Cannot edit the data in a cell of a datagridview in c# -

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i have problems datagridview in c#. editmode property of editonkeystrokeorf2 , readonly property false. , datasourse of binded list. double clicked on 1 cell(for example, data 40), edit it(change 60). if press enter, data of cell not updated, still 40. i'm wondering reason. tried cellendedit event, , added breakpoint here.

 private void datagridview_cellendedit(object sender, datagridviewcelleventargs e)  {      datagridview.refreshedit();      if (e.columnindex==0)      {          double key = convert.todouble(datagridview.rows[e.rowindex].cells[0].value);      }  }

then run program, double click on cell in first column, changed it, pressed enter. , came breakpoint, , data got still old one. knows reason? how can edit clicking on it? lot help!


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