entity framework(EF) 直接执行数据库命令并返回DataTable

 //调用方法
         private void button1_Click(object sender, EventArgs e)
         {
             string id = "1";
             string sql = "select * from table1 where id = @id";

             #region mysql数据库参数类型
             var args = new DbParameter[] {
                                       new SqlParameter { ParameterName = "id", Value = id},
                                   };
             #endregion

             #region mysql数据库参数类型
             //var args = new DbParameter[] {
             //                          new OdbcParameter { ParameterName = "id", Value = id},
             //                      };
             #endregion

             #region access数据库参数类型
             //var args = new DbParameter[] {
             //                          new OleDbParameter { ParameterName = "id", Value = id},
             //                      };
             #endregion
             MessageBox.Show(SqlQuery(sql, args).Count().ToString());
         }
         ///
         /// 执行带参数sql语句返回数据列表
         ///
         /// 泛型
         /// sql语句
         /// 参数
         /// 数据列表
         public List SqlQuery(string sql, DbParameter[] args)
         {
             if (string.IsNullOrEmpty(sql))
                 return new List();
             try
             {
                 using (itlogo_integralEntities db = new itlogo_integralEntities())
                 {
                     return db.Database.SqlQuery(sql, args).ToList();
                 }
             }
             catch (Exception ex)
             {
                 return new List();
             }
         }
         ///
         /// 执行不带参数sql语句返回数据列表
         ///
         ///
         ///
         ///
         public static List SqlQuery(string sql)
         {
             if (string.IsNullOrEmpty(sql))
                 return new List();
             try
             {
                 using (itlogo_integralEntities db = new itlogo_integralEntities())
                 {
                     return db.Database.SqlQuery(sql).ToList();
                 }
             }
             catch (Exception ex)
             {
                 return new List();
             }
         }
         ///
         /// 执行带参数sql语句返回受影响行数
         ///
         ///
         ///
         ///
         public static int ExecuteSqlCommand(string sql, DbParameter[] args)
         {
             if (string.IsNullOrEmpty(sql))
                 return 0;
             try
             {
                 using (itlogo_integralEntities db = new itlogo_integralEntities())
                 {
                     return db.Database.ExecuteSqlCommand(sql, args);
                 }
             }
             catch (Exception ex)
             {
                 return 0;
             }
         }
         ///
         /// 执行sql语句返回收影响行数
         ///
         ///
         ///
         public static int ExecuteSqlCommand(string sql)
         {
             if (string.IsNullOrEmpty(sql))
                 return 0;
             try
             {
                 using (itlogo_integralEntities db = new itlogo_integralEntities())
                 {
                     return db.Database.ExecuteSqlCommand(sql);
                 }
             }
             catch (Exception ex)
             {
                 return 0;
             }
         }

执行sql语句返回datatable

 #region 执行sql语句返回datatable

         public DataTable SqlQueryForDataTatable(Database database, string sql)
         {

             SqlConnection conn = new System.Data.SqlClient.SqlConnection();
             conn.ConnectionString = database.Connection.ConnectionString;
             if (conn.State != ConnectionState.Open)
             {
                 conn.Open();
             }

             SqlCommand cmd = new SqlCommand();
             cmd.Connection = conn;
             cmd.CommandText = sql;

             SqlDataAdapter adapter = new SqlDataAdapter(cmd);
             DataTable table = new DataTable();
             adapter.Fill(table);

             conn.Close();//连接需要关闭
             conn.Dispose();
             return table;
         }

         public DataTable SqlQueryForDataTatable(Database database, string sql, DbParameter[] parameters)
         {
             SqlConnection conn = new System.Data.SqlClient.SqlConnection();
             conn.ConnectionString = database.Connection.ConnectionString;
             if (conn.State != ConnectionState.Open)
             {
                 conn.Open();
             }
             SqlCommand cmd = new SqlCommand();
             cmd.Connection = conn;
             cmd.CommandText = sql;

             if (parameters != null && parameters.Length > 0)
             {
                 foreach (var item in parameters)
                 {
                     cmd.Parameters.Add(item);
                 }
             }

             SqlDataAdapter adapter = new SqlDataAdapter(cmd);
             DataTable table = new DataTable();
             adapter.Fill(table);
             return table;
         }
         #endregion

参考网址：

直接执行数据库命令

http://www.cnblogs.com/mend/archive/2012/06/11/2544599.html

使用dynamic linq 解决自定义查询的若干弊端

http://www.cnblogs.com/sword-successful/p/3318540.html

MVC3+EF4.1学习系列(十一)----EF4.1常见的问题解决（返回datatable）

http://www.cnblogs.com/wlflovenet/archive/2011/12/30/EF11.html