Nbear的接口主要是调用ObjectConvertor类的3大类方法：ToObject,ToList,ToDataTable。
主要功能：不同类型的对象可以通过类型属性的映射,进行转换，包括类与接口。对于两种类型毫无继承关系,且两种类型的数据需要转换时，Nbear是很有用的。
另外Nbear是开源代码,在类型转换的过程中,主要使用 System.Reflection.Emit;反射来取值并赋值到新对象。使用IL编程一定程度上提高了程序的效率。
要研究IL的网友，可以认真研究一下其源码。
数据模型 1 public interface IUser 2 { 3 4 string Name 5 { 6 get; 7 set; 8 } 9 10 int Age11 {12 get;13 set;14 }15 16 }17 18 public class User : IUser19 {20 //需要无参数构造函数21 public User()22 {23 }24 public User(string name, int age, bool isvisible)25 {26 this.Name=name;27 this.Age=age;28 this.IsVisible=isvisible;29 }30 31 public string Name32 {33 get;34 set;35 }36 37 public int Age38 {39 get;40 set;41 }42 public bool IsVisible43 {44 get;45 set;46 }47 48 } 1 using NBear.Mapping; 2 using NBearLiteDemo.Model; 3 class Program 4 { 5 //ObjectConvertor类:: ToObject；ToList；ToDataTable 6 static void Main(string[] args) 7 { 8 9 10 User user=new User("Jefftary", 24, true); 11 User[] users=new User[] { user,new User("Jackbaby",19,true)}; 12 13 User outputObject1 = ObjectConvertor.ToObject (user); 14 User outputObject2 = ObjectConvertor.ToObject (user); 15 16 //User-Others 17 DataRow outputObject3 = ObjectConvertor.ToObject (user); 18 Hashtable outputObject4 = ObjectConvertor.ToObject (user); 19 NameValueCollection outputObject5 = ObjectConvertor.ToObject (user); 20 Dictionary outputObject6 = ObjectConvertor.ToObject >(user); 21 22 //Others->User 23 User outputObject31 = ObjectConvertor.ToObject (outputObject3); 24 User outputObject41 = ObjectConvertor.ToObject (outputObject4); 25 User outputObject51 = ObjectConvertor.ToObject (outputObject5); 26 User outputObject61 = ObjectConvertor.ToObject (outputObject5); 27 28 object[] list=new object[] { outputObject1, outputObject2, outputObject3, outputObject4, outputObject5, outputObject6 }; 29 object[] list2=new object[] { outputObject31, outputObject41, outputObject51, outputObject61 }; 30 31 //Array->List 32 List userList = ObjectConvertor.ToList (users); 33 34 //Array->DataTable->List ->DataTable 35 DataTable userTable = ObjectConvertor.ToDataTable(users, typeof(User)); 36 List userList1 = ObjectConvertor.ToList (userTable); 37 List userList2 = ObjectConvertor.ToList (userTable); 38 DataTable userTable2=ObjectConvertor.ToDataTable(userList, typeof(User)); 39 40 41 ShowList(list,"[Object]",true); 42 ShowList(list2, "[Object-Parse]", true); 43 44 ShowList(users, "[Array]"); 45 46 ShowList(userTable, "[ToDataTable(users, typeof(User))]"); 47 ShowList(userList, "[ToList (users)]"); 48 49 ShowList(userList1, "[ToList (userTable)]"); 50 ShowList(userList2, "[ToList (userTable)]"); 51 ShowList(userTable2, "[ToDataTable(userList, typeof(User))]"); 52 53 54 var th=Type.GetTypeHandle(3); 55 56 Console.WriteLine(th); 57 Console.ReadKey(); 58 } 59 60 static void Show(object obj,bool showType=true) 61 { 62 string printFormat="{0}:\r\n\t\t{1}\t{2}\t{3}\r\n"; 63 if(!showType) 64 printFormat="\trow:\t{1}\t{2}\t{3}"; 65 66 Type type=obj.GetType(); 67 if (type.Equals(typeof(User))) 68 { 69 var user=obj as User; 70 Console.WriteLine(string.Format(printFormat, type, user.Name, user.Age, user.IsVisible)); 71 } 72 else 73 { 74 //反射获取索引器 this[Name] 75 var prop = type.GetProperty("Item", new Type[] { typeof(string) }); 76 if (prop!=null) 77 { 78 //DataRow,Hashtable,Dictionary,NameValueCollection 79 var name= prop.GetGetMethod().Invoke(obj, new object[] { "Name" }); 80 var age= prop.GetGetMethod().Invoke(obj, new object[] { "Age" }); 81 var visible= prop.GetGetMethod().Invoke(obj, new object[] { "IsVisible" }); 82 Console.WriteLine("this[Name]:"); 83 Console.WriteLine(string.Format(printFormat, type, name, age, visible)); 84 } 85 } 86 87 //else if (type.Equals(typeof(NameValueCollection))) 88 //{ 89 // var nv=obj as NameValueCollection; 90 91 // Console.WriteLine(string.Format(printFormat, type, nv["Name"], nv["Age"], nv["IsVisible"])); 92 //} 93 //else if (type.Equals(typeof(DataRow))) 94 //{ 95 // var dr=obj as DataRow; 96 // Console.WriteLine(string.Format(printFormat, type, dr["Name"].ToString(), dr["Age"].ToString(), dr["IsVisible"].ToString())); 97 98 //} 99 //else if (typeof(IDataReader).IsAssignableFrom(type))100 //{101 // var rd=obj as IDataReader;102 // Console.WriteLine(string.Format(printFormat, type, rd["Name"].ToString(), rd["Age"].ToString(), rd["IsVisible"].ToString()));103 104 //}105 //else if (type.Equals(typeof(Dictionary )))106 //{107 // var dc=obj as Dictionary ;108 // Console.WriteLine(string.Format(printFormat, type, dc["Name"].ToString(), dc["Age"].ToString(), dc["IsVisible"].ToString()));109 //}110 //else if (type.Equals(typeof(Hashtable)))111 //{112 // var ht=obj as Hashtable;113 // Console.WriteLine(string.Format(printFormat, type, ht["Name"].ToString(), ht["Age"].ToString(), ht["IsVisible"].ToString()));114 115 //}116 }117 118 static void ShowList(object obj,string title="",bool showType=false)119 {120 Console.WriteLine(string.Format("----------------------------{0}------------------------",title));121 Type type=obj.GetType();122 if (type.Equals(typeof(DataTable)))123 {124 var tb=obj as DataTable;125 //for (int i=0; i ).MakeGenericType(typeof(object)).IsAssignableFrom(type))136 {137 var list=obj as IEnumerable