I am developing a sample Twitter app for Windows phone 7. In my code to display some details of user, used the following code.
void ShowProfile()
{
WebClient client = new WebClient();
client.DownloadStringCompleted += new DownloadStringCompletedEventHandler(Profile_DownloadCompleted);
client.DownloadStringAsync(new Uri("http://api.twitter.com/1/users/show.xml?user_id=" + this.id));
}
void Profile_DownloadCompleted(object sender, DownloadStringCompletedEventArgs e)
{
if (e.Error != null)
{ return; }
if (e.Result == null) MessageBox.Show("NUlllllllllll");
XElement Profile = XElement.Parse(e.Result);
var ProfileDetails = (from profile in Profile.Descendants("user")
select new UserProfile
{
UserName = profile.Element("screen_name").Value,
ImageSource = profile.Element("profile_image_url").Value,
Location = profile.Element("location").Value,
TweetsCount = profile.Element("statuses_count").Value,
}).FirstOrDefault();
LayoutRoot.DataContext = ProfileDetails;
}
Here, LayoutRoot is the Grid name. But the data binding doesn't work.
Infact, when kept a Break point it seems there is no data in the ProfileDetails object. But I could observe that e.Result contains the required data in the XML format.
Can any body figureout where I am going wrong??
Thanks in advance.
You have used XElement.Parse so Profile represents the single root <user> that API request would have returned. You are then trying to look for user elements inside it which of course makes no sense.
Try XDocument.Parse instead. Also does it really make any sense assigning a IEnumerable<UserProfile> to the data context when that list can only ever contain 1 entry?
Related
I've tried a few different ways to do this and each way has a piece of code I am just not getting right. I need to update a custom field UsrCustomerShipAccount in Customer Locations if it is updated in the Customer Delivery Tab. I tried SetValueExt and creating a graph instance. Sorry about the dumb question.
The way that seemed to get me the closest is below:
protected void LocationExtAddress_UsrCustomerShipAccnt_FieldUpdated(PXCache cache, PXFieldUpdatedEventArgs e, PXFieldUpdated InvokeBaseHandler)
{
if(InvokeBaseHandler != null)
InvokeBaseHandler(cache, e);
var row = (LocationExtAddress)e.Row;
if (row == null) return;
PXSelectBase<Location> locationObj = new PXSelect<Location, Where<Location.bAccountID, Equal<Required<Location.bAccountID>>>>(Base);
Location deliveryLocation = locationObj.Select(row.LocationBAccountID);
var locationExt = PXCache<Location>.GetExtension<LocationExt>(location); <-- This generates error that there is no LocationExt.
deliveryLocation.Cache.SetValueExt(deliveryLocation, "UsrCustomerShipAccount", -->This needs to be the value that changed LocationExtAddress.UsrCustomerShipAccount but I don't see how to get this<--);
deliveryLocation.Cache.IsDirty = true;
deliveryLocation.Update(deliveryLocation); <--I don't know if this doesn't work because it is wrong or if it is because "UsrCustomerShipAccount" is not in deliverLocation.
}
You have
var locationExt = PXCache<Location>.GetExtension<LocationExt>(location);
shouldn't this be
var locationExt = PXCache<Location>.GetExtension<LocationExt>(deliveryLocation );
?
I have found some plugin code on the web that enables me to get the entity ID and the object type code for an entity in a plugin. The plugin is fired on RetrieveMultiple on activitypointer. The code lets me get the id and object code of the entity that is currently being viewed (which is displaying the activities grid which is firing the plugin).
This code works fine when using the web interface. However I need it to also work in the Outlook preview pane and currently it does not. The activities grid in the Outlook preview pane just says "an error has occurred". Below is the code that the plugin is using to get the details from the web header.
internal static Dictionary<string, string> GetHeaderFields(HttpContext webcontext, string objectTypeCode, string objectId)
{
Dictionary<string, string> fields = new Dictionary<string, string>();
string callerentitytype = null;
string callerentityidstring = null;
try
{
// Activities Navigation Pane
if (new List<string>(webcontext.Request.Params.AllKeys).Contains("oType"))
{
callerentitytype = webcontext.Request.Params["oType"];
callerentityidstring = webcontext.Request.Params["oId"];
}
// Activities Sub Grid
else
{
string requeststring = webcontext.Request.UrlReferrer.Query;
requeststring = requeststring.Substring(1);
string[] parts = requeststring.Split(new string[] { "=", "&" }, StringSplitOptions.RemoveEmptyEntries);
for (int i = 0; i < parts.Length - 1; i++)
if (parts[i].ToLower() == "otype" || parts[i].ToLower() == "etc")
callerentitytype = parts[i + 1];
else if (parts[i].ToLower() == "oid" || parts[i].ToLower() == "id")
callerentityidstring = parts[i + 1];
}
fields.Add(objectTypeCode, callerentitytype);
fields.Add(objectId, callerentityidstring);
}
catch (Exception ex)
{
throw new Plugin.LoggableException(string.Format("Failed to obtain header information; {0}", ex.Message), ex.InnerException);
}
return fields;
}
The reason is that webcontext.Request.UrlReferrer is NULL. Is there anywhere else I can get this info of the 'calling' entity? (Not the activity sub grid that is triggering the plugin, but the actual parent entity that the sub grid is on).
Thanks for any help or direction with this.
This might work. Each of the activitypointers that are returned should all be "regarding" the same record (if in a sub grid). If you take say the 1st one and examine the regardingobjectid property, that should be an entity reference which will give you the logical name of the parent and it's guid. If that works, it will work across all clients (in theory anyway).
I trying to apply some linq statements to all my Get Web api commands. I figured I could do this using an ActionFilterAttribute.
I'm basically adding $select support in web api since its currently not supported. I'm not sure where to get the IQueryable results. I believe I need it before sql execution happens but after Get function has returned the IQueryable result. Any help would be great. I'm trying something similiar to this post, but his idea will not work because HttpResponseMessage response = actionExecutedContext.Result; is no longer in RC.
Thanks
Nick
solution
public override void OnActionExecuted(System.Web.Http.Filters.HttpActionExecutedContext actionExecutedContext)
{
HttpRequestMessage request = actionExecutedContext.Request;
HttpResponseMessage response = actionExecutedContext.Response;
IQueryable obj;
if (response != null && response.TryGetContentValue(out obj) && request.RequestUri.ParseQueryString()["$select"] != null)
{
System.Collections.Specialized.NameValueCollection QueryItems = request.RequestUri.ParseQueryString();
string select = QueryItems["$select"];
if (!string.IsNullOrWhiteSpace(select))
{
obj = obj.Select(string.Format("new ({0})", select));
}
//
//this should be generic not hard coded for Json
//
string json = JsonConvert.SerializeObject(obj, Newtonsoft.Json.Formatting.Indented);
actionExecutedContext.Response = actionExecutedContext.Request.CreateResponse();
actionExecutedContext.Response.Content = new StringContent(json);
actionExecutedContext.Response.Content.Headers.Clear();
actionExecutedContext.Response.Content.Headers.Add("Content-Type", "application/json");
actionExecutedContext.Response.StatusCode = System.Net.HttpStatusCode.OK;
}
}
see the original post above. I added the solution to the bottom.
Currently I'm developing an OAuth2 authorization server using DotNetOpenAuth CTP version. My authorization server is in asp.net MVC3, and it's based on the sample provided by the library. Everything works fine until the app reaches the point where the user authorizes the consumer client.
There's an action inside my OAuth controller which takes care of the authorization process, and is very similar to the equivalent action in the sample:
[Authorize, HttpPost, ValidateAntiForgeryToken]
public ActionResult AuthorizeResponse(bool isApproved)
{
var pendingRequest = this.authorizationServer.ReadAuthorizationRequest();
if (pendingRequest == null)
{
throw new HttpException((int)HttpStatusCode.BadRequest, "Missing authorization request.");
}
IDirectedProtocolMessage response;
if (isApproved)
{
var client = MvcApplication.DataContext.Clients.First(c => c.ClientIdentifier == pendingRequest.ClientIdentifier);
client.ClientAuthorizations.Add(
new ClientAuthorization
{
Scope = OAuthUtilities.JoinScopes(pendingRequest.Scope),
User = MvcApplication.LoggedInUser,
CreatedOn = DateTime.UtcNow,
});
MvcApplication.DataContext.SaveChanges();
response = this.authorizationServer.PrepareApproveAuthorizationRequest(pendingRequest, User.Identity.Name);
}
else
{
response = this.authorizationServer.PrepareRejectAuthorizationRequest(pendingRequest);
}
return this.authorizationServer.Channel.PrepareResponse(response).AsActionResult();
}
Everytime the program reaches this line:
this.authorizationServer.Channel.PrepareResponse(response).AsActionResult();
The system throws an exception which I have researched with no success. The exception is the following:
Only parameterless constructors and initializers are supported in LINQ to Entities.
The stack trace: http://pastebin.com/TibCax2t
The only thing I've done differently from the sample is that I used entity framework's code first approach, an I think the sample was done using a designer which autogenerated the entities.
Thank you in advance.
If you started from the example, the problem Andrew is talking about stays in DatabaseKeyNonceStore.cs. The exception is raised by one on these two methods:
public CryptoKey GetKey(string bucket, string handle) {
// It is critical that this lookup be case-sensitive, which can only be configured at the database.
var matches = from key in MvcApplication.DataContext.SymmetricCryptoKeys
where key.Bucket == bucket && key.Handle == handle
select new CryptoKey(key.Secret, key.ExpiresUtc.AsUtc());
return matches.FirstOrDefault();
}
public IEnumerable<KeyValuePair<string, CryptoKey>> GetKeys(string bucket) {
return from key in MvcApplication.DataContext.SymmetricCryptoKeys
where key.Bucket == bucket
orderby key.ExpiresUtc descending
select new KeyValuePair<string, CryptoKey>(key.Handle, new CryptoKey(key.Secret, key.ExpiresUtc.AsUtc()));
}
I've resolved moving initializations outside of the query:
public CryptoKey GetKey(string bucket, string handle) {
// It is critical that this lookup be case-sensitive, which can only be configured at the database.
var matches = from key in db.SymmetricCryptoKeys
where key.Bucket == bucket && key.Handle == handle
select key;
var match = matches.FirstOrDefault();
CryptoKey ck = new CryptoKey(match.Secret, match.ExpiresUtc.AsUtc());
return ck;
}
public IEnumerable<KeyValuePair<string, CryptoKey>> GetKeys(string bucket) {
var matches = from key in db.SymmetricCryptoKeys
where key.Bucket == bucket
orderby key.ExpiresUtc descending
select key;
List<KeyValuePair<string, CryptoKey>> en = new List<KeyValuePair<string, CryptoKey>>();
foreach (var key in matches)
en.Add(new KeyValuePair<string, CryptoKey>(key.Handle, new CryptoKey(key.Secret, key.ExpiresUtc.AsUtc())));
return en.AsEnumerable<KeyValuePair<string,CryptoKey>>();
}
I'm not sure that this is the best way, but it works!
It looks like your ICryptoKeyStore implementation may be attempting to store CryptoKey directly, but it's not a class that is compatible with the Entity framework (due to not have a public default constructor). Instead, define your own entity class for storing the data in CryptoKey and your ICryptoKeyStore is responsible to transition between the two data types for persistence and retrieval.
Ok right now I have an object containing 3 strings, along with setters and getters. Now I have two questions -
First, I'm new to C# is there any way to optimize the following methods and make them more efficient?
void getSearchResults(object sender, RoutedEventArgs e)
{
string baseURL = "http://api.search.live.net/xml.aspx?Appid=<MyAPPID>&query=%22";
string companyName = ((TaxiCompany)sender).CoName;
string formatAndKey = "%22&sources=web";
WebClient c = new WebClient();
c.DownloadStringAsync(new Uri(baseURL + companyName + formatAndKey));
c.DownloadStringCompleted += new DownloadStringCompletedEventHandler(findTotalResults);
}
//Parses search XML result to find number of results
void findTotalResults(object sender, DownloadStringCompletedEventArgs e)
{
lock (this)
{
string s = e.Result;
XmlReader reader = XmlReader.Create(new MemoryStream(System.Text.UTF8Encoding.UTF8.GetBytes(s)));
String results = "";
while (reader.Read())
{
if (reader.NodeType == XmlNodeType.Element)
{
if (reader.Name.Equals("web:Total"))
{
results = reader.ReadInnerXml();
break;
}
}
}
}
}
Second, I'm initializing an object - new Taxi Company (String name, String Phone, String Results). I've got name and number and I need to call the above two functions to get noOfResults so that I can initialize the object. However, I seem to run into a bunch of issues with the event handlers.
I've primarily been a web dev, so there might be something really basic I'm missing here. I have a feeling setting up the bing methods to return a string back to the constructor might be th easiest, but not quite sure how.
First of all, you don't need the lock on the main page. Then, I would say that your XmlReader block should be replaced with the LINQ-to-XML variation called XDocument, that will allow you to access the XML document with a single, elegant line:
XDocument doc = XDocument.Parse(e.Result);
Once you have the document, you can check whether it contains a specific XNode.