/// <summary>
/// 根据主键值读取记录。如果数据库不存在这条数据将返回null
/// </summary>
/// <param name="db">数据库操作对象</param>
/// <param name="columns">需要返回的列，不提供任何列名时默认将返回所有列</param>
public MemSysMsgEntity GetSysMsg(int id)
{
string sql = @"SELECT [Id],[MemId],[MsgContent],[HasRead],[CreateTime],[ReadTime]
FROM
dbo.[SysMsg] WITH(NOLOCK)
WHERE [Id]=@id" ;
DbCommand cmd = db.GetSqlStringCommand(sql);
db.AddInParameter(cmd, "@Id", DbType.Int32, id);
MemSysMsgEntity entity = new MemSysMsgEntity();
using (IDataReader reader = db.ExecuteReader(cmd))
{
if (reader.Read())
{
entity.Id = StringUtils.GetDbInt(reader["Id"]);
entity.MemId = StringUtils.GetDbInt(reader["MemId"]);
entity.MsgContent = StringUtils.GetDbString(reader["MsgContent"]);
entity.HasRead = StringUtils.GetDbInt(reader["HasRead"]);
entity.CreateTime = StringUtils.GetDbDateTime(reader["CreateTime"]);
entity.ReadTime = StringUtils.GetDbDateTime(reader["ReadTime"]);
}
}
return(entity);
}
/// <summary>
/// 判断当前节点是否已存在相同的
/// </summary>
/// <param name="entity"></param>
/// <returns></returns>
public int ExistNum(MemSysMsgEntity entity)
{
///id=0,判断总数，ID>0判断除自己之外的总数
string sql = @"Select count(1) from dbo.[SysMsg] WITH(NOLOCK) ";
string where = "where ";
if (entity.Id == 0)
{
}
else
{
}
sql = sql + where;
DbCommand cmd = db.GetSqlStringCommand(sql);
if (entity.Id > 0)
{
db.AddInParameter(cmd, "@Id", DbType.Int32, entity.Id);
}
object identity = db.ExecuteScalar(cmd);
if (identity == null || identity == DBNull.Value)
{
return(0);
}
return(Convert.ToInt32(identity));
}
/// <summary>
/// 根据主键值更新记录的全部字段（注意：该方法不会对自增字段、timestamp类型字段以及主键字段更新！如果要更新主键字段，请使用Update方法）。
/// 如果数据库有数据被更新了则返回True，否则返回False
/// </summary>
/// <param name="db">数据库操作对象</param>
/// <param name="sysMsg">待更新的实体对象</param>
public int UpdateSysMsg(MemSysMsgEntity entity)
{
string sql = @" UPDATE dbo.[SysMsg] SET
[MemId]=@MemId,[MsgContent]=@MsgContent,[HasRead]=@HasRead,[CreateTime]=@CreateTime,[ReadTime]=@ReadTime
WHERE [Id]=@id";
DbCommand cmd = db.GetSqlStringCommand(sql);
db.AddInParameter(cmd, "@Id", DbType.Int32, entity.Id);
db.AddInParameter(cmd, "@MemId", DbType.Int32, entity.MemId);
db.AddInParameter(cmd, "@MsgContent", DbType.String, entity.MsgContent);
db.AddInParameter(cmd, "@HasRead", DbType.Int32, entity.HasRead);
db.AddInParameter(cmd, "@CreateTime", DbType.DateTime, entity.CreateTime);
db.AddInParameter(cmd, "@ReadTime", DbType.DateTime, entity.ReadTime);
return(db.ExecuteNonQuery(cmd));
}
/// <summary>
/// 插入一条记录到表SysMsg，如果表中存在自增字段，则返回值为新记录的自增字段值，否则返回0。
/// 该方法提供给界面等UI层调用
/// </summary>
/// <param name="sysMsg">要添加的SysMsg数据实体对象</param>
public int AddSysMsg(MemSysMsgEntity sysMsg)
{
if (sysMsg.Id > 0)
{
return(UpdateSysMsg(sysMsg));
}
else if (SysMsgBLL.Instance.IsExist(sysMsg))
{
return((int)CommonStatus.ADD_Fail_Exist);
}
else
{
return(MemSysMsgDA.Instance.AddSysMsg(sysMsg));
}
}
/// <summary>
/// 读取记录列表。
/// </summary>
/// <param name="db">数据库操作对象</param>
/// <param name="columns">需要返回的列，不提供任何列名时默认将返回所有列</param>
public IList <MemSysMsgEntity> GetSysMsgList(int pagesize, int pageindex, ref int recordCount)
{
string sql = @"SELECT [Id],[MemId],[MsgContent],[HasRead],[CreateTime],[ReadTime]
FROM
(SELECT ROW_NUMBER() OVER (ORDER BY Id desc) AS ROWNUMBER,
[Id],[MemId],[MsgContent],[HasRead],[CreateTime],[ReadTime] from dbo.[SysMsg] WITH(NOLOCK)
WHERE 1=1 ) as temp
where rownumber BETWEEN ((@PageIndex - 1) * @PageSize + 1) AND @PageIndex * @PageSize" ;
string sql2 = @"Select count(1) from dbo.[SysMsg] with (nolock) ";
IList <MemSysMsgEntity> entityList = new List <MemSysMsgEntity>();
DbCommand cmd = db.GetSqlStringCommand(sql);
db.AddInParameter(cmd, "@PageIndex", DbType.Int32, pageindex);
db.AddInParameter(cmd, "@PageSize", DbType.Int32, pagesize);
using (IDataReader reader = db.ExecuteReader(cmd))
{
while (reader.Read())
{
MemSysMsgEntity entity = new MemSysMsgEntity();
entity.Id = StringUtils.GetDbInt(reader["Id"]);
entity.MemId = StringUtils.GetDbInt(reader["MemId"]);
entity.MsgContent = StringUtils.GetDbString(reader["MsgContent"]);
entity.HasRead = StringUtils.GetDbInt(reader["HasRead"]);
entity.CreateTime = StringUtils.GetDbDateTime(reader["CreateTime"]);
entity.ReadTime = StringUtils.GetDbDateTime(reader["ReadTime"]);
entityList.Add(entity);
}
}
cmd = db.GetSqlStringCommand(sql2);
using (IDataReader reader = db.ExecuteReader(cmd))
{
if (reader.Read())
{
recordCount = StringUtils.GetDbInt(reader[0]);
}
else
{
recordCount = 0;
}
}
return(entityList);
}
/// <summary>
/// 插入一条记录到表SysMsg，如果表中存在自增字段，则返回值为新记录的自增字段值，否则返回0
/// </summary>
/// <param name="db">数据库操作对象</param>
/// <param name="sysMsg">待插入的实体对象</param>
public int AddSysMsg(MemSysMsgEntity entity)
{
string sql = @"insert into MemSysMsg( [MemId],[MsgContent],[HasRead],[CreateTime],[ReadTime])VALUES
( @MemId,@MsgContent,@HasRead,@CreateTime,@ReadTime);
SELECT SCOPE_IDENTITY();" ;
DbCommand cmd = db.GetSqlStringCommand(sql);
db.AddInParameter(cmd, "@MemId", DbType.Int32, entity.MemId);
db.AddInParameter(cmd, "@MsgContent", DbType.String, entity.MsgContent);
db.AddInParameter(cmd, "@HasRead", DbType.Int32, entity.HasRead);
db.AddInParameter(cmd, "@CreateTime", DbType.DateTime, entity.CreateTime);
db.AddInParameter(cmd, "@ReadTime", DbType.DateTime, entity.ReadTime);
object identity = db.ExecuteScalar(cmd);
if (identity == null || identity == DBNull.Value)
{
return(0);
}
return(Convert.ToInt32(identity));
}
/// <summary>
/// 读取记录列表。
/// </summary>
/// <param name="db">数据库操作对象</param>
/// <param name="columns">需要返回的列，不提供任何列名时默认将返回所有列</param>
public IList <MemSysMsgEntity> GetSysMsgAll()
{
string sql = @"SELECT [Id],[MemId],[MsgContent],[HasRead],[CreateTime],[ReadTime] from dbo.[SysMsg] WITH(NOLOCK) ";
IList <MemSysMsgEntity> entityList = new List <MemSysMsgEntity>();
DbCommand cmd = db.GetSqlStringCommand(sql);
using (IDataReader reader = db.ExecuteReader(cmd))
{
while (reader.Read())
{
MemSysMsgEntity entity = new MemSysMsgEntity();
entity.Id = StringUtils.GetDbInt(reader["Id"]);
entity.MemId = StringUtils.GetDbInt(reader["MemId"]);
entity.MsgContent = StringUtils.GetDbString(reader["MsgContent"]);
entity.HasRead = StringUtils.GetDbInt(reader["HasRead"]);
entity.CreateTime = StringUtils.GetDbDateTime(reader["CreateTime"]);
entity.ReadTime = StringUtils.GetDbDateTime(reader["ReadTime"]);
entityList.Add(entity);
}
}
return(entityList);
}
/// <summary>
/// 更新一条SysMsg记录。
/// 该方法提供给界面等UI层调用
/// </summary>
/// <param name="sysMsg">待更新的实体对象</param>
/// <param name="columns">要更新的列名，不提供任何列名时默认将更新主键之外的所有列</param>
public int UpdateSysMsg(MemSysMsgEntity sysMsg)
{
return(MemSysMsgDA.Instance.UpdateSysMsg(sysMsg));
}
/// <summary>
/// 判断对象是否存在
/// </summary>
/// <param name="dicEnum"></param>
/// <returns></returns>
public bool IsExist(MemSysMsgEntity sysMsg)
{
return(MemSysMsgDA.Instance.ExistNum(sysMsg) > 0);
}