FluentData-新型轻量级ORM 利用T4模板批量生成多文件实体和业务逻辑代码

FluentData，它是一个轻量级框架，关注性能和易用性。
下载地址：FlunenData.Model

利用T4模板，【MultipleOutputHelper.ttinclude】批量生成多文件

基本语法：

1. 初始化：获取MultipleOutputHelper.ttinclude文件模板在T4模板导入

  //导入MultipleOutputHelper.ttinclude文件 路径<#@include file="$(SolutionDir)\ORM.Model\T4\MultipleOutputHelper.ttinclude"#>

  //初始化Manager对象 var manager = Manager.Create(Host, GenerationEnvironment);

.csharpcode, .csharpcode pre { font-size: small; color: rgba(0, 0, 0, 1); font-family: consolas, "Courier New", courier, monospace; background-color: rgba(255, 255, 255, 1) } .csharpcode pre { margin: 0 } .csharpcode .rem { color: rgba(0, 128, 0, 1) } .csharpcode .kwrd { color: rgba(0, 0, 255, 1) } .csharpcode .str { color: rgba(0, 96, 128, 1) } .csharpcode .op { color: rgba(0, 0, 192, 1) } .csharpcode .preproc { color: rgba(204, 102, 51, 1) } .csharpcode .asp { background-color: rgba(255, 255, 0, 1) } .csharpcode .html { color: rgba(128, 0, 0, 1) } .csharpcode .attr { color: rgba(255, 0, 0, 1) } .csharpcode .alt { background-color: rgba(244, 244, 244, 1); width: 100%; margin: 0 } .csharpcode .lnum { color: rgba(96, 96, 96, 1) } .csharpcode, .csharpcode pre { font-size: small; color: rgba(0, 0, 0, 1); font-family: consolas, "Courier New", courier, monospace; background-color: rgba(255, 255, 255, 1) } .csharpcode pre { margin: 0 } .csharpcode .rem { color: rgba(0, 128, 0, 1) } .csharpcode .kwrd { color: rgba(0, 0, 255, 1) } .csharpcode .str { color: rgba(0, 96, 128, 1) } .csharpcode .op { color: rgba(0, 0, 192, 1) } .csharpcode .preproc { color: rgba(204, 102, 51, 1) } .csharpcode .asp { background-color: rgba(255, 255, 0, 1) } .csharpcode .html { color: rgba(128, 0, 0, 1) } .csharpcode .attr { color: rgba(255, 0, 0, 1) } .csharpcode .alt { background-color: rgba(244, 244, 244, 1); width: 100%; margin: 0 } .csharpcode .lnum { color: rgba(96, 96, 96, 1) }

2.文件块：使用代码标识区分生成的代码块的范围
manager.StartNewFile(tb_name+".cs"); //代码块
manager.EndBlock();

3.编译执行：使用Process方法，进行文件分割

 manager.Process(true);

实践：

1.批量生成实体类

<#@ template debug="false" hostspecific="true" language="C#" #>
<#@ assembly name="System.Data" #>
<#@ assembly name="System.xml" #>
<#@ import namespace="System.Collections.Generic" #>
<#@ import namespace="System.Data.SqlClient" #>
<#@ import namespace="System.Data" #>
<#@ assembly name="System.Core" #>
<#@ import namespace="System.Linq" #>//  导入MultipleOutputHelper.ttinclude文件
<#@include file="$(SolutionDir)\My.Model\T4\MultipleOutputHelper.ttinclude"#> <#        string connectionString= "server=qq;database=db;uid=sa;pwd=sa;";        SqlConnection conn = new SqlConnection(connectionString);conn.Open();string selectQuery ="SET FMTONLY ON; select * from @tableName; SET FMTONLY OFF;";SqlCommand command = new SqlCommand(selectQuery,conn);SqlDataAdapter ad = new SqlDataAdapter(command);System.Data.DataSet ds = new DataSet(); var manager = Manager.Create(Host, GenerationEnvironment);  System.Data.DataTable schema = conn.GetSchema("Tables");foreach(System.Data.DataRow row in schema.Rows){    ds.Tables.Clear();string tb_name= row["TABLE_NAME"].ToString();        command.CommandText = selectQuery.Replace("@tableName",row["TABLE_NAME"].ToString());ad.FillSchema(ds, SchemaType.Mapped,tb_name);  manager.StartNewFile(tb_name+".cs");#>using FluentData;
using System;
using System.Collections.Generic;
namespace My.Model
{    /// <summary>/// 实体-<#=tb_name#> /// </summary>public partial class <#=tb_name#>    {    <#PushIndent("          ");foreach (DataColumn dc in ds.Tables[0].Columns) {WriteLine("public " + dc.DataType.Name+ (dc.AllowDBNull && dc.DataType.Name.ToLower() != "string" ? "? ": " ") + dc.ColumnName + " { get; set; }");}PopIndent();#>}
}<#manager.EndBlock();    }            conn.Close();  manager.Process(true);  #>

2.批量生成基础业务逻辑

<#@ template debug="false" hostspecific="true" language="C#" #>
<#@ assembly name="System.Data" #>
<#@ assembly name="System.xml" #>
<#@ import namespace="System.Collections.Generic" #>
<#@ import namespace="System.Data.SqlClient" #>
<#@ import namespace="System.Data" #>
<#@ assembly name="System.Core" #>
<#@ import namespace="System.Linq" #>//  导入MultipleOutputHelper.ttinclude文件
<#@include file="$(SolutionDir)\MY.Model\T4\MultipleOutputHelper.ttinclude"#> <#        string connectionString= "server=QQ;database=DB;uid=sa;pwd=sa;";        SqlConnection conn = new SqlConnection(connectionString);conn.Open();string selectQuery ="SET FMTONLY ON; select * from @tableName; SET FMTONLY OFF;";SqlCommand command = new SqlCommand(selectQuery,conn);SqlDataAdapter ad = new SqlDataAdapter(command);System.Data.DataSet ds = new DataSet(); var manager = Manager.Create(Host, GenerationEnvironment);  System.Data.DataTable schema = conn.GetSchema("Tables");foreach(System.Data.DataRow row in schema.Rows){    ds.Tables.Clear();string tb_name= row["TABLE_NAME"].ToString();        command.CommandText = selectQuery.Replace("@tableName",row["TABLE_NAME"].ToString());ad.FillSchema(ds, SchemaType.Mapped,tb_name);  manager.StartNewFile(tb_name+"Action.cs");#>using System;
using System.Collections.Generic;
using MY.Model;
using FluentData;
namespace MY.BLL
{    /// <summary>/// <#=tb_name#> 操作类/// </summary>public partial class <#=tb_name#>Action{<#string fkQuery = " SELECT f.name AS ForeignKey,";fkQuery += " OBJECT_NAME(f.parent_object_id) AS TableName, ";fkQuery += " COL_NAME(fc.parent_object_id, fc.parent_column_id) AS ColumnName, ";fkQuery += " OBJECT_NAME (f.referenced_object_id) AS ReferenceTableName, ";fkQuery += " COL_NAME(fc.referenced_object_id, fc.referenced_column_id) AS ReferenceColumnName ";fkQuery += " FROM ";fkQuery += " sys.foreign_keys AS f ";fkQuery += " INNER JOIN sys.foreign_key_columns AS fc ON f.OBJECT_ID = fc.constraint_object_id ";fkQuery += " where OBJECT_NAME(f.parent_object_id) = '" +tb_name +"'";List<string> fkColumnNames = new List<string>();Dictionary<string, string> parentTables = new Dictionary<string, string>();SqlCommand command2 = new SqlCommand(fkQuery,conn);using(var dr = command2.ExecuteReader()){while(dr.Read()){fkColumnNames.Add(dr["ColumnName"].ToString());parentTables.Add(dr["ColumnName"].ToString(), dr["ReferenceTableName"].ToString());}dr.Close();}List<DataColumn> fkColumns = new List<DataColumn>();foreach(string fkColumnName in fkColumnNames){foreach (DataColumn dc in ds.Tables[0].Columns) {if(dc.ColumnName == fkColumnName)fkColumns.Add(dc);}}List<string> primaryKeyParamsWithTypes = new List<string>();List<string> primaryKeyParams = new List<string>();List<string> whereItems = new List<string>();List<string> automapItems = new List<string>();foreach(DataColumn pk in ds.Tables[0].PrimaryKey){primaryKeyParamsWithTypes.Add(string.Format("{0} {1}", pk.DataType.Name, this.ToCamelCase(pk.ColumnName)));primaryKeyParams.Add(pk.ColumnName);whereItems.Add(string.Format("{0} = @{1}", pk.ColumnName, pk.ColumnName.ToLower()));automapItems.Add(string.Format("x.{0}", pk.ColumnName));}string updateAutomap = string.Empty;if(automapItems.Count > 0){if(automapItems.Count > 1)updateAutomap = "new { " + string.Join(", ", automapItems.ToArray()) + " }";elseupdateAutomap = automapItems[0];}#>public static <#=tb_name#> Select(<#=string.Join(", ", primaryKeyParamsWithTypes.ToArray())#>){using(var context = db.Context()){return context.Sql(" SELECT * FROM <#=tb_name#> WHERE <#=string.Join(" AND ", whereItems.ToArray())#> ")<#foreach(string pkp in primaryKeyParams) {WriteLine(".Parameter(\"" + pkp.ToLower() + "\", " + this.ToCamelCase(pkp) + ")");}#>.QuerySingle<<#=tb_name#>>();}}public static List<<#=tb_name#>> SelectAll(){return SelectAll(string.Empty);}public static List<<#=tb_name#>> SelectAll(string sortExpression){return SelectAll(0, 0, sortExpression);}public static List<<#=tb_name#>> SelectAll(int startRowIndex, int maximumRows, string sortExpression){using (var context = db.Context()){var select = context.Select<<#=tb_name#>>(" * ").From(" <#=tb_name#> ");if (maximumRows > 0){if (startRowIndex == 0) startRowIndex = 1;select.Paging(startRowIndex, maximumRows);}if (!string.IsNullOrEmpty(sortExpression))select.OrderBy(sortExpression);return select.QueryMany();}}public static int CountAll(){using (var context = db.Context()){return context.Sql(" SELECT COUNT(*) FROM <#=tb_name#> ").QuerySingle<int>();}}<#foreach(DataColumn dc in fkColumns){#>public static List<<#=tb_name#>> SelectBy<#=parentTables[dc.ColumnName]#>(<#=dc.DataType.Name#> <#=this.ToCamelCase(dc.ColumnName)#>){return SelectBy<#=parentTables[dc.ColumnName]#>(<#=this.ToCamelCase(dc.ColumnName)#>, string.Empty);}public static List<<#=tb_name#>> SelectBy<#=parentTables[dc.ColumnName]#>(<#=dc.DataType.Name#> <#=this.ToCamelCase(dc.ColumnName)#>, string sortExpression){return SelectBy<#=parentTables[dc.ColumnName]#>(<#=this.ToCamelCase(dc.ColumnName)#>, 0, 0, sortExpression);}public static List<<#=tb_name#>> SelectBy<#=parentTables[dc.ColumnName]#>(<#=dc.DataType.Name#> <#=this.ToCamelCase(dc.ColumnName)#>, int startRowIndex, int maximumRows, string sortExpression){using (var context = db.Context()){var select = context.Select<<#=tb_name#>>(" * ").From(" <#=tb_name#> ").Where(" <#=dc.ColumnName#> = @<#=dc.ColumnName.ToLower()#> ").Parameter("<#=dc.ColumnName.ToLower()#>", <#=this.ToCamelCase(dc.ColumnName)#>);if (maximumRows > 0){if (startRowIndex == 0) startRowIndex = 1;select.Paging(startRowIndex, maximumRows);}if (!string.IsNullOrEmpty(sortExpression))select.OrderBy(sortExpression);return select.QueryMany();}}public static int CountBy<#=parentTables[dc.ColumnName]#>(<#=dc.DataType.Name#> <#=this.ToCamelCase(dc.ColumnName)#>){using (var context = db.Context()){return context.Sql(" SELECT COUNT(*) FROM <#=tb_name#> WHERE <#=dc.ColumnName#> = @<#=dc.ColumnName.ToLower()#>").Parameter("<#=dc.ColumnName.ToLower()#>", <#=this.ToCamelCase(dc.ColumnName)#>).QuerySingle<int>();}}<#}#><#if(ds.Tables[0].PrimaryKey != null && ds.Tables[0].PrimaryKey.Length == 1 && ds.Tables[0].PrimaryKey[0].AutoIncrement) {#>public static bool Insert(<#=tb_name#> <#=this.ToCamelCase(tb_name)#>) {using (var context = db.Context()){int id = context.Insert<<#=tb_name#>>("<#=tb_name#>", <#=this.ToCamelCase(tb_name)#>).AutoMap(x => x.<#=primaryKeyParams[0]#>).ExecuteReturnLastId<int>();<#=this.ToCamelCase(tb_name)#>.<#=primaryKeyParams[0]#> = id;return id > 0;}}
<#
}
else
{
#>public static bool Insert(<#=tb_name#> <#=this.ToCamelCase(tb_name)#>) {using (var context =db.Context()){return context.Insert<<#=tb_name#>>("<#=tb_name#>", <#=this.ToCamelCase(tb_name)#>).Execute() > 0;}}
<#}#>public static bool Update(<#=tb_name#> <#=this.ToCamelCase(tb_name)#>){using (var context = db.Context()){return context.Update<<#=tb_name#>>("<#=tb_name#>", <#=this.ToCamelCase(tb_name)#>).AutoMap(x => <#=updateAutomap#>)<#foreach(string pkp in primaryKeyParams){#>.Where("<#=pkp#>", <#=this.ToCamelCase(tb_name)#>.<#=pkp#>)<#}#>.Execute() > 0;}}public static bool Delete(<#=tb_name#> <#=this.ToCamelCase(tb_name)#>) {return Delete(<#=string.Join(", ", primaryKeyParams.Select(x=> this.ToCamelCase(tb_name) + "." + x).ToArray())#>);}public static bool Delete(<#=string.Join(", ", primaryKeyParamsWithTypes.ToArray())#>){using (var context = db.Context()){return context.Sql(" DELETE FROM Product WHERE <#=string.Join(" AND ", whereItems.ToArray())#> ")<#foreach(string pkp in primaryKeyParams) {WriteLine(".Parameter(\"" + pkp.ToLower() + "\", " + this.ToCamelCase(pkp) + ")");}#>.Execute() > 0;}}}}<#manager.EndBlock();    }            conn.Close();  manager.Process(true);  #> <#+public string ToCamelCase(string value){if(string.IsNullOrEmpty(value)) return string.Empty;string firstLetter = value.Substring(0, 1);string rest = value.Substring(1, value.Length - 1);return firstLetter.ToLower() + rest;}
#>

CTRL+S 自动生成

下载地址：FlunenData.Model

完成！即可快速开发了！

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