c# - Find the highest ColumnIndex in DataGridView -

if select more 1 cell in datagridview, how can (in msgbox) value of cell highest columnindex (amongst selected) ?

list<string> = new list<string>();  foreach (datagridviewcell cell in dgvc.selectedcells) {     a.add(cell.value.tostring()); } 

so, need rest of cells in row populate repeating list made selecting cells.

if select more 1 cell in datagridview, how can (in msgbox) value of cell highest columnindex (among selected)

one way use linq order collection of selected cells columnindex , first one.

var selectedcells =dgvc.selectedcells;  var maxcolumn = (from datagridviewcell cell in selectedcells                     orderby cell.columnindex descending                     select cell).firstordefault();  messagebox.show(maxcolumn.value.tostring());     

you should note depending on how user made selection (top bottom or bottom top) either value first row or last row. if matters should order rowindex

another way examine first , last cells in collection , compare indexes . need @ both because depending on how user made selection 1 greater column index change.

var selectedcells = dgvc.selectedcells;  var cellstart = selectedcells[0]; var cellend = selectedcells[selectedcells.count -1];  if (cellstart.columnindex > cellend .columnindex)     messagebox.show(cellstart.value.tostring()); else     messagebox(cellend.value.tostring()); 

note: should check null values if allowuserstoaddrow true