在数据库中刷新显示

UserInsert ui = new UserInsert();
            ui.ShowDialog();

//ui.DialogResult
            if (ui.DialogResult == DialogResult.OK)
            {
                SqlConnection conn = new SqlConnection("Data Source=.;Initial Catalog=Test;Integrated Security=True");
                conn.Open();
                SqlDataAdapter da = new SqlDataAdapter("select id,name from users", conn);
                DataTable dt = new DataTable();
                da.Fill(dt);
                conn.Close();
                this.dataGridView1.DataSource = dt;
            }

SqlConnection conn = new SqlConnection("Data Source=.;Initial Catalog=Test;Integrated Security=True");
            conn.Open();
            SqlDataAdapter da = new SqlDataAdapter("insert into users(name,password)values('"+this.textBox1.Text+"','123456')", conn);
            DataTable dt = new DataTable();
            da.Fill(dt);
            conn.Close();
            this.DialogResult = DialogResult.OK;