1.前言
前段时间在网上看到一个开源框架很好的。开源：ASP.NET MVC+EF6+Bootstrap开发框架，写代码就是比较比较麻烦，分层比较多，对于我这种偷懒的人就想到了写一个T4模板。不了解框架的可以先去看一下这个开源的框架。
一起有5个层，也就是意味着每次数据库添加一张表，就需要写这5个类。
2.NFine.Domain.Entity
<#@ template debug="false" hostspecific="false" language="C#" #><#@ output extension=".cs" #><#@ assembly name="System.Core.dll" #><#@ assembly name="System.Data.dll" #><#@ assembly name="System.Data.DataSetExtensions.dll" #><#@ assembly name="System." #><#@ import namespace="System" #><#@ import namespace="System." #><#@ import namespace="System.Linq" #><#@ import namespace="System.Data" #><#@ import namespace="System.Data.SqlClient" #><#@ import namespace="System.Collections.Generic" #><#@ import namespace="System.IO" #><#@ include file="$(ProjectDir)DbHelper.ttinclude" #>//------------------------------------------------------------------------------// <博客园-枫伶忆 http://www.cnblogs.com/fenglingyi/>// 此代码由T4模板自动生成// 生成时间 <#=DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss")#> by 枫伶忆// 对此文件的更改可能会导致不正确的行为，并且如果重新生成代码，这些更改将会丢失。// QQ:549387177// <博客园-枫伶忆 http://www.cnblogs.com/fenglingyi/>//------------------------------------------------------------------------------<# var tableName=config.TableName.Replace("Sys_","")+"Entity"; #>using System;namespace NFine.Domain.Entity.SystemManage{ /// <summary> /// <#=tableName#> /// </summary> public class <#=tableName#>:IEntity<<#=tableName#>>, ICreationAudited, IDeleteAudited, IModificationAudited {<# foreach(DbColumn column in DbHelper.GetDbColumns(config.ConnectionString, config.DbDatabase, config.TableName)){#> public <#= column.CSharpType#><# if(column.CommonType.IsValueType && column.IsNullable){#>?<#}#> <#=column.ColumnName#> { get; set; }<#}#> }}3.NFine.Domain.IRepository
<#@ template debug="false" hostspecific="false" language="C#" #><#@ output extension=".cs" #><#@ assembly name="System.Core.dll" #><#@ assembly name="System.Data.dll" #><#@ assembly name="System.Data.DataSetExtensions.dll" #><#@ assembly name="System." #><#@ import namespace="System" #><#@ import namespace="System." #><#@ import namespace="System.Linq" #><#@ import namespace="System.Data" #><#@ import namespace="System.Data.SqlClient" #><#@ import namespace="System.Collections.Generic" #><#@ import namespace="System.IO" #><#@ include file="$(ProjectDir)DbHelper.ttinclude" #>//------------------------------------------------------------------------------// <博客园-枫伶忆 http://www.cnblogs.com/fenglingyi/>// 此代码由T4模板自动生成// 生成时间 <#=DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss")#> by 枫伶忆// 对此文件的更改可能会导致不正确的行为，并且如果重新生成代码，这些更改将会丢失。// QQ:549387177// <博客园-枫伶忆 http://www.cnblogs.com/fenglingyi/>//------------------------------------------------------------------------------<# var tableName=config.TableName.Replace("Sys_","")+"Repository"; var entity=config.TableName.Replace("Sys_","")+"Entity"; #>using NFine.Data;using NFine.Domain.Entity.SystemManage;using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;namespace NFine.Domain.IRepository.SystemManage{ /// <summary> /// <#=tableName#> /// </summary> public interface I<#=tableName#>:IRepositoryBase<<#=entity#>> { }}
4.NFine.Repository
<#@ template debug="false" hostspecific="false" language="C#" #><#@ output extension=".cs" #><#@ assembly name="System.Core.dll" #><#@ assembly name="System.Data.dll" #><#@ assembly name="System.Data.DataSetExtensions.dll" #><#@ assembly name="System." #><#@ import namespace="System" #><#@ import namespace="System." #><#@ import namespace="System.Linq" #><#@ import namespace="System.Data" #><#@ import namespace="System.Data.SqlClient" #><#@ import namespace="System.Collections.Generic" #><#@ import namespace="System.IO" #><#@ include file="$(ProjectDir)DbHelper.ttinclude" #>//------------------------------------------------------------------------------// <博客园-枫伶忆 http://www.cnblogs.com/fenglingyi/>// 此代码由T4模板自动生成// 生成时间 <#=DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss")#> by 枫伶忆// 对此文件的更改可能会导致不正确的行为，并且如果重新生成代码，这些更改将会丢失。// QQ:549387177// <博客园-枫伶忆 http://www.cnblogs.com/fenglingyi/>//------------------------------------------------------------------------------<# var tableName=config.TableName.Replace("Sys_","")+"Repository"; var entity=config.TableName.Replace("Sys_","")+"Entity"; #>using NFine.Data;using NFine.Domain.Entity.SystemManage;using NFine.Domain.IRepository.SystemManage;using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;namespace NFine.Repository.SystemManage{ /// <summary> /// <#=tableName#> /// </summary> public class <#=tableName#>:RepositoryBase<<#=entity#>>,I<#=tableName#> { }}
5.NFine.Mapping
<#@ template debug="false" hostspecific="false" language="C#" #><#@ output extension=".cs" #><#@ assembly name="System.Core.dll" #><#@ assembly name="System.Data.dll" #><#@ assembly name="System.Data.DataSetExtensions.dll" #><#@ assembly name="System." #><#@ import namespace="System" #><#@ import namespace="System." #><#@ import namespace="System.Linq" #><#@ import namespace="System.Data" #><#@ import namespace="System.Data.SqlClient" #><#@ import namespace="System.Collections.Generic" #><#@ import namespace="System.IO" #><#@ include file="$(ProjectDir)DbHelper.ttinclude" #>//------------------------------------------------------------------------------// <博客园-枫伶忆 http://www.cnblogs.com/fenglingyi/>// 此代码由T4模板自动生成// 生成时间 <#=DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss")#> by 枫伶忆// 对此文件的更改可能会导致不正确的行为，并且如果重新生成代码，这些更改将会丢失。// QQ:549387177// <博客园-枫伶忆 http://www.cnblogs.com/fenglingyi/>//------------------------------------------------------------------------------<# var dbTableName=config.TableName; var tableName=config.TableName.Replace("Sys_","")+"Map"; var entity=config.TableName.Replace("Sys_","")+"Entity"; var list= DbHelper.GetDbColumns(config.ConnectionString, config.DbDatabase, config.TableName); var pk = DbHelper.GetPrimaryKey(list); #>using NFine.Domain.Entity.SystemManage;using System.Data.Entity.ModelConfiguration;namespace NFine.Mapping.SystemManage{ /// <summary> /// <#=tableName#> /// </summary> public class <#=tableName#>:EntityTypeConfiguration<<#=entity#>> { public <#=tableName#>() { this.ToTable("<#=dbTableName#>"); this.HasKey(t=>t.<#=pk#>); } }}
6.NFine.Application
<#@ template debug="false" hostspecific="false" language="C#" #><#@ output extension=".cs" #><#@ assembly name="System.Core.dll" #><#@ assembly name="System.Data.dll" #><#@ assembly name="System.Data.DataSetExtensions.dll" #><#@ assembly name="System." #><#@ import namespace="System" #><#@ import namespace="System." #><#@ import namespace="System.Linq" #><#@ import namespace="System.Data" #><#@ import namespace="System.Data.SqlClient" #><#@ import namespace="System.Collections.Generic" #><#@ import namespace="System.IO" #><#@ include file="$(ProjectDir)DbHelper.ttinclude" #>//------------------------------------------------------------------------------// <博客园-枫伶忆 http://www.cnblogs.com/fenglingyi/>// 此代码由T4模板自动生成// 生成时间 <#=DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss")#> by 枫伶忆// 对此文件的更改可能会导致不正确的行为，并且如果重新生成代码，这些更改将会丢失。// QQ:549387177// <博客园-枫伶忆 http://www.cnblogs.com/fenglingyi/>//------------------------------------------------------------------------------<# var tableName=config.TableName.Replace("Sys_","")+"App"; var entity=config.TableName.Replace("Sys_","")+"Entity"; var repository=config.TableName.Replace("Sys_","")+"Repository"; #>using System;using System.Collections.Generic;using System.Linq;using System.Text;using NFine.Domain.Entity.SystemManage;using NFine.Domain.IRepository.SystemManage;using NFine.Repository.SystemManage;namespace NFine.Application.SystemManage{ /// <summary> /// <#=tableName#> /// </summary> public class <#=tableName#> { private I<#=repository#> service=new <#=repository#>(); public List<<#=entity#>> GetList() { return service.IQueryable().ToList(); } public <#=entity#> GetForm(string keyValue) { return service.FindEntity(keyValue); } public void Delete(<#=entity#> entity) { service.Delete(entity); } public void SubmitForm(<#=entity#> entity, string keyValue) { if (!string.IsNullOrEmpty(keyValue)) { entity.Modify(keyValue); service.Update(entity); } else { entity.Create(); service.Insert(entity); } } }} 7.DbHelper.ttinclude
核心的帮助类
<#+ public class DbHelper { #region GetDbTables public static List<DbTable> GetDbTables(string connectionString, string database, string tables = null) { if (!string.IsNullOrEmpty(tables)) { tables = string.Format(" and obj.name in ('{0}')", tables.Replace(",", "','")); } #region SQL string sql = string.Format(@"SELECT obj.name tablename, schem.name schemname, idx.rows, CAST ( CASE WHEN (SELECT COUNT(1) FROM sys.indexes WHERE object_id= obj.OBJECT_ID AND is_primary_key=1) >=1 THEN 1 ELSE 0 END AS BIT) HasPrimaryKey from {0}.sys.objects obj inner join {0}.dbo.sysindexes idx on obj.object_id=idx.id and idx.indid<=1 INNER JOIN {0}.sys.schemas schem ON obj.schema_id=schem.schema_id where type='U' {1} order by obj.name", database, tables); #endregion DataTable dt = GetDataTable(connectionString, sql); return dt.Rows.Cast<DataRow>().Select(row => new DbTable { TableName = row.Field<string>("tablename"), SchemaName = row.Field<string>("schemname"), Rows = row.Field<int>("rows"), HasPrimaryKey = row.Field<bool>("HasPrimaryKey") }).ToList(); } #endregion #region GetDbColumns public static List<DbColumn> GetDbColumns(string connectionString, string database, string tableName, string schema = "dbo") { #region SQL string sql = string.Format(@" WITH indexCTE AS ( SELECT ic.column_id, ic.index_column_id, ic.object_id FROM {0}.sys.indexes idx INNER JOIN {0}.sys.index_columns ic ON idx.index_id = ic.index_id AND idx.object_id = ic.object_id WHERE idx.object_id =OBJECT_ID(@tableName) AND idx.is_primary_key=1 ) select colm.column_id ColumnID, CAST(CASE WHEN indexCTE.column_id IS NULL THEN 0 ELSE 1 END AS BIT) IsPrimaryKey, colm.name ColumnName, systype.name ColumnType, colm.is_identity IsIdentity, colm.is_nullable IsNullable, cast(colm.max_length as int) ByteLength, ( case when systype.name='nvarchar' and colm.max_length>0 then colm.max_length/2 when systype.name='nchar' and colm.max_length>0 then colm.max_length/2 when systype.name='ntext' and colm.max_length>0 then colm.max_length/2 else colm.max_length end ) CharLength, cast(colm.precision as int) Precision, cast(colm.scale as int) Scale, prop.value Remark from {0}.sys.columns colm inner join {0}.sys.types systype on colm.system_type_id=systype.system_type_id and colm.user_type_id=systype.user_type_id left join {0}.sys.extended_properties prop on colm.object_id=prop.major_id and colm.column_id=prop.minor_id LEFT JOIN indexCTE ON colm.column_id=indexCTE.column_id AND colm.object_id=indexCTE.object_id where colm.object_id=OBJECT_ID(@tableName) order by colm.column_id", database); #endregion SqlParameter param = new SqlParameter("@tableName", SqlDbType.NVarChar, 100) { Value = string.Format("{0}.{1}.{2}", database, schema, tableName) }; DataTable dt = GetDataTable(connectionString, sql, param); return dt.Rows.Cast<DataRow>().Select(row => new DbColumn() { ColumnID = row.Field<int>("ColumnID"), IsPrimaryKey = row.Field<bool>("IsPrimaryKey"), ColumnName = row.Field<string>("ColumnName"), ColumnType = row.Field<string>("ColumnType"), IsIdentity = row.Field<bool>("IsIdentity"), IsNullable = row.Field<bool>("IsNullable"), ByteLength = row.Field<int>("ByteLength"), CharLength = row.Field<int>("CharLength"), Scale = row.Field<int>("Scale"), Remark = row["Remark"].ToString() }).ToList(); } #endregion #region GetDataTable public static DataTable GetDataTable(string connectionString, string commandText, params SqlParameter[] parms) { using (SqlConnection connection = new SqlConnection(connectionString)) { SqlCommand command = connection.CreateCommand(); command.CommandText = commandText; command.Parameters.AddRange(parms); SqlDataAdapter adapter = new SqlDataAdapter(command); DataTable dt = new DataTable(); adapter.Fill(dt); return dt; } } #endregion #region GetPrimaryKey public static string GetPrimaryKey(List<DbColumn> dbColumns) { string primaryKey = string.Empty; if (dbColumns!=null&&dbColumns.Count>0) { foreach (var item in dbColumns) { if (item.IsPrimaryKey==true) { primaryKey = item.ColumnName; } } } return primaryKey; } #endregion } #region DbTable /// <summary> /// 表结构 /// </summary> public sealed class DbTable { /// <summary> /// 表名称 /// </summary> public string TableName { get; set; } /// <summary> /// 表的架构 /// </summary> public string SchemaName { get; set; } /// <summary> /// 表的记录数 /// </summary> public int Rows { get; set; } /// <summary> /// 是否含有主键 /// </summary> public bool HasPrimaryKey { get; set; } } #endregion #region DbColumn /// <summary> /// 表字段结构 /// </summary> public sealed class DbColumn { /// <summary> /// 字段ID /// </summary> public int ColumnID { get; set; } /// <summary> /// 是否主键 /// </summary> public bool IsPrimaryKey { get; set; } /// <summary> /// 字段名称 /// </summary> public string ColumnName { get; set; } /// <summary> /// 字段类型 /// </summary> public string ColumnType { get; set; } /// <summary> /// 数据库类型对应的C#类型 /// </summary> public string CSharpType { get { return SqlServerDbTypeMap.MapCsharpType(ColumnType); } } /// <summary> /// /// </summary> public Type CommonType { get { return SqlServerDbTypeMap.MapCommonType(ColumnType); } } /// <summary> /// 字节长度 /// </summary> public int ByteLength { get; set; } /// <summary> /// 字符长度 /// </summary> public int CharLength { get; set; } /// <summary> /// 小数位 /// </summary> public int Scale { get; set; } /// <summary> /// 是否自增列 /// </summary> public bool IsIdentity { get; set; } /// <summary> /// 是否允许空 /// </summary> public bool IsNullable { get; set; } /// <summary> /// 描述 /// </summary> public string Remark { get; set; } } #endregion #region SqlServerDbTypeMap public class SqlServerDbTypeMap { public static string MapCsharpType(string dbtype) { if (string.IsNullOrEmpty(dbtype)) return dbtype; dbtype = dbtype.ToLower(); string csharpType = "object"; switch (dbtype) { case "bigint": csharpType = "long"; break; case "binary": csharpType = "byte[]"; break; case "bit": csharpType = "bool"; break; case "char": csharpType = "string"; break; case "date": csharpType = "DateTime"; break; case "datetime": csharpType = "DateTime"; break; case "datetime2": csharpType = "DateTime"; break; case "datetimeoffset": csharpType = "DateTimeOffset"; break; case "decimal": csharpType = "decimal"; break; case "float": csharpType = "double"; break; case "image": csharpType = "byte[]"; break; case "int": csharpType = "int"; break; case "money": csharpType = "decimal"; break; case "nchar": csharpType = "string"; break; case "ntext": csharpType = "string"; break; case "numeric": csharpType = "decimal"; break; case "nvarchar": csharpType = "string"; break; case "real": csharpType = "Single"; break; case "smalldatetime": csharpType = "DateTime"; break; case "smallint": csharpType = "short"; break; case "smallmoney": csharpType = "decimal"; break; case "sql_variant": csharpType = "object"; break; case "sysname": csharpType = "object"; break; case "text": csharpType = "string"; break; case "time": csharpType = "TimeSpan"; break; case "timestamp": csharpType = "byte[]"; break; case "tinyint": csharpType = "byte"; break; case "uniqueidentifier": csharpType = "Guid"; break; case "varbinary": csharpType = "byte[]"; break; case "varchar": csharpType = "string"; break; case "": csharpType = "string"; break; default: csharpType = "object"; break; } return csharpType; } public static Type MapCommonType(string dbtype) { if (string.IsNullOrEmpty(dbtype)) return Type.Missing.GetType(); dbtype = dbtype.ToLower(); Type commonType = typeof(object); switch (dbtype) { case "bigint": commonType = typeof(long); break; case "binary": commonType = typeof(byte[]); break; case "bit": commonType = typeof(bool); break; case "char": commonType = typeof(string); break; case "date": commonType = typeof(DateTime); break; case "datetime": commonType = typeof(DateTime); break; case "datetime2": commonType = typeof(DateTime); break; case "datetimeoffset": commonType = typeof(DateTimeOffset); break; case "decimal": commonType = typeof(decimal); break; case "float": commonType = typeof(double); break; case "image": commonType = typeof(byte[]); break; case "int": commonType = typeof(int); break; case "money": commonType = typeof(decimal); break; case "nchar": commonType = typeof(string); break; case "ntext": commonType = typeof(string); break; case "numeric": commonType = typeof(decimal); break; case "nvarchar": commonType = typeof(string); break; case "real": commonType = typeof(Single); break; case "smalldatetime": commonType = typeof(DateTime); break; case "smallint": commonType = typeof(short); break; case "smallmoney": commonType = typeof(decimal); break; case "sql_variant": commonType = typeof(object); break; case "sysname": commonType = typeof(object); break; case "text": commonType = typeof(string); break; case "time": commonType = typeof(TimeSpan); break; case "timestamp": commonType = typeof(byte[]); break; case "tinyint": commonType = typeof(byte); break; case "uniqueidentifier": commonType = typeof(Guid); break; case "varbinary": commonType = typeof(byte[]); break; case "varchar": commonType = typeof(string); break; case "": commonType = typeof(string); break; default: commonType = typeof(object); break; } return commonType; } } #endregion #><#+ public class config { public static readonly string ConnectionString = "Data Source=(local);Initial Catalog=NFineBase;User ID=sa;Password=hjf19870810;"; public static readonly string DbDatabase = "NFineBase"; public static readonly string TableName = "Sys_Test"; }#>8.ModelAuto.ttinclude
用来生成多个单独的类文件。
<#@ assembly name="System.Core"#><#@ assembly name="EnvDTE"#><#@ import namespace="System.Collections.Generic"#><#@ import namespace="System.IO"#><#@ import namespace="System.Text"#><#@ import namespace="Microsoft.VisualStudio.TextTemplating"#><#+class Manager{ public struct Block { public String Name; public int Start, Length; } public List<Block> blocks = new List<Block>(); public Block currentBlock; public Block footerBlock = new Block(); public Block headerBlock = new Block(); public ITextTemplatingEngineHost host; public ManagementStrategy strategy; public StringBuilder template; public String OutputPath { get; set; } public Manager(ITextTemplatingEngineHost host, StringBuilder template, bool commonHeader) { this.host = host; this.template = template; OutputPath = String.Empty; strategy = ManagementStrategy.Create(host); } public void StartBlock(String name) { currentBlock = new Block { Name = name, Start = template.Length }; } public void StartFooter() { footerBlock.Start = template.Length; } public void EndFooter() { footerBlock.Length = template.Length - footerBlock.Start; } public void StartHeader() { headerBlock.Start = template.Length; } public void EndHeader() { headerBlock.Length = template.Length - headerBlock.Start; } public void EndBlock() { currentBlock.Length = template.Length - currentBlock.Start; blocks.Add(currentBlock); } public void Process(bool split) { String header = template.ToString(headerBlock.Start, headerBlock.Length); String footer = template.ToString(footerBlock.Start, footerBlock.Length); blocks.Reverse(); foreach(Block block in blocks) { String fileName = Path.Combine(OutputPath, block.Name); if (split) { String content = header + template.ToString(block.Start, block.Length) + footer; strategy.CreateFile(fileName, content); template.Remove(block.Start, block.Length); } else { strategy.DeleteFile(fileName); } } }}class ManagementStrategy{ internal static ManagementStrategy Create(ITextTemplatingEngineHost host) { return (host is IServiceProvider) ? new VSManagementStrategy(host) : new ManagementStrategy(host); } internal ManagementStrategy(ITextTemplatingEngineHost host) { } internal virtual void CreateFile(String fileName, String content) { File.WriteAllText(fileName, content); } internal virtual void DeleteFile(String fileName) { if (File.Exists(fileName)) File.Delete(fileName); }}class VSManagementStrategy : ManagementStrategy{ private EnvDTE.ProjectItem templateProjectItem; internal VSManagementStrategy(ITextTemplatingEngineHost host) : base(host) { IServiceProvider hostServiceProvider = (IServiceProvider)host; if (hostServiceProvider == null) throw new ArgumentNullException("Could not obtain hostServiceProvider"); EnvDTE.DTE dte = (EnvDTE.DTE)hostServiceProvider.GetService(typeof(EnvDTE.DTE)); if (dte == null) throw new ArgumentNullException("Could not obtain DTE from host"); templateProjectItem = dte.Solution.FindProjectItem(host.TemplateFile); } internal override void CreateFile(String fileName, String content) { base.CreateFile(fileName, content); ((EventHandler)delegate { templateProjectItem.ProjectItems.AddFromFile(fileName); }).BeginInvoke(null, null, null, null); } internal override void DeleteFile(String fileName) { ((EventHandler)delegate { FindAndDeleteFile(fileName); }).BeginInvoke(null, null, null, null); } private void FindAndDeleteFile(String fileName) { foreach(EnvDTE.ProjectItem projectItem in templateProjectItem.ProjectItems) { if (projectItem.get_FileNames(0) == fileName) { projectItem.Delete(); return; } } }}#>View Code
模板在此下载。
1.T4语法快速入门
2.T4模板根据DB生成实体类
3.NFine框架的T4模板
原标题：NFine框架的T4模板
关键词：
我知道了 