vb.net - Need to bind/populate combobox in WPF forms, ideally with value and display -


my application other reasons isn't set mvvm architecture , i'm not able @ time. thing need modify combobox populated database (it stored in oracledatareader). programmatically add items combobox looping through oracledatareader, or bind in way.

public sub loadlocationcombo()     dim rs oracledatareader     dim dt new datatable()     dim dr datarow     dim lstitems new arraylist      rs = objclsdb.locationcombo      dt.load(rs)      dt.columns("description").allowdbnull = true     dt.columns("value_id").allowdbnull = true     dt.columns("description").defaultvalue = ""     dt.columns("value_id").defaultvalue = 0      dr = dt.newrow      dr("description") = ""     dr("value_id") = 0      dt.rows.insertat(dr, 0)      cbolocation.itemssource = dt.defaultview     cbolocation.displaymemberpath = "description"     cbolocation.selectedvaluepath = "value_id"  end sub

that current method, i'm trying add blank row @ top well. makes combo have looks multiple rows nothing in selected value , nothing displays.

edit: if remove cbolocation.displaymemberpath , .selectedvaluepath combobox filled bunch of system.data.common.datarecordinternal

first, defaultview of datatable return object of type dataview, , dataview not have properties called "description" or "value_id". that's why nothing selected, , nothing displayed.

you might build list , fill datatable values, example:

dim listtofillcombo new list(of keyvaluepair(of integer, string))  each dr datarow in dt.rows     listtofillcombo .add(new keyvaluepair(of integer, string)(cint(dr("value_id")), dr("description").tostring)) next

then combobox binding

cbolocation.itemssource = listtofillcombo  cbolocation.displaymemberpath = "value" cbolocation.selectedvaluepath = "key"

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