I am trying to add pushpins to a Bing Map. The push pins are got from a JSON feed. I would like to get something like this:
My code does not work for the first time alone and I cant understand why.
My map ViewModel is
public class MapViewModel : INotifyPropertyChanged
{
public static ObservableCollection<PushpinModel> pushpins = new ObservableCollection<PushpinModel>();
public static ObservableCollection<PushpinModel> Pushpins
{
get { return pushpins; }
set { pushpins = value; }
}
}
The Map xaml cs is:
//Map.xaml.cs
public partial class Map : PhoneApplicationPage
{
#define DEBUG_AGENT
private IGeoPositionWatcher<GeoCoordinate> watcher;
private MapViewModel mapViewModel;
public Map()
{
InitializeComponent();
mapViewModel = new MapViewModel();
this.DataContext = mapViewModel;
}
private void page_Loaded(object sender, RoutedEventArgs e)
{
if (watcher == null)
{
#if DEBUG_AGENT
watcher = new Shoporific.My.FakeGPS();
#else
watcher = new GeoCoordinateWatcher(GeoPositionAccuracy.Default);
#endif
}
watcher.Start();
mapViewModel.Center = watcher.Position.Location;
PushpinModel myLocation = new PushpinModel() { Location = mapViewModel.Center, Content = "My Location" };
MapViewModel.Pushpins.Add(myLocation);
myLocation.RefreshNearbyDeals();
watcher.Stop();
}
}
Finally, the PushPinModelClass:
public class PushPinModel
{
public void RefreshNearbyDeals()
{
System.Net.WebClient wc = new WebClient();
wc.OpenReadCompleted += wc_OpenReadCompleted;
wc.OpenReadAsync(" a valid uri");
}
void wc_OpenReadCompleted(object sender, System.Net.OpenReadCompletedEventArgs e)
{
var jsonStream = e.Result;
DataContractJsonSerializer ser = new DataContractJsonSerializer(typeof(Deal[]));
Deal[] deals = (ser.ReadObject(jsonStream) as Deal[]);
if (deals.Any())
{
var currentLocation = MapViewModel.Pushpins.Where(pin => pin.Content == "My Location");
MapViewModel.Pushpins = new ObservableCollection<PushpinModel>();
foreach (var deal in deals)
MapViewModel.Pushpins.Add(new PushpinModel()
{
Content = deal.Store,
Location = new GeoCoordinate(deal.Location.Latitude, deal.Location.Longtitude),
Offers = deal.Offers,
});
}
}
}
I am a bit confused that the Pushpins except "My Location" dont show up only on the first time. They appear as expected the second time onwards(If I navigate back and then move to the Map screen again).
Inside wc_OpenReadCompleted, you are re-instantiating MapViewModel.Pushpins.
Only call the constructor to an ObservableCollection once (in your case within the MainViewModel). Calling it again messes up the binding that I assume you have in your xaml page.
I believe that you should either remove that line in the PushpinViewModel or call MainViewModel.Pushpins.Clear() instead (depending on what you are trying to accomplish).
Related
so what i would like to is setting back some attributes after an Custom Event is finished.
Scenario i have a save BackupDrives Class that does collection of data and then offers a Event to be called after its done.
Changing object properties can be done by button click, what i would like is to set them back to the same value after the event is finished.
Button click does the thing :
private void bbdrives_Click(object sender, RoutedEventArgs e)
{
backup.SaveDrives += OnSavingDrives;
backup.DrivesSave();
Drive_text.Visibility = Visibility.Visible;
drives_progres.Visibility = Visibility.Visible;
drives_progres.IsIndeterminate = true;
}
Now the triggered event method is not able to change the properties back.
private void OnSavingDrives(object sender, DrivesEventArgs e)
{
Directory.CreateDirectory(....);
File.WriteAllLines(e.Something, e.List2ToSave);
File.WriteAllLines(e.Something_lse, e.List1ToSave);
Drive_text.Visibility = Visibility.Collapsed;
drives_progres.Visibility = Visibility.Collapsed;
drives_progres.IsIndeterminate = false;
}
How do i do this. Since this does not work.
And on other thig here to - when i run the GUI i need to click 2 times one the same button to start it all. Done Code Clean + Rebuild. Still the same.
---EDIT---
As for code here you go.
This is a Class for collecting method and event.
public class DrivesEventArgs : EventArgs
{
string MYDOC = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);
const string backup_Drives = "....";
const string backup_Letters = "...";
public List<string> List1ToSave = new List<string>();
public List<string> List2ToSave = new List<string>();
public string SAVE_DRIVE_Letter
{
get
{
string name = Path.Combine(MYDOC, backup_Letters);
return name;
}
}
public string SAVE_DRIVE_Path
{
get
{
string name = Path.Combine(MYDOC, backup_Drives);
return name;
}
}
}
public class DrivesBackup
{
private const string path = "Network";
private List<string> drives_to_save = new List<string>();
private List<string> letters_for_drives = new List<string>();
private RegistryKey reg1, reg2;
public event EventHandler<DrivesEventArgs> SaveDrives;
public void DrivesSave()
{
var data = new DrivesEventArgs();
try
{
if (drives_to_save.Count == 0)
{
reg1 = Registry.CurrentUser.OpenSubKey(path);
string[] mounted_drives = reg1.GetSubKeyNames();
foreach (var drive in mounted_drives)
{ //get all UNC Paths from mounted_drives
string[] getUNC = { path, drive };
string fullUNC = Path.Combine(getUNC);
reg2 = Registry.CurrentUser.OpenSubKey(fullUNC);
string UNCPath = reg2.GetValue("RemotePath").ToString(); //getting UNC PATH
Console.WriteLine(UNCPath);
data.List1ToSave.Add(drive.ToString());
data.List2ToSave.Add(UNCPath);
OnSaveDrives(data);
}
}
}
catch (Exception er)
{
throw er;
}
}
protected virtual void OnSaveDrives(DrivesEventArgs eD)
{
SaveDrives?.Invoke(this, eD);
}
Now here is the MAINWINDOW WPF
public partial class MainWindow : Window
{
DrivesBackup backup = new DrivesBackup();
public MainWindow()
{
InitializeComponent();
}
private void bbdrives_Click(object sender, RoutedEventArgs e)
{
backup.DrivesSave();
backup.SaveDrives += OnSavingDrives;
Drive_text.Visibility = Visibility.Visible;
drives_progres.Visibility = Visibility.Visible;
drives_progres.IsIndeterminate = true;
}
private void OnSavingDrives(object sender, DrivesEventArgs e)
{
Directory.CreateDirectory(System.IO.Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments), #"SEG-Backup"));
File.WriteAllLines(e.SAVE_DRIVE_Path, e.List2ToSave);
File.WriteAllLines(e.SAVE_DRIVE_Letter, e.List1ToSave);
Drive_text.Visibility = Visibility.Collapsed;
drives_progres.Visibility = Visibility.Collapsed;
drives_progres.IsIndeterminate = false;
}
}
Now i do hope this would make some things more clear.
let me describe the situation. Winforms C#
I have xml file with data. I load this data to an user defined class object using Deserialize.
Based on this object with data, I build [in Form] UI: many tabPages of custom controls (textBox, 2 buttons in groupBox). I can also save this user defined class object using Serialize to XML file.
Question:
When I update textBox.Text in Form UI in custom control I do not know how to keep connection with the object with data (Layout layout) and save the updated object with data to XML. The change of text happens only in user custom control TextBox. I want to update data from UI in data object (layout) and then simply save with Serialization.
user class:
public class Layout
{
public string type;
public List<TabPage> TabPageList;
public Layout()
{
this.TabPageList = new List<TabPage>();
}
}
public class TabPage
{
public string text;
public List<ActionGroup> ActionGroupList;
public TabPage()
{
this.ActionGroupList = new List<ActionGroup>();
}
}
public class ActionGroup
{
public string type;
public string text;
public string sourceLocal;
public string sourceRemote;
public ActionGroup()
{
this.type = string.Empty;
this.text = string.Empty;
this.sourceLocal = string.Empty;
this.sourceRemote = string.Empty;
}
}
Custom control:
public partial class ViewActionGroup : UserControl
{
public string type;
public string text;
public string sourceLocal;
public string sourceRemote;
public bool isRemote;
public bool isDone;
public ViewActionGroup()
{
this.type = string.Empty;
this.text = string.Empty;
this.sourceLocal = string.Empty;
this.sourceRemote = string.Empty;
this.isRemote = false;
this.isDone = false;
InitializeComponent();
}
public ViewActionGroup(ActionGroup actionGroup)
{
this.type = actionGroup.type;
this.text = actionGroup.text;
this.sourceLocal = actionGroup.sourceLocal;
this.sourceRemote = actionGroup.sourceRemote;
this.isRemote = false;
this.isDone = false;
InitializeComponent();
groupBox1.Text = text;
button1.Text = type;
button1.Click += new EventHandler(Button_Click);
textBox1.Text = sourceLocal;
textBox1.TextChanged += new EventHandler(textBox1_TextChanged);
}
public void ChangeToRemote()
{
isRemote = true;
textBox1.Text = this.sourceRemote;
}
public void ChangeToLocal()
{
isRemote = false;
textBox1.Text = this.sourceLocal;
}
private void textBox1_TextChanged(object sender, EventArgs e)
{
if (this.isRemote)
{
this.sourceRemote = textBox1.Text;
}
else
{
this.sourceLocal = textBox1.Text;
}
}
Creating UI where I loose connection between UI and data object:
private void CreateLayout(Layout layout)
{
this.Text = layout.type;
TabControl tabControl = new TabControl();
tabControl.Dock = DockStyle.Fill;
int tabCount = 0;
foreach (TabPage tabpage in layout.TabPageList)
{
int actionCount = 0;
tabControl.TabPages.Add(tabpage.text);
foreach (ActionGroup actionGroup in tabpage.ActionGroupList)
{
ViewActionGroup view = new ViewActionGroup(actionGroup);
view.Location = new Point(0, actionCount * view.Height);
tabControl.TabPages[tabCount].Controls.Add(view);
tabControl.TabPages[tabCount].AutoScroll = true;
tabControl.TabPages[tabCount].AutoScrollMinSize = new System.Drawing.Size(tabControl.Width/2,tabControl.Height);
actionCount++;
}
tabCount++;
this.panelMain.Controls.Add(tabControl);
}
}
There are two common ways:
One is a routine WriteDataIntoControls and another ReadDataFromControls where you transfer the data to and from your visible controls manually (advantage: highest degree of control). In this case you'd have to read your object from your XML source, deserialize it into your business object and create all visible controls together with their value. On saving you'd have to transfer all values into your business object and serizalize it after this.
The second is DataBinding (advantage: highest degree of automation). Read here: https://msdn.microsoft.com/en-us/library/ef2xyb33%28v=vs.110%29.aspx?f=255&MSPPError=-2147217396
You can bind to simple values as well as to lists (including navigation) or complex objects.
You find a tutorial here: http://www.codeproject.com/Articles/24656/A-Detailed-Data-Binding-Tutorial
#Shnugo Thank You for your feedback. The tutorial you posted did not help because it is too hard for me but Data Binding topic gave me some clue.
Here easy tutorial in VB actually but simple. It helped me to do it quickly in C#.
https://www.youtube.com/watch?v=jqLQ2K9YY2A
C# solution
class MyObject
{
string name;
public MyObject()
{ }
public string Name
{
get { return name;}
set { name = value; }
}
}
public partial class Form1 : Form
{
MyObject obj = new MyObject();
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
obj.Name = "Lucas";
textBox1.DataBindings.Add("Text", obj, "Name", true, DataSourceUpdateMode.OnPropertyChanged);
}
private void button1_Click(object sender, EventArgs e)
{
label1.Text = obj.Name;
}
}
I developed an application on Windows 10 Universal App who use MVVM but I have a big problem with it.
I would add an ObservableCollection item(created on a second window) to the MVVM and then, show the new item on the ListView of MainPage but it doesn't refresh!
The 2 windows are always open
http://i.stack.imgur.com/WSo6v.jpg
The code of MVVMList.cs
public class MVVMList : INotifyPropertyChanged
{
public event PropertyChangedEventHandler PropertyChanged;
private ObservableCollection<THEFile> onglets_cache = new ObservableCollection<THEFile>();
public ObservableCollection<THEFile> onglets_list
{
get
{
return onglets_cache;
}
set
{
onglets_cache = value;
if (PropertyChanged != null)
PropertyChanged.Invoke(this,
new PropertyChangedEventArgs("onglets_list"));
}
}
public MVVMList()
{
onglets_list = new ObservableCollection<THEFile>();
Fonctions fonctions = new Fonctions();
fonctions.LoadOnglets(onglets_cache);
}
}
The code of the second page(always open) - CreateFile.xaml.cs
private void create_butt_Click(object sender, RoutedEventArgs e)
{
Fonctions fonc = new Fonctions(); MVVMList main = new MVVMList();
fonc.SetupNew(main.onglets_list, "test" + ".php", "");
}
//SetupNew on Fonctions.cs
public async void SetupNew(ObservableCollection<THEFile> list, string name, string content)
{
FolderPicker folderpick = new FolderPicker();
folderpick.ViewMode = PickerViewMode.List;
folderpick.FileTypeFilter.Add(".html"); folderpick.FileTypeFilter.Add(".htm"); folderpick.FileTypeFilter.Add(".HTML");
folderpick.FileTypeFilter.Add(".php"); folderpick.FileTypeFilter.Add(".PHP");
folderpick.FileTypeFilter.Add(".css"); folderpick.FileTypeFilter.Add(".CSS");
folderpick.FileTypeFilter.Add(".js"); folderpick.FileTypeFilter.Add(".JS");
StorageFolder storage_file = await folderpick.PickSingleFolderAsync();
if (storage_file != null)
{
MainPage vm = new MainPage();
list.Add(new THEFile { NameOfFile = name, PathOfFile = storage_file.Path + "\\" + name, CodeOfFile = content, already_opened = false, line = 0 });
string path = storage_file.Path + #"\" + name;
StorageFile file_create = await storage_file.CreateFileAsync(name, CreationCollisionOption.GenerateUniqueName);
Windows.Storage.AccessCache.StorageApplicationPermissions.FutureAccessList.Add(file_create);
SaveOnglets(list);
}
}
And on the MainPage.xaml (always open)
...
<ListView x:Name="onglets" x:FieldModifier="public" ItemTemplate="{StaticResource Templa}" ItemsSource="{Binding onglets_list}" SelectionChanged="onglets_SelectionChanged" Margin="0,117,0,57" Visibility="Visible" ContainerContentChanging="onglets_ContainerContentChanging">
...
Thank you!
In your XAML, try using a Collection View Source.
Add this to the top of your xaml:
<Page.Resources>
<CollectionViewSource x:Name="MakesCollectionViewSource" IsSourceGrouped="True"/>
</Page.Resources>
Set your ListView:
ItemsSource="{Binding Source={StaticResource MakesCollectionViewSource}}"
Then in your code when you have a List of items assign it using
MakesCollectionViewSource.Source = /* Some List<GroupInfoList<object>> that is generated from onglets_list*/
I create my List like this but it may not be relevant because this is to make all of my object names alphabetical:
internal List<GroupInfoList<object>> GetGroupsByLetter()
{
var groups = new List<GroupInfoList<object>>();
var query = from item in MakeList
orderby ((Make)item).MakeName
group item by ((Make)item).MakeName[0] into g
select new { GroupName = g.Key, Items = g };
foreach (var g in query)
{
var info = new GroupInfoList<object>();
info.Key = g.GroupName;
foreach (var item in g.Items)
{
info.Add(item);
}
groups.Add(info);
}
return groups;
}
public class GroupInfoList<T> : List<object>
{
public object Key { get; set; }
public new IEnumerator<object> GetEnumerator()
{
return (System.Collections.Generic.IEnumerator<object>)base.GetEnumerator();
}
}
where MakeList is my observable collection and Make are the objects in the collection and MakeName is a string I am trying to alphabetize
And then call using
MakesCollectionViewSource.Source = GetGroupsByLetter();
If I understand your code and requirements correctly, I think part of the problem is that you "new up" your MVVMList and your MainPage everytime you click the create button.
So, without getting into suggestions about using MVVM Light and an IOC container, you could quickly accomplish what you're trying to do by making your MVVMList class a singleton and having your MainPage use it for a data context. When your other window adds to the MVVMList.onglets collection, it will be immediately reflected in your currently open MainPage. Let me know if you need some code snippets. Good luck!
[Edit below]
I had a few minutes left on lunch, so here is an over-simplified example. Again, without getting into what MVVM is and is not. Personally, I would do this differently, but that would be outside the scope of your question. Full disclosure - this is in WPF, but same logic applies, I just don't have Windows 10 on the PC that I'm using. I also simplified the collection to be of type string. This is not intended to copy/paste into your code as it will not work in your example - but should easily transfer.
MVVMList class:
public class MVVMList: INotifyPropertyChanged
{
//Singleton section
private static MVVMList instance;
private MVVMList() { }
public static MVVMList Instance
{
get
{
if (instance == null)
{
instance = new MVVMList();
}
return instance;
}
}
//end singleton section
private ObservableCollection<string> _onglets = new ObservableCollection<string>();
public ObservableCollection<string> Onglets
{
get { return _onglets; }
set
{
if (_onglets != value)
{
_onglets = value;
if (PropertyChanged != null)
PropertyChanged.Invoke(this,
new PropertyChangedEventArgs("onglets_list"));
}
}
}
//INotify implementation
public event PropertyChangedEventHandler PropertyChanged;
}
MainPage:
<ListView x:Name="onglets" x:FieldModifier="public" ItemsSource="{Binding Onglets}" />
MainPage.cs:
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
this.DataContext = MVVMList.Instance;
Loaded += MainWindow_Loaded;
}
void MainWindow_Loaded(object sender, RoutedEventArgs e)
{
var x = new CreateWindow();
x.Show();
}
}
CreateWindow.cs:
private void CreateButton_Click(object sender, RoutedEventArgs e)
{
if (!string.IsNullOrEmpty(StringTextBox.Text))
{
MVVMList.Instance.Onglets.Add(StringTextBox.Text);
}
}
I needed to implement with a custom-renderer a map in my project developed with Xamarin Forms, here is how I did it:
public class MyMap : Map
{
public MyMap ():base(){ }
}
MapView(Xamarin Forms):
public class MapView:ContentPage
{
List<Filiale> list=jM.ReadData ();
MyMap myMap = new MyMap (//I'd like to pass list here);
var stack = new StackLayout ();
myMap.VerticalOptions = LayoutOptions.FillAndExpand;
myMap.HorizontalOptions = LayoutOptions.FillAndExpand;
stack.Children.Add (myMap);
Content = stack;
}
MapRenderer (Xamarin iOS):
[assembly: ExportRenderer (typeof (MyMap), typeof (MapiOS))]
namespace App.iOS
{
public class MapiOS : MapRenderer
{
private MKMapView NativeMap { get { return (this.NativeView as MapRenderer).Control as MKMapView; } }
public MapiOS ():base()
{
}
protected override void OnElementChanged (ElementChangedEventArgs<View> e)
{
base.OnElementChanged (e);
MyMapDelegate myMapDelegate = new MyMapDelegate ();
NativeMap.Delegate = myMapDelegate;
NativeMap.AddAnnotation(new MKPointAnnotation (){
Title=list[0].nome,
Coordinate = new CLLocationCoordinate2D (42.364260, -71.120824)
});
}
}
In the myMapDelegate class I also handled the click on a button displayed from clicking on the Pins like this:
public override void CalloutAccessoryControlTapped (MKMapView mapView, MKAnnotationView view, UIControl control){
//Call new Page
}
Now when this button is clicked I'd like to get back to Xamarin Forms and create a new page with it. How should I do it? Also How can I pass some object when I create the MyMap object?
Change your MyMap implementation to this
public class MyMap : Map
{
public static readonly BindableProperty LocationsProperty = BindableProperty.Create<MyMap, List<string>>(x => x.Locations, new List<string>());
public static readonly BindableProperty PinTappedCommandProperty = BindableProperty.Create<MyMap, Command>(x=>x.PinTapped, null);
public MyMap(List<string> locations)
{
Locations = locations;
PinTapped = new Command(async (x) =>
{
await Navigation.PopModalAsync();
await Navigation.PushAsync(SomeNewPage(x));
});
}
public List<string> Locations
{
get { return (List<string>)GetValue(LocationsProperty); }
set { SetValue(LocationsProperty, value); }
}
public Command PinTapped
{
get { return (Command) GetValue(PinTappedCommandProperty); }
set { SetValue(PinTappedCommandProperty, value);}
}
}
Now you can access Locations from your MapRenderer by changing it slightly:
public class MapiOS : ViewRenderer<MyMap, MKMapView>
{
protected override void OnElementChanged (ElementChangedEventArgs<MyMap> e)
{
base.OnElementChanged (e);
var map = e.NewElement; // Remember to check for null
var locations = map.Locations;
// Do what you want with locations
var cmd = Map.PinTapped; // Send this along to MyMapDelegate
var nativeMap = new MKMapView(); // Initiate with relevant parameters
SetNativeControl(nativeMap)
MyMapDelegate myMapDelegate = new MyMapDelegate (cmd); // Change constructor here
nativeMap.Delegate = myMapDelegate;
nativeMap.AddAnnotation(new MKPointAnnotation (){
Title=list[0].nome,
Coordinate = new CLLocationCoordinate2D (42.364260, -71.120824)
});
}
I have assumed that you have shown the map as a modal inside a NavigationPage or similar.
You now have the Command, so bring it along to your MyMapDelegate and use
x.PinTapped.Execute("YourParameter");
I just started to use awesomium.
I wanted to understand how to change user-agent and referrer.
i need for example to initialize 5 istance o awesomium webcontrol and for each of them i need different user-agent and different referrer.
this is my simple code
private void newbrowser()
{
browser = new Awesomium.Windows.Forms.WebControl();
browser.Paint += browser_Paint;
browser.Location = new System.Drawing.Point(1, 1);
browser.Name = "webControl";
browser.Size = new System.Drawing.Size(1024, 768);
browser.Source = new System.Uri("https://www.google.com/", System.UriKind.Absolute);
browser.TabIndex = 0;
}
void browser_Paint(object sender, PaintEventArgs e)
{
browser.Paint -= browser_Paint;
System.Collections.Specialized.NameValueCollection myCol =
new System.Collections.Specialized.NameValueCollection();
myCol.Add("Referer", "http://www.yahoo.com");
browser.SetHeaderDefinition("MyHeader", myCol);
browser.AddHeaderRewriteRule("http://*", "MyHeader");
}
private void button1_Click(object sender, EventArgs e)
{
newbrowser();
}
these 2 lines give an error
browser.SetHeaderDefinition("MyHeader", myCol);
browser.AddHeaderRewriteRule("http://*", "MyHeader");
Error 1 'Awesomium.Windows.Forms.WebControl' does not contain a
definition for 'SetHeaderDefinition'
Error 1 'Awesomium.Windows.Forms.WebControl' does not contain a
definition for 'AddHeaderRewriteRule'
thanks for the help
You need to set the user agent of the WebCore that governs your WebControl. This must be done before you create your WebControl.
public WebForm()
{
if ( !WebCore.IsRunning )
WebCore.Initialize( new WebConfig() { UserAgent = "YourUserAgent" } );
InitializeComponent();
}
My solution - is wrapper around WebBrowser, that implements IResourceInterceptor and can navigate with any additional headers:
public class class BrowserWrapper : IResourceInterceptor
{
public BrowserWrapper()
{
WebCore.ResourceInterceptor = this;
//BrowserWrapper can contains WebBrowser or knows how to delegate him Naviagtion (Source property)
}
private readonly ConcurrentDictionary<Uri, string> headers = new ConcurrentDictionary<Uri, string>();
public void Navigate(Uri uri, string additionalHeaders = null)
{
if (additionalHeaders != null) headers.AddOrUpdate(uri, additionalHeaders, (url, h) => h);
//Navigation to browser (WebControl.Source = uri...)
}
ResourceResponse IResourceInterceptor.OnRequest(ResourceRequest request)
{
string h;
if (headers.TryRemove(request.Url, out h))
{
var hs = h.Split(':');
request.AppendExtraHeader(hs[0], hs[1]);
}
return null;
}
bool IResourceInterceptor.OnFilterNavigation(NavigationRequest request)
{
return false;
}
}