dataGridView更新数据

大家好！ 我现在在dataGridView中修改、添加和删除数据，请问我要怎么做才能将更改的数据返回到数据库中？以下是部分代码。愿赐教！
string connstring = @"server=localhost;integrated security=true;database=ps";
SqlConnection conn = new SqlConnection(connstring);
conn.Open();
DataSet ds = new DataSet();
try
{
string sql = @"select * from worker_table where worker_id='" + this.textBox1.Text.Trim() + "'";
SqlDataAdapter sdal = new SqlDataAdapter(sql, conn);
sdal.Fill(ds, "tb1");



BindingSource bs = new BindingSource();
bs.DataMember = "tb1";
bs.DataSource = ds;
this.dataGridView1.DataSource = bs;
}