当前文件： SmallBusinessStarterKit/App_Code/People/XmlPeopleProvider.cs[3K，2009-6-12 11:54:21]，打开代码结构图

		            
 1using System;
 2using System.Data;
 3using System.Configuration;
 4using System.Web;
 5using System.Xml;
 6using System.Xml.Schema;
 7using System.IO;
 8using System.Collections.Generic;
 9/**//// <summary>
10/// 人员数据的XML数据提供者
11/// </summary>
12public class XmlPeopleProvider : PeopleProvider
13...{
14    private string _xmlFile; 
15    private string _xsdFile; 
16   /**//// <summary>
17   /// 公共构造函数，用于从Web.Config配置文件中获取Xml文件和Schema文件的路径
18   /// </summary>
19    public XmlPeopleProvider()
20    ...{
21        SmallBusinessDataProvidersSection sec = (ConfigurationManager.GetSection("SmallBusinessDataProviders")) as SmallBusinessDataProvidersSection;
22        string xmlFile = sec.PeopleProviders[sec.PeopleProviderName].Parameters["dataFile"];
23        string xsdFile = sec.PeopleProviders[sec.PeopleProviderName].Parameters["schemaFile"];
24        //将这两个文件的路径转换为相对路径并赋给私有变量_xmlFile和_xsdFile。
25        _xmlFile = HttpContext.Current.Request.MapPath("~/App_Data/" + xmlFile);
26        _xsdFile = HttpContext.Current.Request.MapPath("~/App_Data/schemas/" + xsdFile);
27    }
28    /**//// <summary>
29    /// 从XML文件中获取所有的人员数据列表。
30    /// </summary>
31    /// <returns></returns>
32    public override List<Person> GetAllPersons()
33    ...{
34        DataSet dataSet = Util.ReadAndValidateXml(_xmlFile, _xsdFile);
35        List<Person> personList = new List<Person>();
36        //遍历数据表，用DataSet中的数据填充person实体对象。
37        foreach (DataTable t in dataSet.Tables)
38        ...{
39            foreach (DataRow r in t.Rows)
40            ...{
41                if (r["id"] is DBNull || r["visible"] is DBNull || r["firstName"] is DBNull || r["firstName"] is DBNull)
42                    throw new InvalidOperationException(Messages.PersonRequiredAttributesMissing);
43                //(string)r["visible"]
44                Person curr = new Person((string)r["id"], (bool)r["visible"], (string)r["firstName"], (string)r["lastName"]);
45                curr.MiddleName     = (r["middleName"] is DBNull)     ? String.Empty : (string)r["middleName"];
46                curr.Title          = (r["title"] is DBNull)          ? String.Empty : (string)r["title"];
47                curr.Description    = (r["description"] is DBNull)    ? String.Empty : (string)r["description"];
48                curr.Email          = (r["email"] is DBNull)          ? String.Empty : (string)r["email"];
49                curr.Phone          = (r["phone"] is DBNull)          ? String.Empty : (string)r["phone"];
50                curr.Fax            = (r["fax"] is DBNull)            ? String.Empty : (string)r["fax"];
51                curr.StreetAddress  = (r["streetAddress"] is DBNull)  ? String.Empty : (string)r["streetAddress"];
52                curr.City           = (r["city"] is DBNull)           ? String.Empty : (string)r["city"];
53                curr.State          = (r["state"] is DBNull)          ? String.Empty : (string)r["state"];
54                curr.PostalCode     = (r["postalCode"] is DBNull)     ? String.Empty : (string)r["postalCode"];
55                curr.Country        = (r["country"] is DBNull)        ? String.Empty : (string)r["country"];
56                curr.ImageUrl       = (r["imageUrl"] is DBNull)       ? String.Empty : (string)r["imageUrl"];
57                curr.ImageAltText   = (r["imageAltText"] is DBNull)   ? String.Empty : (string)r["imageAltText"];                
58                //添加到泛型列表。
59                personList.Add(curr);
60            }
61        }
62        //返回该范型列表
63        return personList;
64    }
65} 
66
67