How to create a timer for c# windows phone 7?
I already find a timer, but it was for normal c#, and on C# for windows phone we can´t use system.Timers!I want to play the video just from 5000ms.
This is my code:
using (IsolatedStorageFile myIsolatedStorage = IsolatedStorageFile.GetUserStoreForApplication())
{
IsolatedStorageFileStream isoFileStream = myIsolatedStorage.OpenFile("xml_file.xml", FileMode.Open);
XElement xml = XElement.Load(isoFileStream);
foreach (XElement node2 in xml.Element("graphics").Elements("file"))
{
string url_graficos = node2.Element("fileurl").Value;
string[] array = url_graficos.Split('/');
string[,] resultadosImage = { { node2.Element("fileurl").Value, node2.Element("playtime").Value, node2.Element("transition").Value } };
mediaSound.Play();
mediaSound.Stop();
The class you are looking for is a DispatcherTimer. Here is a good tutorial on how to use it.
Hope this helps you.
Related
im searching for a good imaging SDK for windows phone ...
i tried to use Nokia SDK but it didn't work for me, it keeps showing as exception:
"Operation Is Not Valid Due To The Current State Of The Object."
here is my test code:
The processImage method is used to apply the filter on the image.
private async void processImage()
{
WriteableBitmap writeableBitmap = new WriteableBitmap((int)bitmapImage.PixelWidth, (int)bitmapImage.PixelHeight);
try
{
using (var imageStream = new StreamImageSource(photoStream))
{
// Applying the custom filter effect to the image stream
using (var customEffect = new NegateFilter(imageStream))
{
// Rendering the resulting image to a WriteableBitmap
using (var renderer = new WriteableBitmapRenderer(customEffect, writeableBitmap))
{
// Applying the WriteableBitmap to our xaml image control
await renderer.RenderAsync();
imageGrid.Source = writeableBitmap;
}
}
}
}
catch (Exception exc) { MessageBox.Show(exc.Message + exc.StackTrace, exc.Source, MessageBoxButton.OK); }
}
This is the NegateFilter class:
namespace ImagingTest
{
class NegateFilter : CustomEffectBase
{
public NegateFilter(IImageProvider source) : base(source){}
protected override void OnProcess(PixelRegion sourcePixelRegion, PixelRegion targetPixelRegion)
{
sourcePixelRegion.ForEachRow((index, width, pos) =>
{
for (int x = 0; x < width; ++x, ++index)
{
targetPixelRegion.ImagePixels[index] = 255 - sourcePixelRegion.ImagePixels[index];
}
});
}
}
}
any ideas for a good imaging SDK? like ImageJ on java for example, or OpenCV ..
i will be better to use Nokia SDK ..
thx :)
I looked in to you code and did a quick test.
The code worked fine when I just made sure that the bitmapImage.PixelWidth and bitmapImage.PixelHeight > 0.
I did not get and image on the screen but when I remove your custom filter the image is show.
I hope you will continue to use the SDK since it is a great product.
What about emguCV?
I am not try it yet but looks like it's possible with phone's camera.
In my Windows 8 app I get an image as base64 string. Now I am looking for a method that converts the string so that I can include it in my XAML image, something like this:
public static Image Base64ToImage(string s)
{
// How To?
}
I have seen many solutions but all of them use classes/methods that are not available in Windows 8 store apps. Thanks for your hints.
The method could look like this:
private async Task<BitmapImage> Base64ToImage(string base64)
{
var bitmap = new BitmapImage();
var buffer = Convert.FromBase64String(base64);
using (var stream = new InMemoryRandomAccessStream())
{
await stream.WriteAsync(buffer.AsBuffer());
stream.Seek(0);
bitmap.SetSource(stream);
}
return bitmap;
}
I want to play an audio file from my isolated storage.. but I don't want to play from the beginning.. I want to play the audio file at 33seconds position.. How can I do this? Any function to define?
I have this method to open:
private void Play_Audio(string name_file)
{
using (var isf = IsolatedStorageFile.GetUserStoreForApplication())
{
if (isf.FileExists(name_file))
{
using (var isoStream = isf.OpenFile(name_file, FileMode.Open, FileAccess.Read))
{
mediaSound.SetSource(isoStream);
mediaSound.Volume = 100;
mediaSound.Play();
mediaSound.Stop();
isoStream.Close();
}
}
else
{
//MessageBox.Show("The file does not exist");
}
}
}
There's nothing like mediaSound.PlayAtPosition(33)??????????
Show me an example;)
You can set the position to play at using the Position property.
Please note that not all sources support being able to be played at a specific point so make sure you check support for this feature using the CanSeek property.
I have a Mango WP7.5 app that uses a local SqlCe database. I would like to add a LiveTile update that shows info taken from the local DB based on current day and month.
All the samples that I've found update the background by downloading remote images from servers but I would simply need to make a local database query and show a string in my tile.
Can I do it? How?
Yes, you can. You have to
generate an image containing your textual information
save this image to isolated storage and
access it via isostore URI.
Here is code showing how to do this (it updates the Application Tile):
// set properties of the Application Tile
private void button1_Click(object sender, RoutedEventArgs e)
{
// Application Tile is always the first Tile, even if it is not pinned to Start
ShellTile TileToFind = ShellTile.ActiveTiles.First();
// Application Tile should always be found
if (TileToFind != null)
{
// create bitmap to write text to
WriteableBitmap wbmp = new WriteableBitmap(173, 173);
TextBlock text = new TextBlock() { FontSize = (double)Resources["PhoneFontSizeExtraLarge"], Foreground = new SolidColorBrush(Colors.White) };
// your text from database goes here:
text.Text = "Hello\nWorld";
wbmp.Render(text, new TranslateTransform() { Y = 20 });
wbmp.Invalidate();
// save image to isolated storage
using (IsolatedStorageFile isf = IsolatedStorageFile.GetUserStoreForApplication())
{
// use of "/Shared/ShellContent/" folder is mandatory!
using (IsolatedStorageFileStream imageStream = new IsolatedStorageFileStream("/Shared/ShellContent/MyImage.jpg", System.IO.FileMode.Create, isf))
{
wbmp.SaveJpeg(imageStream, wbmp.PixelWidth, wbmp.PixelHeight, 0, 100);
}
}
StandardTileData NewTileData = new StandardTileData
{
Title = "Title",
// reference saved image via isostore URI
BackgroundImage = new Uri("isostore:/Shared/ShellContent/MyImage.jpg", UriKind.Absolute),
};
// update the Application Tile
TileToFind.Update(NewTileData);
}
}
This question already has an answer here:
Closed 11 years ago.
Possible Duplicate:
store image into isolated storage in windows phone 7
I am using Visual Studio/Expression Blend to create my app for windows phone 7. The user should be able to select a picture that he/she wants to edit and after editing, the user can click a "save" button and the specific edited image will be saved in isolated storage. But I'm having trouble saving the image to Isolated Storage from the button click event.
Does anyone have a code example of how this can be achieved? Thanks!
My codes for the button :
using (var isoStore = IsolatedStorageFile.GetUserStoreForApplication())
{
var bi = new BitmapImage(); bi.SetSource(pic);
var wb = new WriteableBitmap(lion.jpg,lion.jpg.RenderTransform);
using (var isoFileStream = isoStore.CreateFile("somepic.jpg"))
{
var width = wb.PixelWidth;
var height = wb.PixelHeight;
Extensions.SaveJpeg(wb, isoFileStream, width, height, 0, 100);
}
}
To save an image to IsolatedStorage from a PhotoChooserTask, use this (the e object in the task callback holds the stream):
public static void SaveImage(Stream imageStream, string fileName, int orientation, int quality)
{
using (var isolatedStorage = IsolatedStorageFile.GetUserStoreForApplication())
{
if (isolatedStorage.FileExists(fileName))
isolatedStorage.DeleteFile(fileName);
IsolatedStorageFileStream fileStream = isolatedStorage.CreateFile(fileName);
BitmapImage bitmap = new BitmapImage();
bitmap.SetSource(imageStream);
WriteableBitmap wb = new WriteableBitmap(bitmap);
wb.SaveJpeg(fileStream, wb.PixelWidth, wb.PixelHeight, orientation, quality);
fileStream.Close();
}
}