Delete data using 2 DialogForm

Question

hi i have question for remove data from 2 forms dialog
in first dialogform it's contain list of data, and in second dialogform it's contain detail of data and delete button... i already successfully delete data in database but i confused how to remove data from list...

if just select data and delete i know it's can be done with this code

quizzes.RemoveAt(listBoxQuizzes.SelectedIndex);

but problem here in dialogform1 not available button delete, just view details data. so if user want to delete data, he must open dialogform2 (detail data) i already done delete data in database with this code

Global.deleteData("DELETE FROM Quiz_Occurrences WHERE ID = " + id);

and close detaildataform (dialogform2) by

this.Close();

and move to dialogform1 (listdatabox) the problem in here, data which just i delete still in there because it's still not remove yet (already delete from database but not remove from list). and need to restart program to see effect of delete data

---

Update Progress

i changed data to global var, so it's technically i can remove data in dialogform2
this is code (modifier listbox in dialogform1)

 int no = 1;
 foreach (CQuizOccurrence myQuizOccurrence in Global.quizOccurrences) {

 }

if i want to delete it from dialogform1, i can use

Global.quizOccurrences.removeAT(listBoxQuizzes.SelectedIndex);

but if i want to delete it from dialogform2

Global.quizOccurrences.removeAT(.........); //still not have idea how can i reference index

---

Update solution from @nitin

so first i write in formdialog2

public Frmdialog1 frm_dialog { get; set; }

then i write this in formdialog1

frmdialog2.frm_dialog=this;

then back again to formdialog1 to write

frm_dialog.quizzes.RemoveAt(frm_dialog.listBoxQuizzes.SelectedIndex);

is that right because i get many error

Answer 1

form1 could subscibe to the form2's close event.

inside form1

form2 f2dialog = new form2(/*I guess you are passing data here*/);
f2.dialog.Closing += eventhandler;

somewhere else

void eventhandler(object sender, eventargs e)
{
 //refresh globaldata since by now you have ran delete query
 //rebind or call listbox.items.refresh() or both  <-------------this how do you get data from rver? the server is updated but does global know that?


}

then you need to call code to get data from database again. and rebind to data

listbox.datacontext = Global.GetData();//or however this is done

you have to manually reset this eveerytime you change your database

databinding is not as smart as you think it is.

Answer 2

If you are opening second dialog from first one u can Have property in Frmdialog2 like

 public Frmdialog1 frm_dialog { get; set; }

After creating object of Frmdialog2 in Frmdialog1 you can set this property as

frmdialog2.frm_dialog=this;

Now u can remove item from this listbox in Frmdialog2 iteself after deleting record from database as

  frm_dialog.quizzes.RemoveAt(frm_dialog.listBoxQuizzes.SelectedIndex);

NOTE: Modifier for your listbox should be public

Answer 3

i'm finally be able to do as i want after ask many different question about this topic
first i try to change var to global, so i can remove data in listbox dialogform1 from dialogform2 (i think it's the easiest way)

//in dialog form1 
foreach (CQuizOccurrence myQuizOccurrence in Global.quizOccurrences) {
   //load data from Global.quizOccurences
}
//call function close to close dialogform1

then in dialogform2, match Global.quizOccurrences data with date&time detail data (using list & foreach)

        List<CQuizOccurrence> matchData = new List<CQuizOccurrence>();
        foreach (CQuizOccurrence myQuizOccurrence in Global.quizOccurrences) 
        {
            DateTime dtDatabase = (DateTime)myQuizOccurrence.occurred;
            string dt = dtDatabase.ToString();
            if (dt == dateOccur) {
                matchData.Add(myQuizOccurrence);
            }
        }

        foreach (CQuizOccurrence myQuizOccurrence in matchData)
        {
            Global.quizOccurrences.Remove(myQuizOccurrence);
        }

        //call function show dialog for formdialog1