Develop Reference

Syncing data between two Window in WPF

I am developing an application in WPF. I need to load an instance of the Window class (which I call Win1 here) with which a form is filled. Then, when the Submit button is clicked, Win1 closes and only then can a new Win2 window be loaded (another class, also inherited from Window). The problem is that both of them open and I can not synchronize the data obtained from the first Win1 and pass them to the second Win2. I'm just messing up.
Someone can give me a generic idea indicating the tools and the pattern I need to do the above. For the specifications given to me, it is necessary that Win2 appears only after Win1 has finished its work.
Even though the application is more complex than I described it now, I would like to post some code, but I manage to confuse the ideas of who is reading me, so I tell you that at the moment I'm managing the windows inside the constructor of App.cs, while MainWindow.cs corresponds to Win2 and I created a new class to implement Win1.
public partial class App : Application
{
// Params...
public App()
{
Client = LoadNetwork();
User = LoadUser(Client); // Shows Win1
Games = LoadMinigames();
mainWindow = new MainWindow(User, Games);
Application.Current.MainWindow = mainWindow; // On XAML default is Hidden
mainWindow.Show(); // Shows Win2
}
// Other methods...
}
The biggest problem for me is to pass User data to MainWindow and I do not have many ideas on how to deal with this case.
Update
public partial class MainWindow : Window
{
public UserLoading ul;
public UserRegistering ur;
public User.UserProfile User;
private List<Game.Game> Games;
public Label Username;
public MainWindow(User.UserProfile user, List<Game.Game> games)
{
User = new UserProfile();
InitializeComponent();
User = user;
Games = games;
Username.Content = User.Username;
DrawList(Games);
}
//...
}
I realize I have explained myself a bit 'badly rereading my question several times. So I update it trying to be clearer by reporting here my answer to one of the comments.
The UserLoad method is not blocking, because inside it are instantiated classes that inherit Window (other windows for login and registration in other words) then the flow of execution proceeds and instantiates the MainWindow where naturally the argument "user" will result null because the forms have not been filled yet. I realize now that perhaps I had explained myself badly. The call of Win1 is not blocking and I would like it to return only when the user data is ready to be passed as an argument to Win2.

I have done this in the past. here is my solution:
Set Your Launch Window to Win1. Let It launch. Create a Static Method in App.cs to launch Win2. When Win1 is ok to shut down and you want Win2 to open call App.ShowMainWindow(this) from within Win1.
App.cs
public partial class App : Application
{
static internal void ShowWin2(Win1 win1)
{
Win2 win2 = new Win2();
// Copy Win1 stuff to Win2 here
Application.Current.MainWindow = win2;
win2.Show();
}
}
Win1
public partial class Win1 : Window
{
public Win1()
{
InitializeComponent();
}
private void CloseAndLaunchWin2()
{
App.ShowWin2(this);
this.Close();
}
private void Button_Click(object sender, RoutedEventArgs e)
{
CloseAndLaunchWin2();
}
}

As User Nawed mentioned, you should read into MVVM. Syncing can be achieved by using the same model for two different views.
You could do something like this.
var sharedContext = new MyViewModel();
var viewOne = new MyWindow();
var viewTwo = new MyUserControl();
viewOne.DataContext = viewTwo.DataContext = sharedContext;

.NET application not fully working when using CLR Hosting API

I am loading a .NET application using the ICLRRuntimeHost::ExecuteInDefaultAppDomain method which starts the application up fine. However, the application is using Log4Net with which it should output an info message after starting up, but it never does. It works fine when opening it up normally though, so it must be something with the CLR Hosting environment that makes it unable to function properly, I just don't know what exactly.
Here is the code that does the logging:
using System;
using System.Windows.Forms;
using log4net;
namespace TestApplication
{
public partial class MainForm : Form
{
private static readonly ILog log = LogManager.GetLogger
(MethodBase.GetCurrentMethod().DeclaringType);
public MainForm()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
log.Info("Application has started");
}
}
}

Virdi Unis error when distribute users data

I m using Unis 3.1.1 with Virdi Ac7000 and gathered all employees fingerprints on one device and when trying to distribute users data all over other devices all emp data is transfered very well except the fingerprint
I tried on Access DB and Oracle and the same problem
is there any conf. has to be done or this is a bug in UNIS
I downloaded the VIRDI SDK from
https://drive.google.com/folderview?id=0B06Dxl8hzdKDZllHYlloU3lZbUk&usp=sharing
and tried to run the server within visual studio but also gave me 1002 error and didn't start although the example UCSAPI_Demo.exe in runs very well
using System.Windows.Forms;
using UCSAPICOMLib;
using UCBioBSPCOMLib;
namespace UCSAPI_DemoCSharp
{
public partial class test : Form
{
public UCSAPICOMLib.UCSAPI ucsAPI;
public UCSAPI m_Api = new UCSAPI();
public test()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
m_Api.ServerStart(999, 9870);
MessageBox.Show(m_Api.ErrorCode.ToString("X4"));
}
private void test_Load(object sender, EventArgs e)
{
}
}
}

This error is related to the dlls, your application is not accessing it well.
Pls, try putting all the VIRDI dlls, in the same folder of your application.

WPF Windows Controller

I am having some problems with WPFs.
I have a project that has multiple windows, so to control this windows, I have created a controller class. This controller will have a instance of each windows:
this.mainWindow = new MainWindow();
this.loginWindow = new LoginWindow();
this.registerWindow = new RegisterWindow();
The problem comes when I callback from any of the windows to the controller class and from this controller I want to update the information of the window (for example update the value of a property), the information is not being updated
// In controller
public void login(String email, String pass)
{
....
this.loginWindow.showErrorInPassword();
}
// In LoginWindow
public void showErrorInPassword()
{
this.emailErrorImage.Visibility = System.Windows.Visibility.Visible;
}
... but if I send from the LoginWindow a reference of itself to the login function on the controller, the emailErrorImage will be shown
public void login(String email, String pass, LoginWindow lw)
{
....
lw.showErrorInPassword();
}
Seems that the instance that I have in the controller is not the same as the one that is being displayed when I do this.loginWindow.show()
Can someone tell me what am I doing wrong?

You are going to need to bind the UI objects to a MVVM class to update each window.
Use events to call back to the controller.
Here is a brief example. First create a class to contain event args. Doesn't really have to contain anything. It just differentiates between different delegates. Make it its own class in the namespace so everything has access to it.
public class SomeEventArgs: EventArgs
{
}
Inside the window class:
public event EventHandler<SomeEventArgs> CallBackToController;
protected virtual void OnCallBackEvent(object sender, SomeEventArgse)
{
EventHandler<SomeEventArgs> handle = CallBackToController;
if (handle != null)
{
handle(this, e);
}
}
In the controller class, after instantiating the window assign the event to a method.
this.loginWindow = new LoginWindow();
this.loginWindow.CallBackToController += new EventHandler<SomeEventArgs>(MethodToHandleEvent);
Then the Method must have the same form as expected:
private void MethodToHandleEvent(object sender, SomeEventArgs e)
{
// Do something in response.
}
Now anytime you call OnCallBackEvent(this, new SomeEventArgs()) from the window class, the controller class will catch the event and execute MethodToHandleEvent
For instance:
private void LoginWindowBtn_Click(object sender, RoutedEventArgs e)
{
// Logged in ok, let the controller know.
OnCallBackEvent(this, new SomeEventArgs ());
}
There are a ton of tutorials on this, I think this is a better approach to passing references of windows from window to window.

Strange behavior of static variables in a web site

I prepared a very simple Web site to demonstrate this behavior.
It has one page with one Button and the following code:
public partial class TestStatic : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
Class1.SetValue();
Label1.Text = Class1.st.ToString();
}
}
protected void Button1_Click(object sender, EventArgs e)
{
Label1.Text = Class1.st.ToString();
}
}
and one class:
public class Class1
{
public Class1()
{
}
public static int st = 0;
public static void SetValue()
{
st = 1;
}
}
So when the page is loaded you see in Label1 that st=1. If user clicks on the Buttton that sometimes you can see st=0 and sometimes st=1. In debugging I see that sometimes command
public static int st = 0;
is executed when an user clicks on the Button and this is a reason why st is changed to zero. This behavior I can reproduce in framework 4.5 only: it does not occur in framework 3.5. Can somebody explain me such behavior?

Static data lives per application domain instance. Since the hosting (IIS) can unload application domains between web site calls, static data can be lost.
So, you really shouldn't rely on static in web apps.

static values are shared across all instances of a class inside of a single App Domain.
If you're using IIS Express, your appdomain may be getting recycled more often than you think it is.
reference this: Lifetime of ASP.NET Static Variable