一种新的嵌套绑定的方法

以前做嵌套，要么是在多次访问数据库，要么是把数据取出来，然后分别使用DataView的RowFilter来做，今天发现了一种新的方法，使用DataSet的Relations可以很方便的做嵌套

方法主要是在dataset的表之间建立关联，然后在前台html视图里使用




DataSource='<%

# ((DataRowView)Container.DataItem).Row.GetChildRows("MyRelation") %>'
具体例子如下：
这里用的是两个repeater嵌套

绑定代码：


Business.Customer obj = new Zeda.CRM.Business.Customer();


            DataSet ds = obj.up_CRM_ProductSearchList(this.KeyWord);


            ds.Relations.Add("MyRelation",ds.Tables[0].Columns["CustomerId"],ds.Tables[1].Columns["CustomerId"]);




            ParentRep.DataSource = ds.Tables[0].DefaultView;


            //ParentRep.DataBind();


            AspNetPager1.RecordCount = ds.Tables[0].Rows.Count;


            Page.DataBind();


            ds.Dispose();


            obj.Dispose();
html视图代码

 


<asp:repeater id="ParentRep" Runat="server">


                                            <ItemTemplate>


                                                <tr>




                                                    <td height=25 width=40%>    <a href='CustomerDetail.aspx?CustomerId=<%# DataBinder.Eval(Container.DataItem,"CustomerId")%>'><%

# DataBinder.Eval(Container.DataItem,"Name")%></a></td>


                                                    <td><asp:Repeater ID=sonRep Runat=server DataSource='<%# ((DataRowView)Container.DataItem).Row.GetChildRows("MyRelation") %>'>


                                                            <ItemTemplate>




                                                                <a href='ProductDetail.aspx?ProductId=<%# DataBinder.Eval(Container.DataItem,"[ProductId]")%>'><%

# DataBinder.Eval(Container.DataItem, "[/"ProductName/"]")%></a>


                                                            </ItemTemplate>


                                                            <SeparatorTemplate>


                                                                  


                                                            </SeparatorTemplate>


                                                        </asp:Repeater></td>


                                                </tr>


                                            </ItemTemplate>


                                            <SeparatorTemplate>


                                                <tr>


                                                    <td height="1" background="../images/xian01.gif" colspan="2"></td>


                                                </tr>


                                            </SeparatorTemplate>


                                        </asp:repeater>