I am trying to bind two values to a ComboBox display value, but I do not know how to do.
This way does not work:
cboRegion.DisplayMemberPath = "idregion" + "description";
Does anyone know how to do that in C#?
Unfortunately, this is not possible with DisplayMemberPath
. You have the following alternatives:
Specify a DataTemplate
<ComboBox>
<ComboBox.ItemTemplate>
<DataTemplate>
<TextBlock>
<TextBlock.Text>
<MultiBinding StringFormat="{}{0}: {1}">
<Binding Path="idregion"/>
<Binding Path="description"/>
</MultiBinding>
</TextBlock.Text>
</TextBlock>
</DataTemplate>
</ComboBox.ItemTemplate>
</ComboBox>
(If you are wondering about the empty braces in the StringFormat attribute, see: What do the {} brackets mean in the StringFormat section of a Binding syntax?)
Add a property or field to your data source. How to do that depends on your data source:
If your combo box is bound to a DataTable, add a DataColumn and fill its values in a loop. Alternatively, change your SQL and add the concatenated value to your SELECT
clause.
If your combo box is bound to a POCO or entity framework object, add a property that returns the concatenation.