Question

我有两个查询，它们都有效但需要将它们合并为一个有效的查询

查询1

  var now = DateTime.Now;
  var twoWeeksAgo = now.AddDays(-14);

  var advert =
      from m in db.tbl_Property
      where m.Prop_Update >= twoWeeksAgo && m.Prop_Update <= now
      select m;

查询2

  var Props = 
      from n in db.tbl_Property.
      Where(c => c.Prop_AvailableSpaces > 0)
      select n;

欢迎任何帮助或建议

Answer 1

我会将这些查询更改为传入原始IQueryable<Property>（或任何类型），然后您可以执行以下操作：

var advert = from m in source
             where m.Prop_Update >= twoWeeksAgo && m.Prop_Update <= now
             select m;

将db.tbl_Property作为source传递，然后：

var Props = from n in filteredProperties
            where n.Prop_AvailableSpaces > 0
            select n;

即。组合物

Answer 2

你的意思是：

var now = DateTime.Now;
var twoWeeksAgo = now.AddDays(-14);

var advert = db.tbl_Property
               .Where(m => m.Prop_Update >= twoWeeksAgo && m.Prop_Update <= now
                           && m.Prop_AvailableSpaces > 0);

或者也许与||结合代替：

var advert = db.tbl_Property
               .Where(m => (m.Prop_Update >= twoWeeksAgo && m.Prop_Update <= now)
                           || m.Prop_AvailableSpaces > 0);

（请注意，我没有在这里使用查询表达式，因为您只使用单个where子句。）

Answer 3

也许是这样的：

var advert =
            from m in db.tbl_Property
            where 
                (m.Prop_Update >= twoWeeksAgo && m.Prop_Update <= now)
                || (m.Prop_AvailableSpaces > 0)

            select m;

Answer 4

     var advert = db.tbl_Property.Where(m => m.Prop_Update >= twoWeeksAgo 
     && m.Prop_Update <= now && m.Prop_AvailableSpaces > 0);

将两个查询合并为一个查询

4 个答案: