How to select first item in DevExpress ComboBoxEdit?

Question

I have WPF application and use UserControl as a view. Inside that UserControl there is DevExpress ComboBoxEdit.

<UserControl ... 
             xmlns:dxe="http://schemas.devexpress.com/winfx/2008/xaml/editors">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto"/>
        </Grid.RowDefinitions>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="*"/>
        </Grid.ColumnDefinitions>
        <dxe:ComboBoxEdit Name="ComboBoxInspectionList" Grid.Row="0" Grid.Column="0" ItemsSource="{Binding InspectionList}" SelectedItem="{Binding SelectedInspection}" IsTextEditable="False"/>
    </Grid>
</UserControl>

ComboBox is data bound. I've tried this:

public partial class InspectionList : UserControl
{
    public InspectionList()
    {
        InitializeComponent();

        if (ComboBoxInspectionList.Items.Count > 0)
        {
            ComboBoxInspectionList.SelectedIndex = 0;
        }
    }
}

But, data binding happened after the code in UserControl's constructor is executed.

Answer 1

Can't you just set the SelectedIndex property to 0 in the XAML markup?:

<dxe:ComboBoxEdit Name="ComboBoxInspectionList" SelectedIndex="0" Grid.Row="0" Grid.Column="0" ItemsSource="{Binding InspectionList}" SelectedItem="{Binding SelectedInspection}" IsTextEditable="False"/>

The MVVM way of doing this would be to set the SelectedInspection property to an object that is actually present in the InspectionList in the view model as suggested by @3615:

SelectedInspection = InspectionList.FirstOrDefault();

You can obviously not select an item that is not present in the Items collection of the ComboBox.