最近做项目,需要把DataTable中的数据强类型化.于是试用了下比较常用的AutoMapper,通过看代码中附带的Demo与网上的教程,也算能够勉强使用了,现将学习笔记记录如下:
namespace ConsoleApplication1 { class Program { static void Main( string[] args) { // 1.普通转换 Name name1 = new Name() { FirstName = " L ", LastName = " jz " }; Mapper.CreateMap<Name, NameDto>() .BeforeMap((name, nameDto) => Console.WriteLine( " hello world before ")) .AfterMap((name, nameDto) => Console.WriteLine( " hello world after ")); NameDto nameDto1 = Mapper.Map<Name, NameDto>(name1); Console.WriteLine( " 1 "); Console.WriteLine(nameDto1.FirstName + nameDto1.LastName); Console.WriteLine(); // Console.ReadKey(); // 整体设置 // 2.整体即时转换 Mapper.Reset(); Name name2 = new Name() { FirstName = " L ", LastName = " jz " }; Mapper.CreateMap<Name, NameDto>() .ConstructUsing(name => new NameDto() { AllName = name.FirstName + name.LastName }); NameDto nameDto2 = Mapper.Map<Name, NameDto>(name2); Console.WriteLine( " 2 "); Console.WriteLine(nameDto2.AllName); Console.WriteLine(); // Console.ReadKey(); // 3.整体通过TypeConverter类型转换 Mapper.Reset(); Name name3 = new Name() { FirstName = " L ", LastName = " jz " }; Mapper.CreateMap<Name, NameDto>() .ConvertUsing<NameConverter>(); NameDto nameDto3 = Mapper.Map<Name, NameDto>(name3); Console.WriteLine( " 3 "); Console.WriteLine(nameDto3.AllName); Console.WriteLine(); // Console.ReadKey(); // 单属性设置 // 4.属性条件转换 Mapper.Reset(); Name name4 = new Name() { FirstName = " L ", LastName = " jz " }; Mapper.CreateMap<Name, NameDto>() .ForMember(name => name.FirstName, opt => opt.Condition(name => !name.FirstName.Equals( " l ", StringComparison.OrdinalIgnoreCase))); NameDto nameDto4 = Mapper.Map<Name, NameDto>(name4); Console.WriteLine( " 4 "); Console.WriteLine( string.IsNullOrEmpty(nameDto4.FirstName)); Console.WriteLine(); // Console.ReadKey(); // 5.属性忽略 Mapper.Reset(); Name name5 = new Name() { FirstName = " L ", LastName = " jz " }; Mapper.CreateMap<Name, NameDto>() .ForMember(name => name.FirstName, opt => opt.Ignore()); NameDto nameDto5 = Mapper.Map<Name, NameDto>(name5); Console.WriteLine( " 5 "); Console.WriteLine( string.IsNullOrEmpty(nameDto5.FirstName)); Console.WriteLine(); // Console.ReadKey(); // 6.属性转换 Mapper.Reset(); Name name6 = new Name() { FirstName = " L ", LastName = " jz " }; Mapper.CreateMap<Name, NameDto>() .ForMember(name => name.AllName, opt => opt.MapFrom(name => name.FirstName + name.LastName)); NameDto nameDto6 = Mapper.Map<Name, NameDto>(name6); Console.WriteLine( " 6 "); Console.WriteLine(nameDto6.AllName); Console.WriteLine(); // Console.ReadKey(); // 7.属性通过ValueResolver转换 Mapper.Reset(); Name name7 = new Name() { FirstName = " L ", LastName = " jz " }; Mapper.CreateMap<Name, StoreDto>() .ForMember(storeDto => storeDto.Name, opt => opt.ResolveUsing<NameResolver>()); StoreDto store1 = Mapper.Map<Name, StoreDto>(name7); Console.WriteLine( " 7 "); Console.WriteLine(store1.Name.FirstName + store1.Name.LastName); Console.WriteLine(); // Console.ReadKey(); // 8.属性填充固定值 Mapper.Reset(); Name name8 = new Name() { FirstName = " L ", LastName = " jz " }; Mapper.CreateMap<Name, NameDto>() .ForMember(name => name.AllName, opt => opt.UseValue< string>( " ljzforever ")); NameDto nameDto8 = Mapper.Map<Name, NameDto>(name8); Console.WriteLine( " 8 "); Console.WriteLine(nameDto8.AllName); Console.WriteLine(); // Console.ReadKey(); // 9.属性格式化 Mapper.Reset(); Name name9 = new Name() { FirstName = " L ", LastName = " jz " }; Mapper.CreateMap<Name, NameDto>() .ForMember(name => name.FirstName, opt => opt.AddFormatter<StringFormatter>()); NameDto nameDto9 = Mapper.Map<Name, NameDto>(name9); Console.WriteLine( " 9 "); Console.WriteLine(nameDto9.FirstName); Console.WriteLine(); // Console.ReadKey(); // 10.属性null时的默认值 Mapper.Reset(); Name name10 = new Name() { FirstName = " L " }; Mapper.CreateMap<Name, NameDto>() .ForMember(name => name.LastName, opt => opt.NullSubstitute( " jz ")); NameDto nameDto10 = Mapper.Map<Name, NameDto>(name10); Console.WriteLine( " 10 "); Console.WriteLine(nameDto10.LastName); Console.WriteLine(); // Console.ReadKey(); // 其它设置与特性 // 11.转换匿名对象 Mapper.Reset(); object name11 = new { FirstName = " L ", LastName = " jz " }; NameDto nameDto11 = Mapper.DynamicMap<NameDto>(name11); Console.WriteLine( " 11 "); Console.WriteLine(nameDto11.FirstName + nameDto11.LastName); Console.WriteLine(); // Console.ReadKey(); // 12.转换DataTable Mapper.Reset(); DataTable dt = new DataTable(); dt.Columns.Add( " FirstName ", typeof( string)); dt.Columns.Add( " LastName ", typeof( string)); dt.Rows.Add( " L ", " jz "); List<NameDto> nameDto12 = Mapper.DynamicMap<IDataReader, List<NameDto>>(dt.CreateDataReader()); Console.WriteLine( " 12 "); Console.WriteLine(nameDto12[ 0].FirstName + nameDto12[ 0].LastName); Console.WriteLine(); // Console.ReadKey(); // emitMapper error // List<NameDto> nameDto20 = EmitMapper.ObjectMapperManager.DefaultInstance.GetMapper<IDataReader, List<NameDto>>().Map(dt.CreateDataReader()); // 13.转化存在的对象 Mapper.Reset(); Mapper.CreateMap<Name, NameDto>() .ForMember(name => name.LastName, opt => opt.Ignore()); Name name13 = new Name() { FirstName = " L " }; NameDto nameDto13 = new NameDto() { LastName = " jz " }; Mapper.Map<Name, NameDto>(name13, nameDto13); // nameDto13 = Mapper.Map<Name, NameDto>(name13); // 注意,必需使用上面的写法,不然nameDto13对象的LastName属性会被覆盖 Console.WriteLine( " 13 "); Console.WriteLine(nameDto13.FirstName + nameDto13.LastName); Console.WriteLine(); // Console.ReadKey(); // 14.Flatten特性 Mapper.Reset(); Mapper.CreateMap<Store, FlattenName>(); Store store2 = new Store() { Name = new Name() { FirstName = " L ", LastName = " jz " } }; FlattenName nameDto14 = Mapper.Map<Store, FlattenName>(store2); Console.WriteLine( " 14 "); Console.WriteLine(nameDto14.NameFirstname + nameDto14.NameLastName); Console.WriteLine(); // Console.ReadKey(); // 15.将Dictionary转化为对象,现在还不支持 Mapper.Reset(); Mapper.CreateMap<Dictionary< string, object>, Name>(); Dictionary< string, object> dict = new Dictionary< string, object>(); dict.Add( " FirstName ", " L "); // Name name15 = Mapper.DynamicMap<Dictionary<string, object>, Name>(dict); Name name15 = Mapper.Map<Dictionary< string, object>, Name>(dict); Console.WriteLine( " 15 "); Console.WriteLine(name15.FirstName); Console.WriteLine(); Console.ReadKey(); } } public class Store { public Name Name { get; set; } public int Age { get; set; } } public class Name { public string FirstName { get; set; } public string LastName { get; set; } } public class StoreDto { public NameDto Name { get; set; } public int Age { get; set; } } public class NameDto { public string FirstName { get; set; } public string LastName { get; set; } public string AllName { get; set; } } public class FlattenName { public string NameFirstname { get; set; } public string NameLastName { get; set; } } public class NameConverter : TypeConverter<Name, NameDto> { protected override NameDto ConvertCore(Name source) { return new NameDto() { AllName = source.FirstName + source.LastName }; } } public class NameResolver : ValueResolver<Name, NameDto> { protected override NameDto ResolveCore(Name source) { return new NameDto() { FirstName = source.FirstName, LastName = source.LastName }; } } public class NameFormatter : ValueFormatter<NameDto> { protected override string FormatValueCore(NameDto name) { return name.FirstName + name.LastName; } } public class StringFormatter : ValueFormatter< string> { protected override string FormatValueCore( string name) { return name + " - "; } } }
比较遗憾的是现在还不支持将Directory转化为对象
参考的文章:
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原文地址:http://www.cnblogs.com/ljzforever/archive/2011/12/29/2305500.html