Home / Questions / 140226
Accepted
Shassain
Asked: 2020-02-22 06:30:43 +0800 CST 2020-02-22 06:30:43 +0800 CST

How to Display Menu when right clicking on a DataGridView C#?

  • 772

I explain what I need: I want that, when I right click on a cell , DataGridViewa menu is displayed on it (on the cell).

The problem is: That when I right click the menu is always displayed at the top of the menu DataGridViewand NOT in the clicked cell.

Image of the bug.right click error

I right-clicked where the red dot is but the menu still appears at the top of the DataGridView, and so on anywhere I right-clicked.

Time to show code: The following code is the function I have so far.

    private void lista_dias_CellMouseClick(object sender, DataGridViewCellMouseEventArgs e)
    {
        if (e.Button == MouseButtons.Right)
        {
            ContextMenuStrip menu = new ContextMenuStrip();
            int posiscion = lista_dias.HitTest(e.X, e.Y).RowIndex;
            // if (posiscion >= 0) {
            menu.Items.Add("agregar").Name = "AGREGAR";
            menu.Items.Add("eliminar").Name = "Eliminar";
            menu.Items.Add("detalles").Name = "DETALLES";
            //}
            menu.Show(lista_dias, new Point(e.X, e.Y));
        }
    }

Said event was created automatically from the interfaces that C# has, the event is CellMouseClick.

In advance thanks for the help.

c#

2 Answers

  1. Best Answer

    It occurs to me that you can do this by getting the coordinate of each cell.

    Here you can get more information about the DataGridView.GetCellDisplayRectangle Method

    Assuming your DataGridViewname is : day_list :

    private void lista_dias_CellMouseClick(object sender, DataGridViewCellMouseEventArgs e)
{
    if (e.Button == MouseButtons.Right)
    {

       lista_dias.CurrentCell = lista_dias.Rows[e.RowIndex].Cells[e.ColumnIndex];

       ContextMenuStrip menu = new ContextMenuStrip();
       menu.Items.Add("agregar").Name = "AGREGAR";
       menu.Items.Add("eliminar").Name = "Eliminar";
       menu.Items.Add("detalles").Name = "DETALLES";


       //Obtienes las coordenadas de la celda seleccionada. 
       Rectangle coordenada = lista_dias.GetCellDisplayRectangle(e.ColumnIndex, e.RowIndex, false);

       int anchoCelda = coordenada.Location.X; //Ancho de la localizacion de la celda
       int altoCelda = coordenada.Location.Y;  //Alto de la localizacion de la celda

       //Y para mostrar el menú lo haces de esta forma:  
       int X = anchoCelda + lista_dias.Location.X;
       int Y = altoCelda + lista_dias.Location.Y + 15;

       menu.Show(lista_dias, new Point(X, Y));
    }
}

    In this way, what you request works perfectly for you. This line: lista_dias.CurrentCell = lista_dias.Rows[e.RowIndex].Cells[e.ColumnIndex];is to place the focus on the cell that is given the Click Derecho. If you don't want to place the focus on the cell you can use lista_dias.BeginEdit(true);the other line mentioned instead, this will show you the menu in the cell and the cell that had the focus before clicking will not lose focus.

    The result obtained is the following:

    enter image description here

    I hope it helps you... Greetings!

    • 5

  2. take this structure, it works very well for me.

    I explain: Inside the grid, you right click on your record, then a tab is displayed, where it gives you an option, in my case, "Delete Product", immediately, the selected record is deleted and in turn it is deleted from the database.

    For info about the technology I apply: Entity Framework, C# and SQL server.

       public int rowIndex { get; set; }


          private void dgvProductos_CellMouseUp(object sender, DataGridViewCellMouseEventArgs e)
                {
                    if (e.Button == MouseButtons.Right)
                    {
                        this.dgvProductos.Rows[e.RowIndex].Selected = true;
                        this.rowIndex = e.RowIndex;
                        this.dgvProductos.CurrentCell = this.dgvProductos.Rows[e.RowIndex].Cells[0];
                        this.contextMenuStrip1.Show(this.dgvProductos, e.Location);
                        contextMenuStrip1.Show(Cursor.Position);
                    }
                }

                private void contextMenuStrip1_Click(object sender, EventArgs e)
                {
                    ProductosEF _bdVentas = new ProductosEF();

                    if (MessageBox.Show("¿Desea eliminar el producto?", "¡Advertencia!", MessageBoxButtons.YesNo, MessageBoxIcon.Warning) == DialogResult.Yes)
                    {
                        string _codigo_barra = dgvProductos.Rows[rowIndex].Cells[1].Value.ToString();
                        _bdVentas.DeleteProduct(_codigo_barra);

                    }
                    _bdVentas.SaveChanges();

                    CargarGrid();
                }

    I hope in one way or another I have helped to solve your problem or at least an idea.

    • 2