wpf - DataGrid Placeholder Row Header customization -

i have wpf datagrid, datasource observablecollection<myitem>

myitem has property called hour, automatically generated. hour used rowheader in datagrid.

if add new item collection, hour property filled , rowheader display it. have no control on rowheader of "placeholder row".

how can achieve rowheader of placeholder row * character, normal rows have hour property rowheader?

removed hour myitem (not needed there), , made rowheader auto-generated. if row.item not myitem * gets set row.header programatically.

    void datagrid_loadingrow(object sender, datagridroweventargs e)     {         if (e.row.item myitem)         {             e.row.header = (e.row.getindex()).tostring("d2");         }         else // row {newitemplaceholder}         {             e.row.header = "✲";         }     }