<#@ assembly name="System.Core.dll" #>
<#@ assembly name="System.Data.dll" #>
<#@ assembly name="System.Data.DataSetExtensions.dll" #>
<#@ assembly name="System.Xml.dll" #>
<#@ import namespace="System" #>
<#@ import namespace="System.Xml" #>
<#@ 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"  #>using System;
namespace T4ConsoleApplication.Entities
{    public class <#=config.TableName#>{<# 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; }<#}#> }
}<#+public class config{//修改要生成的数据库表public static readonly string ConnectionString="Data Source=.;User ID=MyUserID; password=MyPwd;";public static readonly string DbDatabase="MyDataBase";public static readonly string TableName="MyTable";}
#>

<#+public class DbHelper{#region GetDbTablespublic 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 SQLstring sql = string.Format(@"SELECTobj.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 1ELSE 0END AS BIT) HasPrimaryKey                                         from {0}.sys.objects obj inner join {0}.dbo.sysindexes idx on obj.object_id=idx.id and idx.indid<=1INNER JOIN {0}.sys.schemas schem ON obj.schema_id=schem.schema_idwhere type='U' {1}order by obj.name", database, tables);#endregionDataTable 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 GetDbColumnspublic static List<DbColumn> GetDbColumns(string connectionString, string database, string tableName, string schema = "dbo"){#region SQLstring sql = string.Format(@"WITH indexCTE AS(SELECT ic.column_id,ic.index_column_id,ic.object_id    FROM {0}.sys.indexes idxINNER JOIN {0}.sys.index_columns ic ON idx.index_id = ic.index_id AND idx.object_id = ic.object_idWHERE  idx.object_id =OBJECT_ID(@tableName) AND idx.is_primary_key=1)selectcolm.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/2when systype.name='ntext' and colm.max_length>0 then colm.max_length/2 else colm.max_lengthend) CharLength,cast(colm.precision as int) Precision,cast(colm.scale as int) Scale,prop.value Remarkfrom {0}.sys.columns colminner join {0}.sys.types systype on colm.system_type_id=systype.system_type_id and colm.user_type_id=systype.user_type_idleft join {0}.sys.extended_properties prop on colm.object_id=prop.major_id and colm.column_id=prop.minor_idLEFT 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);#endregionSqlParameter 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 GetDataTablepublic 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 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 SqlServerDbTypeMappublic 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 "xml": 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 "xml": commonType = typeof(string); break;default: commonType = typeof(object); break;}return commonType;}}#endregion#>

直接保存即可生成指定数据库表实体生成的实体: