如何在 C# 中同时关注文本框和数据网格视图？

Question

我们有文本框和两个 datagridview.. 当我想在 textbox1 中写入时，这个 textbox1 过滤 datagridview..

Answer 1

private void textBox1_KeyDown（对象发送者，KeyEventArgs e）{

        if (e.KeyCode == Keys.Down)
            
        {
            SendKeys.Send("{Down}");
            
            foreach(DataGridViewRow row in dataGridView2.Rows)
            {
                dataGridView2.Rows[CurrentRow + 1].Selected = true;
                dataGridView2.Focus();
               
            }

        }
        else if (e.KeyCode == Keys.Enter && dataGridView2.Rows.Count>0 && textBox1.TextLength>0)
        {
            txtQty.Text = "1";
            dataGridView2.Focus();
            cmbProducts.Text = dataGridView2.SelectedRows[0].Cells[2].Value.ToString();
            txtPrice.Text = dataGridView2.SelectedRows[0].Cells[3].Value.ToString();
            textBox1.Text = "";
            
            txtQty.Focus();

        }
       

    }