WPF Simple dialog box without MVVM

Question

I'd like to have a simple dialog box with text field. For now I have:

ViewModel:

   public class MyViewModel
   {
       public string AA { get; set; }
   }

View:

public partial class MyView : Window
{

    public MyView(MyViewModel context)
    {
        InitializeComponent();
        this.DataContext = context;
    }

    public string BB {get; set; }
 }

 <Window 
        ...>
      <Grid>

            <Label>name:</Label>
            <TextBox Width="110">
                <TextBox.Text>
                    <Binding Path="AA"/>
                </TextBox.Text>
            </TextBox>
            ...
       </Grid >
 </Window>

In order to open it and get the value I call:

   MyViewModel model = new MyViewModel();
   MyView dialog = new MyView(model);
   dialog.ShowDialog();

Now I'm able to take the provided TextBox value from the MyViewModel AA property.

Is it possible to store the provided value in the MyView BB property (and so remove the MyViewModel)? I tried to change the xaml configuration but no mater what I put there the BB property is always null.

The only reason I ask is that my dialog will do nothing more than collect this one single value and I'd like to keep it as thin as possible.

@phadaphunk, As MyView is a Window from WPF, it has no Dispose method. Calling ShowDialog should be enough for Close to get called and clean up. — Qaz
– Qaz, Commented Jan 22, 2015 at 17:07
You mean the older winforms way of returning a value from a dialog, like this? — Rachel
– Rachel, Commented Jan 22, 2015 at 19:41

user1228 · Accepted Answer · 2015-01-22 16:54:17Z

0

 <Window x:Name="root"
        ...>
      <Grid>

            <Label>name:</Label>
            <TextBox Width="110" Text="{Binding BB, ElementName=root} />
            ...
       </Grid >
 </Window>

should be all you need to do.

answered Jan 22, 2015 at 16:54

user1228

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Comments

Rob van Daal · Accepted Answer · 2015-01-22 17:19:58Z

0

You can also simply replace

    this.DataContext = context;

by

    this.DataContext = this;

and i would put it before the InitializeComponent call.

But if you want to store the value from textbox to BB, then you also need to set the mode:

    <TextBox Text="{Binding BB, Mode=TwoWay}"/>

And don't forget to implement INotifyPropertyChanged in your MyView class.

answered Jan 22, 2015 at 17:19

Rob van Daal

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Community · Accepted Answer · 2017-05-23 12:20:35Z

0

you could take the aprroach i use: Good or bad practice for Dialogs in wpf with MVVM?

here you call a dailogservice like

var result = this.uiDialogService.ShowDialog("Dialogwindow title goes here", dialogwindowVM);

... do anything with the dialog result...

edited May 23, 2017 at 12:20

CommunityBot

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answered Jan 23, 2015 at 9:05

blindmeis

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