c# - Check if value appears in combobox -

i want check if item array appears in combobox before adding item combobox, avoid duplicates.

i not allowed use linq

code:

private void tooncategorien()     {         cbocategorie.items.clear();         foreach (string scategorie in marrcategorie){             if (!cbocategorie.items.contains(scategorie))             {                 comboboxitem cboitem = new comboboxitem();                 cboitem.content = scategorie;                 cbocategorie.items.add(cboitem);             }         }     } 

sorry using dutch in c# code.

so marrcategorie array contains categories read streamreader. problem adds anyway. assume problem in if-loop.

i tried if(cbocategorie.text.contains(scategorie)) no result.

i not allowed post pictures directly yet, sorry using hyperlink):

result

thanks in advance!

solution, bolu:

    private void tooncategorien()     {         cbocategorie.items.clear();         foreach (string scategorie in marrcategorie){             if (!cbocategorie.items.contains(scategorie))             {                 cbocategorie.items.add(scategorie);             }         }     } 

you comparing string comboboxitem here, think can use string: e.g:

private void tooncategorien()     {         cbocategorie.items.clear();         foreach (string scategorie in marrcategorie){             if (!cbocategorie.items.contains(scategorie))             {                                 cbocategorie.items.add(scategorie);             }         }     }