DataGridView.UpdateCellValue Method (Int32, Int32)
Forces the control to update its display of the cell at the specified location based on its new value, applying any automatic sizing modes currently in effect.
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)
columnIndex is less than zero or greater than the number of columns in the control minus one.
rowIndex is less than zero or greater than the number of rows in the control minus one.
Use this method when you maintain cell values in virtual mode and you update a value in your custom data cache outside of a CellValuePushed event handler.
This method invalidates the cell, forcing the control to retrieve the new value through the CellValueNeeded event handler and apply any automatic sizing modes that are in effect.
Available since 2.0