DataGridView.CellMouseEnter Event

Definition

Occurs when the mouse pointer enters a cell.

C#
public event System.Windows.Forms.DataGridViewCellEventHandler CellMouseEnter;
C#
public event System.Windows.Forms.DataGridViewCellEventHandler? CellMouseEnter;

Event Type

Examples

The following code example shows a CellMouseEnter event handler in a Tic-Tac-Toe game implementation that uses image columns in a DataGridView control. The event handler uses the cell value to determine the cursor and ToolTip to display.

This code is part of a larger example shown in How to: Work with Image Columns in the Windows Forms DataGridView Control.

C#
private void dataGridView1_CellMouseEnter(object sender,
    DataGridViewCellEventArgs e)
{
    Bitmap markingUnderMouse = (Bitmap)dataGridView1.
           Rows[e.RowIndex].
           Cells[e.ColumnIndex].Value;

    if (markingUnderMouse == blank)
    {
        dataGridView1.Cursor = Cursors.Default;
    }
    else if (markingUnderMouse == o || markingUnderMouse == x)
    {
        dataGridView1.Cursor = Cursors.No;
        ToolTip(e, true);
    }
}

private void ToolTip(DataGridViewCellEventArgs e, bool showTip)
{
    DataGridViewImageCell cell = (DataGridViewImageCell)
        dataGridView1
        .Rows[e.RowIndex].Cells[e.ColumnIndex];
    DataGridViewImageColumn imageColumn =
        (DataGridViewImageColumn)
        dataGridView1.Columns[cell.ColumnIndex];

    if (showTip)
    {
        cell.ToolTipText = imageColumn.Description;
    }
    else { cell.ToolTipText = String.Empty; }
}

private void dataGridView1_CellMouseLeave(object sender,
    DataGridViewCellEventArgs e)
{
    ToolTip(e, false);
    dataGridView1.Cursor = Cursors.Default;
}

Remarks

For more information about how to handle events, see Handling and Raising Events.

Applies to

Product Versions
.NET Framework 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
Windows Desktop 3.0, 3.1, 5, 6, 7, 8, 9

See also