业务逻辑>表现层>列表控件 数据选择>手动绑定到数据源

首先是前台页面：

 

  1 <%@ Page Language="C#" AutoEventWireup="true" CodeFile="CH9_DemoForm003.aspx.cs" Inherits="CH9_DemoForm003" %>
  2 
  3 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
  4 
  5 <html xmlns="http://www.w3.org/1999/xhtml">
  6 <head id="Head1" runat="server">
  7     <title>示范以程序控制方式绑定列表类型控件</title>
  8     <style type="text/css">
  9         #form1
 10         {
 11             text-align: center;
 12         }
 13         body
 14         {
 15             font-family: Lucida Sans Unicode;
 16             font-size: 10pt;
 17         }
 18         button
 19         {
 20             font-family: tahoma;
 21             font-size: 8pt;
 22         }
 23         .highlight
 24         {
 25             display: block;
 26             color: red;
 27             font: bold 24px Arial;
 28             margin: 10px;
 29         }
 30         .style1
 31         {
 32             width: 312px;
 33             text-align: left;
 34         }
 35     </style>
 36 </head>
 37 <body>
 38     <form id="form1" runat="server">
 39     <div>
 40       <table border="1">
 41             <tr>
 42                 <td colspan="2">
 43                     Hi
 44                     <b><%=Request.LogonUserIdentity.Name%></b>
 45                     您好，您的 IP 地址是
 46                     <b><%=Request.UserHostAddress%></b>
 47                     <br />欢迎光临并请选择下列选项：
 48                 </td>
 49             </tr>
 50             <tr>
 51                 <td style="text-align: right">
 52                     请选择您的性别：
 53                 </td>
 54                 <td class="style1">
 55                     <asp:RadioButtonList ID="Gender_RadioButtonList" runat="server">
 56                         <asp:ListItem Selected="True" Value="0">女</asp:ListItem>
 57                         <asp:ListItem Value="1">男</asp:ListItem>
 58                     </asp:RadioButtonList>
 59                 </td>
 60             </tr>
 61             <tr>
 62                 <td style="text-align: right">
 63                     请问您已婚或未婚：
 64                 </td>
 65                 <td class="style1">
 66                     <asp:ListBox ID="Marital_ListBox" runat="server" Height="45px">
 67                         <asp:ListItem Selected="True" Value="0">未婚</asp:ListItem>
 68                         <asp:ListItem Value="1">已婚</asp:ListItem>
 69                     </asp:ListBox>
 70                 </td>
 71             </tr>
 72             <tr>
 73                 <td style="text-align: right">
 74                     请选择居住地：
 75                 </td>
 76                 <td class="style1">
 77                     <asp:DropDownList ID="Resident_DropDownList" runat="server" Height="22px" 
 78                         Width="123px">
 79                     </asp:DropDownList>
 80                 </td>
 81             </tr>
 82             <tr>
 83                 <td style="text-align: right">
 84                     请选择您的职业：
 85                 </td>
 86                 <td class="style1">
 87                     <asp:DropDownList ID="Job_DropDownList" runat="server" 
 88                         Height="22px" Width="278px">
 89                     </asp:DropDownList>
 90                 </td>
 91             </tr>            
 92             <tr>
 93                 <td style="text-align: right">
 94                     请选择您的专长：
 95                 </td>
 96                 <td class="style1">
 97                     <asp:DropDownList ID="Speciality_DropDownList" runat="server" 
 98                         Height="22px" Width="278px">
 99                     </asp:DropDownList>
100                 </td>
101             </tr>                        
102         </table>       
103     </div>
104     </form>
105 </body>
106 </html>
107 
108 

 

 

Job_DropDownList和Speciality_DropDownList是没有用数据源控件绑定，而是后台代码手动绑定到数据源。

 

后台代码：

 

 1 using System;
 2 using System.Collections;
 3 using System.Configuration;
 4 using System.Data;
 5 using System.Linq;
 6 using System.Web;
 7 using System.Web.Security;
 8 using System.Web.UI;
 9 using System.Web.UI.HtmlControls;
10 using System.Web.UI.WebControls;
11 using System.Web.UI.WebControls.WebParts;
12 using System.Xml.Linq;
13 using System.Data.SqlClient;
14 using System.Collections.Generic;
15 
16 public partial class CH9_DemoForm003 : System.Web.UI.Page
17 {
18     protected void Page_Load(object sender, EventArgs e)
19     {
20         if (!IsPostBack)
21         {
22             // 创建一个连接对象。
23             using (SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["chtNorthwind"].ConnectionString))
24             {
25 
26                 // 创建一个命令对象。
27                 SqlCommand cmd = new SqlCommand();
28                 cmd.Connection = con;
29                 cmd.CommandText = "SELECT 县市代号, 县市名称 FROM 县市";
30 
31                 // 开启连接。
32                 con.Open();
33 
34                 // 创建一个 SqlDataReader 对象。
35                 using (SqlDataReader dr = cmd.ExecuteReader(CommandBehavior.SingleResult))
36                 {
37                     // 将 DropDownList 控件绑定至 SqlDataReader 对象。                    
38                     this.Resident_DropDownList.DataSource = dr;
39                     this.Resident_DropDownList.DataTextField = "县市名称";
40                     this.Resident_DropDownList.DataValueField = "县市代号";
41                     this.Resident_DropDownList.DataBind();
42                 }
43 
44                 cmd.CommandText = "SELECT 职业类别名称, 职业类别编号 FROM 职业类别";
45                 using (SqlDataReader dr = cmd.ExecuteReader(CommandBehavior.SingleResult))
46                 {
47                     // 将 DropDownList 控件绑定至 SqlDataReader 对象。
48                     this.Job_DropDownList.DataSource = dr;
49                     this.Job_DropDownList.DataTextField = "职业类别名称";
50                     this.Job_DropDownList.DataValueField = "职业类别编号";
51                     this.Job_DropDownList.DataBind();
52                 }
53             }
54 
55             // 创建一个泛型集合来内含 Speciality 对象。
56             List<Speciality> shoppingCart = new List<Speciality>();
57             shoppingCart.Add(new Speciality(1, "数据库设计"));
58             shoppingCart.Add(new Speciality(2, "市场分析"));
59             shoppingCart.Add(new Speciality(3, "交际"));
60             shoppingCart.Add(new Speciality(4, "决策分析"));
61 
62             // 将 DropDownList 控件绑定至泛型集合。
63             Speciality_DropDownList.DataSource = shoppingCart;
64             Speciality_DropDownList.DataTextField = "Name";
65             Speciality_DropDownList.DataValueField = "Id";
66             Speciality_DropDownList.DataBind();
67 
68         }
69 
70     }
71 }
72 
73 public class Speciality
74 {
75     private int _id;
76     public string _name;
77     public int Id
78     {
79         get { return _id; }
80     }
81 
82     public string Name
83     {
84         get { return _name; }
85     }
86 
87     public Speciality(int id, string name)
88     {
89         _id = id;
90         _name = name;
91     }
92 }
93 
94 
95 

 

对于DropDownList 有两种后台绑定方式，一种数据库，另一种泛型集合。

posted @ 2010-08-02 21:19  草珊瑚  阅读(467)  评论(0)  编辑  收藏  举报