WPF如何绑定GridView?

我正在执行此XAML:

 <StackPanel Margin="320,0,0,0" Grid.RowSpan="2">
        <ListView ItemsSource="{Binding employeeCollection}">
            <ListView.View>
                <GridView>

                    <GridViewColumn Header="Employee ID" DisplayMemberBinding="{Binding Path=EmployeeID}"/>
                    <GridViewColumn Header="First Name" DisplayMemberBinding="{Binding Path=FirstName}"/>
                    <GridViewColumn Header="Last Name" DisplayMemberBinding="{Binding Path=LastName}"/>
                    <GridViewColumn Header="start" DisplayMemberBinding="{Binding Path=startHR}"/>
                    <GridViewColumn Header="finish" DisplayMemberBinding="{Binding Path=finishHR}">

                </GridViewColumn>
            </GridView>
    </ListView.View>

        </ListView>
    </StackPanel>

后面的代码是:

class employeesGrid //: INotifyPropertyChanged
{
    ObservableCollection<employiesData> _employeeCollection = 
    new ObservableCollection<employiesData>();

    public employeesGrid()
{
    _employeeCollection.Add(new employiesData{

      EmployeeID = "World Of Warcraft", 
      FirstName = "Blizzard", 
      LastName = "Blizzard",
      startHR = "2222",
      finishHR = "dfs"
  });


}

    public ObservableCollection<employiesData> employeeCollection
{ get { return _employeeCollection; } }


}

public class employiesData
{
    public string EmployeeID { get; set; }
    public string FirstName { get; set; }
    public string LastName { get; set; }
    public string startHR { get; set; }
    public string finishHR { get; set; }
}

}

在我的主窗口里我在做什么:

/ /构造函数: 初始化组件(); employeesgrid em=新employeesgrid();

1.有人能告诉我我做错了什么吗? 2.InotifyPropertiesChanged为什么要使用它?我应该如何使用它?

感谢你关注我的工作,这对我来说意义重大:)

假设我在我的程序中需要两个这样的结构,那么最好的实现是什么?????