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- using Microsoft.Practices.EnterpriseLibrary.Data;
- using ProjectBase.Data.Logs;
- using ProjectBase.Data.Pager;
- using System;
- using System.Collections;
- using System.Collections.Generic;
- using System.Data;
- using System.Data.Common;
- using System.Data.SqlClient;
- using System.Linq;
- using System.Text;
- using System.Threading.Tasks;
- namespace ProjectBase.Data.BaseDAL.BaseDatabase
- {
- /// <summary>
- /// 数据访问层的基类
- /// </summary>
- public abstract class BaseDALSQL<T> : AbstractBaseDAL<T>, IBaseDAL<T> where T : BaseEntity, new()
- {
- #region 构造函数
- /// <summary>
- /// 默认构造函数
- /// </summary>
- public BaseDALSQL()
- { }
- /// <summary>
- /// 指定表名以及主键,对基类进构造
- /// </summary>
- /// <param name="tableName">表名</param>
- /// <param name="primaryKey">表主键</param>
- public BaseDALSQL(string tableName, string primaryKey)
- : base(tableName, primaryKey)
- {
- base.parameterPrefix = "@"; //数据库参数化访问的占位符
- base.safeFieldFormat = "[{0}]"; //防止和保留字、关键字同名的字段格式,如[value]
- }
- #endregion
- #region 通用操作方法
- /// <summary>
- /// 添加记录
- /// </summary>
- /// <param name="recordField">Hashtable:键[key]为字段名;值[value]为字段对应的值</param>
- /// <param name="targetTable">需要操作的目标表名称</param>
- /// <param name="trans">事务对象,如果使用事务,传入事务对象,否则为Null不使用事务</param>
- public override int Insert2(Hashtable recordField, string targetTable, DbTransaction trans)
- {
- int result = -1;
- string fields = ""; // 字段名
- string vals = ""; // 字段值
- if (recordField == null || recordField.Count < 1)
- {
- return result;
- }
- SqlParameter[] param = new SqlParameter[recordField.Count];
- IEnumerator eKeys = recordField.Keys.GetEnumerator();
- int i = 0;
- while (eKeys.MoveNext())
- {
- string field = eKeys.Current.ToString();
- fields += field + ",";
- vals += string.Format("@{0},", field);
- object val = recordField[eKeys.Current.ToString()];
- param[i] = new SqlParameter("@" + field, val);
- i++;
- }
- fields = fields.Trim(',');//除去前后的逗号
- vals = vals.Trim(',');//除去前后的逗号
- string sql = string.Format("INSERT INTO {0} ({1}) VALUES ({2});SELECT SCOPE_IDENTITY()", targetTable, fields, vals);
- Database db = CreateDatabase();
- DbCommand command = db.GetSqlStringCommand(sql);
- foreach (string field in recordField.Keys)
- {
- object val = recordField[field];
- val = val ?? DBNull.Value;
- if (val is DateTime)
- {
- if (Convert.ToDateTime(val) <= Convert.ToDateTime("1753-1-1"))
- {
- val = DBNull.Value;
- }
- }
- db.AddInParameter(command, field, TypeToDbType(val.GetType()), val);
- }
- if (trans != null)
- {
- result = Convert.ToInt32(db.ExecuteScalar(command, trans).ToString());
- }
- else
- {
- result = Convert.ToInt32(db.ExecuteScalar(command).ToString());
- }
- return result;
- }
- /// <summary>
- /// 测试数据库是否正常连接
- /// </summary>
- public override bool TestConnection(string connectionString)
- {
- bool result = false;
- using (DbConnection connection = new SqlConnection(connectionString))
- {
- connection.Open();
- if (connection.State == System.Data.ConnectionState.Open)
- {
- result = true;
- }
- }
- return result;
- }
- #endregion
- #region 对象添加、修改、查询接口
- /// <summary>
- /// 查找记录表中最旧的一条记录
- /// </summary>
- /// <param name="trans">事务对象</param>
- /// <returns></returns>
- public override T FindFirst(DbTransaction trans = null)
- {
- string sql = string.Format("Select top 1 {0} From {1} Order by {2} ASC", selectedFields, tableName, GetSafeFileName(sortField));
- Database db = CreateDatabase();
- DbCommand command = db.GetSqlStringCommand(sql);
- T entity = GetEntity(db, command, trans);
- return entity;
- }
- /// <summary>
- /// 查找记录表中最新的一条记录
- /// </summary>
- /// <param name="trans">事务对象</param>
- /// <returns></returns>
- public override T FindLast(DbTransaction trans = null)
- {
- string sql = string.Format("Select top 1 {0} From {1} Order by {2} DESC", selectedFields, tableName, GetSafeFileName(sortField));
- Database db = CreateDatabase();
- DbCommand command = db.GetSqlStringCommand(sql);
- T entity = GetEntity(db, command, trans);
- return entity;
- }
- #region 下面两个覆盖基类函数,指定具体的数据库类型
- /// <summary>
- /// 根据条件查询数据库,并返回对象集合(用于分页数据显示)
- /// </summary>
- /// <param name="condition">查询的条件</param>
- /// <param name="info">分页实体</param>
- /// <param name="fieldToSort">排序字段</param>
- /// <param name="desc">是否降序</param>
- /// <param name="trans">事务对象</param>
- /// <returns>指定对象的集合</returns>
- public override List<T> FindWithPager(string condition, PagerInfo info, string fieldToSort, bool desc, DbTransaction trans = null)
- {
- if (HasInjectionData(condition))
- {
- LogHelper.log.Error(string.Format("检测出SQL注入的恶意数据, {0}", condition));
- throw new Exception("检测出SQL注入的恶意数据");
- }
- PagerHelper helper = new PagerHelper(tableName, this.selectedFields, fieldToSort,
- info.PageSize, info.CurrenetPageIndex, desc, condition);
- string countSql = helper.GetPagingSql(DatabaseType.SqlServer, true);
- string strCount = SqlValueList(countSql, trans);
- info.RecordCount = Convert.ToInt32(strCount);
- string dataSql = helper.GetPagingSql(DatabaseType.SqlServer, false);
- List<T> list = GetList(dataSql, null, trans);
- return list;
- }
- /// <summary>
- /// 根据条件查询数据库,并返回DataTable集合(用于分页数据显示)
- /// </summary>
- /// <param name="condition">查询的条件</param>
- /// <param name="info">分页实体</param>
- /// <param name="fieldToSort">排序字段</param>
- /// <param name="desc">是否降序</param>
- /// <param name="trans">事务对象</param>
- /// <returns>指定DataTable的集合</returns>
- public override DataTable FindToDataTable(string condition, PagerInfo info, string fieldToSort, bool desc, DbTransaction trans = null)
- {
- if (HasInjectionData(condition))
- {
- LogHelper.log.Error(string.Format("检测出SQL注入的恶意数据, {0}", condition));
- throw new Exception("检测出SQL注入的恶意数据");
- }
- PagerHelper helper = new PagerHelper(tableName, this.selectedFields, fieldToSort,
- info.PageSize, info.CurrenetPageIndex, desc, condition);
- string countSql = helper.GetPagingSql(DatabaseType.SqlServer, true);
- string strCount = SqlValueList(countSql, trans);
- info.RecordCount = Convert.ToInt32(strCount);
- string dataSql = helper.GetPagingSql(DatabaseType.SqlServer, false);
- return GetDataTableBySql(dataSql, trans);
- }
- #endregion
- /// <summary>
- /// 获取前面记录指定数量的记录
- /// </summary>
- /// <param name="sql">查询语句</param>
- /// <param name="count">指定数量</param>
- /// <param name="orderBy">排序条件,例如order by id</param>
- /// <param name="trans">事务对象</param>
- /// <returns></returns>
- public override DataTable GetTopResult(string sql, int count, string orderBy, DbTransaction trans = null)
- {
- string resultSql = string.Format("select top {0} * from ({1} {2}) ", count, sql, orderBy);
- return SqlTable(resultSql, trans);
- }
- #endregion
- #region 特殊的操作
- /// <summary>
- /// 兼容Oracle的字段大写的重写函数
- /// </summary>
- /// <param name="sql">sql语句</param>
- /// <param name="trans">事务对象</param>
- /// <returns></returns>
- public override DataTable SqlTable(string sql, DbTransaction trans = null)
- {
- return base.SqlTable(sql.ToUpper(), trans);
- }
- /// <summary>
- /// 兼容Oracle的字段大写的重写函数
- /// </summary>
- /// <param name="sql">sql语句</param>
- /// <param name="parameters">SQL参数集合</param>
- /// <param name="trans">事务对象</param>
- /// <returns></returns>
- public override DataTable SqlTable(string sql, DbParameter[] parameters, DbTransaction trans = null)
- {
- return base.SqlTable(sql.ToUpper(), parameters, trans);
- }
- /// <summary>
- /// 获取数据库的全部表名称
- /// </summary>
- /// <returns></returns>
- public override List<string> GetTableNames()
- {
- string sql = string.Format("SELECT name FROM sysobjects WHERE (xtype = 'U') order by name");
- Database db = CreateDatabase();
- DbCommand command = db.GetSqlStringCommand(sql);
- List<string> list = new List<string>();
- using (IDataReader dr = db.ExecuteReader(command))
- {
- while (dr.Read())
- {
- list.Add(dr[0].ToString());
- }
- }
- return list;
- }
- #endregion
- }
- }
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