我们可以使用微信的“生成带参数二维码接口”和 “用户管理接口”，来实现生成能标识不同推广渠道的二维码，记录分配给不同推广渠道二维码被扫描的信息。这样就可以统计和分析不同推广渠道的推广效果。
本系统使用最传统的三层架构。本文是微渠道的第一篇，主要介绍如下内容：
1. 数据库设计
2. 数据访问框架层及数据实体层
3. 数据访问层
4. 视图实体定义层
下面是详细实现步骤：
1. 数据库设计
微信用户信息表 WeixinUserInfo
推广渠道类型表 ChannelType
推广渠道表 Channel
扫描二维码记录表 ChannelScan
-- --------------------------------------------------
-- Creating all tables
-- --------------------------------------------------
-- Creating table 'Channel'
-- 推广渠道表
CREATE TABLE [Channel] (
--主键
[ID] int IDENTITY(1,1) NOT NULL,
--生成带参数二维码接口的场景值ID
--扫描二维码产生的事件中将包含该场景值ID
--以此识别不同推广渠道产生的扫描
[SceneId] int NOT NULL,
--所属渠道类型ID
[ChannelTypeId] int NOT NULL,
--渠道名称
[Name] nvarchar(4000) NOT NULL,
--分配给渠道的含场景值ID的二维码图片名称
[Qrcode] ntext NOT NULL
);
GO
-- Creating table 'ChannelType'
-- 推广渠道类型（渠道分组）表
CREATE TABLE [ChannelType] (
--主键
[ID] int IDENTITY(1,1) NOT NULL,
--渠道类型名称
[Name] nvarchar(4000) NOT NULL
);
GO
-- Creating table 'ChannelScan'
-- 推广渠道二维码扫描记录表
CREATE TABLE [ChannelScan] (
--主键
[ID] int IDENTITY(1,1) NOT NULL,
--扫描二维码的微信个人用户OpenId
[OpenId] nvarchar(4000) NOT NULL,
--扫描类型
[ScanType] smallint NOT NULL,
--所属渠道
[ChannelId] int NOT NULL,
--扫描时间
[ScanTime] datetime NOT NULL
);
GO
-- Creating table 'WeixinUserInfo'
-- 微信用户信息表
CREATE TABLE [WeixinUserInfo] (
--微信用户的OpenId
[OpenId] nvarchar(4000) NOT NULL,
--昵称
[NickName] nvarchar(4000) NOT NULL,
--用户的头像链接
[HeadImgUrl] nvarchar(4000) NOT NULL,
--用户的语言，简体中文为zh_CN
[Language] nvarchar(4000) NOT NULL,
--性别
[Sex] smallint NOT NULL,
--用户所在城市
[City] nvarchar(4000) NOT NULL,
--用户所在省份
[Province] nvarchar(4000) NOT NULL,
--用户所在国家
[Country] nvarchar(4000) NOT NULL,
--用户关注时间
[Subscribe_time] bigint NOT NULL,
--主键
[ID] int IDENTITY(1,1) NOT NULL
);
GO
-- --------------------------------------------------
-- Creating all PRIMARY KEY constraints
-- --------------------------------------------------
-- Creating primary key on [ID] in table 'Channel'
ALTER TABLE [Channel]
ADD CONSTRAINT [PK_Channel]
PRIMARY KEY ([ID] );
GO
-- Creating primary key on [ID] in table 'ChannelType'
ALTER TABLE [ChannelType]
ADD CONSTRAINT [PK_ChannelType]
PRIMARY KEY ([ID] );
GO
-- Creating primary key on [ID] in table 'ChannelScan'
ALTER TABLE [ChannelScan]
ADD CONSTRAINT [PK_ChannelScan]
PRIMARY KEY ([ID] );
GO
-- Creating primary key on [ID] in table 'WeixinUserInfo'
ALTER TABLE [WeixinUserInfo]
ADD CONSTRAINT [PK_WeixinUserInfo]
PRIMARY KEY ([ID] );
GO
-- --------------------------------------------------
-- Creating all FOREIGN KEY constraints
-- --------------------------------------------------
-- --------------------------------------------------
-- Script has ended
-- --------------------------------------------------
2. 数据访问框架层及数据实体定义层 （ORM ）
使用Entity Framework来实现DAL层与数据库交互的数据传输，EF已包含与数据库一致的数据实体。
添加一个ADO.NET Entity Data Model的item，连接到刚才建立的数据库,我这里用的是EF 6
添加完成后如下图：
3. 数据访问层（DAL）
通过调用ORM，实现数据持久化。
1) 添加一个增删改查的一个通用基类GenericRepository：
using System;
using System.Collections.Generic;
using System.Data.Entity;
using System.Data.Entity.Validation;
using System.Linq;
using System.Linq.Expressions;
using System.Web;
public class GenericRepository<TContext, TEntity> : IDisposable
where TContext : DbContext, new()
where TEntity : class
{
protected TContext _context;
protected readonly IDbSet<TEntity> _set;
public GenericRepository()
{
_context = new TContext();
_set = _context.Set<TEntity>();
}
protected TContext Context
{
get
{
return _context;
}
}
protected IDbSet<TEntity> DbSet
{
get
{
return _set == null ? _context.Set<TEntity>() : _set;
}
}
public IQueryable<TEntity> GetAll()
{
return DbSet.AsQueryable();
}
/// <summary>
/// 分页查询
/// </summary>
/// <typeparam name="TEntity"></typeparam>
/// <param name="funWheres">条件表达式u => u.OpenId == userInfo.OpenId</param>
/// <param name="sortExpress">排序属性名称</param>
/// <param name="isSortAsc">是否升序</param>
/// <param name="pageSize">每页大小</param>
/// <param name="pageIndex">当前页码,以0开始</param>
/// <param name="totalCount">返回查询总数量</param>
/// <returns></returns>
public IQueryable<TEntity> GetPaged(ref int totalCount, List<Expression<Func<TEntity, bool>>> funWheres, string sortPropertyName = "", bool isSortAsc = true, int pageIndex = 0, int pageSize = 20)
{
IQueryable<TEntity> query = DbSet;
foreach (var funWhere in funWheres)
{
query = query.Where(funWhere);
}
query = query.Distinct();
totalCount = query.Count();
//order
if (!string.IsNullOrEmpty(sortPropertyName))
{
query = query.OrderBy(sortPropertyName, isSortAsc);
query = query.Skip(pageSize * pageIndex);
}
query = query.Take(pageSize);
return query;
}
/// <summary>
///
/// </summary>
/// <param name="predicate">条件表达式 u => u.OpenId == userInfo.OpenId</param>
/// <returns></returns>
public IQueryable<TEntity> GetByPredicate(Expression<Func<TEntity, bool>> predicate)
{
return DbSet.Where(predicate).AsQueryable<TEntity>();
}
/// <summary>
///
/// </summary>
/// <param name="predicate">条件表达式 u => u.OpenId == userInfo.OpenId</param>
/// <returns></returns>
public bool Contains(Expression<Func<TEntity, bool>> predicate)
{
return DbSet.Count(predicate) > 0; ;
}
/// <summary>
///
/// </summary>
/// <param name="keys">可用于联合主健 1, "Michael"</param>
/// <returns></returns>
public TEntity GetSingleByKeys(params object[] keys)
{
return DbSet.Find(keys);
}
/// <summary>
///
/// </summary>
/// <param name="predicate">条件表达式 u => u.OpenId == userInfo.OpenId</param>
/// <returns></returns>
public TEntity GetSingleByPredicate(Expression<Func<TEntity, bool>> predicate)
{
return DbSet.FirstOrDefault(predicate);
}
public bool Insert(TEntity t)
{
var entity = DbSet.Add(t);
return Save() > 0;
}
public TEntity InsertAndReturn(TEntity t)
{
var ent = DbSet.Add(t);
Save();
return ent;
}
public bool Delete(TEntity t)
{
if (Context.Entry(t).State == EntityState.Detached)
{
DbSet.Attach(t);
}
DbSet.Remove(t);
return Save() > 0;
}
public bool Delete(Expression<Func<TEntity, bool>> predicate)
{
var toDelete = GetByPredicate(predicate);
foreach (var obj in toDelete)
{
DbSet.Remove(obj);
}
return Save() > 0;
}
public bool Update(TEntity t)
{
var entry = Context.Entry(t);
DbSet.Attach(t);
entry.State = EntityState.Modified;
return Save() > 0;
}
public int Save()
{
return Context.SaveChanges();
}
public int Count
{
get { return DbSet.Count(); }
}
public IQueryable<TEntity> GetWithRawSql(string query, params object[] parameters)
{
return Context.Database.SqlQuery<TEntity>(query, parameters).AsQueryable();
}
public void Dispose()
{
if (Context != null)
Context.Dispose();
GC.SuppressFinalize(this);
}
}
public static class MyExtend
{
public static IQueryable<T> OrderBy<T>(this IQueryable<T> queryable, string propertyName, bool isSortAsc)
{
Expression param = Expression.Parameter(typeof(T));
var properties = propertyName.Split('.');
var body = param;
//支持"User.Age"这种参数 p=>p.User.Age
foreach (var p in properties)
{
body = Expression.Property(body, p);
}
dynamic keySelector = Expression.Lambda(body, param as ParameterExpression);
return isSortAsc ? Queryable.OrderBy(queryable, keySelector) : Queryable.OrderByDescending(queryable, keySelector);
}
}
2） 添加一个Text Template的item, 并写入下面的内容：
<#@ template language="C#" debug="false" hostspecific="true"#>
<#@ include file="EF6.Utility.CS.ttinclude"#><#@
output extension=".cs"#><#
const string inputFile = @"..\ORM\Channel.edmx";
var usingEntity = "using ChannelSystem.ORM;";
var className = "Dal";
var textTransform = DynamicTextTransformation.Create(this);
var code = new CodeGenerationTools(this);
var ef = new MetadataTools(this);
var typeMapper = new TypeMapper(code, ef, textTransform.Errors);
var fileManager = EntityFrameworkTemplateFileManager.Create(this);
var itemCollection = new EdmMetadataLoader(textTransform.Host, textTransform.Errors).CreateEdmItemCollection(inputFile);
var codeStringGenerator = new CodeStringGenerator(code, typeMapper, ef);
var container = itemCollection.OfType<EntityContainer>().FirstOrDefault();
if (container == null)
{
return string.Empty;
}
if (!typeMapper.VerifyCaseInsensitiveTypeUniqueness(typeMapper.GetAllGlobalItems(itemCollection), inputFile))
{
return string.Empty;
}
WriteHeader(codeStringGenerator, fileManager);
foreach (var entity in typeMapper.GetItemsToGenerate<EntityType>(itemCollection))
{
fileManager.StartNewFile(entity.Name + className + ".cs");
BeginNamespace(code);
#>
<#=usingEntity#>
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
<#=codeStringGenerator.EntityClassOpening(entity)#><#=className#>: GenericRepository<<#=code.Escape(container)#>,<#=entity.Name #>>
{
}
<#
EndNamespace(code);
}
foreach (var complex in typeMapper.GetItemsToGenerate<ComplexType>(itemCollection))
{
fileManager.StartNewFile(complex.Name + ".cs");
BeginNamespace(code);
#>
<#=codeStringGenerator.UsingDirectives(inHeader: false, includeCollections: false)#>
<#=Accessibility.ForType(complex)#> partial class <#=code.Escape(complex)#>
{
<#
var complexProperties = typeMapper.GetComplexProperties(complex);
var propertiesWithDefaultValues = typeMapper.GetPropertiesWithDefaultValues(complex);
if (propertiesWithDefaultValues.Any() || complexProperties.Any())
{
#>
public <#=code.Escape(complex)#>()
{
<#
foreach (var edmProperty in propertiesWithDefaultValues)
{
#>
this.<#=code.Escape(edmProperty)#> = <#=typeMapper.CreateLiteral(edmProperty.DefaultValue)#>;
<#
}
foreach (var complexProperty in complexProperties)
{
#>
this.<#=code.Escape(complexProperty)#> = new <#=typeMapper.GetTypeName(complexProperty.TypeUsage)#>();
<#
}
#>
}
<#
}
var simpleProperties = typeMapper.GetSimpleProperties(complex);
if (simpleProperties.Any())
{
foreach(var edmProperty in simpleProperties)
{
#>
<#=codeStringGenerator.Property(edmProperty)#>
<#
}
}
if (complexProperties.Any())
{
#>
<#
foreach(var edmProperty in complexProperties)
{
#>
<#=codeStringGenerator.Property(edmProperty)#>
<#
}
}
#>
}
<#
EndNamespace(code);
}
foreach (var enumType in typeMapper.GetEnumItemsToGenerate(itemCollection))
{
fileManager.StartNewFile(enumType.Name + ".cs");
BeginNamespace(code);
#>
<#=codeStringGenerator.UsingDirectives(inHeader: false, includeCollections: false)#>
<#
if (typeMapper.EnumIsFlags(enumType))
{
#>
[Flags]
<#
}
#>
<#=codeStringGenerator.EnumOpening(enumType)#>
{
<#
var foundOne = false;
foreach (MetadataItem member in typeMapper.GetEnumMembers(enumType))
{
foundOne = true;
#>
<#=code.Escape(typeMapper.GetEnumMemberName(member))#> = <#=typeMapper.GetEnumMemberValue(member)#>,
<#
}
if (foundOne)
{
this.GenerationEnvironment.Remove(this.GenerationEnvironment.Length - 3, 1);
}
#>
}
<#
EndNamespace(code);
}
fileManager.Process();
#>
<#+
public void WriteHeader(CodeStringGenerator codeStringGenerator, EntityFrameworkTemplateFileManager fileManager)
{
fileManager.StartHeader();
#>
//------------------------------------------------------------------------------
// <auto-generated>
// <#=CodeGenerationTools.GetResourceString("Template_GeneratedCodeCommentLine1")#>
//
// <#=CodeGenerationTools.GetResourceString("Template_GeneratedCodeCommentLine2")#>
// <#=CodeGenerationTools.GetResourceString("Template_GeneratedCodeCommentLine3")#>
// </auto-generated>
//------------------------------------------------------------------------------
<#=codeStringGenerator.UsingDirectives(inHeader: true)#>
<#+
fileManager.EndBlock();
}
public void BeginNamespace(CodeGenerationTools code)
{
var codeNamespace = code.VsNamespaceSuggestion();
if (!String.IsNullOrEmpty(codeNamespace))
{
#>
namespace <#=code.EscapeNamespace(codeNamespace)#>
{
<#+
PushIndent(" ");
}
}
public void EndNamespace(CodeGenerationTools code)
{
if (!String.IsNullOrEmpty(code.VsNamespaceSuggestion()))
{
PopIndent();
#>
}
<#+
}
}
public const string TemplateId = "CSharp_DbContext_Types_EF6";
public class CodeStringGenerator
{
private readonly CodeGenerationTools _code;
private readonly TypeMapper _typeMapper;
private readonly MetadataTools _ef;
public CodeStringGenerator(CodeGenerationTools code, TypeMapper typeMapper, MetadataTools ef)
{
ArgumentNotNull(code, "code");
ArgumentNotNull(typeMapper, "typeMapper");
ArgumentNotNull(ef, "ef");
_code = code;
_typeMapper = typeMapper;
_ef = ef;
}
public string Property(EdmProperty edmProperty)
{
return string.Format(
CultureInfo.InvariantCulture,
"{0} {1} {2} {{ {3}get; {4}set; }}",
Accessibility.ForProperty(edmProperty),
_typeMapper.GetTypeName(edmProperty.TypeUsage),
_code.Escape(edmProperty),
_code.SpaceAfter(Accessibility.ForGetter(edmProperty)),
_code.SpaceAfter(Accessibility.ForSetter(edmProperty)));
}
public string NavigationProperty(NavigationProperty navProp)
{
var endType = _typeMapper.GetTypeName(navProp.ToEndMember.GetEntityType());
return string.Format(
CultureInfo.InvariantCulture,
"{0} {1} {2} {{ {3}get; {4}set; }}",
AccessibilityAndVirtual(Accessibility.ForNavigationProperty(navProp)),
navProp.ToEndMember.RelationshipMultiplicity == RelationshipMultiplicity.Many ? ("ICollection<" + endType + ">") : endType,
_code.Escape(navProp),
_code.SpaceAfter(Accessibility.ForGetter(navProp)),
_code.SpaceAfter(Accessibility.ForSetter(navProp)));
}
public string AccessibilityAndVirtual(string accessibility)
{
return accessibility + (accessibility != "private" ? " virtual" : "");
}
public string EntityClassOpening(EntityType entity)
{
return string.Format(
CultureInfo.InvariantCulture,
"{0} {1}partial class {2}{3}",
Accessibility.ForType(entity),
_code.SpaceAfter(_code.AbstractOption(entity)),
_code.Escape(entity),
_code.StringBefore(" : ", _typeMapper.GetTypeName(entity.BaseType)));
}
public string EnumOpening(SimpleType enumType)
{
return string.Format(
CultureInfo.InvariantCulture,
"{0} enum {1} : {2}",
Accessibility.ForType(enumType),
_code.Escape(enumType),
_code.Escape(_typeMapper.UnderlyingClrType(enumType)));
}
public void WriteFunctionParameters(EdmFunction edmFunction, Action<string, string, string, string> writeParameter)
{
var parameters = FunctionImportParameter.Create(edmFunction.Parameters, _code, _ef);
foreach (var parameter in parameters.Where(p => p.NeedsLocalVariable))
{
var isNotNull = parameter.IsNullableOfT ? parameter.FunctionParameterName + ".HasValue" : parameter.FunctionParameterName + " != null";
var notNullInit = "new ObjectParameter(\"" + parameter.EsqlParameterName + "\", " + parameter.FunctionParameterName + ")";
var nullInit = "new ObjectParameter(\"" + parameter.EsqlParameterName + "\", typeof(" + TypeMapper.FixNamespaces(parameter.RawClrTypeName) + "))";
writeParameter(parameter.LocalVariableName, isNotNull, notNullInit, nullInit);
}
}
public string ComposableFunctionMethod(EdmFunction edmFunction, string modelNamespace)
{
var parameters = _typeMapper.GetParameters(edmFunction);
return string.Format(
CultureInfo.InvariantCulture,
"{0} IQueryable<{1}> {2}({3})",
AccessibilityAndVirtual(Accessibility.ForMethod(edmFunction)),
_typeMapper.GetTypeName(_typeMapper.GetReturnType(edmFunction), modelNamespace),
_code.Escape(edmFunction),
string.Join(", ", parameters.Select(p => TypeMapper.FixNamespaces(p.FunctionParameterType) + " " + p.FunctionParameterName).ToArray()));
}
public string ComposableCreateQuery(EdmFunction edmFunction, string modelNamespace)
{
var parameters = _typeMapper.GetParameters(edmFunction);
return string.Format(
CultureInfo.InvariantCulture,
"return ((IObjectContextAdapter)this).ObjectContext.CreateQuery<{0}>(\"[{1}].[{2}]({3})\"{4});",
_typeMapper.GetTypeName(_typeMapper.GetReturnType(edmFunction), modelNamespace),
edmFunction.NamespaceName,
edmFunction.Name,
string.Join(", ", parameters.Select(p => "@" + p.EsqlParameterName).ToArray()),
_code.StringBefore(", ", string.Join(", ", parameters.Select(p => p.ExecuteParameterName).ToArray())));
}
public string FunctionMethod(EdmFunction edmFunction, string modelNamespace, bool includeMergeOption)
{
var parameters = _typeMapper.GetParameters(edmFunction);
var returnType = _typeMapper.GetReturnType(edmFunction);
var paramList = String.Join(", ", parameters.Select(p => TypeMapper.FixNamespaces(p.FunctionParameterType) + " " + p.FunctionParameterName).ToArray());
if (includeMergeOption)
{
paramList = _code.StringAfter(paramList, ", ") + "MergeOption mergeOption";
}
return string.Format(
CultureInfo.InvariantCulture,
"{0} {1} {2}({3})",
AccessibilityAndVirtual(Accessibility.ForMethod(edmFunction)),
returnType == null ? "int" : "ObjectResult<" + _typeMapper.GetTypeName(returnType, modelNamespace) + ">",
_code.Escape(edmFunction),
paramList);
}
public string ExecuteFunction(EdmFunction edmFunction, string modelNamespace, bool includeMergeOption)
{
var parameters = _typeMapper.GetParameters(edmFunction);
var returnType = _typeMapper.GetReturnType(edmFunction);
var callParams = _code.StringBefore(", ", String.Join(", ", parameters.Select(p => p.ExecuteParameterName).ToArray()));
if (includeMergeOption)
{
callParams = ", mergeOption" + callParams;
}
return string.Format(
CultureInfo.InvariantCulture,
"return ((IObjectContextAdapter)this).ObjectContext.ExecuteFunction{0}(\"{1}\"{2});",
returnType == null ? "" : "<" + _typeMapper.GetTypeName(returnType, modelNamespace) + ">",
edmFunction.Name,
callParams);
}
public string DbSet(EntitySet entitySet)
{
return string.Format(
CultureInfo.InvariantCulture,
"{0} virtual DbSet<{1}> {2} {{ get; set; }}",
Accessibility.ForReadOnlyProperty(entitySet),
_typeMapper.GetTypeName(entitySet.ElementType),
_code.Escape(entitySet));
}
public string UsingDirectives(bool inHeader, bool includeCollections = true)
{
return inHeader == string.IsNullOrEmpty(_code.VsNamespaceSuggestion())
? string.Format(
CultureInfo.InvariantCulture,
"{0}using System;{3}using System.Runtime.Serialization;{1}" +
"{2}",
inHeader ? Environment.NewLine : "",
includeCollections ? (Environment.NewLine + "using System.Collections.Generic;") : "",
inHeader ? "" : Environment.NewLine, Environment.NewLine)
: "";
}
public string WriteEntityTypeSerializationInfo(EntityType type)
{
StringBuilder output = new StringBuilder();
output.AppendLine("[DataContract(IsReference = true)]");
List<String> typeList = new List<String>();
var complexProperties = _typeMapper.GetComplexProperties(type);
foreach(var complexProperty in complexProperties)
{
typeList.Add(_code.Escape(complexProperty));
}
var navigationProperties = _typeMapper.GetNavigationProperties(type);
foreach (var navigationProperty in navigationProperties)
{
typeList.Add(_code.Escape(_typeMapper.GetTypeName(navigationProperty.ToEndMember.GetEntityType())));
}
foreach(String sItem in typeList.Distinct())
{
output.AppendFormat("[KnownType(typeof({0}))]{1}", sItem, Environment.NewLine);
}
return output.ToString();
}
}
public class TypeMapper
{
private const string ExternalTypeNameAttributeName = @"http://schemas.microsoft.com/ado/2006/04/codegeneration:ExternalTypeName";
private readonly System.Collections.IList _errors;
private readonly CodeGenerationTools _code;
private readonly MetadataTools _ef;
public TypeMapper(CodeGenerationTools code, MetadataTools ef, System.Collections.IList errors)
{
ArgumentNotNull(code, "code");
ArgumentNotNull(ef, "ef");
ArgumentNotNull(errors, "errors");
_code = code;
_ef = ef;
_errors = errors;
}
public static string FixNamespaces(string typeName)
{
return typeName.Replace("System.Data.Spatial.", "System.Data.Entity.Spatial.");
}
public string GetTypeName(TypeUsage typeUsage)
{
return typeUsage == null ? null : GetTypeName(typeUsage.EdmType, _ef.IsNullable(typeUsage), modelNamespace: null);
}
public string GetTypeName(EdmType edmType)
{
return GetTypeName(edmType, isNullable: null, modelNamespace: null);
}
public string GetTypeName(TypeUsage typeUsage, string modelNamespace)
{
return typeUsage == null ? null : GetTypeName(typeUsage.EdmType, _ef.IsNullable(typeUsage), modelNamespace);
}
public string GetTypeName(EdmType edmType, string modelNamespace)
{
return GetTypeName(edmType, isNullable: null, modelNamespace: modelNamespace);
}
public string GetTypeName(EdmType edmType, bool? isNullable, string modelNamespace)
{
if (edmType == null)
{
return null;
}
var collectionType = edmType as CollectionType;
if (collectionType != null)
{
return String.Format(CultureInfo.InvariantCulture, "ICollection<{0}>", GetTypeName(collectionType.TypeUsage, modelNamespace));
}
var typeName = _code.Escape(edmType.MetadataProperties
.Where(p => p.Name == ExternalTypeNameAttributeName)
.Select(p => (string)p.Value)
.FirstOrDefault())
?? (modelNamespace != null && edmType.NamespaceName != modelNamespace ?
_code.CreateFullName(_code.EscapeNamespace(edmType.NamespaceName), _code.Escape(edmType)) :
_code.Escape(edmType));
if (edmType is StructuralType)
{
return typeName;
}
if (edmType is SimpleType)
{
var clrType = UnderlyingClrType(edmType);
if (!IsEnumType(edmType))
{
typeName = _code.Escape(clrType);
}
typeName = FixNamespaces(typeName);
return clrType.IsValueType && isNullable == true ?
String.Format(CultureInfo.InvariantCulture, "Nullable<{0}>", typeName) :
typeName;
}
throw new ArgumentException("edmType");
}
public Type UnderlyingClrType(EdmType edmType)
{
ArgumentNotNull(edmType, "edmType");
var primitiveType = edmType as PrimitiveType;
if (primitiveType != null)
{
return primitiveType.ClrEquivalentType;
}
if (IsEnumType(edmType))
{
return GetEnumUnderlyingType(edmType).ClrEquivalentType;
}
return typeof(object);
}
public object GetEnumMemberValue(MetadataItem enumMember)
{
ArgumentNotNull(enumMember, "enumMember");
var valueProperty = enumMember.GetType().GetProperty("Value");
return valueProperty == null ? null : valueProperty.GetValue(enumMember, null);
}
public string GetEnumMemberName(MetadataItem enumMember)
{
ArgumentNotNull(enumMember, "enumMember");
var nameProperty = enumMember.GetType().GetProperty("Name");
return nameProperty == null ? null : (string)nameProperty.GetValue(enumMember, null);
}
public System.Collections.IEnumerable GetEnumMembers(EdmType enumType)
{
ArgumentNotNull(enumType, "enumType");
var membersProperty = enumType.GetType().GetProperty("Members");
return membersProperty != null
? (System.Collections.IEnumerable)membersProperty.GetValue(enumType, null)
: Enumerable.Empty<MetadataItem>();
}
public bool EnumIsFlags(EdmType enumType)
{
ArgumentNotNull(enumType, "enumType");
var isFlagsProperty = enumType.GetType().GetProperty("IsFlags");
return isFlagsProperty != null && (bool)isFlagsProperty.GetValue(enumType, null);
}
public bool IsEnumType(GlobalItem edmType)
{
ArgumentNotNull(edmType, "edmType");
return edmType.GetType().Name == "EnumType";
}
public PrimitiveType GetEnumUnderlyingType(EdmType enumType)
{
ArgumentNotNull(enumType, "enumType");
return (PrimitiveType)enumType.GetType().GetProperty("UnderlyingType").GetValue(enumType, null);
}
public string CreateLiteral(object value)
{
if (value == null || value.GetType() != typeof(TimeSpan))
{
return _code.CreateLiteral(value);
}
return string.Format(CultureInfo.InvariantCulture, "new TimeSpan({0})", ((TimeSpan)value).Ticks);
}
public bool VerifyCaseInsensitiveTypeUniqueness(IEnumerable<string> types, string sourceFile)
{
ArgumentNotNull(types, "types");
ArgumentNotNull(sourceFile, "sourceFile");
var hash = new HashSet<string>(StringComparer.InvariantCultureIgnoreCase);
if (types.Any(item => !hash.Add(item)))
{
_errors.Add(
new CompilerError(sourceFile, -1, -1, "6023",
String.Format(CultureInfo.CurrentCulture, CodeGenerationTools.GetResourceString("Template_CaseInsensitiveTypeConflict"))));
return false;
}
return true;
}
public IEnumerable<SimpleType> GetEnumItemsToGenerate(IEnumerable<GlobalItem> itemCollection)
{
return GetItemsToGenerate<SimpleType>(itemCollection)
.Where(e => IsEnumType(e));
}
public IEnumerable<T> GetItemsToGenerate<T>(IEnumerable<GlobalItem> itemCollection) where T: EdmType
{
return itemCollection
.OfType<T>()
.Where(i => !i.MetadataProperties.Any(p => p.Name == ExternalTypeNameAttributeName))
.OrderBy(i => i.Name);
}
public IEnumerable<string> GetAllGlobalItems(IEnumerable<GlobalItem> itemCollection)
{
return itemCollection
.Where(i => i is EntityType || i is ComplexType || i is EntityContainer || IsEnumType(i))
.Select(g => GetGlobalItemName(g));
}
public string GetGlobalItemName(GlobalItem item)
{
if (item is EdmType)
{
return ((EdmType)item).Name;
}
else
{
return ((EntityContainer)item).Name;
}
}
public IEnumerable<EdmProperty> GetSimpleProperties(EntityType type)
{
return type.Properties.Where(p => p.TypeUsage.EdmType is SimpleType && p.DeclaringType == type);
}
public IEnumerable<EdmProperty> GetSimpleProperties(ComplexType type)
{
return type.Properties.Where(p => p.TypeUsage.EdmType is SimpleType && p.DeclaringType == type);
}
public IEnumerable<EdmProperty> GetComplexProperties(EntityType type)
{
return type.Properties.Where(p => p.TypeUsage.EdmType is ComplexType && p.DeclaringType == type);
}
public IEnumerable<EdmProperty> GetComplexProperties(ComplexType type)
{
return type.Properties.Where(p => p.TypeUsage.EdmType is ComplexType && p.DeclaringType == type);
}
public IEnumerable<EdmProperty> GetPropertiesWithDefaultValues(EntityType type)
{
return type.Properties.Where(p => p.TypeUsage.EdmType is SimpleType && p.DeclaringType == type && p.DefaultValue != null);
}
public IEnumerable<EdmProperty> GetPropertiesWithDefaultValues(ComplexType type)
{
return type.Properties.Where(p => p.TypeUsage.EdmType is SimpleType && p.DeclaringType == type && p.DefaultValue != null);
}
public IEnumerable<NavigationProperty> GetNavigationProperties(EntityType type)
{
return type.NavigationProperties.Where(np => np.DeclaringType == type);
}
public IEnumerable<NavigationProperty> GetCollectionNavigationProperties(EntityType type)
{
return type.NavigationProperties.Where(np => np.DeclaringType == type && np.ToEndMember.RelationshipMultiplicity == RelationshipMultiplicity.Many);
}
public FunctionParameter GetReturnParameter(EdmFunction edmFunction)
{
ArgumentNotNull(edmFunction, "edmFunction");
var returnParamsProperty = edmFunction.GetType().GetProperty("ReturnParameters");
return returnParamsProperty == null
? edmFunction.ReturnParameter
: ((IEnumerable<FunctionParameter>)returnParamsProperty.GetValue(edmFunction, null)).FirstOrDefault();
}
public bool IsComposable(EdmFunction edmFunction)
{
ArgumentNotNull(edmFunction, "edmFunction");
var isComposableProperty = edmFunction.GetType().GetProperty("IsComposableAttribute");
return isComposableProperty != null && (bool)isComposableProperty.GetValue(edmFunction, null);
}
public IEnumerable<FunctionImportParameter> GetParameters(EdmFunction edmFunction)
{
return FunctionImportParameter.Create(edmFunction.Parameters, _code, _ef);
}
public TypeUsage GetReturnType(EdmFunction edmFunction)
{
var returnParam = GetReturnParameter(edmFunction);
return returnParam == null ? null : _ef.GetElementType(returnParam.TypeUsage);
}
public bool GenerateMergeOptionFunction(EdmFunction edmFunction, bool includeMergeOption)
{
var returnType = GetReturnType(edmFunction);
return !includeMergeOption && returnType != null && returnType.EdmType.BuiltInTypeKind == BuiltInTypeKind.EntityType;
}
}
public static void ArgumentNotNull<T>(T arg, string name) where T : class
{
if (arg == null)
{
throw new ArgumentNullException(name);
}
}
#>
这里要注意的是这二行：
const string inputFile = @"..\ORM\Channel.edmx";
var usingEntity = "using ChannelSystem.ORM;";
第一行是上面建的ORM， 第二行是ORM里的namespace.
指定正确path的edmax后，会自动生成各个继承基类GenericRepository的DAL类，比如ChanelDal：
public partial class ChannelDal: GenericRepository<ChannelEntities,Channel>
{
}
最后DAL结构如下：
4. 视图实体定义层（ViewEntities）
主要用于用户界面交互的数据实体，以及数据实体与视图实体的转换方法，实现数据库与用户界面交互的隔离。
1) 定义一个接口IViewModel，来规定数据实体与视图实体的转换方法：
/// <summary>
/// 数据实体与视图实体的转换
/// </summary>
/// <typeparam name="TV">数据实体对应的视图实体类型</typeparam>
/// <typeparam name="TD">数据实体类型</typeparam>
public interface IViewModel<TV, TD>
{
/// <summary>
/// 数据实体转换为视图实体
/// </summary>
/// <param name="entity">数据实体</param>
/// <returns>视图实体</returns>
TV GetViewModel(TD entity);
/// <summary>
/// 视图实体转换为数据实体
/// </summary>
/// <param name="entity">视图实体</param>
/// <returns>数据实体</returns>
TD GetDataEntity(TV entity);
}
}
2）定义枚举类型Enum：
/// <summary>
/// 渠道扫描类型
/// </summary>
public enum ScanType
{
/// <summary>
/// 关注
/// </summary>
Subscribe = 1,
/// <summary>
/// 已关注后扫描
/// </summary>
Scan
}
/// <summary>
/// 性别
/// </summary>
public enum Sex
{
/// <summary>
/// 未知
/// </summary>
UnKnown,
/// <summary>
/// 男
/// </summary>
Male,
/// <summary>
/// 女
/// </summary>
Female
}
3） 定义每个数据实体对应的视图实体，并实现IViewModel接口的转换方法：
实体数据的转换这里使用了开源的Object-Object Mapping工具AutoMapper
- ChannelEntity:
/// <summary>
/// 渠道
/// </summary>
[Serializable]
public class ChannelEntity : IViewModel<ChannelEntity, Channel>
{
static ChannelEntity()
{
AutoMapper.Mapper.CreateMap<Channel, ChannelEntity>();
AutoMapper.Mapper.CreateMap<ChannelEntity, Channel>();
}
/// <summary>
/// ID
/// </summary>
[Key]
public int ID { get; set; }
/// <summary>
/// 场景值ID，临时二维码时为32位非0整型，永久二维码时最大值为100000（目前参数只支持1--100000）
/// </summary>
public int SceneId { get; set; }
/// <summary>
/// 渠道名称
/// </summary>
public string Name { get; set; }
/// <summary>
/// 所属渠道类型ID
/// </summary>
public int ChannelTypeId { get; set; }
/// <summary>
/// 渠道二维码
/// </summary>
public string Qrcode { get; set; }
public ChannelEntity GetViewModel(Channel entity)
{
return AutoMapper.Mapper.Map<Channel, ChannelEntity>(entity);
}
public Channel GetDataEntity(ChannelEntity entity)
{
return AutoMapper.Mapper.Map<ChannelEntity, Channel>(entity);
}
}
- WeixinUserInfoEntity:
/// <summary>
/// 微信用户信息
/// </summary>
[Serializable]
public class WeixinUserInfoEntity : IViewModel<WeixinUserInfoEntity, WeixinUserInfo>
{
static WeixinUserInfoEntity()
{
var map = AutoMapper.Mapper.CreateMap<WeixinUserInfo, WeixinUserInfoEntity>();
map.ForMember(e => e.Sex, d => d.MapFrom(n => (Sex)n.Sex));
var m1 = AutoMapper.Mapper.CreateMap<WeixinUserInfoEntity, WeixinUserInfo>();
m1.ForMember(e => e.Sex, d => d.MapFrom(n => (short)n.Sex));
}
/// <summary>
/// ID
/// </summary>
[Key]
public int ID { get; set; }
/// <summary>
/// 微信用户的OpenId
/// </summary>
public string OpenId { get; set; }
/// <summary>
/// 昵称
/// </summary>
public string NickName { get; set; }
/// <summary>
/// 普通用户的头像链接
/// </summary>
public string HeadImgUrl { get; set; }
/// <summary>
/// 普通用户的语言，简体中文为zh_CN
/// </summary>
public string Language { get; set; }
/// <summary>
/// 性别
/// </summary>
public Sex Sex { get; set; }
/// <summary>
/// 用户所在城市
/// </summary>
public string City { get; set; }
/// <summary>
/// 用户所在省份
/// </summary>
public string Province { get; set; }
/// <summary>
/// 用户所在国家
/// </summary>
public string Country { get; set; }
/// <summary>
/// 微信服务器保存的用户关注时间，为时间戳。如果用户曾多次关注，则取最后关注时间
/// </summary>
public long Subscribe_time { get; set; }
/// <summary>
/// 项目中实际使用的用户关注时间
/// </summary>
public DateTime SubscribeTime
{
get
{
//微信服务器保存的用户关注时间时间戳，为从1970年1月1日0时起到用户关注时所经过的毫秒数
//需要进行计算才能正确转换为C#中DateTime类型的时间
DateTime dtStart = TimeZone.CurrentTimeZone.ToLocalTime(new DateTime(1970, 1, 1));
long lTime = long.Parse(Subscribe_time + "0000000");
TimeSpan toNow = new TimeSpan(lTime);
DateTime dtResult = dtStart.Add(toNow);
return dtResult;
}
}
public WeixinUserInfoEntity GetViewModel(WeixinUserInfo entity)
{
return AutoMapper.Mapper.Map<WeixinUserInfo, WeixinUserInfoEntity>(entity);
}
public WeixinUserInfo GetDataEntity(WeixinUserInfoEntity entity)
{
return AutoMapper.Mapper.Map<WeixinUserInfoEntity, WeixinUserInfo>(entity);
}
}
这里要把Sex转换一下：
var map = AutoMapper.Mapper.CreateMap<WeixinUserInfo, WeixinUserInfoEntity>();
map.ForMember(e => e.Sex, d => d.MapFrom(n => (Sex)n.Sex));var m1 = AutoMapper.Mapper.CreateMap<WeixinUserInfoEntity, WeixinUserInfo>();
m1.ForMember(e => e.Sex, d => d.MapFrom(n => (short)n.Sex));
另外，这里要把用户关注时间处理一下：
/// <summary>
/// 微信服务器保存的用户关注时间，为时间戳。如果用户曾多次关注，则取最后关注时间/// </summary>
public long Subscribe_time { get; set; }
/// <summary>
/// 项目中实际使用的用户关注时间
/// </summary>
public DateTime SubscribeTime
{
get
{
//微信服务器保存的用户关注时间时间戳，为从1970年1月1日0时起到用户关注时所经过的毫秒数
//需要进行计算才能正确转换为C#中DateTime类型的时间
DateTime dtStart = TimeZone.CurrentTimeZone.ToLocalTime(new DateTime(1970, 1, 1));
long lTime = long.Parse(Subscribe_time + "0000000");
TimeSpan toNow = new TimeSpan(lTime);
DateTime dtResult = dtStart.Add(toNow);
return dtResult;
}
}
- ChannelScanEntity:
/// <summary>
/// 渠道二维码扫描记录
/// </summary>
[Serializable]
public class ChannelScanEntity : IViewModel<ChannelScanEntity, ChannelScan>
{
static ChannelScanEntity()
{
var map = AutoMapper.Mapper.CreateMap<ChannelScan, ChannelScanEntity>();
map.ForMember(e => e.ScanType, d => d.MapFrom(n => (ScanType)n.ScanType));
var m1 = AutoMapper.Mapper.CreateMap<ChannelScanEntity, ChannelScan>();
m1.ForMember(e => e.ScanType, d => d.MapFrom(n => (short)n.ScanType));
}
/// <summary>
/// ID
/// </summary>
[Key]
public int ID { get; set; }
/// <summary>
/// 扫描微信用户的OpenId
/// </summary>
public string OpenId { get; set; }
/// <summary>
/// 扫描类型
/// </summary>
public ScanType ScanType { get; set; }
/// <summary>
/// 扫描时间
/// </summary>
public DateTime ScanTime { get; set; }
/// <summary>
/// 所属渠道
/// </summary>
public int ChannelId { get; set; }
public ChannelScanEntity GetViewModel(ChannelScan entity)
{
return AutoMapper.Mapper.Map<ChannelScan, ChannelScanEntity>(entity);
}
public ChannelScan GetDataEntity(ChannelScanEntity entity)
{
return AutoMapper.Mapper.Map<ChannelScanEntity, ChannelScan>(entity);
}
}
这里注意要把ScanType转换一下：
var map = AutoMapper.Mapper.CreateMap<ChannelScan, ChannelScanEntity>();
map.ForMember(e => e.ScanType, d => d.MapFrom(n => (ScanType)n.ScanType));var m1 = AutoMapper.Mapper.CreateMap<ChannelScanEntity, ChannelScan>();
m1.ForMember(e => e.ScanType, d => d.MapFrom(n => (short)n.ScanType));
- ChannelType:
/// <summary>
/// 渠道类型
/// </summary>
[Serializable]
public class ChannelTypeEntity : IViewModel<ChannelTypeEntity, ChannelType>
{
static ChannelTypeEntity()
{
AutoMapper.Mapper.CreateMap<ChannelType, ChannelTypeEntity>();
AutoMapper.Mapper.CreateMap<ChannelTypeEntity, ChannelType>();
}
/// <summary>
/// ID
/// </summary>
[Key]
public int ID { get; set; }
/// <summary>
/// 渠道类型名称
/// </summary>
public string Name { get; set; }
public ChannelTypeEntity GetViewModel(ChannelType entity)
{
return AutoMapper.Mapper.Map<ChannelType, ChannelTypeEntity>(entity);
}
public ChannelType GetDataEntity(ChannelTypeEntity entity)
{
return AutoMapper.Mapper.Map<ChannelTypeEntity, ChannelType>(entity);
}
}
4） 定义用于前端显示的渠道扫描记录的 ChannelScanDisplayEntity
由于在前端页面中显示的推广渠道二维码扫描记录需要包含微信用户个人信息。为了方便前端调用，所以定义这个实体：
/// <summary>
/// 用于前端口显示的渠道扫描记录
/// </summary>
[Serializable]
public class ChannelScanDisplayEntity
{
/// <summary>
/// 渠道扫描记录
/// </summary>
public ChannelScanEntity ScanEntity { get; set; }
/// <summary>
/// 扫描渠道的微信用户信息
/// </summary>
public WeixinUserInfoEntity UserInfoEntity { get; set; }
}
主要包含了二个视图类：ChannelScanEntity 和 WeixinUserInfoEntity。
最后视图类结构如下：
未完待续！！！