自己编码实现数据库的映射实体的代码生成器

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:IPBroadcastModelModel1";
            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("	[Serializable]");
                sw.WriteLine("	public class " + clsName);
                sw.WriteLine("	{");
                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("		/// <summary>");
                    sw.WriteLine("		/// " + dict[colName]);
                    sw.WriteLine("		/// </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("		public " + declear + " " + colName.Substring(0, 1).ToUpper() + colName.Substring(1));
                    sw.WriteLine("		{");
                    sw.WriteLine("			get;");
                    sw.WriteLine("			set;");
                    sw.WriteLine("		}");
                }
                sw.WriteLine("	}");
                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。