/// <summary>
/// 把Expression列表转化为单一Expression（use and）
/// </summary>
/// <param name="exps"></param>
/// <returns></returns>
public static ISearchExpression ConvertListToOne(IList <ISearchExpression> exps)
{
if (exps.Count == 0)
{
return(null);
}
ISearchExpression exp = exps[0];
for (int i = 1; i < exps.Count; ++i)
{
exp = SearchExpression.And(exp, exps[i]);
}
return(exp);
}
/// <summary>
/// List To One
/// </summary>
/// <param name="searchExpressions"></param>
/// <returns></returns>
public static ISearchExpression ToSingle(IList <ISearchExpression> searchExpressions)
{
if (searchExpressions == null || searchExpressions.Count == 0)
{
return(null);
}
ISearchExpression se = searchExpressions[0];
for (int i = 1; i < searchExpressions.Count; ++i)
{
se = SearchExpression.And(se, searchExpressions[i]);
}
return(se);
}
/// <summary>
///
/// </summary>
/// <param name="sm"></param>
/// <param name="searchExpression"></param>
/// <param name="searchOrders"></param>
public static void FillSearchAdditionals(this ISearchManager sm, ref ISearchExpression searchExpression, ref IList <ISearchOrder> searchOrders)
{
if (!string.IsNullOrEmpty(sm.AdditionalSearchExpression))
{
searchExpression = SearchExpression.And(searchExpression,
SearchExpression.Parse(sm.AdditionalSearchExpression));
}
if (!string.IsNullOrEmpty(sm.AdditionalSearchOrder))
{
if (searchOrders == null)
{
searchOrders = new List <ISearchOrder>();
}
foreach (var i in SearchOrder.Parse(sm.AdditionalSearchOrder))
{
searchOrders.Add(i);
}
}
}