Convert object string to object(class) in C# using Winforms -

here going tell working on , after there comes question. want tell guys working on.. guys can understand problem better.

thanks in advance,

i working on project. app grocery calculator. got class called artikel. class base class of other derived classes (vegetables, drinks, warmfood.. etc).

i got combobox filled data database. want add price of each product "total cost cart". base class looks this:

class artikel {     // properties     private string naam;     private double prijs;     private string winkel;      // properties     public string naam     {         { return naam; }         set { naam = value; }     }      public double prijs     {         { return prijs; }         set { prijs = value; }     }      public string winkel     {         { return winkel; }         set { winkel = value; }     }      // constructor     public artikel(string naam, double prijs, string winkel)     {         this.naam = naam;         this.prijs = prijs;         this.winkel = winkel;     }      // methods     public override string tostring()     {         string info = "€ " + prijs;         return info;     } 

from main form use code add combobox:

    foreach(var g in database.getgroenteinfo())     {         cbgroentenlidl.items.add(g.naam);     } 

when combobox full "vegetable" data can select item. here can add selected item "lblidlkosten" code:

lblidlkosten.items.add(cbgroentenlidl.selecteditem); 

now data right want it.. here problem. want add price each product add listbox... label. basicly more product add "lblidlkosten" more costs grow in label.text. hope know mean.

i tried following 1 working:

    artikellist = database.getgroenteinfo();      //foreach (artikel in artikellist)     //{     //    label2.text = convert.tostring(a.prijs);     //    label2.text = cbgroentenlidl.selecteditem;     //}      //foreach (artikel in lblidlkosten.items)     //{     //    label2.text = a.prijs.tostring();     //}      //artikel artikel = (artikel)cbgroentenlidl.selecteditem;     //label2.text = artikel.prijs.tostring();      foreach (artikel in lblidlkosten.items)     {         label2.text = convert.tostring(a.prijs);     } 

all these solutions won't work. because getting error: "cannot convert object string object artikel".

does has clue? simple.. cannot find , stuck last 3 days.

with kind regards

in here:

foreach(var g in database.getgroenteinfo()) {     cbgroentenlidl.items.add(g.naam); } 

you're adding name combo box, rather item itself. perhaps can try binding item collection combo box datasource, so:

cbgroentenlidl.datasource = database.getgroenteinfo().tolist(); cbgroentenlidl.displaymember = "naam"; 

then when add listbox, have object, rather name.