/// <summary>
/// 从IIS缓存中获取指定Id记录
/// </summary>
/// <param name="id">主键Id</param>
/// <returns>DataAccess.Model.TEST</returns>
public DataAccess.Model.TEST GetModelForCache(long id)
{
try
{
//从缓存中读取指定Id记录
var model = GetModelForCache(x => x.Id == id);
if (model == null)
{
//从数据库中读取
var tem = TEST.SingleOrDefault(x => x.Id == id);
if (tem == null)
{
return(null);
}
else
{
//对查询出来的实体进行转换
model = Transform(tem);
return(model);
}
}
else
{
return(model);
}
}
catch (Exception e)
{
//记录日志
CommonBll.WriteLog("从IIS缓存中获取TEST表记录时出现异常", e);
return(null);
}
}
/// <summary>
/// 获取指定Id记录
/// </summary>
/// <param name="id">主键Id</param>
/// <param name="isCache">是否从缓存中读取</param>
/// <returns>DataAccess.Model.TEST</returns>
public DataAccess.Model.TEST GetModel(long id, bool isCache = true)
{
//判断是否使用缓存
if (CommonBll.IsUseCache() && isCache)
{
//从缓存中获取List
var list = GetList();
if (list == null)
{
return(null);
}
else
{
//在List查询指定主键Id的记录
return(list.SingleOrDefault(x => x.Id == id));
}
}
else
{
//从数据库中直接读取
var model = TEST.SingleOrDefault(x => x.Id == id);
if (model == null)
{
return(null);
}
else
{
//对查询出来的实体进行转换
return(Transform(model));
}
}
}
/// <summary>
/// 从IIS缓存中获取指定Id记录
/// </summary>
/// <param name="conditionColName">条件列名</param>
/// <param name="value">条件值</param>
/// <returns>DataAccess.Model.TEST</returns>
public DataAccess.Model.TEST GetModelForCache(string conditionColName, object value)
{
try
{
//从缓存中获取List
var list = GetList();
DataAccess.Model.TEST model = null;
Expression <Func <TEST, bool> > expression = null;
//返回指定条件的实体
switch (conditionColName)
{
case "Id":
model = list.SingleOrDefault(x => x.Id == (int)value);
expression = x => x.Id == (int)value;
break;
case "COL1":
model = list.SingleOrDefault(x => x.COL1 == (string)value);
expression = x => x.COL1 == (string)value;
break;
case "COL2":
model = list.SingleOrDefault(x => x.COL2 == (string)value);
expression = x => x.COL2 == (string)value;
break;
case "COL3":
model = list.SingleOrDefault(x => x.COL3 == (string)value);
expression = x => x.COL3 == (string)value;
break;
case "COL4":
model = list.SingleOrDefault(x => x.COL4 == (int)value);
expression = x => x.COL4 == (int)value;
break;
default:
return(null);
}
if (model == null)
{
//从数据库中读取
var tem = TEST.SingleOrDefault(expression);
if (tem == null)
{
return(null);
}
else
{
//对查询出来的实体进行转换
model = Transform(tem);
return(model);
}
}
else
{
return(model);
}
}
catch (Exception e)
{
//记录日志
CommonBll.WriteLog("从IIS缓存中获取TEST表记录时出现异常", e);
return(null);
}
}