FlexGrid for WinForms | ComponentOne
C1.Win.C1FlexGrid Namespace / C1FlexGridBase Class / MouseEnterCell Event

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    MouseEnterCell Event (C1FlexGridBase)
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    Fires when the mouse enters a cell.
    Public Event MouseEnterCell As RowColEventHandler
    public event RowColEventHandler MouseEnterCell
    Event Data

    The event handler receives an argument of type RowColEventArgs containing data related to this event. The following RowColEventArgs properties provide information specific to this event.

    Gets or sets a value indicating whether the operation should be canceled.  
    Gets the index of the column that caused the event.  
    Gets the index of the row that caused the event.  

    Many applications track mouse movement and react to the cell that is currently under the mouse. This can be done using the System.Windows.Forms.Control.MouseMove event, but that is not very efficient since the event fires many times while the mouse is over the same cell.

    The MouseEnterCell event allows you to implement cell tracking efficiently, since it only fires once until the mouse leaves the cell.

    The code below tracks mouse movement and highlights the cell under the mouse:
    void Form1_Load(object sender, EventArgs e)
      // create style for tracking cell under the mouse
      CellStyle cs = _flex.Styles.Add("track");
      cs.BackColor = Color.Gold;
    void _flex_MouseEnterCell(object sender, RowColEventArgs e)
      // apply tracking style when mouse enters the cell
      _flex.SetCellStyle(e.Row, e.Col, _flex.Styles["track"]);
    void _flex_MouseLeaveCell(object sender, RowColEventArgs e)
      // remove tracking style when mouse leaves the cell
      _flex.SetCellStyle(e.Row, e.Col, (CellStyle)null);
    See Also