xaml windows phone 8.1 combobox Preselection display

Question

I have a comboBox that contains cars objects like the following:

<ComboBox x:Name="carsCombo" Grid.Column="1" >
                            <ComboBoxItem>Benz</ComboBoxItem>
                            <ComboBoxItem>BMW</ComboBoxItem>
                            <ComboBoxItem>VW</ComboBoxItem>

                        </ComboBox>

when the page is loaded, I don't set any selection in the code so no car is selected.. However the initial display of the comboBox will put a lable saying: "choose an item"

I want to change that string to : " choose a car" or whatever instruction i want to give the user.

I tried many properties of the comboBox but I failed.

I don't like the solution of adding and empty item and then selecting it. Because I think I can change this sentence in XAML

Answer 1

您可以直接在XAML中使用属性PlaceholderText。

Answer 2

您可以将其中一项的属性“ IsSelected”设置为true。