自己编码实现数据库的映射实体的代码生成器_MySQL

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以前很多时候都是使用CodeSmith或动软生成相关的数据库访问代码（不喜欢使用持久化框架），可以CodeSmith对中文的支持不好，新下载的6.5的版本，怎样都不能正确显示中文，动软代码生成器的表字段的注释永远都显示不了（李天平的败笔），有几个属性如MySql的smallint,tinyint，得重新更改选项的映射表，太麻烦了。虽然说动软现在提供了模块生成功能，批量生成中对表的重命名也不能够，功能有点弱呀，于是自己写个代码生成器，按自己的规则去生成，注释也出来了，多了注释提示，对开发帮助很大的。代码如下：

 

        private void CreateModel()        {            string connectionString = "server=127.0.0.1;port=3306;User Id=root;Password=root;database=ipbroadcast;Connect Timeout=60;Treat Tiny As Boolean=False";            MySql.Data.MySqlClient.MySqlConnection conn = new MySql.Data.MySqlClient.MySqlConnection(connectionString);            conn.Open();            DataTable table = conn.GetSchema("TABLES");            foreach (DataRow row in table.Rows)            {                DataTable sheetTable = GetSchemaTable(conn, row);                string tName = row["TABLE_NAME"].ToString();                CreateEntityFile(conn, tName, sheetTable);            }            conn.Close();        }        private DataTable GetSchemaTable(MySqlConnection conn, DataRow row)        {            string sheetName = row["TABLE_Name"].ToString();            MySqlCommand com = conn.CreateCommand();            com.CommandType = CommandType.Text;            com.CommandText = "Select * From " + sheetName;            IDataReader reader = com.ExecuteReader(CommandBehavior.SchemaOnly);            DataTable table = reader.GetSchemaTable();            com.Dispose();            reader.Close();            return table;        }        private void CreateEntityFile(MySqlConnection conn, string tName, DataTable table)        {            //定义生成文件的路径            string tableName = tName;            string schemaName = "";            string colName = "";            string path = @"F:/IPBroadcastModel/Model1";            if (!Directory.Exists(path))                Directory.CreateDirectory(path);            MySqlCommand com = conn.CreateCommand();            com.CommandType = CommandType.Text;            Dictionary<string, string> dict = new Dictionary<string, string>();            bool isGetComment = false;            //写文件            string clsName = "Ety" + tableName.Substring(3, 1).ToUpper() + tableName.Substring(4);            string fileName = clsName + ".cs";            string fullName = Path.Combine(path, fileName);            using (FileStream fs = new FileStream(fullName, FileMode.Create))            {                StreamWriter sw = new StreamWriter(fs, Encoding.UTF8);                sw.WriteLine("using System;");                sw.WriteLine("using System.Text;");                sw.WriteLine("using System.Collections.Generic; ");                sw.WriteLine("using System.Data;");                sw.WriteLine("namespace AEBell.DBManager");                sw.WriteLine("{");                sw.WriteLine("/t[Serializable]");                sw.WriteLine("/tpublic class " + clsName);                sw.WriteLine("/t{");                foreach (DataRow row in table.Rows)                {                    //tableName = row["BaseTableName"].ToString();                    colName = row["ColumnName"].ToString();                    schemaName = row["BaseSchemaName"].ToString();                    if (!isGetComment)                    {                        isGetComment = true;                        GetFielComment(tableName, schemaName, com, dict);                    }                    sw.WriteLine("/t/t/// <summary>");                    sw.WriteLine("/t/t/// " + dict[colName]);                    sw.WriteLine("/t/t/// </summary>");                    Type info = row["DataType"] as Type;                    string declear = info.Name;                    if (declear.ToUpper() == "SBYTE")   //为了适应动软。                        declear = "Byte";                    bool isNull = (bool)row["AllowDBNull"];                    if (isNull && info.BaseType.Name == "ValueType")                        declear += "?";                    sw.WriteLine("/t/tpublic " + declear + " " + colName.Substring(0, 1).ToUpper() + colName.Substring(1));                    sw.WriteLine("/t/t{");                    sw.WriteLine("/t/t/tget;");                    sw.WriteLine("/t/t/tset;");                    sw.WriteLine("/t/t}");                }                sw.WriteLine("/t}");                sw.WriteLine("}");                sw.Close();            }        }        private static void GetFielComment(string tableName, string schemaName, MySqlCommand com, Dictionary<string, string> dict)        {            string comment = "";            com.CommandText = "Select COLUMN_NAME,DATA_TYPE, COLUMN_COMMENT From  INFORMATION_SCHEMA.COLUMNS where table_name ='"                + tableName + "' AND table_schema = '" + schemaName + "'"; // AND column_name LIKE '" + colName + "'";            IDataReader reader = com.ExecuteReader();            while (reader.Read())            {                string colName = reader.GetString(0);                comment = reader.GetString(2);                dict[colName] = comment;            }            reader.Close();        }

 虽然实现不是很严谨，DAL和BLL层也没有实现，但有需要之人是可以很快实现的。不对之处，请指正。

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