CODEWITHSUNDEEP
c#winformsdatagridviewcell
Ahmed Faizan
Ahmed Faizan

Reputation: 456

How to identify the specific cell hovered over in DataGridView

I have put a picture at the end of all datagridview rows to delete row when pressed. enter image description here I want to change color of that picture on specific cell mouseover (Inorder to indicate it is an interactive button to the user).

However in all solutions I found full DGV mouseover is explianed. What I need: Learn how to find the specific cell hovered over during cell mouseover.

Upvotes: 2

Views: 5378

Answers (2)

Rodrigo Rodrigues
Rodrigo Rodrigues

Reputation: 8556

Old question, and @titol's answer is good, but I don't like to use the event CellMouseMove for this (it triggers too often).

I suggest capturing when the mouse enter with CellMouseEnter and, of course, CellMouseLeave. Like this:

    void dataGridView1_CellMouseEnter(object sender, DataGridViewCellEventArgs e) {
        if (e.RowIndex < 0 || e.ColumnIndex < 0) return;
        var gv = sender as DataGridView;
        var column = gv.Columns[e.ColumnIndex];
        if (myLogicToCheckIfIsTrashButtonColumn(column)) {
            gv[e.ColumnIndex, e.RowIndex].Style.BackColor = Color.Black;
            gv.InvalidateCell(gv.Rows[e.RowIndex].Cells[e.ColumnIndex]);
        }
    }

    void dataGridView1_CellMouseLeave(object sender, DataGridViewCellEventArgs e) {
        if (e.RowIndex < 0 || e.ColumnIndex < 0) return;
        var gv = sender as DataGridView;
        var column = gv.Columns[e.ColumnIndex];
        if (myLogicToCheckIfIsTrashButtonColumn(column)) {
            gv[e.ColumnIndex, e.RowIndex].Style.BackColor = Color.White;
            gv.InvalidateCell(gv.Rows[e.RowIndex].Cells[e.ColumnIndex]);
        }
    }

Upvotes: 2

titol
titol

Reputation: 1149

If this is WindowsForms:

//when mouse is over cell
    private void dataGridView1_CellMouseMove(object sender, DataGridViewCellMouseEventArgs e)
    {
        if (e.RowIndex >= 0 && e.ColumnIndex >= 0)
        {
            dataGridView1[e.ColumnIndex, e.RowIndex].Style.BackColor = Color.Black;
        }
    }
//when mouse is leaving cell
    private void dataGridView1_CellMouseLeave(object sender, DataGridViewCellEventArgs e)
    {
        if (e.RowIndex >= 0 && e.ColumnIndex >= 0)
        {
            dataGridView1[e.ColumnIndex, e.RowIndex].Style.BackColor = Color.White;
        }
    }

Upvotes: 5

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