dataSource转换DataView问题
DataSet dataSet = new DataSet();
SqlDataAdapter adapter = new SqlDataAdapter("select * from users",connection);
adapter.Fill(dataSet,"Users");
dataGridView1.DataSource = dataSet.Tables["users"];
为什么这样可以
DataView dv = dataSet.Tables["users"].DefaultView;
dv.Sort = "userid";
这样不可以
DataView dv = dataGridView1.DataSource as DataView;
dv.Sort = "userid";