Please Help Me, How To do json Parsing in Windows Phone 7 using given URL is https://data.cityofchicago.org/api/views/xzkq-xp2w/rows.json?search=rahm
add newtonnsoft json library to visual studio and use this code
WebClient webClient = new WebClient();
webClient.OpenReadCompleted += new OpenReadCompletedEventHandler(downloadAboutCompleted);
webClient.OpenReadAsync(new Uri("https://data.cityofchicago.org/api/views/xzkq-xp2w/rows.json?search=rahm"), c);
private void downloadAlbumCompleted(object sender, OpenReadCompletedEventArgs e)
{
if (e.Error == null && !e.Cancelled)
{
using (StreamReader httpwebStreamReader = new StreamReader(e.Result))
{
var results = httpwebStreamReader.ReadToEnd();
System.Diagnostics.Debug.WriteLine(results):
var json = JObject.Parse(results);
System.Diagnostics.Debug.WriteLine(json):
foreach (JObject array in json["meta"]["view"])
{
JObject obj = JObject.Parse(array.ToString());
string id= (string)obj["id"];
string name= (string)obj["name"];
System.Diagnostics.Debug.WriteLine(id + name):
}
}
}
}
Related
I am trying to call a Web API method from a handheld device (Compact Framework) with this code:
// "fullFilePath" is a value such as "\Program Files\Bla\abc.xml"
// "uri" is something like "http://localhost:28642/api/ControllerName/PostArgsAndXMLFile?serialNum=8675309&siteNum=42"
SendXMLFile(fullFilePath, uri, 500);
. . .
public static string SendXMLFile(string xmlFilepath, string uri, int timeout)
{
uri = uri.Replace('\\', '/');
if (!uri.StartsWith("/"))
{
uri = "/" + uri;
}
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(uri);
request.KeepAlive = false;
request.ProtocolVersion = HttpVersion.Version10;
request.Method = "POST";
StringBuilder sb = new StringBuilder();
using (StreamReader sr = new StreamReader(xmlFilepath))
{
String line;
while ((line = sr.ReadLine()) != null)
{
sb.AppendLine(line);
}
byte[] postBytes = Encoding.UTF8.GetBytes(sb.ToString());
if (timeout < 0)
{
request.ReadWriteTimeout = timeout;
request.Timeout = timeout;
}
request.ContentLength = postBytes.Length;
request.KeepAlive = false;
request.ContentType = "application/x-www-form-urlencoded"; // not "text/xml" correct?
try
{
Stream requestStream = request.GetRequestStream();
requestStream.Write(postBytes, 0, postBytes.Length);
requestStream.Close();
using (var response = (HttpWebResponse)request.GetResponse())
{
return response.ToString();
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
request.Abort();
return string.Empty;
}
}
}
Somewhere in SendXMLFile(), it is failing with "NotSupportedException" though... As it's running on a handheld device, I can't put a breakpoint in it and step through it; I could sprinkle a bunch of debug statements throughout (MessageBox.Show()), but I'd rather not do that.
The server code never even reaches the breakpoint I put on the "XDocument doc =" line below:
[Route("api/ControllerName/PostArgsAndXMLFile")]
public void PostArgsAndFile([FromBody] string stringifiedXML, string serialNum, string siteNum)
{
XDocument doc = XDocument.Parse(stringifiedXML);
Is it that the Compact framework can't call a (RESTful) Web API method for some reason? Obviously, the client (handheld/Compact Framework) compiles and runs, it just refuses to actually follow through with the runtime realities of it all.
Does my code require a small alteration for it to fit, or do I need to take a completely different tack?
Web API is not going to be able to handle your body content. You declared it as application/x-form-urlencoded, but it is actually XML formatted and your method signature is expecting it to be a XMLDataContract serialized string.
Instead of using the parameter stringifiedXML, instead, just read the body inside your method..
[Route("api/ControllerName/PostArgsAndXMLFile")]
public async void PostArgsAndFile(string serialNum, string siteNum)
{
XDocument doc = XDocument.Parse(await Request.Content.ReadAsStringAsync());
}
Or event better, use a stream directly.
[Route("api/ControllerName/PostArgsAndXMLFile")]
public async void PostArgsAndFile(string serialNum, string siteNum)
{
XDocument doc = XDocument.Load(await Request.Content.ReadAsStreamAsync());
}
This way, you can put the ContentType on the client back to application/xml as it should be.
Using Darrel's code on the server side (I'm using the second one, the Stream), this works on the Client side:
public static string SendXMLFile(string xmlFilepath, string uri, int timeout)
{
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(uri);
request.KeepAlive = false;
request.ProtocolVersion = HttpVersion.Version10;
request.ContentType = "application/xml";
request.Method = "POST";
StringBuilder sb = new StringBuilder();
using (StreamReader sr = new StreamReader(xmlFilepath))
{
String line;
while ((line = sr.ReadLine()) != null)
{
sb.AppendLine(line);
}
byte[] postBytes = Encoding.UTF8.GetBytes(sb.ToString());
if (timeout < 0)
{
request.ReadWriteTimeout = timeout;
request.Timeout = timeout;
}
request.ContentLength = postBytes.Length;
request.KeepAlive = false;
request.ContentType = "application/x-www-form-urlencoded";
try
{
Stream requestStream = request.GetRequestStream();
requestStream.Write(postBytes, 0, postBytes.Length);
requestStream.Close();
using (var response = (HttpWebResponse)request.GetResponse())
{
return response.ToString();
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
request.Abort();
return string.Empty;
}
}
}
Which can be called like so:
private void buttonNose_Click(object sender, EventArgs e)
{
String fullFilePath = #"C:\McMurtry\LonesomeDove.XML";
String uri = #"http://localhost:21608/api/inventory/sendxml/ff/gg/42";
SendXMLFile(fullFilePath, uri, 500);
}
I am developing a Windows Phone app in which I have to post a photo to facebook. And that particular photo is choosen by using PhotoChooserTask or CameraChooserTask.
Normally, I can post a particular photo successfully, but I am facing problem to post the selected photo. I saw some link like
link
So please if anyone know about the issue please help me out.
Thanx in advance.
EDIT
private void PostClicked(object sender, RoutedEventArgs e)
{
//Client Parameters
var parameters = new Dictionary<string, object>();
//var parameters1 = new Dictionary<>();
parameters["client_id"] = FBApi;
parameters["redirect_uri"] = "https://www.facebook.com/connect/login_success.html";
parameters["response_type"] = "token";
parameters["display"] = "touch";
parameters["ContentType"] = "image/png";
//The scope is what give us the access to the users data, in this case
//we just want to publish on his wall
parameters["scope"] = "publish_stream";
Browser.Visibility = System.Windows.Visibility.Visible;
Browser.Navigate(client.GetLoginUrl(parameters));
}
private void BrowserNavitaged(object sender, System.Windows.Navigation.NavigationEventArgs e)
{
FacebookOAuthResult oauthResult;
//Making sure that the url actually has the access token
if (!client.TryParseOAuthCallbackUrl(e.Uri, out oauthResult))
{
return;
}
//Checking that the user successfully accepted our app, otherwise just show the error
if (oauthResult.IsSuccess)
{
//Process result
client.AccessToken = oauthResult.AccessToken;
//Hide the browser
Browser.Visibility = System.Windows.Visibility.Collapsed;
PostToWall();
}
else
{
//Process Error
MessageBox.Show(oauthResult.ErrorDescription);
Browser.Visibility = System.Windows.Visibility.Collapsed;
}
}
private void PostToWall()
{
string imageName = "ic_launcher.png";
StreamResourceInfo sri = null;
Uri jpegUri = new Uri(imageName, UriKind.Relative);
sri = Application.GetResourceStream(jpegUri);
try
{
byte[] imageData = new byte[sri.Stream.Length];
sri.Stream.Read(imageData, 0, System.Convert.ToInt32(sri.Stream.Length));
FacebookMediaObject fbUpload = new FacebookMediaObject
{
FileName = imageName,
ContentType = "image/jpg"
};
fbUpload.SetValue(imageData);
string name1 = eventname.Text;
string format = "yyyy-MM-dd";
string message1 = eventmessage.Text;
string date1 = datepicker.ValueString;
DateTime datevalue = DateTime.Parse(date1);
string d = datevalue.ToString(format);
string memoType = "Tribute";
var parameters = new Dictionary<string, object>();
var parameters1 = new Dictionary<string, object>();
parameters["message"] = name1 + "\n" + d + "\n" + memoType + "\n" + message1;
parameters["source"] = fbUpload;
webservice();
client.PostTaskAsync("me/photos", parameters);
}
catch (Exception error)
{
MessageBox.Show(error.ToString());
}
//client.PostTaskAsync("me/photos", parameters1);
}
On clicking on a button I am calling PostClicked class and it will directly go to facebook mainpage and it will ask for login information. Like this I am doing.
Please check it out
Now I can share a photo to facebook successfully by using photochoosertask or cameratask.
I am sharing my experience so that if anyone face the same issue can use it.
private void photoChooserTask_Completed(object sender, PhotoResult e)
{
BitmapImage image = new BitmapImage();
image.SetSource(e.ChosenPhoto);
SaveImageToIsolatedStorage(image, tempJPEG);
this.image.Source = image;
}
public void SaveImageToIsolatedStorage(BitmapImage image, string fileName)
{
using (var isolatedStorage = IsolatedStorageFile.GetUserStoreForApplication())
{
if (isolatedStorage.FileExists(fileName))
isolatedStorage.DeleteFile(fileName);
var fileStream = isolatedStorage.CreateFile(fileName);
if (image != null)
{
var wb = new WriteableBitmap(image);
wb.SaveJpeg(fileStream, wb.PixelWidth, wb.PixelHeight, 0, 100);
}
fileStream.Close();
}
}
With this you can able to save the selected image to IsolatedStorage.
And then at the time of posting the photo to facebook you have to select the image from IsolatedStorage.
private void PostClicked(object sender, RoutedEventArgs e)
{
//Client Parameters
var parameters = new Dictionary<string, object>();
parameters["client_id"] = FBApi;
parameters["redirect_uri"] = "https://www.facebook.com/connect/login_success.html";
parameters["response_type"] = "token";
parameters["display"] = "touch";
//The scope is what give us the access to the users data, in this case
//we just want to publish on his wall
parameters["scope"] = "publish_stream";
Browser.Visibility = System.Windows.Visibility.Visible;
Browser.Navigate(client.GetLoginUrl(parameters));
}
private void BrowserNavitaged(object sender, System.Windows.Navigation.NavigationEventArgs e)
{
FacebookOAuthResult oauthResult;
//Making sure that the url actually has the access token
if (!client.TryParseOAuthCallbackUrl(e.Uri, out oauthResult))
{
return;
}
//Checking that the user successfully accepted our app, otherwise just show the error
if (oauthResult.IsSuccess)
{
//Process result
client.AccessToken = oauthResult.AccessToken;
//Hide the browser
Browser.Visibility = System.Windows.Visibility.Collapsed;
PostToWall();
}
else
{
//Process Error
MessageBox.Show(oauthResult.ErrorDescription);
Browser.Visibility = System.Windows.Visibility.Collapsed;
}
}
private void PostToWall()
{
try
{
byte[] data;
using (IsolatedStorageFile myIsolatedStorage = IsolatedStorageFile.GetUserStoreForApplication())
{
using (IsolatedStorageFileStream fileStream = myIsolatedStorage.OpenFile(tempJPEG, FileMode.Open, FileAccess.Read))
{
data = new byte[fileStream.Length];
fileStream.Read(data, 0, data.Length);
fileStream.Close();
}
}
//MemoryStream ms = new MemoryStream(data);
//BitmapImage bi = new BitmapImage();
//// Set bitmap source to memory stream
//bi.SetSource(ms);
//this.imageTribute.Source = bi;
FacebookMediaObject fbUpload = new FacebookMediaObject
{
FileName = tempJPEG,
ContentType = "image/jpg"
};
fbUpload.SetValue(data);
string name1 = eventname.Text;
string format = "yyyy-MM-dd";
string message1 = eventmessage.Text;
string date1 = datepicker.ValueString;
DateTime datevalue = DateTime.Parse(date1);
string d = datevalue.ToString(format);
string memoType = "Notice";
var parameters = new Dictionary<string, object>();
var parameters1 = new Dictionary<string, object>();
parameters["message"] = name1;
parameters["source"] = fbUpload;
webservice();
client.PostTaskAsync("me/photos", parameters);
}
catch (Exception error)
{
MessageBox.Show(error.ToString());
}
}
Thanx to all....
you can do that by two methods :
1) by using mediasharetask in which it will show u all sharing account to which your phone is synced like facebook,gmail,linkdin,twitter,etc : it can be used like like this.
ShareMediaTask shareMediaTask = new ShareMediaTask();
shareMediaTask.FilePath = path;
shareMediaTask.Show();
2) by using facebook sdk. you can get the package from nuget manager and then u can use it to share on facebook.
I hope this might help u.
I am developing a windows phone application. The webclient does not fire as I expected. The related code is as below:
public PArticle(PocketListItem aPli)
{
this.pli = aPli;
using (IsolatedStorageFile isf = IsolatedStorageFile.GetUserStoreForApplication())
{
if (!isf.FileExists(aPli.ID + ".json"))
{
WebClient client = new WebClient();
client.DownloadStringCompleted += new DownloadStringCompletedEventHandler(client_DownloadStringCompleted);
client.DownloadStringAsync(new Uri(pli.Url));
}
else
{
string json = RetrieveDataFromLocalStorage(aPli.ID + ".json");
PocketArticle pa = JsonConvert.DeserializeObject<PocketArticle>(json);
this.text = pa.text;
}
}
}
void client_DownloadStringCompleted(object sender, DownloadStringCompletedEventArgs e)
{
var readability = Readability.Create(e.Result);
this.text = readability.Content;
}
I know it's a synchronous/asynchronous problem. But I have no idea about how to handle it.
Thanks in advance.
I have tested the WebClient part of your code with 2 different URLs http://riktamtech.com and http://google.com. In both cases, the DownloadStringCompleted event is raised. I observed it by placing a break point.
So I suggest you to test again with break points.
I'm trying to create a simple app for my phone that can get data from a website and save to the phone. After I looked for, I knew I have to use webClient for this app. When I code I have a problem that set value for a property in a class.
class data
{
public string temp = "";
public void getContent(string url)
{
var client = new WebClient();
client.DownloadStringCompleted += (s, e) => { /*my problem is right here*/};
client.DownloadStringAsync(new Uri(url));
}
}
For example: e.result = "this is a book" so how can I set "e.result" for "temp"?
just replace
client.DownloadStringCompleted += (s, e) => { /*my problem is right here*/};
with
client.DownloadStringCompleted += (s, e) => {
temp = e.Result;
};
Here is the code-
private void getImageIDs()
{
Uri serviceUri = new Uri("https://api.sqlazureservices.com/NasaService.svc/MER/Images?missionId=1&$format=raw");
WebClient recDownloader = new WebClient();
recDownloader.Headers["$accountKey"] = "<enter your key>";
recDownloader.Headers["$uniqueUserID"] = "<enter your id>";
recDownloader.OpenReadCompleted += new OpenReadCompletedEventHandler(recDownloader_OpenReadCompleted);
recDownloader.OpenReadAsync(serviceUri);
}
private void recDownloader_OpenReadCompleted(object sender, OpenReadCompletedEventArgs e)
{
if (e.Error == null)
{
Stream responseStream = e.Result;
XNamespace ns = "http://www.w3.org/2005/Atom";
XElement marsStuff = XElement.Load(responseStream);
entries = marsStuff.Elements(ns + "entry");
string imageID = (string)entries.ElementAt<XElement>(index).Element(ns + "title").Value;
Console.WriteLine(imageID);
getImage(imageID);
}
}
private void getImage(string ID)
{
Uri serviceUri = new Uri("https://api.sqlazureservices.com/NasaService.svc/MER/Images/" + ID + "?$format=raw");
WebClient imgDownloader = new WebClient();
imgDownloader.Headers["$accountKey"] = "<enter your key>";
imgDownloader.Headers["$uniqueUserID"] = "<enter your id>";
imgDownloader.OpenReadCompleted += new OpenReadCompletedEventHandler(imgDownloader_OpenReadCompleted);
imgDownloader.OpenReadAsync(serviceUri);
}
private void imgDownloader_OpenReadCompleted(object sender, OpenReadCompletedEventArgs e)
{
if (e.Error == null)
{
Stream imageStream = e.Result;
BitmapImage imgsrc = new BitmapImage();
imgsrc.SetSource(imageStream);
MarsImage.Source = imgsrc;
}
}
private void appbar_BackButton_Click(object sender, EventArgs e)
{
if (index > 0)
{
index--;
XNamespace ns = "http://www.w3.org/2005/Atom";
string imageID = (string)entries.ElementAt<XElement>(index).Element(ns + "Title").Value;
getImage(imageID);
}
}
private void appbar_ForwardButton_Click(object sender, EventArgs e)
{
if ( (index + 1) < entries.Count<XElement>())
{
index++;
XNamespace ns = "http://www.w3.org/2005/Atom";
string imageID = (string)entries.ElementAt<XElement>(index).Element(ns + "Title").Value;
getImage(imageID);
}
}
}
I am not seeing any images. Anybody able to get this sample running?
This one? http://msdn.microsoft.com/en-us/magazine/gg232764.aspx
If so, there are some things that had to change to make it work, as the original code was on a preview version of the WP7 tools, as listed in the comments there:
Delete (or comment out) the following lines of code from MainPage.xaml.cs
recDownloader.Headers["$accountKey"] = "<Your account key>";
recDownloader.Headers["$uniqueUserID"] = "<Your user ID>";
imgDownloader.Headers["$accountKey"] = "<Your account key>";
imgDownloader.Headers["$uniqueUserID"] = "<Your user ID>";
Replace the two recDownloader lines of code with:
recDownloader.Credentials = new NetworkCredential("accountKey", "<Your account key>");
Replace the two imgDownloader lines of code with:
imgDownloader.Credentials = new NetworkCredential("accountKey", "<Your account key>");