/// <summary>
/// 设定批量模式下的搜索语句，继承的类应重载这个函数来指定自己批量模式的搜索语句，如果不指定则默认使用Ids.Contains(x.Id)来代替搜索语句中的Where条件
/// </summary>
/// <returns>搜索语句</returns>
public virtual IOrderedQueryable <TModel> GetBatchQuery()
{
var baseQuery = GetSearchQuery();
if (ReplaceWhere == null)
{
var mod = new WhereReplaceModifier <TModel>(Ids.GetContainIdExpression <TModel>());
var newExp = mod.Modify(baseQuery.Expression);
var newQuery = baseQuery.Provider.CreateQuery <TModel>(newExp) as IOrderedQueryable <TModel>;
return(newQuery);
}
else
{
return(baseQuery);
}
}
/// <summary>
/// 进行搜索
/// </summary>
public virtual void DoSearch()
{
var cmd = GetSearchCommand();
if (cmd == null)
{
IOrderedQueryable <TModel> query = null;
//根据搜索模式调用不同的函数
switch (SearcherMode)
{
case ListVMSearchModeEnum.Search:
query = GetSearchQuery();
break;
case ListVMSearchModeEnum.Export:
query = GetExportQuery();
break;
case ListVMSearchModeEnum.Batch:
query = GetBatchQuery();
break;
case ListVMSearchModeEnum.MasterDetail:
query = GetMasterDetailsQuery();
break;
case ListVMSearchModeEnum.CheckExport:
query = GetCheckedExportQuery();
break;
case ListVMSearchModeEnum.Selector:
query = GetSelectorQuery();
break;
default:
query = GetSearchQuery();
break;
}
//如果设定了替换条件，则使用替换条件替换Query中的Where语句
if (ReplaceWhere != null)
{
var mod = new WhereReplaceModifier <TopBasePoco>(ReplaceWhere);
var newExp = mod.Modify(query.Expression);
query = query.Provider.CreateQuery <TModel>(newExp) as IOrderedQueryable <TModel>;
}
if (Searcher.SortInfo != null)
{
var mod = new OrderReplaceModifier(Searcher.SortInfo);
var newExp = mod.Modify(query.Expression);
query = query.Provider.CreateQuery <TModel>(newExp) as IOrderedQueryable <TModel>;
}
if (typeof(TModel).IsSubclassOf(typeof(PersistPoco)))
{
var mod = new IsValidModifier();
var newExp = mod.Modify(query.Expression);
query = query.Provider.CreateQuery <TModel>(newExp) as IOrderedQueryable <TModel>;
}
if (PassSearch == false)
{
//如果需要分页，则添加分页语句
if (NeedPage && Searcher.Limit != -1)
{
//获取返回数据的数量
var count = query.Count();
if (count < 0)
{
count = 0;
}
if (Searcher.Limit == 0)
{
Searcher.Limit = GlobalConstants.DEFAULT_PAGESIZE;
}
//根据返回数据的数量，以及预先设定的每页行数来设定数据量和总页数
Searcher.Count = count;
Searcher.PageCount = (int)Math.Ceiling((1.0 * Searcher.Count / Searcher.Limit));
if (Searcher.Page <= 0)
{
Searcher.Page = 1;
}
if (Searcher.PageCount > 0 && Searcher.Page > Searcher.PageCount)
{
Searcher.Page = Searcher.PageCount;
}
EntityList = query.Skip((Searcher.Page - 1) * Searcher.Limit).Take(Searcher.Limit).AsNoTracking().ToList();
}
else //如果不需要分页则直接获取数据
{
EntityList = query.AsNoTracking().ToList();
Searcher.Count = EntityList.Count;
Searcher.Limit = EntityList.Count;
Searcher.PageCount = 1;
Searcher.Page = 1;
}
}
else
{
EntityList = query.AsNoTracking().ToList();
}
}
else
{
ProcessCommand(cmd);
}
IsSearched = true;
//调用AfterDoSearch函数来处理自定义的后续操作
AfterDoSearcher();
}