vb.net - Dual check box selection vb / winform -

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i after little bit of help:

i have datagridview control add couple of columns (as check boxes) in order select multiple rows. when select first checkbox column want second selected automatically, can de-selected if required. , if first checkbox deselected, 2nd auto deselected too.

i have working following code:

private sub dgvbikeavailability_cellcontentclick(sender system.object, e system.windows.forms.datagridviewcelleventargs) handles dgvbikeavailability.cellcontentclick      debug.print("row index = " + e.rowindex.tostring + ". column index = " + e.columnindex.tostring + ". column name = ")     'debug.print()     'when bike selected, helmet automatically selected, can deselected if customer requires     if e.columnindex = 0         dgvbikeavailability.rows(e.rowindex).cells(0).value = not dgvbikeavailability.rows(e.rowindex).cells(0).value         dgvbikeavailability.rows(e.rowindex).cells(1).value = dgvbikeavailability.rows(e.rowindex).cells(0).value     end if  end sub

unfortunately, wen datagridview refreshed, column indexes incremented, , column indexes 2 check box columns 2 , 3.

i able refer them name. declared in sub refreshes datagridview:

colbikeselectioncheckbox.headertext = "select bike"     colbikeselectioncheckbox.name = "colselectbike") colhelmetcheckbox.name = "colselecthelmet" dgvbikeavailability.columns.add(colhelmetcheckbox)

but system.windows.forms.datagridviewcelleventargs class not allow me select column name.

any ideas , suggestions appreciated!

edit: more in depth code segment:

 private sub frmbikehire_load(sender system.object, e system.eventargs) handles mybase.load     refreshgrid()     getstaffmember() end sub  'loads , refreshes dgv private sub refreshgrid()     dim integer      'initially fill in rental dates current day     txtdatefrom.text = cstr(monthcalendar1.selectionrange.start)     txtdateto.text = cstr(monthcalendar1.selectionrange.end)      'grab data db, set dgv datasource     startdate = cstr(monthcalendar1.selectionrange.start)     enddate = cstr(monthcalendar1.selectionrange.end)     dtbikeavailability = sqlfuncdb_getdatatable("select * tb_bikedetail bikeid not in (select distinct bikeid tb_bikemovements bikemovementdate between '" + func_convertdatesqlserver(startdate) + "' , '" + func_convertdatesqlserver(enddate) + "') , bikeid not in (select tb_bikemovements.bikeid tb_bikemovements join (select bikeid, max(bikemovementdate) bmd tb_bikemovements bikemovementdate < '" + func_convertdatesqlserver(startdate) + "' group bikeid) lastmove on lastmove.bikeid=tb_bikemovements.bikeid , lastmove.bmd=tb_bikemovements.bikemovementdate bikemovementtype = '0')")     dvbikeavailability = new dataview(dtbikeavailability)     dgvbikeavailability.datasource = dvbikeavailability      'switch off columns     = 0 dgvbikeavailability.columns.count - 1         dgvbikeavailability.columns(i).visible = false     next      'displays relevant column(s)     dgvbikeavailability.columns("bikename").visible = true     dgvbikeavailability.columns("bikename").headertext = "bike name"     dgvbikeavailability.columns("bikestyle").visible = true     dgvbikeavailability.columns("bikestyle").headertext = "bike style"     dgvbikeavailability.columns("bikecolour").visible = true     dgvbikeavailability.columns("bikecolour").headertext = "bike colour"      'remove line program deployment     dgvbikeavailability.columns("bikeid").visible = true     dgvbikeavailability.columns("bikeid").headertext = "bike number"      'add new check box column selecting bike      dim colbikeselectioncheckbox new datagridviewcheckboxcolumn     colbikeselectioncheckbox.datapropertyname = "propertyname"     colbikeselectioncheckbox.headertext = "select bike"     colbikeselectioncheckbox.name = "colselectbike"     dgvbikeavailability.columns.add(colbikeselectioncheckbox)      'add new column selecting helmet - consider adding default setting     dim colhelmetcheckbox new datagridviewcheckboxcolumn     colhelmetcheckbox.datapropertyname = "propertyname"     colhelmetcheckbox.headertext = "helmet?"     colhelmetcheckbox.name = "colselecthelmet"     dgvbikeavailability.columns.add(colhelmetcheckbox)      dgvbikeavailability.autosizecolumnsmode = datagridviewautosizecolumnsmode.fill  end sub  private sub monthcalendar1_datechanged(sender system.object, e system.windows.forms.daterangeeventargs) handles monthcalendar1.datechanged     refreshgrid() end sub  private sub dgvbikeavailability_cellclick(sender object, e     system.windows.forms.datagridviewcelleventargs) handles dgvbikeavailability.cellclick     debug.print("row index = " + e.rowindex.tostring + ". column index = " + e.columnindex.tostring + ". column name = " + dgvbikeavailability.rows(e.rowindex).cells("colselectbike").owningcolumn.tostring)      if dgvbikeavailability.columns(e.columnindex).name = "colselectbike"         dgvbikeavailability.rows(e.rowindex).cells("colselectbike").value = not dgvbikeavailability.rows(e.rowindex).cells("colselectbike").value         dgvbikeavailability.rows(e.rowindex).cells("colselecthelmet").value = dgvbikeavailability.rows(e.rowindex).cells("colselectbike").value     end if  end sub

i unsure why doesn't work. each time calendar control changed refreshes datagridview, increasing column index.

you can use column index provided datagridviewcelleventargs class retrieve column , name compare.

so like:

if dgvbikeavailability.columns(e.columnindex).name == "colselectbike"     ' logic here end if

for referencing columns within code toggle checkboxes, can happily use names, , in fact not need index provided event args. event args index appears used check 1 of desired columns selected.

dgvbikeavailability.rows(e.rowindex).cells("colselectbike").value = not dgvbikeavailability.rows(e.rowindex).cells("colselectbike").value dgvbikeavailability.rows(e.rowindex).cells("colselecthelmet").value = dgvbikeavailability.rows(e.rowindex).cells("colselectbike").value

although code above should work appears odd happening grid. quick solution instead of using .add() use .insert() method of datagridview, provided index parameter, allowing directly control column goes.


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