CODEWITHSUNDEEP
c#wpfclassxamldata-binding
James
James

Reputation: 356

Databinding from member variables in a class. WPF

Evening all,

I'm working on a WPF application which uses databinding to bind variables of a class to a UI. I've set up my class to incorporate INotifyPropertyChanged which is working fine in my other projects. It currently looks like this:

 namespace playerWPF
{
    class GameInfo : INotifyPropertyChanged
    {

        public GameInfo(string _teamName) //constructor
        {
            this.TeamName = _teamName;
            this.OppositionName = "Opposition";
            this.TeamScore = 0;
            this.OppositionScore = 0;
            this.Question = "What is your team name?";



        }

        public event PropertyChangedEventHandler PropertyChanged;

        private void OnPropertyChanged(string property)
        {
            PropertyChangedEventHandler handler = PropertyChanged;
            if (handler != null)
            {
                handler(this, new PropertyChangedEventArgs(property));
            }
        }

        private string question;

        public string Question
        {
            get
            {
                return question;
            }
            set
            {
                question = value;
                OnPropertyChanged("Question");
            }
        }

//and so on for all the other variables in a similiar fashion

My XAML looks like this:

    <Window x:Class="playerWPF.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:local="clr-namespace:playerWPF"
        xmlns:system="clr-namespace:System;assembly=mscorlib"
        Title="MainWindow" Height="350" Width="525"
        Name="MainWindowName">

    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="112*"/>
            <RowDefinition Height="207*"/>
        </Grid.RowDefinitions>
        <TextBox x:Name="answerBox" HorizontalAlignment="Left" Height="32" Margin="58,60,0,0" TextWrapping="Wrap" Text="Answer here..." VerticalAlignment="Top" Width="371" Grid.Row="1"/>
        <Button x:Name="submitButton" Content="Submit" Click="submitButton_Click" HorizontalAlignment="Left" Height="35" Margin="199,97,0,0" VerticalAlignment="Top" Width="92" Grid.Row="1"/>
        <Label x:Name="teamNameLabel" Content="{Binding TeamName}" HorizontalAlignment="Left" Margin="10,10,0,0" VerticalAlignment="Top" Height="25" Width="74"/>
        <Label x:Name="oppositionName" Content="{Binding OppositionName}" HorizontalAlignment="Left" Margin="328,9,0,0" VerticalAlignment="Top" Width="101"/>
        <Label x:Name="responseLabel" Content="{Binding Question}" HorizontalAlignment="Left" Height="49" Margin="58,6,0,0" VerticalAlignment="Top" Width="371" Grid.Row="1"/>
        <Label x:Name="teamScoreLabel" Content="{Binding TeamScore}" HorizontalAlignment="Left" Margin="19,35,0,0" VerticalAlignment="Top" Width="65"/>
        <Label x:Name="oppositionScoreLabel" Content="{Binding OppositionScore}" HorizontalAlignment="Left" Margin="340,40,0,0" VerticalAlignment="Top" Width="65"/>

    </Grid>
</Window>

I initialise a type of this class as a static field in my MainWindow like thus: private static GameInfo gameInfo;

And in the Main window constructor I assign it a new instance: gameInfo = new GameInfo("Team");

It is my understanding that this should change some of the labels on the UI to their default constructed values but this is not the case. Can anyone shed any light?

Upvotes: 0

Views: 1210

Answers (1)

Crowcoder
Crowcoder

Reputation: 11514

You want to utilize gameInfo like you would a View Model if you were following the MVVM pattern. So, change

DataContext = this; //you don't want the data context to be the window itself

to

DataContext = gameInfo;

Then your bindings are simply 

{Binding <property name>}

Upvotes: 2

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