Example of EventTrigger in MVVM Application

<TextBox Grid.Row="1" Grid.Column="1" Text="{Binding Path=LastName, Mode=TwoWay}" />

<TextBox Grid.Row="2" Grid.Column="1" Text="{Binding Path=Title, Mode=TwoWay}" />

<TextBox Grid.Row="3" Grid.Column="1" Text="{Binding Path=Department, Mode=TwoWay}" />

</Grid>

</Grid>

</Window>

CodeBehind CODE

The folllwoing code is in viewModel of mvvm

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using Example04.Model;

using Example04.Common;

using System.ComponentModel;

namespace Example04.ViewModel

{

public class MainWindowViewModel : INotifyPropertyChanged

{

public List<Employee> empList { get; set; }

private Employee selectedEmployee;

public Employee SelectedEmployee

{

get { return selectedEmployee; }

set

{

selectedEmployee = value;

NotifyPropertyChanged("SelectedEmployee");

}

}

public DelegateCommand<object> MyCommand { get; private set; }

public MainWindowViewModel()

{

List<Employee> elist = new List<Employee>();

elist.Add(new Employee() { EmployeeNumber = 1, FirstName = "John", LastName = "Dow", Title = "Accountant", Department = "Payroll" });

elist.Add(new Employee() { EmployeeNumber = 2, FirstName = "Jane", LastName = "Austin", Title = "Account Executive", Department = "Employee Management" });

elist.Add(new Employee() { EmployeeNumber = 3, FirstName = "Ralph", LastName = "Emmerson", Title = "QA Manager", Department = "Product Development" });

elist.Add(new Employee() { EmployeeNumber = 4, FirstName = "Patrick", LastName = "Fitzgerald", Title = "QA Manager", Department = "Product Development" });

elist.Add(new Employee() { EmployeeNumber = 5, FirstName = "Charles", LastName = "Dickens", Title = "QA Manager", Department = "Product Development" });

empList = elist;

MyCommand = new DelegateCommand<object>(Excute);

}

public void Excute(object employee)

{

SelectedEmployee = (Employee)employee;

}

protected void NotifyPropertyChanged(string propertyName)

{

if (PropertyChanged != null)

{

PropertyChangedEventArgs args = new PropertyChangedEventArgs(propertyName);

this.PropertyChanged(this, args);

}

}

public event PropertyChangedEventHandler PropertyChanged;

}

}

The following code is in Model

CodeBehind

namespace Example04.Model

{

public class Employee

{

public int EmployeeNumber { get; set; }

public string FirstName { get; set; }

public string LastName { get; set; }

public string Department { get; set; }

public string Title { get; set; }

public override string ToString()

{

return String.Format("{0} {1} ({2})", FirstName, LastName, EmployeeNumber);

}

}

}