数据绑定可观察的字符串集合

Question

I have the following class:

public class MyClass
{
    public ObservableCollection<string> MyList { get; set; }
    public string MyListTitle { get; set; }
...

I'm populating it as follows:

MyClass myClass = new MyClass("Data"); // Populates title

myClass.MyList.Add("Test data 1");
myClass.MyList.Add("Test data 2");

myListView.DataContext = MyClass.MyList;

Finally, here's the XAML:

<ListView Visibility="Visible" x:Name="myListView" Height="Auto">
    <ScrollViewer x:Name="contentScrollView">
        <TextBlock x:Name="DataItem" Text="{Binding}" />                                
    </ScrollViewer>
</ListView>

The result (and problem) is that I get the class name displayed once in the listview, rather than the two entries above.

Answer 1

You first need to set the ItemsSource property of the ListView to your ObservableCollection

myListView.ItemsSource = myClass.MyList;

Also, you need to use a DataTemplate to display the actual items:

<ListView.ItemTemplate>
 <DataTemplate>
   <TextBlock x:Name="DataItem" Text="{Binding}" /> 
 </DataTemplate>
</ListView.ItemTemplate>

Answer 2

You're binding the TextBlock that's why you receive the .ToString() of the list. What you need to bind is the ItemsSource of your list, that way the ListView will bind its items with the ones inside your list.

Answer 3

Possibly this one

myListView.DataContext = MyClass.MyList;

Shall become

myListView.DataContext = myClass.MyList; //note the case of myClass

Answer 4

It should be

<ListView x:Name="myListView" Height="Auto" ItemsSource="{Binding MyList}">            
        <ListView.ItemTemplate>
            <DataTemplate>
                <TextBlock x:Name="DataItem" Text="{Binding}" />
            </DataTemplate>
        </ListView.ItemTemplate>            
    </ListView>

and

MyClass myClass = new MyClass();

        myClass.MyList = new ObservableCollection<string>();
        myClass.MyList.Add("Test data 1");
        myClass.MyList.Add("Test data 2");

        this.DataContext = myClass;

and

public class MyClass
{
    public ObservableCollection<string> MyList { get; set; }
    public string MyListTitle { get; set; }

    public MyClass()
    {

    }
}

Result