CODEWITHSUNDEEP
c#wpfmvvmcombobox
Dan Sewell
Dan Sewell

Reputation: 1290

Combo box item not initally selected

I need my ComboBox's first item to be selected when loaded.

XAML: 

 <ComboBox x:Name="CreateLstBoxFormat" HorizontalAlignment="Left" Margin="27,334,0,0" IsSynchronizedWithCurrentItem="True" VerticalAlignment="Top" Width="90"  SelectedValuePath="Content" SelectedIndex="0" SelectedItem="{Binding CreateFormatSelectedItem, Mode=TwoWay}">
    <ComboBox.ItemsSource>
        <x:Array xmlns:sys="clr-namespace:System;assembly=mscorlib" Type="{x:Type sys:String}">
            <sys:String>MXF</sys:String>
            <sys:String>Quicktime MOV</sys:String>
            <sys:String>DPX</sys:String>
            <sys:String>TIF</sys:String>
            <sys:String>TGA</sys:String>
            <sys:String>CIN</sys:String>
            <sys:String>EXR</sys:String>
        </x:Array>
    </ComboBox.ItemsSource>
    <i:Interaction.Triggers>
        <i:EventTrigger EventName="SelectionChanged">
            <i:InvokeCommandAction Command="{Binding Create_FormatSelectCommand}" 
                                    CommandParameter="{Binding YourCommandParameter}" />
        </i:EventTrigger>
    </i:Interaction.Triggers>
</ComboBox>

I expected MXFto be initially selected in the combo box on opening of the window.

I'm using the SelectedItem property to fire an event when the selected item has changed.

Upvotes: 0

Views: 97

Answers (2)

Noam M
Noam M

Reputation: 3164

Try using SelectedItem property:

<ComboBox Name="myComboBox" 
          ItemsSource="{Binding}" 
          DisplayMemberPath="Description" 
          SelectedItem="{Binding Path=id}"
          IsSynchronizedWithCurrentItem="True"
          SelectedIndex="0" />

Upvotes: 1

DeshDeep Singh
DeshDeep Singh

Reputation: 1853

I think using 

SelectedIndex="0(or your desired index)"

will do that for you, even if you are working with MVVM approach. if you don't select anything then it will always show it as blank initially.

Upvotes: 0

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