در این مقاله قصد داریم تا نحوه ایجاد لیست ها تو در تو را در Asp.Net پیاده سازی کنیم .

در مرحله اول یک کلاس برای آدرس مربوط به مشتریان ایجاد میکنیم

public class Address
{
          public string Country
          {
                   get;
                   set;
          }
          public string State
          {
                   get;
                   set;
          }
          public string City
          {
                   get;
                   set;
          }
} 

در مرحله دوم یک کلاس برای مشتریان ایجاد میکنیم

public class Customer
{
          public string CustomerName
          {
                   get;
                   set;
          }
          public string Email
          {
                   get;
                   set;
          }
          public string Website
          {
                   get;
                   set;
          }
          public List<Address> Address
          {
                   get;
                   set;
          }
}

در مرحله صفحه Customer.Aspx  را ایجاد میکنیم

<asp:ListView runat="server" ItemPlaceholderID="placeHolderCustomer" ID="LstCustomers">
            <LayoutTemplate>
                <div>
                    <asp:PlaceHolder runat="server" ID="placeHolderCustomer" />
                </div>
            </LayoutTemplate>
            <ItemTemplate>
                 Customer Name:<asp:Label ID="Label1" Text='<%# Eval("CustomerName") %>' runat="server" /><br />
                 Email:<asp:Label ID="Label2" Text='<%# Eval("Email") %>' runat="server" /><br />
                 Website:<asp:Label ID="Label3" Text='<%# Eval("Website") %>' runat="server" />
                <asp:ListView ID="ListView1" runat="server" DataSource='<%# Eval("Address") %>' ItemPlaceholderID="addressPlaceHolder">
                    <LayoutTemplate>
                        <div style="padding-left: 30px;">
                            <table border="1" cellpadding="0" cellspacing="0">
                                <asp:PlaceHolder runat="server" ID="addressPlaceHolder" />
                             </table>
                        </div>
                        <hr />
                    </LayoutTemplate>
                    <ItemTemplate>

                        <tr>
                            <td>
                                <asp:Label ID="Label4" Text='<%# Eval("Country") %>' runat="server" />
                            </td>
                            <td>
                                <asp:Label ID="Label3" Text='<%# Eval("State") %>' runat="server" />
                            </td>
                            <td>

                                <asp:Label ID="Label5" Text='<%# Eval("City") %>' runat="server" />
                            </td>
                        </tr>
                    </ItemTemplate>
                </asp:ListView>
            </ItemTemplate>
        </asp:ListView> 

و در مرحله آخر و در رویداد Load صفحه لیستی میسازیم و به ListView متصل میکنیم

<asp:ListView runat="server" ItemPlaceholderID="placeHolderCustomer" ID="LstCustomers">
            <LayoutTemplate>
                <div>
                    <asp:PlaceHolder runat="server" ID="placeHolderCustomer" />
                </div>
            </LayoutTemplate>
            <ItemTemplate>
                 Customer Name:<asp:Label ID="Label1" Text='<%# Eval("CustomerName") %>' runat="server" /><br />
                 Email:<asp:Label ID="Label2" Text='<%# Eval("Email") %>' runat="server" /><br />
                 Website:<asp:Label ID="Label3" Text='<%# Eval("Website") %>' runat="server" />
                <asp:ListView ID="ListView1" runat="server" DataSource='<%# Eval("Address") %>' ItemPlaceholderID="addressPlaceHolder">
                    <LayoutTemplate>
                        <div style="padding-left: 30px;">
                            <table border="1" cellpadding="0" cellspacing="0">
                                <asp:PlaceHolder runat="server" ID="addressPlaceHolder" />
                             </table>
                        </div>
                        <hr />
                    </LayoutTemplate>
                    <ItemTemplate>

                        <tr>
                            <td>
                                <asp:Label ID="Label4" Text='<%# Eval("Country") %>' runat="server" />
                            </td>
                            <td>
                                <asp:Label ID="Label3" Text='<%# Eval("State") %>' runat="server" />
                            </td>
                            <td>

                                <asp:Label ID="Label5" Text='<%# Eval("City") %>' runat="server" />
                            </td>
                        </tr>
                    </ItemTemplate>
                </asp:ListView>
            </ItemTemplate>
        </asp:ListView> 

Step 4

Add the following code in Page Load of Customer.aspx:

List<Customer> objCustomers = new List<Customer>()
{
          new Customer()
          {
                    CustomerName="Customer 1",
                    Email="Customer1@Customer.com",
                    Website="www.Customer1.com",
                    Address=new List<Address>()
                    {
                             new Address()
                             {
                                      Country="Country1",
                                      State="State1",
                                      City="City1",
                             },
                             new Address()
                             {
                                      Country="Country1",
                                      State="State1",
                                      City="City2",
                             },
                             new Address()
                             {
                                      Country="Country1",
                                      State="State2",
                                      City="City3",
                             }
                    }
 
          },
          new Customer()
          {
                    CustomerName="Customer 2",
                    Email="Customer2@Customer.com",
                    Website="www.Customer2.com",
                    Address=new List<Address>()
                    {
                             new Address()
                             {
                                      Country="Country2",
                                      State="State2",
                                        City="City4",
                             },
                             new Address()
                             {
                                      Country="Country2",
                                      State="State2",
                                      City="City5",
                             },
                             new Address()
                             


                                      Country="Country2",
                                      State="State2",

                                      City="City6",
                             }
                    }
          },
          new Customer()
          {
                    CustomerName="Customer 3",
                    Email="Customer3@Customer.com",
                    Website="www.Customer3.com",
                    Address=new List<Address>()
                    {

                             new Address()
                             {
                                      Country="Country3",
                                      State="State4",

                                      City="City7",
                             },
                             new Address()
                             {
                                      Country="Country3",
                                      State="State5",
                                      City="City8",

                             },

                             new Address()
                             {
                                      Country="Country3",
                                      State="State6",
                                      City="City9",
                             }
                    }
          }
};

LstCustomers.DataSource = objCustomers;
LstCustomers.DataBind();