的数据表是根据从数据库查询中提取数据行的无序和未经过滤的集合。
该数据视图（你可以有多个）是同一数据的过滤和/或有序视图。

The Datatable is the unordered and unfiltered collection of DataRows extracted according to your query from your database.
The DataView (and you could have more than one) is a filtered and/or ordered view of the same data.

例如：

 using(SqlConnection cn = GetConnection())
 {
     cn.Open();
     SqlDataAdapter da = new SqlDataAdapter("SELECT * FROM Customers", cn);
     DataTable dt = new DataTable();
     da.Fill(dt);

     // At this point dt is filled with datarows extracted from the database in no particular order 
     // And the DefaultView presents the same record organization (or lack of), but...

     // Order on the default view by CustomerName
     dt.DefaultView.Sort = "CustomerName";
     foreach(DataRowView rv in dt.DefaultView)
          Console.WriteLine(rv["CustomerName"].ToString();

     // A new dataview with only a certain kind of customers ordered by name
     DataView dvSelectedCust = new DataView(dt, "CreditLevel = 1", "CustomerName", DataViewRowState.Unchanged);
     foreach(DataRowView rv in dvSelectedCust)
          Console.WriteLine(rv["CustomerName"],ToString();



 }

当然，创建和维护一个数据视图是一个性能命中，因此你可以选择使用它，只有当你真的需要它

Of course creating and maintaining a DataView is an hit on performances and thus you have the choice to use it only when you really need it