Question

I have one gridview in my windows form. Now i’m showing custom tooltip using the following code,

private void Audit_Dg_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e)


{
          if (e.ColumnIndex == 7 || e.ColumnIndex == 8 || e.ColumnIndex == 10 || e.ColumnIndex == 11 && e.RowIndex >= 0)
          {           
              DataGridViewCell cell = this.Audit_Dg.Rows[e.RowIndex].Cells[e.ColumnIndex];

          cell.ToolTipText = "Click Here To View The Message";


      }
}

it showing my message for those cells satisfying my condition and the cell content for all those doesn’t satisfying my condition. is there any way to remove that tool-tips from my grid-view and show only my custom tool-tip?
if there any way,please help me…

Answer 1

Unfortunately, the DataGridView control does not support this. Its ShowCellToolTips property can only be used to disable tooltips globally. The cases where a tooltip is displayed are documented as:

• The value of the DataSource property is not null or the value of the VirtualMode property is true, and a handler for the
  CellToolTipTextNeeded event sets the
  DataGridViewCellToolTipTextNeededEventArgs.ToolTipText property to a
  value other than String.Empty.

• The ToolTipText property of the cell has a value other than String.Empty. Setting this property has no effect when there is a
  CellToolTipTextNeeded event handler because getting the value of the
  property automatically raises the event and returns the ToolTip text
  specified in the event handler.

• The cell value is truncated in the cell display. When the value of the cell ToolTipText property value is String.Empty, the full
  value of the truncated cell value is displayed in the ToolTip.

As you can see, there is no way to avoid the third case: If ShowCellToolTips is true and the value of a cell is truncated, a tooltip containing the full value will be displayed.