CODEWITHSUNDEEP
c#wpfxamlinotifypropertychanged
3ka5_cat
3ka5_cat

Reputation: 131

OnPropertyChanged and XAML

I'm trying to specify data variable for my TextBlock at xaml:

<TextBlock Name="Test11" Text="{Binding Path=Test}"></TextBlock>

I'm using OnPropertyChanged for it:

public partial class MainWindow : Window, INotifyPropertyChanged

private string _test;

public event PropertyChangedEventHandler PropertyChanged;

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

public string Test
        {
            get
            {
                return _test;
            }
            set
            {
                _test = value;
                OnPropertyChanged("Test");
            }
        }

And trying to set value at MainWindow constructor:

public MainWindow()
        {
            InitializeComponent();
            Test = "teeest";
        }

But Textblock.Text wasn't updated... What I'm doing wrong?

Upvotes: 1

Views: 6329

Answers (2)

Klaus78
Klaus78

Reputation: 11896

In the Window constructor after

InitializeComponents()

put

this.DataContext = this;

Upvotes: 0

SynerCoder
SynerCoder

Reputation: 12766

You need to set the datacontext so the UI knows where to get the data for the binding.

public MainWindow()
{
    InitializeComponent();
    this.DataContext = this;
    Test = "teeest";
}

Upvotes: 2

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