public JsonActionResult <bool> AdjustIndex([FromUri] AdjustIndexParam param)
{
return(SafeExecute(() =>
{
return ProductService.AdjustIndex(param);
}));
}
public bool AdjustIndex(AdjustIndexParam param)
{
if (param == null || param.ID == null)
{
return(false);
}
var pointGoods = Repository.GetByKey(param.ID);
if (pointGoods == null)
{
return(false);
}
Product exchangeEntity = null;
if (param.Direction == EAdjustDirection.Up)
{
var pre = Repository.GetQueryable().Where(t => t.Index == (pointGoods.Index - 1)).FirstOrDefault();
if (pre == null)
{
return(true);
}
else
{
exchangeEntity = pre;
}
}
else if (param.Direction == EAdjustDirection.Down)
{
var next = Repository.GetQueryable().Where(t => t.Index == (pointGoods.Index + 1)).FirstOrDefault();
if (next == null)
{
return(true);
}
else
{
exchangeEntity = next;
}
}
if (exchangeEntity != null)
{
var exchangeIndex = exchangeEntity.Index;
exchangeEntity.Index = pointGoods.Index;
pointGoods.Index = exchangeIndex;
return(Repository.Update(new List <Product> {
exchangeEntity, pointGoods
}) == 2);
}
return(false);
}
