dataset通过Relations实现联动的问题

Question

sqlDataAdapter1.Fill(dataSet11,"Orders");
sqlDataAdapter2.Fill(dataSet11,"Order Details");cmg=(CurrencyManager)this.BindingContext[dataSet11.Tables["Orders"]];
//建立父子关系
dataSet11.Relations.Add("OR",dataSet11.Tables["Orders"].Columns["OrderID"],dataSet11.Tables["Order Details"].Columns["OrderID"]);//主表的OrderID绑定到textBox1，子表绑定到DataSource=dataSet11
textBox1.DataBindings.Add("Text",dataSet11.Tables["Orders"],"OrderID");
dataGrid1.DataSource=dataSet11;
dataGrid1.DataMember="Orders.OR";现在我通过cmg.Position--或cmg.Position＋＋来改变textBox1的值，可为什么dataGrid1的值不跟着联动？请大家帮帮我

Answer 1

直接设置dataGrid1.DataSource=dataSet11.Tables["Order Details"];

Answer 2

BindingManagerBase myBindingchild = this.BindingContext[dataSet11,"Orders.OR"];DataGrid1.DataBinding(dataSet11,"Orders.OR");

Answer 3

给几篇文章来解决问题,
http://blog.csdn.net/zhzuo/archive/2005/01/03/238273.aspx
http://blog.csdn.net/zhzuo/archive/2004/08/06/67016.aspx