Winform combobox binding and setting default value with selected index -


i have case databatable datasource combobox , datatatable records change user selects field. want set default value in combobox when database has 1 record. works when write 

cmblist.items.count > 0  cmblist.selectedindex = 0

but loses focus goes blank. seems setting selectedindex 0 not update bindingsource values.

what's solution please


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