WPF - DataBinding (Command is not being executed) - wpf

Question

I am writing a WPF application where I wish to implement the MVM pattern.
My code is currently set up like this:
This is my view model class where I am exposing the command I wish to be executed as a property
```
public HomeScreenViewModel(NavigationService mw)
{
this.mw = mw;
}
private RelayCommand _addStudent;
public ICommand AddStudent
{
get
{
if (_addStudent == null)
{
_addStudent = new RelayCommand(param => this.OpenNewStudents(), param => true);
}
return _addStudent;
}
}
This is my xaml containing the layout of the corresponding view
<Page x:Class="test.HomeScreen"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:local="clr-namespace:test"
mc:Ignorable="d"
d:DesignHeight="450" d:DesignWidth="1300"
Title="HomeScreen">
<WrapPanel VerticalAlignment="Center" HorizontalAlignment="Center">
<WrapPanel HorizontalAlignment="Center" Height="300" Margin="0,0,0,0" VerticalAlignment="Center" Width="1300">
<Button Content="AddStudent" Command="{Binding AddCommand}" Style="{StaticResource ButtonStyle}" />
<Button Content="AddStudent" Style="{StaticResource ButtonStyle}" />
<Button Content="AddStudent" Style="{StaticResource ButtonStyle}" />
<Button Content="AddStudent" Style="{StaticResource ButtonStyle}" />
<Button Content="AddStudent" Style="{StaticResource ButtonStyle}" />
<Button Content="AddStudent" Style="{StaticResource ButtonStyle}" />
<Button Content="AddStudent" Style="{StaticResource ButtonStyle}" />
<Button Content="AddStudent" Style="{StaticResource ButtonStyle}" />
<TextBox Text="{Binding Path=HI}" Width="200" Height="200"/>
</WrapPanel>
<Canvas Margin="350, 100,0, 0" Height="300" Width="1350" VerticalAlignment="Center" HorizontalAlignment="Center">
<Image Source="Logo.PNG"/>
</Canvas>
</WrapPanel>
I have set the command of the top button using the binding syntax in the WrapPanel.
This HomeScreen page is linked from a naviagation window and is the source of the navigation window (xaml file):
<NavigationWindow x:Class="test.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:test"
mc:Ignorable="d"
Title="School Management App" Height="350" Width="1250"
Source="HomeScreen.xaml">
</NavigationWindow>
I have my HomeScreen view constructor set like this:
public partial class HomeScreen : Page
{
public HomeScreen()
{
InitializeComponent();
this.DataContext = new HomeScreenViewModel(this.NavigationService);
}
}
My infrastructure is set up as I have described above and my implementation of relay command is taken from this site https://msdn.microsoft.com/en-us/magazine/dd419663.aspx.
When I run my application and I press the corresponding button, nothing happens. I was wondering if someone could help me figure out what is wrong and why the command binding isn't working. It would be much appreciated, thanks :)
as a side note, could someone give me some tips on what the best way to debug wpf applications and figure out what bindings exist at run time.
Thanks :)

Answer 1

your command name is AddStudent, but you use AddCommand in xaml. Just correct the name:
Command="{Binding AddStudent}"