private void button3_Click(object sender, EventArgs e)
        {
            var aa = new AddActivity(Int32.Parse(requestIdBox1.Text), dateTimePicker1.Value, dateTimePicker2.Value);

            aa.ShowDialog();
            activityFlag = true;
        }
        private void button3_Click(object sender, EventArgs e)
        {
            AddActivity add = new AddActivity(Int32.Parse(textBox1.Text), dateTimePicker2.Value, dateTimePicker1.Value);

            add.Show();

            var result = SQLmanager.SearchActivity(this.textBox1.Text.ToString());

            dataGridView1.DataSource = result;

            var result1 = SQLmanager.SearchActivity(this.textBox1.Text.ToString());

            dataGridView1.DataSource = result1;

            /*dataGridView1.Update();
             * dataGridView1.Refresh();
             * var result = SQLmanager.SearchActivity(this.textBox1.Text.ToString());
             * dataGridView1.DataSource = result;*/
        }