Beispiel #1
0
            public override void Load(Uri targetUri, Uri currentUri)
            {
                //tamper protection
                Boolean isMatchRequired = targetUri.OriginalString.Contains(Constants.ADDNEW) && targetUri.OriginalString.Contains(Constants.TRACKING_KEY);

                try
                {
                    PersitableScreen  viewmodel;
                    _conductor.ViewModels.TryGetValue(targetUri.OriginalString, out viewmodel);

                    if (isMatchRequired && viewmodel == null)
                    {
                        throw new InvalidOperationException("Uri missing from cache");
                    }

                    if (viewmodel != null)
                    {

                        Object result = viewmodel.GetView();
                        if (result is Uri)
                            base.Complete((Uri)result);
                        else
                            base.Complete(result);
                    }
                    else
                    {
                        _result = this.Loader.BeginLoad(targetUri, currentUri, (res) =>
                        {
                            try
                            {
                                LoadResult loadResult = this.Loader.EndLoad(res);
                                if (loadResult.RedirectUri != null)
                                    base.Complete(loadResult.RedirectUri);
                                else
                                {
                                    DependencyObject content = loadResult.LoadedContent as DependencyObject;
                                    if (content != null)
                                    {
                                        String currentOriginalString = null;
                                        if (currentUri == null || String.IsNullOrWhiteSpace(currentUri.OriginalString))
                                        {
                                            currentOriginalString = Constants.HOME_URI_STRING;
                                        }
                                        else
                                        {
                                            currentOriginalString = currentUri.OriginalString;
                                        }

                                        String targetUriString = targetUri.OriginalString;
                                        String trackingKey = String.Empty;
                                        if (targetUri.OriginalString.EndsWith(Constants.ADD_NEW_QUERYSTRING))
                                        {
                                            trackingKey = Guid.NewGuid().ToString();
                                            targetUriString = String.Concat(targetUriString.Replace(Constants.ADD_NEW_QUERYSTRING, String.Empty), Constants.TRACKING_KEY_QUERYSTRING, trackingKey);
                                        }

                                        ViewLocator.InitializeComponent(content);

                                        var vm = ViewModelLocator.LocateForView(content);

                                        if (vm == null)
                                        {
                                            // to avoid shellviewmodel to be set on cild screens datacontext property
                                            vm = new PersitableScreen();
                                        }

                                        viewmodel = vm as PersitableScreen;

                                        if (viewmodel != null)
                                        {
                                            viewmodel.ViewType = content.GetType();
                                            viewmodel.UriString = targetUriString;
                                            viewmodel.ParentUriOriginalString = currentOriginalString;
                                            viewmodel.TrackingKey = trackingKey;

                                            // TODO: Add query string
                                            Uri auri = new Uri("dummy://" + targetUriString, UriKind.Absolute);
                                            string query = auri.Query;

                                            //    _conductor.NavigationService.TryInjectQueryString(viewmodel,content);

                                        }

                                        // dont rebind when you're bound to yourself
                                        if (vm != content)
                                            ViewModelBinder.Bind(vm, content, null);

                                        base.Complete(content);
                                    }
                                    else
                                    {
                                        throw new InvalidOperationException("LoadedContent was null or not a DependencyObject");
                                    }
                                    return;
                                }

                            }
                            catch (Exception e)
                            {
                                base.Error(e);
                                return;
                            }
                        }, null);
                    }
                }
                catch (Exception e)
                {
                    base.Error(e);
                    return;
                }
            }
Beispiel #2
0
            public override void Load(Uri targetUri, Uri currentUri)
            {
                //tamper protection
                Boolean isMatchRequired = targetUri.OriginalString.Contains(Constants.ADDNEW) && targetUri.OriginalString.Contains(Constants.TRACKING_KEY);

                try
                {
                    PersitableScreen viewmodel;
                    _conductor.ViewModels.TryGetValue(targetUri.OriginalString, out viewmodel);

                    if (isMatchRequired && viewmodel == null)
                    {
                        throw new InvalidOperationException("Uri missing from cache");
                    }

                    if (viewmodel != null)
                    {
                        Object result = viewmodel.GetView();
                        if (result is Uri)
                        {
                            base.Complete((Uri)result);
                        }
                        else
                        {
                            base.Complete(result);
                        }
                    }
                    else
                    {
                        _result = this.Loader.BeginLoad(targetUri, currentUri, (res) =>
                        {
                            try
                            {
                                LoadResult loadResult = this.Loader.EndLoad(res);
                                if (loadResult.RedirectUri != null)
                                {
                                    base.Complete(loadResult.RedirectUri);
                                }
                                else
                                {
                                    DependencyObject content = loadResult.LoadedContent as DependencyObject;
                                    if (content != null)
                                    {
                                        String currentOriginalString = null;
                                        if (currentUri == null || String.IsNullOrWhiteSpace(currentUri.OriginalString))
                                        {
                                            currentOriginalString = Constants.HOME_URI_STRING;
                                        }
                                        else
                                        {
                                            currentOriginalString = currentUri.OriginalString;
                                        }

                                        String targetUriString = targetUri.OriginalString;
                                        String trackingKey     = String.Empty;
                                        if (targetUri.OriginalString.EndsWith(Constants.ADD_NEW_QUERYSTRING))
                                        {
                                            trackingKey     = Guid.NewGuid().ToString();
                                            targetUriString = String.Concat(targetUriString.Replace(Constants.ADD_NEW_QUERYSTRING, String.Empty), Constants.TRACKING_KEY_QUERYSTRING, trackingKey);
                                        }


                                        ViewLocator.InitializeComponent(content);

                                        var vm = ViewModelLocator.LocateForView(content);

                                        if (vm == null)
                                        {
                                            // to avoid shellviewmodel to be set on cild screens datacontext property
                                            vm = new PersitableScreen();
                                        }

                                        viewmodel = vm as PersitableScreen;

                                        if (viewmodel != null)
                                        {
                                            viewmodel.ViewType  = content.GetType();
                                            viewmodel.UriString = targetUriString;
                                            viewmodel.ParentUriOriginalString = currentOriginalString;
                                            viewmodel.TrackingKey             = trackingKey;

                                            // TODO: Add query string
                                            Uri auri     = new Uri("dummy://" + targetUriString, UriKind.Absolute);
                                            string query = auri.Query;

                                            //    _conductor.NavigationService.TryInjectQueryString(viewmodel,content);
                                        }

                                        // dont rebind when you're bound to yourself
                                        if (vm != content)
                                        {
                                            ViewModelBinder.Bind(vm, content, null);
                                        }

                                        base.Complete(content);
                                    }
                                    else
                                    {
                                        throw new InvalidOperationException("LoadedContent was null or not a DependencyObject");
                                    }
                                    return;
                                }
                            }
                            catch (Exception e)
                            {
                                base.Error(e);
                                return;
                            }
                        }, null);
                    }
                }
                catch (Exception e)
                {
                    base.Error(e);
                    return;
                }
            }