T4模板批量生成代码文件

 <#@ 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)\HClubMall.Model\T4\MultipleOutputHelper.ttinclude" #> 

 <#
     var manager = Manager.Create(Host, GenerationEnvironment);
     manager.StartHeader();
 #>

 using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;

 namespace HClubMall.Model
 {
 <# manager.EndBlock(); #>

 <#
     string connectionString= "server=192.168.0.23;database=Hclub1031;uid=sa;pwd=seindotnet;";
     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();
     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");
 #>
     [Serializable]
     /// <summary>
     /// 实体-<#=tb_name#>
     /// </summary>
     public partial class <#=tb_name#>
     {
         <#
         PushIndent("          ");
         WriteLine("  #region 属性");
         foreach (DataColumn dc in ds.Tables[].Columns)
         {
             WriteLine("/// <summary>");
             WriteLine("/// ");
             WriteLine("/// </summary>");
             WriteLine("public " + dc.DataType.Name + (dc.AllowDBNull && (dc.DataType.Name.ToLower() != "string")&&(dc.DataType.Name.ToLower()!="byte[]") ? "? ": " ") + dc.ColumnName + " { get; set; }");
         }
         WriteLine("#endregion");
         PopIndent();
         #>
     }
 <#
         manager.EndBlock();
     }
     conn.Close();
 #>

 <# manager.StartFooter(); #>
 }
 <# manager.EndBlock(); #>

 <# manager.Process(true); #>

1.需要引用一个国外的批量生成代码模板MultipleOutputHelper.ttinclude

2.创建一个T4模板，复制上面的代码放到新创建的T4模板中。

3.Ctrl+S

4.效果图：

注意：

MultipleOutputHelper.ttinclude项目在桌面时会报错。