removing item from comboBox if it matches a cetain cell in dataGridView in VB.net -

i have list of names (employees) in combobox use add datagridview. i'm trying make once employee in database , displayed in datagrid, name removed combobox not appear available add datagrid. code i've written task looks should work, doesn't.

public class main

public techphones new phonesdataset.techcompanyphonesdatatable public techphonestableadapter new phonesdatasettableadapters.techcompanyphonestableadapter public employees new phonesdataset.employeesdatatable public emptableadapter new phonesdatasettableadapters.employeestableadapter  private sub form1_load(byval sender system.object, byval e system.eventargs) handles mybase.load, mybase.activated      loadform()  end sub  private sub cboemployee_selectedindexchanged(byval sender system.object, byval e system.eventargs) handles cboemployee.selectedindexchanged     lbloffice.text = "office: " + cboemployee.selecteditem("office")     lblphone.text = cboemployee.selecteditem("phone")     lblempid.text = cboemployee.selecteditem("empid") end sub  private sub btnadd_click(byval sender system.object, byval e system.eventargs) handles btnadd.click, datagridview1.celldoubleclick      dim addemp new addemployee(cboemployee.selecteditem("employee"), cboemployee.selecteditem("office"), cboemployee.selecteditem("phone"), _                                   cboemployee.selecteditem("officeid"), cboemployee.selecteditem("empid"), cboemployee.selecteditem("contract"), cboemployee.selecteditem("returned"), _                                   cboemployee.selecteditem("loaner"))     addemp.showdialog()  end sub  private sub datagridview1_cellcontentclick(byval sender system.object, byval e system.windows.forms.datagridviewcelleventargs) handles datagridview1.cellcontentclick      dim name string = datagridview1.rows(datagridview1.currentcell.rowindex).cells(2).value     dim employee string      index integer = 0 cboemployee.items.count - 1 step 1         if cboemployee.items(index)("employee") = name             employee = cboemployee.items(index)("employee")             cboemployee.selectedindex = index         end if     next  end sub  private sub btndelete_click(byval sender system.object, byval e system.eventargs) handles btndelete.click     techphonestableadapter.deletequery((datagridview1.rows(datagridview1.currentcell.rowindex).cells(1).value))     loadform() end sub  private sub loadform()     techphones = techphonestableadapter.getdata()     datagridview1.datasource = techphones      employees = emptableadapter.getdata()      cboemployee.datasource = employees     cboemployee.displaymember = ("employee")     cboemployee.valuemember = ("empid")      lbloffice.text = "office: " + cboemployee.selecteditem("office")     lblphone.text = cboemployee.selecteditem("phone")     lblempid.text = cboemployee.selecteditem("empid")     cboemployee.focus()     cboemployee.selectall()     lblrowcount.text = "there " + datagridview1.rowcount.tostring + " phones accounted for."      ' code below supposed check every row in data grid against employee list in      ' cboemployees , remove list when match     datagridview1         indexdgv integer = 0 .rows.count - 1 step 1             cboemployee.items.remove(.rows(indexdgv).cells(2).value)         next     end     cboemployee.refresh() end sub 

end class

i've tried minor variation:

 datagridview1             indexdgv integer = 0 .rows.count - 1 step 1                 indexcbo integer = cboemployee.items.count - 1 0 step -1                     if .rows(indexdgv).cells(2).value = cboemployee.items(indexcbo)("employee")                         cboemployee.items.removeat(indexcbo)                     end if                 next             next         end 

you don't need iterate through combobox items. .remove (string) work, , if item want remove not there, ignores command.

with datagridview1     indexdgv integer = 0 .rows.count - 1 step 1         cboemployee.items.remove(.rows(indexdgv).cells(2).value)     next end