I am trying to play mp3 in my wp 8 app, i think forgot something, can you please help
my simplified code is as it goes:
in page.xaml.cs code is:
public void Play(object sender, RoutedEventArgs e)
{
if (PlayState.Playing == BackgroundAudioPlayer.Instance.PlayerState)
{
BackgroundAudioPlayer.Instance.Pause();
}
else
{
BackgroundAudioPlayer.Instance.Play();
}
}
in App.xaml.cs code is:
using (IsolatedStorageFile storage = IsolatedStorageFile.GetUserStoreForApplication())
{
string[] files = new string[] { "song.mp3"};
foreach (var _fileName in files)
{
if (!storage.FileExists(_fileName))
{
string _filePath = "Sounds/" + _fileName;
StreamResourceInfo resource = Application.GetResourceStream(new Uri(_filePath, UriKind.Relative));
using (IsolatedStorageFileStream file = storage.CreateFile(_fileName))
{
int chunkSize = 4096;
byte[] bytes = new byte[chunkSize];
int byteCount;
while ((byteCount = resource.Stream.Read(bytes, 0, chunkSize)) > 0)
{
file.Write(bytes, 0, byteCount);
}
}
}
}
}
}
i can see that my BackgroundAudioPlayer.Instancestate never changes, but I can't figure out why (play function is trigered)
You need to tell the BackgroundAudioPlayer which track to play.
Something like:
var track = new AudioTrack(
new Uri("/song.mp3", UriKind.Relative),
"song name",
"artist name",
"album name",
null); // no artwork
BackgroundAudioPlayer.Instance.Track = track;
BackgroundAudioPlayer.Instance.Play();
Related
For some reason File.ReadLines keeps the file that im reading locked, and when i am trying to write text into it using a streamWriter, i get an error that it is being used by another process. If i don't read it first, writing into it works fine. Here is my code:
IEnumerable<String> lines;
private void loadCfg()
{
lines = File.ReadLines(Application.StartupPath + #"\server.cfg");
foreach (var line in lines)
{
if (line.Contains("Port"))
{
portTxtBox.Text = extractValue(line);
}
if (line.Contains("Cars"))
{
maxCarsCombo.Text = extractValue(line);
}
if (line.Contains("MaxPlayers"))
{
maxPlayerCombo.Text = extractValue(line);
}
}
}
private void saveBtn_Click(object sender, EventArgs e)
{
StreamWriter sw = new StreamWriter(Application.StartupPath + #"\server.cfg",false);
sw.WriteLine(lines.ElementAt(0));
sw.Close();
}
Well you should read all the lines using StreamReader class that way your file will be properly closed I altered the way you are reading lines to read all lines using StreamReader try the following version
List<string> lines = new List<string>()
private void loadCfg()
{
string temp = null;
StreamReader rd = new StreamReader(Application.StartupPath + #"\server.cfg");
temp = rd.ReadLine();
while(temp != null)
{
lines.Add(temp);
temp = rd.ReadLine();
}
rd.Close();
foreach (var line in lines)
{
if (line.Contains("Port"))
{
portTxtBox.Text = extractValue(line);
}
if (line.Contains("Cars"))
{
maxCarsCombo.Text = extractValue(line);
}
if (line.Contains("MaxPlayers"))
{
maxPlayerCombo.Text = extractValue(line);
}
}
}
private void saveBtn_Click(object sender, EventArgs e)
{
StreamWriter sw = new StreamWriter(Application.StartupPath + #"\server.cfg",false);
sw.WriteLine(lines.ElementAt(0));
sw.Close();
}
I have not tested the code but I am sure it will solve your problem
So, i have a function that will load an image from disk async in an other thread ( big images will be loaded and I don't want the UI THread to be locked while loading).
Loading is done like this
public override void LoadFile()
{
using (var imageStream = new FileStream(_filePath, FileMode.Open, FileAccess.Read, FileShare.Read))
{
Decoder = new TiffBitmapDecoder(imageStream, BitmapCreateOptions.PreservePixelFormat, BitmapCacheOption.OnLoad);
InitializeFile();
}
}
Then I want to use the Decoder on the main thread
public List<ThumbnailModel> LoadPages()
{
var result = new List<ThumbnailModel>();
foreach (var frame in Decoder.Frames) <--// this line throws exception
{
result.Add(new ThumbnailModel
{
Name = _metadataLoader.GetPageName((BitmapMetadata)frame.Metadata),
Bitmap = new WriteableBitmap(frame)
});
}
return result;
}
Now here is the problem, whenever I reach the line where I try to access the Decoder.Frames it throws exception (The calling thread cannot access this object because a different thread owns it.)
Is there a way I can use my Decoder in the main thread if not, the only possible solution is to load all the image information in the other thread?
Full code version :
// this is the task, that calls the imageFactory LoadFile method - NewThread
private async Task OpenFileAsync(string strFilePath)
{
var newFile = _imageFileFactory.LoadFile(strFilePath);
if (newFile != null)
{
_imagefile = newFile;
}
}
//image factory load file - NewThread
public IImageFile LoadFile(string filePath)
{
if (string.IsNullOrWhiteSpace(filePath))
{
return null;
}
var fileExtension = Path.GetExtension(filePath); // .tiff or .jpeg
var file = new ImageFileTiff(filePath, _metatadaFactory, _metadataVersioner);
file.LoadFile();
return file;
}
// ImageFileTiff LoadFile will create a decoder - NewThread
public override void LoadFile()
{
using (var imageStream = new FileStream(_filePath, FileMode.Open, FileAccess.Read, FileShare.Read))
{
Decoder = new JpegBitmapDecoder(imageStream, BitmapCreateOptions.PreservePixelFormat, BitmapCacheOption.OnLoad);
InitializeFile();
}
}
After we have an IImageFile we call on MainThread(UIThread)
var pages = _imagefile.LoadPages();
Where LoadPages is the place where the app breaks. also called on UIThread
public List LoadPages()
{
var result = new List();
foreach (var frame in Decoder.Frames)
{
result.Add(new ThumbnailModel
{
Name = _metadataLoader.GetPageName((BitmapMetadata)frame.Metadata),
Bitmap = new WriteableBitmap(frame)
});
}
return result;
}
I thought you could simply return the decoder from the thread to be able to access it but your decoder is a TiffBitmapDecoder which inherits from DispatcherObject (https://learn.microsoft.com/en-gb/dotnet/api/system.windows.threading.dispatcherobject?view=netcore-3.1).
So you won't be able to access it from a different thread than the one where it was created msdn:"Only the thread that the Dispatcher was created on may access the DispatcherObject directly"
What you could do instead is use the decoder in it's thread and return the final result:
I couldn't build on your sample since there was to much missing for me to test it but I built a similar project to give an exemple:
public partial class MainWindow : Window
{
public MainWindow()
{
}
public TiffBitmapDecoder LoadFile()
{
OpenFileDialog openFileDialog = new OpenFileDialog();
openFileDialog.InitialDirectory = "c:\\";
openFileDialog.Filter = "tiff files (*.tif)|*.tif|All files (*.*)|*.*";
openFileDialog.FilterIndex = 2;
openFileDialog.RestoreDirectory = true;
if (openFileDialog.ShowDialog() == true && !string.IsNullOrEmpty(openFileDialog.FileName))
{
//I didn't bother to check the file extension since it's just an exemple
using (var imageStream = openFileDialog.OpenFile())
{
return new TiffBitmapDecoder(imageStream, BitmapCreateOptions.PreservePixelFormat, BitmapCacheOption.OnLoad);
}
}
else
{
//User cancelled
return null;
}
}
public List<ThumbnailModel> LoadPages(TiffBitmapDecoder decoder)
{
//TiffBitmapDecoder" inherits from DispatcherObject/>
//https://learn.microsoft.com/en-gb/dotnet/api/system.windows.threading.dispatcherobject?view=netcore-3.1
var result = new List<ThumbnailModel>();
if (decoder != null)
{
try
{
foreach (var frame in decoder.Frames)
{
result.Add(new ThumbnailModel
{
//set the variables
});
}
}
catch(InvalidOperationException e)
{
MessageBox.Show(e.Message, "Error");
}
}
else
{
//Nothing to do
}
return result;
}
private async Task AsyncLoading()
{
this.thumbnailModels = await Task.Run<List<ThumbnailModel>>(() =>
{
var decoder = this.LoadFile();
return this.LoadPages(decoder);
});
}
private List<ThumbnailModel> thumbnailModels = null;
private async void AsyncLoadingButton_Click(object sender, RoutedEventArgs e)
{
await this.AsyncLoading();
}
}
public class ThumbnailModel
{
}
Content of MainWindow.xaml just in case:
<Grid>
<StackPanel Orientation="Vertical">
<Button x:Name="NoReturnButton" Margin="10" HorizontalAlignment="Center" Content="Call AsyncLoadingNoReturn" Click="AsyncLoadingButton_Click" />
</StackPanel>
</Grid>
I've an issue while trying to save an image to the Storage in iOS. Image is downloaded but not saved.
The code is:
Form hi = new Form("Toolbar", new BoxLayout(BoxLayout.Y_AXIS));
TreeModel tm = new TreeModel() {
#Override
public Vector getChildren(Object parent) {
String[] files;
if (parent == null) {
files = FileSystemStorage.getInstance().getRoots();
return new Vector<Object>(Arrays.asList(files));
} else {
try {
files = FileSystemStorage.getInstance().listFiles((String) parent);
} catch (IOException err) {
Log.e(err);
files = new String[0];
}
}
String p = (String) parent;
Vector result = new Vector();
for (String s : files) {
result.add(p + s);
}
return result;
}
#Override
public boolean isLeaf(Object node) {
return !FileSystemStorage.getInstance().isDirectory((String) node);
}
};
Command tree = new Command("Show tree") {
#Override
public void actionPerformed(ActionEvent evt) {
Form treeForm = new Form("Tree", new BorderLayout());
Tree t = new Tree(tm) {
#Override
protected String childToDisplayLabel(Object child) {
String n = (String) child;
int pos = n.lastIndexOf("/");
if (pos < 0) {
return n;
}
return n.substring(pos);
}
};
treeForm.add(BorderLayout.CENTER, t);
Command back = new Command("Back") {
#Override
public void actionPerformed(ActionEvent evt) {
hi.showBack();
}
};
Button backButton = new Button(back);
treeForm.add(BorderLayout.SOUTH, backButton);
treeForm.show();
}
};
hi.getToolbar().addCommandToOverflowMenu(tree);
EncodedImage placeholder = EncodedImage.createFromImage(Image.createImage(hi.getWidth(), hi.getWidth() / 5, 0xffff0000), true);
String photoURL = "https://awoiaf.westeros.org/images/thumb/9/93/AGameOfThrones.jpg/400px-AGameOfThrones.jpg";
StringBuilder fsPath = new StringBuilder(FileSystemStorage.getInstance().getAppHomePath());
fsPath.append("400px-AGameOfThrones.jpg");
URLImage background = URLImage.createToStorage(placeholder, fsPath.toString(), photoURL);
background.fetch();
Style stitle = hi.getToolbar().getTitleComponent().getUnselectedStyle();
stitle.setBgImage(background);
stitle.setBackgroundType(Style.BACKGROUND_IMAGE_SCALED_FILL);
stitle.setPaddingUnit(Style.UNIT_TYPE_DIPS, Style.UNIT_TYPE_DIPS, Style.UNIT_TYPE_DIPS, Style.UNIT_TYPE_DIPS);
stitle.setPaddingTop(15);
SpanButton credit = new SpanButton("Link");
credit.addActionListener((e) -> Display.getInstance().execute("https://awoiaf.westeros.org/index.php/A_Game_of_Thrones"));
hi.add(new SpanLabel("A")).
add(new Label("B", "Heading")).
add(credit);
ComponentAnimation title = hi.getToolbar().getTitleComponent().createStyleAnimation("Title", 200);
hi.getAnimationManager().onTitleScrollAnimation(title);
hi.show();
Which was taken from https://www.codenameone.com/javadoc/com/codename1/ui/URLImage.html
The tree is only to see if the image was saved in the Storage.
You are mixing Storage & FileSystemStorage which are very different things see this.
You can use storage which is a flat set of "files" and that's what URLImage.createToStorage does. But then you need to use the Storage API to work with that and it might not be visible in the FileSystemStorage API.
Alternatively you might be looking for URLImage.createToFileSystem().
I have a utility that allows the user to take a camera photo and upload it, in addition to another option to upload a file. I've got most of it working, except for the part where I have to convert the webcam image to a jpg prior to upload. The code below has no error but produces invalid image data:
void CaptureImageCompleted(object sender, CaptureImageCompletedEventArgs e)
{
busyIndicator.IsBusy = true;
stopCapture();
capturedImage.ImageSource = e.Result;
ImageTools.ExtendedImage eimg = e.Result.ToImage();
var encoder = new ImageTools.IO.Jpeg.JpegEncoder();
Stream stream = eimg.ToStreamByExtension("jpg");
//DO THIS LATER
//if (stream.Length > 512000)
//{
// eimg = ExtendedImage.Resize(eimg, 240, new NearestNeighborResizer());
// stream = eimg.ToStreamByExtension("jpg");
//}
encoder.Encode(eimg, stream);
BitmapImage bitmap = new BitmapImage();
bitmap.SetSource(stream);
byte[] bytes = new byte[stream.Length];
stream.Read(bytes, 0, (int)stream.Length);
// picture file a class object to be used by uploader
pictureFile.PictureName = "webcam.jpg"; // name will be changed later
pictureFile.PictureStream = bytes;
HtmlPage.Window.Invoke("gotDetails_WebCam", ""); // post page, then come back and do upload
}
Here is what PictureFile looks like:
[DataContract]
public class PictureFile
{
[DataMember]
public string PictureName { get; set; }
[DataMember]
public byte[] PictureStream { get; set; }
}
Can anyone figure out what I'm doing wrong to produce the bytes needed for a jpeg?
good to see that you solved,
here is my running code,
I use png format,there is also file size check.
Maybe it helps s.one else.
dSrvPR is my Domain Service Class instance
photo is an entity object in my EF.
_captureSource.CaptureImageCompleted += ((s, args) =>
{
if (dSrvPR.PR_PATIENTPHOTOs.Count > 0 && photo != null)
{
dSrvPR.PR_PATIENTPHOTOs.Remove(photo);
}
dSrvPR.PR_PATIENTPHOTOs.Clear();
photo = new PR_PATIENTPHOTO();
ImageTools.ExtendedImage eimg=args.Result.ToImage();
var encoder=new ImageTools.IO.Png.PngEncoder();
Stream stream= eimg.ToStreamByExtension("png");
if (stream.Length > 512000)
{
eimg= ExtendedImage.Resize(eimg, 240, new NearestNeighborResizer());
stream = eimg.ToStreamByExtension("png");
}
if (stream.Length <= 512001)
{
BinaryReader binary = new BinaryReader(stream);
//Read bytes from the BinaryReader and put them into a byte array.
Byte[] file = binary.ReadBytes((int)stream.Length);
photo.ID = Guid.NewGuid();
photo.PHOTO = file;
photo.PHOTODATE = DateTime.Now;
photo.ISACTIVE = true;
//some more unrelated fields
dSrvPR.PR_PATIENTPHOTOs.Add(photo);
dSrvPR.SubmitChanges();
//Msg succedded
}
else
{
Util.alert(...,"file size exceeded! :)";
}
});
My mistake. It seems I had some extra code in there (unnecessarily converting stream to bitmap). Here is what I got working:
void CaptureImageCompleted(object sender, CaptureImageCompletedEventArgs e)
{
busyIndicator.IsBusy = true;
stopCapture();
capturedImage.ImageSource = e.Result;
ImageTools.ExtendedImage eimg = e.Result.ToImage();
var encoder = new ImageTools.IO.Jpeg.JpegEncoder();
Stream stream = eimg.ToStreamByExtension("jpg");
byte[] bytes = new byte[stream.Length];
stream.Read(bytes, 0, (int)stream.Length);
// picture file a class object to be used by uploader
pictureFile.PictureName = "webcam.jpg"; // name will be changed later
pictureFile.PictureStream = bytes;
HtmlPage.Window.Invoke("gotDetails_WebCam", ""); // post page, then come back and do upload
}
I have this application where I use windowsForm and UserControl to draw some diagrams. After I am done I want to save them or I want to open an existing file that I created before and keep working on the diagram. So, I want to use the save and open dialog File to save or open my diagrams.
EDIT:
this is what i have :
//save the object to the file
public bool ObjectToFile(Object model, string FileName)
{
try
{
System.IO.MemoryStream _MemoryStream = new System.IO.MemoryStream();
System.Runtime.Serialization.Formatters.Binary.BinaryFormatter _BinaryFormatter = new System.Runtime.Serialization.Formatters.Binary.BinaryFormatter();
_BinaryFormatter.Serialize(_MemoryStream, model);
byte[] _ByteArray = _MemoryStream.ToArray();
System.IO.FileStream _FileStream = new System.IO.FileStream(FileName, System.IO.FileMode.Create, System.IO.FileAccess.Write);
_FileStream.Write(_ByteArray.ToArray(), 0, _ByteArray.Length);
_FileStream.Close();
_MemoryStream.Close();
_MemoryStream.Dispose();
_MemoryStream = null;
_ByteArray = null;
return true;
}
catch (Exception _Exception)
{
Console.WriteLine("Exception caught in process: {0}", _Exception.ToString());
}
return false;
}
//load the object from the file
public Object FileToObject(string FileName)
{
try
{
System.IO.FileStream _FileStream = new System.IO.FileStream(FileName, System.IO.FileMode.Open, System.IO.FileAccess.Read);
System.IO.BinaryReader _BinaryReader = new System.IO.BinaryReader(_FileStream);
long _TotalBytes = new System.IO.FileInfo(FileName).Length;
byte[] _ByteArray = _BinaryReader.ReadBytes((Int32)_TotalBytes);
_FileStream.Close();
_FileStream.Dispose();
_FileStream = null;
_BinaryReader.Close();
System.IO.MemoryStream _MemoryStream = new System.IO.MemoryStream(_ByteArray);
System.Runtime.Serialization.Formatters.Binary.BinaryFormatter _BinaryFormatter = new System.Runtime.Serialization.Formatters.Binary.BinaryFormatter();
_MemoryStream.Position = 0;
return _BinaryFormatter.Deserialize(_MemoryStream);
}
catch (Exception _Exception)
{
Console.WriteLine("Exception caught in process: {0}", _Exception.ToString());
}
return null;
}
and now I want to do this but it's not working
public void save()
{
SaveFileDialog saveFileDialog1 = new SaveFileDialog();
saveFileDialog1.Filter = "txt files (*.txt)|*.txt";
saveFileDialog1.FilterIndex = 2;
saveFileDialog1.RestoreDirectory = true;
if (saveFileDialog1.ShowDialog() == DialogResult.OK)
{
if (saveFileDialog1.OpenFile() != null)
{
ObjectToFile(model, saveFileDialog1.FileName);
}
}
}
but if I try without the fileDialog and i just use
ObjectToFile(model, "d:\\objects.txt");
this works. And I want to save it where I want and with my own name.
Check out the SaveFileDialog and OpenFileDialog classes. They are pretty similar, and can be used like this:
using(SaveFileDialog sfd = new SaveFileDialog()) {
sfd.Filter = "Text Files|*.txt|All Files|*.*";
if(sfd.ShowDialog() != DialogResult.OK) {
return;
}
ObjectToFile(sfd.FileName);
}
The mechanics of actually saving your file are, obviously, outside the scope of this answer.
Edit: I've updated my answer to reflect the new information in your post.