CODEWITHSUNDEEP
wpfc#-4.0binding
mrJack
mrJack

Reputation: 1011

event binding in MVVM

my code in ViewModel :

public void Insert_Click(object sender, RoutedEventArgs e)
{
    System.Windows.MessageBox.Show("Insert_Click");
}

code in View :

<Button Click="{Binding Insert_Click}"  Background="Black" Height="56" Name="btnAdd" Width="57">
</Button>

error :

Error 1 Click="{Binding Insert_Click}" is not valid. '{Binding Insert_Click}' is not a valid event handler method name. Only instance methods on the generated or code-behind class are valid

Please show me the correct code

Upvotes: 2

Views: 1068

Answers (1)

aqwert
aqwert

Reputation: 10789

The event hook ups will only work for code behind to the control/window if you remove the Binding syntax from the event handler. For MVVM it is a bit different. You can get that to work if you move the handler to the code behind but I suspect you want to use MVVM.

Here what you really need is to use the Command pattern

<Button Command="{Binding Insert}" Background="Black" Height="56" Name="btnAdd" Width="57"/>

and view model

public ViewModel()
{
     Insert = new RelayCommand(Insert_Click);
}

public ICommand Insert { get; private set; }


private void Insert_Click()
{
    System.Windows.MessageBox.Show("Insert_Click");
}

This is using a framework such as MVVM light

Upvotes: 5

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