private void modificarToolStripMenuItem1_Click(object sender, EventArgs e)
{
Modificar_Producto objModfi = new Modificar_Producto();
objModfi.MdiParent = this;
objModfi.Show();
}
private void button1_Click(object sender, EventArgs e)
{
int indice;
indice = dataGridView1.CurrentRow.Index;
Modificar_Producto obMod = new Modificar_Producto();
obMod.textBox1.Text = Convert.ToString(dataGridView1.Rows[indice].Cells[1].Value);
obMod.precio_compra.Value = Convert.ToInt32(dataGridView1.Rows[indice].Cells[3].Value);
obMod.precio_venta.Value = Convert.ToInt32(dataGridView1.Rows[indice].Cells[4].Value);
obMod.txt_proveedor.Text = Convert.ToString(dataGridView1.Rows[indice].Cells[2].Value);
obMod.txt_categoria.Text = Convert.ToString(dataGridView1.Rows[indice].Cells[5].Value);
val = Convert.ToInt32(dataGridView1.Rows[indice].Cells[0].Value);
obMod.id = val;
this.Close();
obMod.Show();
}