This is as far as I've gotten. What code would I write to save a captured image to the server? Without any dialog prompting for a save location. Similar to the way Facebook does it. (I've been unable to find examples online)
void CaptureSource_CaptureImageCompleted(object sender, CaptureImageCompletedEventArgs e)
{
capturedImage.ImageSource = e.Result;
stopCapture(); // turns off webcam
}
It is not that simple.
Create a WCF service on the server.
Consume it on the silverlight client.
Call service method to send an image to the server.
Save it on the server with custom logic.
Or, if this is too complicated - follow this tutorial. It is rather compact RESTful approach demo.
I did i before,
Firstly
ImageTools is good library not must but a good library, you may use.
Beside this you shoul check for permission for camera access. Then here is the code,
Hope helps,
/Capture image part/
_captureSource.CaptureImageCompleted += ((s, args) =>
{
//some other stuffs
domainServiceObject.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");
}
/Reload Image Part/
//note photo.photo is byte[]
photo = domainServerObject.PR_PATIENTPHOTOs.FirstOrDefault();
if (photo != null)
{
using (MemoryStream ms = new MemoryStream(photo.PHOTO, 0, photo.PHOTO.Length))
{
ms.Write(photo.PHOTO, 0, photo.PHOTO.Length);
BitmapImage img = new BitmapImage();
img.SetSource(ms);
imagePatientPhoto.Source = img;
}
}
Related
I try to develop several WP8 apps using the same credentials for all(same user and password).So if the user choose to change his credentials he does only once in one app and it will change for all.
Until now i used Isolatedstorage to save the credentials(as shown below) but im wondering if the files would be accessible by all the apps...i guess they would not.
So what solution do you have ?
thanks for your help
public static void SaveToFile(byte[] Encryptedfile, string FileName)
{
using (var SaveApplicationFile = IsolatedStorageFile.GetUserStoreForApplication())
{
SaveApplicationFile.DeleteFile(FileName);
using (IsolatedStorageFileStream fileAsStream = new IsolatedStorageFileStream(FileName, System.IO.FileMode.Create, FileAccess.Write, SaveApplicationFile))
{
using (Stream writer = new StreamWriter(fileAsStream).BaseStream)
{
writer.Write(Encryptedfile, 0, Encryptedfile.Length);
}
}
}
}
You can't access IsolatedStorage of other App.
Nor you can't save on SD card.
Maybe consider using Skydrive or other exteral storage.
Another idea, I'm thinking about - maybe you can use MediaLibrary and Save Picture there. And use this picture as a container for some data - maybe using Steganography ;)
I have created a silverlight project that captures the image through the webcam and stores it in my local hard, but I don't want to save it on the local hard I want to store it in my project folder then store the path in SQL database.
Please Help!
You could try and save the image directly as a bitstream to the DB maybe?
private static ImageElementContract ImageToImageElementContract(Image image)
{
WriteableBitmap bmp = new WriteableBitmap(image, null);
ImageTools.ExtendedImage myImage = new ImageTools.ExtendedImage();
myImage = ImageExtensions.ToImage(bmp);
MemoryStream mStream = new MemoryStream();
JpegEncoder encoder = new JpegEncoder();
encoder.Quality = 100;
encoder.Encode(myImage, mStream);
imageContract.ImageStream = mStream.ToArray();
return imageContract;
}
Should give you a stream, which you can pass to the DB and put back together if you need it again. It's hard to tell what your using it for. There's not much detail in your question
I am trying to do a file upload from Silverlight(Client Object Model) to Sharepoint 2010 library.. Please see the code below..
try{
context = new ClientContext("http://deepu-pc/");
web = context.Web;
context.Load(web);
OpenFileDialog oFileDialog = new OpenFileDialog();
oFileDialog.FilterIndex = 1;
oFileDialog.Multiselect = false;
if (oFileDialog.ShowDialog().Value == true)
{
var localFile = new FileCreationInformation();
localFile.Content = System.IO.File.ReadAllBytes(oFileDialog.File.FullName);
localFile.Url = System.IO.Path.GetFileName(oFileDialog.File.Name);
List docs = web.Lists.GetByTitle("Gallery");
context.Load(docs);
File file = docs.RootFolder.Files.Add(localFile);
context.Load(file);
context.ExecuteQueryAsync(OnSiteLoadSuccess, OnSiteLoadFailure);
}
}
catch (Exception exp)
{
MessageBox.Show(exp.ToString());
}
But I am getting the following error
System.Security.SecurityException: File operation not permitted. Access to path '' is denied.
at System.IO.FileSecurityState.EnsureState()
at System.IO.FileSystemInfo.get_FullName()
at ImageUploadSilverlight.MainPage.FileUpload_Click(Object sender, RoutedEventArgs e)
Any help would be appreciated
Thanks
Deepu
Silverlight runs with very restricted access to the client user's filesystem. When using an open-file dialog, you can get the name of the selected file within its parent folder, the length of the file, and a stream from which to read the data in the file, but not much more than that. You can't read the full path of the file selected, and you are getting the exception because you are attempting to do precisely that.
If you want to read the entire content of the file into a byte array, you'll have to replace the line
localFile.Content = System.IO.File.ReadAllBytes(oFileDialog.File.FullName);
with something like
localFile.content = ReadFully(oFileDialog.File.OpenRead());
The ReadFully method reads the entire content of a stream into a byte array. It's not a standard Silverlight method; instead it
is taken from this answer. (I gave this method a quick test on Silverlight, and it appears to work.)
I have a problem with saving an image (or a bitmapImage or a PhotoResult) to a byte[] and then converting it back to an image.
I found a lot of posts on the internet about it but they dont work. In this code I got an Unspecifed error when I do this: SetSource ( bitmapImage.SetSource(ms);) and dont know how to do that.
I also want to make a list of Devices (each with a name, id, status and an image which I will represent as a byte[]) and save it to IsolatedStorage, and then read it and list them (with an image of course.)
Here is some code I have so far:
public void photoChooserTask_Completed(object sender, PhotoResult e)
{
if (e.TaskResult == TaskResult.OK)
{
imageBytes = new byte[e.ChosenPhoto.Length];
e.ChosenPhoto.Read(imageBytes, 0, imageBytes.Length);
BitmapImage bitmapImage = new BitmapImage();
MemoryStream ms = new MemoryStream(imageBytes);
try
{
bitmapImage.SetSource(ms);
}
catch (Exception ea)
{
//
}
image1.Source = bitmapImage;
}
Have you tried the Microsoft.Phone.PictureDecoder class? It has a DecodeJpeg function that returns an instance of a WritableBitmap object.
Another solution is to use the WritableBitmapEx extension library that makes digital image processing much easier and has a very good performance. The function you need is called FromByteArray.
In both cases you'll have to use a WriteableBitmap, because BitmapImage is protected from modification. Since both BitmapImage and WriteableBitmap are subclasses of BitmapSource, you can easily display them in the image control.
Hope it helps!
I have a set of Image elements that I use to download pictures. All the pictures have to be downloaded, but I wish to download the picture the user is looking at in the first place. If the user changes the viewed picture, I wish to cancel the downloads in progress to get the viewed picture as fast as possible.
To start a download I write: myImage.Source = new BitmapImage(theUri);.
How should I cancel it?
myImage.Source = null; ?
act on the BitmapImage ?
a better solution ?
I don't wish to download the picture by code to keep the benefit of the browser cache.
This is definitely doable -- I just tested it to make sure. Here is a quick class you can try:
public partial class Page : UserControl
{
private WebClient m_oWC;
public Page()
{
InitializeComponent();
m_oWC = new WebClient();
m_oWC.OpenReadCompleted += new OpenReadCompletedEventHandler(m_oWC_OpenReadCompleted);
}
void StartDownload(string sImageURL)
{
if (m_oWC.IsBusy)
{
m_oWC.CancelAsync();
}
m_oWC.OpenReadAsync(new Uri(sImageURL));
}
void m_oWC_OpenReadCompleted(object sender, OpenReadCompletedEventArgs e)
{
BitmapImage oBMI = new BitmapImage();
oBMI.SetSource(e.Result);
imgMain.Source = oBMI;
}
}
This works just like you wanted (I tested it). Everytime you call StartDownload with the URL of an image (presumably whenever a user clicks to the next image) if there is a current download in progress it is canceled. The broswer cache is also definitely being used (I verified with fiddler), so cached images are loaded ~ instantly.