MySQL生成模型

根据数据库表生成Model

using System;
using System.Collections.Generic;
using System.Data;
using System.Text;
using MySql.Data.MySqlClient;

namespace ClassLibrary
{
    /// <summary>
    /// 生成模型
    /// </summary>
    public static class GenerativeModel
    {
        #region 获取服务器所有库 MySQL_GetDBs
        /// <summary>
        /// 获取服务器所有库
        /// </summary>
        /// <param name="connStr">连接字符串</param>
        /// <returns></returns>
        public static List<string> MySQL_GetDBs(string connStr)
        {
            return GetListString(connStr, "SHOW DATABASES");
        }
        #endregion

        #region 获取数据库所有表 MySQL_GetTables
        /// <summary>
        /// 获取数据库所有表
        /// </summary>
        /// <param name="connStr">连接字符串</param>
        /// <returns></returns>
        public static List<string> MySQL_GetTables(string connStr)
        {
            return GetListString(connStr, "SHOW TABLES");
        }
        #endregion

        #region 获取MySQL实体类 MySQL_GetModel
        #region 获取MySQL实体类
        /// <summary>
        /// 获取MySQL实体类
        /// </summary>
        /// <param name="connStr">连接字符串</param>
        /// <param name="tableName">表名</param>
        /// <param name="modelName">生成模型名</param>
        /// <param name="spaceName">模型命名空间名</param>
        /// <returns></returns>
        public static string MySQL_GetModel(string connStr, string tableName, string modelName, string spaceName)
        {
            try
            {
                List<MySQLTable> ls = MySQLHelp.GetList<MySQLTable>(connStr, "SHOW FULL FIELDS FROM " + tableName);
                StringBuilder sb = new StringBuilder();
                sb.Append("using System;\nusing System.Collections.Generic;\n");//引用基础类库
                sb.AppendFormat("namespace {0}", spaceName).Append("\n{\n");//命名空间
                sb.AppendFormat("\tpublic class {0}", modelName).Append("\n\t{\n");//类
                foreach (var item in ls)
                {
                    sb.AppendFormat("\t\t///<summary>\n\t\t///{0}\n\t\t///</summary>\n", item.Comment);//注释
                    string field = item.Field.Substring(0, 1).ToUpper() + item.Field.Substring(1);//字段名
                    sb.AppendFormat("\t\tpublic {0} {1} ", typeConvert(item.Type), field).Append("{get;set;}\n");//添加属性
                }
                sb.Append("\t}\n}");
                return sb.ToString();
            }
            catch (System.Exception)
            {
            }
            return null;
        }
        #endregion

        #region MySQL类型转换成C#类型
        private static string typeConvert(string type)
        {
            type = type.ToLower();
            if (type.StartsWith("varchar") || type.StartsWith("char") || type.StartsWith("enum"))
            {
                return "string";
            }
            if (type.StartsWith("date") || type.StartsWith("datetime"))
            {
                return "DateTime";
            }
            if (type.StartsWith("int") || type.StartsWith("tinyint") || type.StartsWith("smallint") || type.StartsWith("mediumint"))
            {
                return "int";
            };
            if (type.StartsWith("bigint"))
            {
                return "long";
            };
            if (type.StartsWith("double") || type.StartsWith("float"))
            {
                return "double";
            }
            if (type.StartsWith("decimal"))
            {
                return "decimal";
            }
            return "[类型]";
        }
        #endregion

        #region 表结构
        public class MySQLTable
        {
            /// <summary>
            /// 字段名
            /// </summary>
            public string Field { get; set; }
            /// <summary>
            /// 字段类型
            /// </summary>
            public string Type { get; set; }
            /// <summary>
            /// 
            /// </summary>
            public string Collation { get; set; }
            /// <summary>
            /// 是否可为null
            /// </summary>
            public string Null { get; set; }
            /// <summary>
            /// 
            /// </summary>
            public string Key { get; set; }
            /// <summary>
            /// 默认值
            /// </summary>
            public string Default { get; set; }
            /// <summary>
            /// 
            /// </summary>
            public string Extra { get; set; }
            /// <summary>
            /// 
            /// </summary>
            public string Privileges { get; set; }
            /// <summary>
            /// 备注
            /// </summary>
            public string Comment { get; set; }

        }
        #endregion
        #endregion

        #region 获取DataReader
        /// <summary>
        /// 获取DataReader
        /// </summary>
        /// <param name="connStr">数据库连接字符串</param>
        /// <param name="comText">SQL语句</param>
        /// <returns>DataReader</returns>
        public static MySqlDataReader ExecuteDataReader(string connStr, string comText)
        {
            MySqlConnection conn = new MySqlConnection(connStr);
            MySqlCommand com = new MySqlCommand();
            if (conn.State == ConnectionState.Closed) { conn.Open(); }
            com.Connection = conn;
            com.CommandType = CommandType.Text;
            com.CommandText = comText;
            return com.ExecuteReader(CommandBehavior.CloseConnection);
        }
        #endregion

        #region 获取List<string>
        /// <summary>
        /// 获取List
        /// </summary>
        /// <param name="connStr">数据库连接字符串</param>
        /// <param name="comText">SQL语句</param>
        /// <returns></returns>
        private static List<string> GetListString(string connStr, string cmdText)
        {
            try
            {
                List<string> ls = new List<string>();
                MySqlDataReader read = ExecuteDataReader(connStr, cmdText);
                while (read.Read())
                {
                    for (int i = 0; i < read.FieldCount; i++)
                    {
                        if (read[i] != DBNull.Value)
                        {
                            ls.Add(read[i].ToString());
                        }
                    }
                }
                return ls;
            }
            catch (System.Exception)
            {
                return null;
            }
        }
        #endregion

        #region 获取List<T>
        /// <summary>
        /// 获取List
        /// </summary>
        /// <typeparam name="T">类型</typeparam>
        /// <param name="connStr">数据库连接字符串</param>
        /// <param name="comText">SQL语句</param>
        /// <returns></returns>
        public static List<T> GetList<T>(string connStr, string comText) where T : class,new()
        {
            MySqlDataReader read = ExecuteDataReader(connStr, comText);
            List<T> ls = (read.HasRows ? new List<T>() : null);//是否有数据
            while (read.Read())
            {
                Type type = typeof(T);//获取类型
                T t = new T();//创建实例
                foreach (var item in type.GetProperties())//取出属性
                {
                    for (int i = 0; i < read.FieldCount; i++)
                    {
                        if (item.Name.ToLower() == read.GetName(i).ToLower() && read[i] != DBNull.Value)//属性名与查询出来的列名比较,且至不能为null
                        {
                            item.SetValue(t, read[i], null);
                            break;
                        }
                    }
                }
                ls.Add(t);
            };
            return ls;
        }
        #endregion
    }
}