Question

Ok so, I have a listview with several rows which is defined by setting the itemsource in the code. Within each row that’s generated I have a combobox. In the code I have another array of objects which is the collection that this combobox should display.

I basically want it so that for each row you can select an option from the list. The list of possibilities will always be the same, hence the array.

A little bit of code to help. This is what I have for XAML:

    <ListView Name="lvVanList">
        <ListView.View>
            <GridView>
                <DisplayMemberBinding="{Binding Path=Number}">Van</GridViewColumn>
                <GridViewColumn Header="Rooms">
                    <GridViewColumn.CellTemplate>
                        <DataTemplate>
                            <StackPanel Orientation="Horizontal">
                                <ComboBox Name="cbSchemeList" ItemsSource="{Binding Path=_RoomList}" SelectedValue="{Binding Path=Room}" DisplayMemberPath="Name" />
                            </StackPanel>
                        </DataTemplate>
                    </GridViewColumn.CellTemplate>
                </GridViewColumn>
            </GridView>
        </ListView.View>
    </ListView>

The code behind:

    private RoomList _RoomList;

    public populateList()
    {
        this.lvVanList.ItemsSource = this.getVans;
        this._RoomList = this.getRooms;
    }

    private class Room
    {
        string Name { get; set; }
        int Windows { get; set; } 
    }

Unfortunately this shows a blank list when the combobox is open.

I do have a way around this by storing the possibilities list in the object which is binded to each row but I’m sure I should be able to just use a single collection.

It’s tough to describe so if there’s any information I’ve missed or it’s not understandable please let me know.

Thanks in advance

Answer 1

The problem is that the binding path (_RoomList) is relative to the DataContext of each entry of the ListView. And that DataContext is the displayed item and not your view.

You can solve this in multiple ways:

1. Put the list in the displayed items – that’s what you already discovered and want to avoid
2. Give your view a name and use that name the binding as ElementName
3. In the binding, find the ancestor of the item that is the view