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private void gridControl1_Click(object sender, System.EventArgs e) { this.gridControl1.BaseStylesMap["Standard"].StyleInfo.ReadOnly = true; this.gridControl1[2,2].ReadOnly = false; }Are you trying to do this for a GridDataBoundGrid? In a GridDataBoundGrid, you cannot directly set any cell specific properties except the CellValue (or Text). So you will have to handle the Model.QueryCellInfo event, and set the readonly property there for specific cells.
//hook the event this.gridDataBoundGrid1.Model.QueryCellInfo += new GridQueryCellInfoEventHandler(grid_QueryCellInfo); //the handler private void grid_QueryCellInfo(object sender, GridQueryCellInfoEventArgs e) { if(e.ColIndex == 2 && e.RowIndex == 2) e.Style.ReadOnly = false; }