
BitmapDecoder d = null;
BitmapEncoder en = null;
List<Color> colors = new List<Color>();
int position = 0;
IStorageFile fip = null;
Windows.UI.Xaml.Media.Imaging.RenderTargetBitmap r = null;
double degrees = 0;
int focus = 0;
int horizontaloffset = 0;
int verticaloffset = 0;
byte[] bytes = new byte[Convert.ToInt32(Math.Pow(2,16))];
bool StartFilling = false;
MemoryStream m = new MemoryStream();
public MainPage()
{
this.InitializeComponent();
this.Loading += MainPage_Loading;
this.KeyDown += MainPage_KeyDown;
this.RightTapped += MainPage_RightTapped;
listview.SelectionChanged += Listview_SelectionChanged;
listbox.SelectionChanged += Listbox_SelectionChanged;
listview.Items.Add("Zoom In");
listview.Items.Add("Zoom Out");
listview.Items.Add("Play Projection");
listview.Items.Add("Stop Projection");
listview.Items.Add("Get Items");
listview.Items.Add("Set flow direction from right to left");
listview.Items.Add("Set flow direction from left to right");
listview.Items.Add("Start Changing Backround");
listview.Items.Add("Stop Changing Backround");
listview.Items.Add("Validate image");
horizontaloffset = Convert.ToInt32(image.Width / 2);
verticaloffset = Convert.ToInt32(image.Height / 2);
colors.Add(Colors.Yellow);
colors.Add(Colors.GreenYellow);
colors.Add(Colors.Yellow);
colors.Add(Colors.Gold);
colors.Add(Colors.Gray);
colors.Add(Colors.White);
colors.Add(Colors.Black);
colors.Add(Colors.Pink);
listview.Visibility = Visibility.Collapsed;
data.Visibility = Visibility.Collapsed;
slider.ValueChanged += Slider_ValueChanged;
slider.Maximum = 4;
slider.Minimum = 0;
slider.Visibility = Visibility.Collapsed;
data.DoubleTapped += Data_DoubleTapped;
heighttb.Visibility = Visibility.Collapsed;
widthtb.Visibility = Visibility.Collapsed;
heighttextbox.Visibility = Visibility.Collapsed;
widthtextbox.Visibility = Visibility.Collapsed;
}
private void FileDataRequest(StreamedFileDataRequest r)
{
MemoryStream m = new MemoryStream();
r = m.AsOutputStream() as StreamedFileDataRequest;
}
private void MainPage_KeyDown(object sender, KeyRoutedEventArgs e)
{
if (e.Key == Windows.System.VirtualKey.Escape)
{
heighttb.Visibility = Visibility.Visible;
heighttextbox.Visibility = Visibility.Visible;
widthtb.Visibility = Visibility.Visible;
widthtextbox.Visibility = Visibility.Visible;
}
if (e.Key == Windows.System.VirtualKey.Insert)
{
if (position < colors.Count)
{
position += 1;
scrollviewer.Background = new SolidColorBrush(colors[position]);
}
if (position == colors.Count)
{
position = 0;
scrollviewer.Background = new SolidColorBrush(colors[position]);
}
}
if (e.Key == Windows.System.VirtualKey.Delete)
{
if (position > 0)
{
position -= 1;
scrollviewer.Background = new SolidColorBrush(colors[position]);
}
if (position == 0)
{
position = colors.Count;
scrollviewer.Background = new SolidColorBrush(colors[position]);
}
}
}
private void Data_DoubleTapped(object sender, DoubleTappedRoutedEventArgs e)
{
data.Visibility = Visibility.Collapsed;
}
private void Slider_ValueChanged(object sender, RangeBaseValueChangedEventArgs e)
{
int focus = Convert.ToInt32(e.NewValue);
scrollviewer.ChangeView(-150,-150, focus);
slider.Visibility = Visibility.Collapsed;
}
private async void Listbox_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
b = new BitmapImage();
f = await l.SaveFolder.GetFileAsync(listbox.SelectedValue.ToString());
s = await f.OpenStreamForReadAsync();
b.SetSource(s.AsRandomAccessStream());
d = await BitmapDecoder.CreateAsync(s.AsRandomAccessStream());
en = await BitmapEncoder.CreateForTranscodingAsync(s.AsRandomAccessStream(), d);
image.Source = b;
}
private async void Listview_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
if (listview.SelectedItem == listview.Items[0])
{
slider.Visibility = Visibility.Visible;
listview.Visibility = Visibility.Collapsed;
listview.SelectedItem = null;
}
if (listview.SelectedItem == listview.Items[1])
{
slider.Visibility = Visibility.Visible;
listview.Visibility = Visibility.Collapsed;
listview.SelectedItem = null;
}
if (listview.SelectedItem == listview.Items[2])
{
listbox.Visibility = Visibility.Collapsed;
this.RequestedTheme = ElementTheme.Dark;
listview.Visibility = Visibility.Collapsed;
listview.SelectedItem = null;
}
if (listview.SelectedItem == listview.Items[3])
{
this.RequestedTheme = ElementTheme.Light;
image.Arrange(new Rect(listbox.Width, 0, image.Width, image.Height));
listbox.Visibility = Visibility.Visible;
listview.Visibility = Visibility.Collapsed;
listview.SelectedItem = null;
}
if (listview.SelectedItem == listview.Items[4])
{
data.Visibility = Visibility.Visible;
data.Items.Clear();
data.Items.Add("Horizontal resolution:" + d.DpiX);
data.Items.Add("Vertical resolution:" + d.DpiY);
data.Items.Add("Pixel Height:" + b.PixelHeight);
data.Items.Add("Pixel Width" + b.PixelWidth);
data.Items.Add("Animated Bitmap" + b.IsAnimatedBitmap);
data.Items.Add("Byte Size:" + s.Length);
data.Items.Add("Source:" + image.Source);
listview.Visibility = Visibility.Collapsed;
listview.SelectedItem = null;
}
if(listview.SelectedItem == listview.Items[5])
{
scrollviewer.FlowDirection = FlowDirection.RightToLeft;
listview.Visibility = Visibility.Collapsed;
listview.SelectedItem = null;
}
if (listview.SelectedIndex == 6)
{
scrollviewer.FlowDirection = FlowDirection.LeftToRight;
listview.Visibility = Visibility.Collapsed;
listview.SelectedItem = null;
}
if (listview.SelectedIndex == 7)
{
StartFilling = true;
listview.Visibility = Visibility.Collapsed;
listview.SelectedItem = null;
}
if (listview.SelectedIndex == 8)
{
StartFilling = false;
listview.Visibility = Visibility.Collapsed;
listview.SelectedItem = null;
}
if (listview.SelectedIndex == 9)
{
r = new RenderTargetBitmap();
await r.RenderAsync(scrollviewer);
image.Source = r;
var file0 = await l.SaveFolder.CreateFileAsync("poikidiki");
await FileIO.WriteBufferAsync(file0, await r.GetPixelsAsync());
Windows.Storage.Streams.IRandomAccessStream b = await file0.OpenAsync(FileAccessMode.ReadWrite);
[u] var file = await StorageFile.CreateStreamedFileAsync("effort06.jpg", new StreamedFileDataRequestedHandler(FileDataRequest),Windows.Storage.Streams.RandomAccessStreamReference.CreateFromFile(file0));
[/u]
await file.CopyAsync(l.SaveFolder);
listview.Visibility = Visibility.Collapsed;
listview.SelectedItem = null;
}
}
private void MainPage_RightTapped(object sender, RightTappedRoutedEventArgs e)
{
listview.Visibility = Visibility.Visible;
}
private async void MainPage_Loading(FrameworkElement sender, object args)
{
l = await StorageLibrary.GetLibraryAsync(KnownLibraryId.Pictures);
foreach(var file in await l.SaveFolder.GetFilesAsync())
{
listbox.Items.Add(file.Name);
}
}
}
}ASKER
I have worked it out that the issue is in the StreamedFileDataRequest
ASKER