如何使用表适配器 C# SQL 更新 DataGridView 更改？

Question

   public void DoUpdate()
    {
        SqlConnection con = new SqlConnection(string connection);
        con.Open();
        SqlDataAdapter adapter = new SqlDataAdapter("SELECT * FROM table",con);
        DataTable dt = new DataTable();
        adapter.Fill(dt);
        this.dataGridView1.DataSource = dt;
        this.dataGridView1.Update();
        this.dataGridView1.Refresh();
        con.Close();
    }
}

我在我的 Stock_table 中进行更改后使用此方法，但数据网格仍然显示没有更改的旧数据，我只在重置我的程序后看到表中所做的更改

Answer 1

   public void DoUpdate()
    {
        SqlConnection con = new SqlConnection(string connection);
        con.Open();
        SqlDataAdapter adapter = new SqlDataAdapter("SELECT * FROM table",con);
        DataTable dt = new DataTable();
        adapter.Fill(dt);
        this.dataGridView1.DataSource = dt;
        con.Close();
    }
}
The right way to update an datagridview 
why is this a method because if you are using another form to make the data insert in your table you only need to make a constructor with the previous form and after the insert you only call this method
Thanks for the help