Returning Value From Window To Class WPF

Within a method in my class I call Login.Show(), which is a Login Window. I would like the window to pass the email back to the class when the Login button is clicked, without creating a new instance of the class.

Is there any way to do this?

Currently I have

Login loginWindow;

public void AppStartup {

    loginWindow = new Login();

    loginWindow.Show();

    //in this instance I'd like the email to be returned here

Within the Login.xaml.cs

public void Login_Click(object sender, RoutedEventArgs e)

{

    string email;

    try {

        email = InputEmail.Text;

        //ideally I would like to return email to AppStartup without

        //using new AppStartup(); , rather back in the same instance

    }

    catch (Exception ex)

    {

        Console.WriteLine(ex.Message); 

    }

}

asked Nov 20 '18 at 2:04

Explorex

387

2

i would read up on mvvm & binding for wpf

– JohnB
Nov 20 '18 at 2:09

Just add a public property to the LoginWindow class and set it in the Login_Click handler

– Jon
Nov 20 '18 at 2:51

you know, that it is tricky to use Console.WriteLine(ex.Message); method from WPF (or even WinForms) application?

– vasily.sib
Nov 20 '18 at 3:14

You may want to use ShowDialog() instead of Show(). Then you can access the member variable @Jon suggest after the call.

– Klaus Gütter
Nov 20 '18 at 5:13

add a comment |

Is there any way to do this?

Currently I have

Login loginWindow;

public void AppStartup {

    loginWindow = new Login();

    loginWindow.Show();

    //in this instance I'd like the email to be returned here

Within the Login.xaml.cs

public void Login_Click(object sender, RoutedEventArgs e)

{

    string email;

    try {

        email = InputEmail.Text;

        //ideally I would like to return email to AppStartup without

        //using new AppStartup(); , rather back in the same instance

    }

    catch (Exception ex)

    {

        Console.WriteLine(ex.Message); 

    }

}

asked Nov 20 '18 at 2:04

Explorex

387

2

i would read up on mvvm & binding for wpf

– JohnB
Nov 20 '18 at 2:09

Just add a public property to the LoginWindow class and set it in the Login_Click handler

– Jon
Nov 20 '18 at 2:51

you know, that it is tricky to use Console.WriteLine(ex.Message); method from WPF (or even WinForms) application?

– vasily.sib
Nov 20 '18 at 3:14

You may want to use ShowDialog() instead of Show(). Then you can access the member variable @Jon suggest after the call.

– Klaus Gütter
Nov 20 '18 at 5:13

add a comment |

Is there any way to do this?

Currently I have

Login loginWindow;

public void AppStartup {

    loginWindow = new Login();

    loginWindow.Show();

    //in this instance I'd like the email to be returned here

Within the Login.xaml.cs

public void Login_Click(object sender, RoutedEventArgs e)

{

    string email;

    try {

        email = InputEmail.Text;

        //ideally I would like to return email to AppStartup without

        //using new AppStartup(); , rather back in the same instance

    }

    catch (Exception ex)

    {

        Console.WriteLine(ex.Message); 

    }

}

asked Nov 20 '18 at 2:04

Explorex

387

Is there any way to do this?

Currently I have

Login loginWindow;

public void AppStartup {

    loginWindow = new Login();

    loginWindow.Show();

    //in this instance I'd like the email to be returned here

Within the Login.xaml.cs

public void Login_Click(object sender, RoutedEventArgs e)

{

    string email;

    try {

        email = InputEmail.Text;

        //ideally I would like to return email to AppStartup without

        //using new AppStartup(); , rather back in the same instance

    }

    catch (Exception ex)

    {

        Console.WriteLine(ex.Message); 

    }

}

c# wpf return-value

asked Nov 20 '18 at 2:04

Explorex

387

asked Nov 20 '18 at 2:04

Explorex

387

asked Nov 20 '18 at 2:04

Explorex

387

asked Nov 20 '18 at 2:04

Explorex

387

asked Nov 20 '18 at 2:04

Explorex

387

2

i would read up on mvvm & binding for wpf

– JohnB
Nov 20 '18 at 2:09

Just add a public property to the LoginWindow class and set it in the Login_Click handler

– Jon
Nov 20 '18 at 2:51

you know, that it is tricky to use Console.WriteLine(ex.Message); method from WPF (or even WinForms) application?

– vasily.sib
Nov 20 '18 at 3:14

You may want to use ShowDialog() instead of Show(). Then you can access the member variable @Jon suggest after the call.

– Klaus Gütter
Nov 20 '18 at 5:13

add a comment |

2

i would read up on mvvm & binding for wpf

– JohnB
Nov 20 '18 at 2:09

Just add a public property to the LoginWindow class and set it in the Login_Click handler

– Jon
Nov 20 '18 at 2:51

you know, that it is tricky to use Console.WriteLine(ex.Message); method from WPF (or even WinForms) application?

– vasily.sib
Nov 20 '18 at 3:14

You may want to use ShowDialog() instead of Show(). Then you can access the member variable @Jon suggest after the call.

– Klaus Gütter
Nov 20 '18 at 5:13

i would read up on mvvm & binding for wpf

– JohnB
Nov 20 '18 at 2:09

Just add a public property to the LoginWindow class and set it in the Login_Click handler

– Jon
Nov 20 '18 at 2:51

you know, that it is tricky to use Console.WriteLine(ex.Message); method from WPF (or even WinForms) application?

– vasily.sib
Nov 20 '18 at 3:14

You may want to use ShowDialog() instead of Show(). Then you can access the member variable @Jon suggest after the call.

– Klaus Gütter
Nov 20 '18 at 5:13

add a comment |

1 Answer
1

active

oldest

votes

You could call ShowDialog() instead of Show() to display the window and then access the Text property of the InputEmail control directly:

loginWindow = new Login();

loginWindow.ShowDialog();

string email = loginWindow.InputEmail.Text;

Unlike Show(), ShowDialog() won't return until the window has been closed.

Or you could add a property to the Login window or its DataContext, and set this one when the button is clicked.

public string Email { get; set; }



public void Login_Click(object sender, RoutedEventArgs e)

{

    Email = InputEmail.Text;

}

string email = loginWindow.Email;

answered Nov 20 '18 at 10:51

mm8

82.4k81831

I tried that but it doesnt seem to work, it doesnt wait for Login_Click so 'email' value is always nothing. Do I need to use a while loop and wait for Login click to be triggered?

– Explorex
Nov 20 '18 at 11:06

You need to call ShowDialog() instead of Show(). Did you really try this?

– mm8
Nov 20 '18 at 12:05

Yes, but it runs through showdialog and email =window.email instantly and so it never gives it a chance to update, as in wait for login click to occur. I almost need it to be like await login click ? Does this make sense?

– Explorex
Nov 20 '18 at 12:12

No, ShowDialog doesn't return until loginWindow has been closed. And you can't click on a button after a window has been closed...

– mm8
Nov 20 '18 at 12:17

1

It needs to close before the method that calls ShowDialog continues to the next line...if you don't want this you could raise an event from the login window and handle this in your app class.

– mm8
Nov 20 '18 at 12:35

|
show 1 more comment

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1 Answer
1

active

oldest

votes

1 Answer
1

active

oldest

votes

You could call ShowDialog() instead of Show() to display the window and then access the Text property of the InputEmail control directly:

loginWindow = new Login();

loginWindow.ShowDialog();

string email = loginWindow.InputEmail.Text;

Unlike Show(), ShowDialog() won't return until the window has been closed.

Or you could add a property to the Login window or its DataContext, and set this one when the button is clicked.

public string Email { get; set; }



public void Login_Click(object sender, RoutedEventArgs e)

{

    Email = InputEmail.Text;

}

string email = loginWindow.Email;

answered Nov 20 '18 at 10:51

mm8

82.4k81831

I tried that but it doesnt seem to work, it doesnt wait for Login_Click so 'email' value is always nothing. Do I need to use a while loop and wait for Login click to be triggered?

– Explorex
Nov 20 '18 at 11:06

You need to call ShowDialog() instead of Show(). Did you really try this?

– mm8
Nov 20 '18 at 12:05

Yes, but it runs through showdialog and email =window.email instantly and so it never gives it a chance to update, as in wait for login click to occur. I almost need it to be like await login click ? Does this make sense?

– Explorex
Nov 20 '18 at 12:12

No, ShowDialog doesn't return until loginWindow has been closed. And you can't click on a button after a window has been closed...

– mm8
Nov 20 '18 at 12:17

1

It needs to close before the method that calls ShowDialog continues to the next line...if you don't want this you could raise an event from the login window and handle this in your app class.

– mm8
Nov 20 '18 at 12:35

|
show 1 more comment

You could call ShowDialog() instead of Show() to display the window and then access the Text property of the InputEmail control directly:

loginWindow = new Login();

loginWindow.ShowDialog();

string email = loginWindow.InputEmail.Text;

Unlike Show(), ShowDialog() won't return until the window has been closed.

Or you could add a property to the Login window or its DataContext, and set this one when the button is clicked.

public string Email { get; set; }



public void Login_Click(object sender, RoutedEventArgs e)

{

    Email = InputEmail.Text;

}

string email = loginWindow.Email;

answered Nov 20 '18 at 10:51

mm8

82.4k81831

I tried that but it doesnt seem to work, it doesnt wait for Login_Click so 'email' value is always nothing. Do I need to use a while loop and wait for Login click to be triggered?

– Explorex
Nov 20 '18 at 11:06

You need to call ShowDialog() instead of Show(). Did you really try this?

– mm8
Nov 20 '18 at 12:05

Yes, but it runs through showdialog and email =window.email instantly and so it never gives it a chance to update, as in wait for login click to occur. I almost need it to be like await login click ? Does this make sense?

– Explorex
Nov 20 '18 at 12:12

No, ShowDialog doesn't return until loginWindow has been closed. And you can't click on a button after a window has been closed...

– mm8
Nov 20 '18 at 12:17

1

It needs to close before the method that calls ShowDialog continues to the next line...if you don't want this you could raise an event from the login window and handle this in your app class.

– mm8
Nov 20 '18 at 12:35

|
show 1 more comment

You could call ShowDialog() instead of Show() to display the window and then access the Text property of the InputEmail control directly:

loginWindow = new Login();

loginWindow.ShowDialog();

string email = loginWindow.InputEmail.Text;

Unlike Show(), ShowDialog() won't return until the window has been closed.

Or you could add a property to the Login window or its DataContext, and set this one when the button is clicked.

public string Email { get; set; }



public void Login_Click(object sender, RoutedEventArgs e)

{

    Email = InputEmail.Text;

}

string email = loginWindow.Email;

answered Nov 20 '18 at 10:51

mm8

82.4k81831

You could call ShowDialog() instead of Show() to display the window and then access the Text property of the InputEmail control directly:

loginWindow = new Login();

loginWindow.ShowDialog();

string email = loginWindow.InputEmail.Text;

Unlike Show(), ShowDialog() won't return until the window has been closed.

Or you could add a property to the Login window or its DataContext, and set this one when the button is clicked.

public string Email { get; set; }



public void Login_Click(object sender, RoutedEventArgs e)

{

    Email = InputEmail.Text;

}

string email = loginWindow.Email;

answered Nov 20 '18 at 10:51

mm8

82.4k81831

answered Nov 20 '18 at 10:51

mm8

82.4k81831

answered Nov 20 '18 at 10:51

mm8

82.4k81831

answered Nov 20 '18 at 10:51

mm8

82.4k81831

I tried that but it doesnt seem to work, it doesnt wait for Login_Click so 'email' value is always nothing. Do I need to use a while loop and wait for Login click to be triggered?

– Explorex
Nov 20 '18 at 11:06

You need to call ShowDialog() instead of Show(). Did you really try this?

– mm8
Nov 20 '18 at 12:05

Yes, but it runs through showdialog and email =window.email instantly and so it never gives it a chance to update, as in wait for login click to occur. I almost need it to be like await login click ? Does this make sense?

– Explorex
Nov 20 '18 at 12:12

No, ShowDialog doesn't return until loginWindow has been closed. And you can't click on a button after a window has been closed...

– mm8
Nov 20 '18 at 12:17

1

It needs to close before the method that calls ShowDialog continues to the next line...if you don't want this you could raise an event from the login window and handle this in your app class.

– mm8
Nov 20 '18 at 12:35

|
show 1 more comment

I tried that but it doesnt seem to work, it doesnt wait for Login_Click so 'email' value is always nothing. Do I need to use a while loop and wait for Login click to be triggered?

– Explorex
Nov 20 '18 at 11:06

You need to call ShowDialog() instead of Show(). Did you really try this?

– mm8
Nov 20 '18 at 12:05

Yes, but it runs through showdialog and email =window.email instantly and so it never gives it a chance to update, as in wait for login click to occur. I almost need it to be like await login click ? Does this make sense?

– Explorex
Nov 20 '18 at 12:12

No, ShowDialog doesn't return until loginWindow has been closed. And you can't click on a button after a window has been closed...

– mm8
Nov 20 '18 at 12:17

1

It needs to close before the method that calls ShowDialog continues to the next line...if you don't want this you could raise an event from the login window and handle this in your app class.

– mm8
Nov 20 '18 at 12:35

I tried that but it doesnt seem to work, it doesnt wait for Login_Click so 'email' value is always nothing. Do I need to use a while loop and wait for Login click to be triggered?

– Explorex
Nov 20 '18 at 11:06

You need to call ShowDialog() instead of Show(). Did you really try this?

– mm8
Nov 20 '18 at 12:05

Yes, but it runs through showdialog and email =window.email instantly and so it never gives it a chance to update, as in wait for login click to occur. I almost need it to be like await login click ? Does this make sense?

– Explorex
Nov 20 '18 at 12:12

No, ShowDialog doesn't return until loginWindow has been closed. And you can't click on a button after a window has been closed...

– mm8
Nov 20 '18 at 12:17

It needs to close before the method that calls ShowDialog continues to the next line...if you don't want this you could raise an event from the login window and handle this in your app class.

– mm8
Nov 20 '18 at 12:35

|
show 1 more comment

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