c# - How do i edit existing info with winforms -

i developing calendar/appointment application , when double click on appointment while application running want open form information typed before , edit all.(with streamwriter , streamreader)!

private void edittoolstripmenuitem_click(object sender, eventargs e) {      // raised selecting edit on content menu       // todo - need complete method.      // _selectedappointment set instance of appointment edited  } 

i have main form month calendar

private void monthcalendar_datechanged(object sender, daterangeeventargs e)         {             labeldisplayeddate.text=monthcalendar.selectionrange.start.tolongdatestring();             getappointmentsonselecteddate(monthcalendar.selectionrange.start);             // force repaint of daily view panel             paneldailyview.invalidate();         } 

a panel

private void paneldailyview_paint(object sender, painteventargs e)         {             int paintwidth = paneldailyview.clientrectangle.size.width - vscrollbar.width;             int paintheight = paneldailyview.clientrectangle.size.height;             int displayedrowcount = paintheight / panelrowheight;             int paneltoprow;             int nextrow;             int apptstartrow;             int apptlength;             string disptime;               font font = new font("arial", 10);             brush drawbrush = new solidbrush(color.darkblue);             brush appointmentbrush = new solidbrush(color.lightblue);              graphics g = e.graphics;             // fill background of panel             g.fillrectangle(new solidbrush(color.linen), 0, 0, paintwidth, paintheight);             paneltoprow = vscrollbar.value;             if (_selectedrow >= paneltoprow &&                 _selectedrow <= paneltoprow + displayedrowcount)             {                 // if selected time displayed, mark                 g.fillrectangle(new solidbrush(color.darkkhaki),                                  0,                                  (_selectedrow - paneltoprow) * panelrowheight,                                 paintwidth,                                 panelrowheight);             }             // display times @ start of rows ,             // lines separating rows             nextrow = paneltoprow;             (int = 0; <= displayedrowcount; i++)             {                 disptime = (nextrow / 2).tostring("0#") + (nextrow % 2 == 0 ? ":00" : ":30");                 nextrow++;                 g.drawstring(disptime, font, drawbrush, 2, (i * panelrowheight + 4));                 g.drawline(pens.darkblue, 0, * panelrowheight, paintwidth, * panelrowheight);             }             // fill in appointments             foreach (iappointment appointment in _todaysappointments)             {                 apptstartrow = utility.converttimetorow(appointment.start);                 apptlength = utility.convertlengthtorows(appointment.length);                 // see if appointment inside part of day displayed on panel                 if (((apptstartrow >= paneltoprow) &&                       (apptstartrow <= paneltoprow + displayedrowcount)) ||                     (apptstartrow + apptlength > paneltoprow))                 {                     // calculate area of panel occupied                     // appointment                     if (apptstartrow < paneltoprow)                     {                         apptlength = apptlength - (paneltoprow - apptstartrow);                         apptstartrow = paneltoprow;                     }                     int apptdispstart = (apptstartrow - paneltoprow) * panelrowheight;                     int apptdisplength = apptlength * panelrowheight;                     if (apptdispstart + apptdisplength > paintheight)                       {                         apptdisplength = paintheight - apptdispstart;                     }                     rectangle apptrectangle = new rectangle(apptoffset,                                                             apptdispstart,                                                             paintwidth - (apptoffset * 2),                                                             apptdisplength);                     // draw block of light blue                     g.fillrectangle(appointmentbrush,                                     apptrectangle);                     // draw black line around                     g.drawrectangle(pens.black, apptrectangle);                     if (utility.converttimetorow(appointment.start) >= paneltoprow)                     {                         // if top line of appointment displayed,                         // write out subject , location.  temporarily                         // reduce clip area graphics object ensure                         // text not extend beyond rectangle                         region oldclip = g.clip;                         g.clip = new region(apptrectangle);                         g.drawstring(appointment.displayabledescription,                                      font,                                      drawbrush,                                      apptoffset + 6,                                      apptdispstart + 4);                         g.clip = oldclip;                     }                 }             }         } 

and 2 buttons

private void buttonnewappt_click(object sender, eventargs e)         {             newappointment();             newappointment form2 = new newappointment();             form2.showdialog();         }  private void buttonnewreccuringappt_click(object sender, eventargs e)         {             newrecurringappointment();             recurringappointmentform form3 = new recurringappointmentform();             form3.showdialog();         } 

each button loads form, appointment form , recurring appointment form. want when appointment showing on panel , double click it, edit it. if appointment appointment form should load, or if recurring appointment, recurring appointment form should load , edit it.

handle mousedoubleclick-event, select appointment/recurring appointment coords , open corresponding editor.

private void paneldailyview_mousedoubleclick(object sender, mouseeventargs e) {     iappointment appointment = checkforappointment(e.x, e.y);      if (appointment != null)      {          if (appointment.isrecurring)         {             using(recurringappointmentform form3 = new recurringappointmentform(appointment))                 form3.showdialog();         }         else         {             using(recurringappointmentform form3 = new recurringappointmentform(appointment))                 form3.showdialog();         }     }  }  private void checkforappointment(int x, int y); 

for part, need remember, placed appointments. example if have list each appointment stored, on x,y-coord , size has, can iterate on list in order find rectangle, contains click-coords.