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Automatic selection of the first Comboxbox item

I have a ComboBox that binds to a ViewModel property.

<ComboBox  ItemsSource="{Binding UserCollection}"   SelectedValuePath="Id" DisplayMemberPath="UserName"   SelectedValue="{Binding SelectedUser}"       />

I want to auto select the first item when it has items.

I am using IsSynchronizedWithCurrentItem="True"

and SelectedIndex="0"

but not selecting items.

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2 answers


Could you please add your binding mode as two way



<ComboBox  ItemsSource="{Binding UserCollection}"    DisplayMemberPath="UserName"   SelectedItem="{Binding Path=Id}" IsSynchronizedWithCurrentItem="True" SelectedIndex="0"/>
0


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Bind SelectedItem

instead SelectedValue

:

<ComboBox ItemsSource="{Binding UserCollection}"  
          SelectedItem="{Binding SelectedUser}"     
          SelectedValuePath="Id"
          DisplayMemberPath="UserName"  
 />


Then set SelectedUser

to the first element of your list (if not already set):

SelectedUser = UserCollection[0];
0


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