我正在使用jQuery测试自动完成功能,但是我无法显示正确的标签。当搜索只涉及1个字段或标准时,很简单:
var model = db.UserProfiles.Where(u => u.Department.Contains(term))
.Take(10).Select(r => new
{
label = r.Department
}).Distinct();
return Json(model, JsonRequestBehavior.AllowGet);
但是,如果我想处理多个搜索条件(即当用户输入searchTerm时,它将在表格中的任何位置查找匹配结果),例如:
var model = db.UserProfiles.Where(u => (u.FirstName + " " + u.LastName).Contains(term) || u.Department.Contains(term) ||
u.JobTitle.Contains(term) || u.PhoneNumber.Contains(term) || u.Extension.Contains(term) || u.Location.Contains(term))
.Take(10).Select(r => new
{
label = //How do I display the correct label here?
}).Distinct();
return Json(model, JsonRequestBehavior.AllowGet);
预期产出:
如果有人名“Terry”,并且表中还有一个名为“Technology”的部门,当用户输入“te”时,它应显示“Technology”和“Terry”
答案 0 :(得分:1)
你应该能够使用三元运算符在linq中模拟一个case语句,如下所示:
var model = db.UserProfiles.Select(r => new
{
label = (u.FirstName + " " + u.LastName).Contains(term) ? (u.FirstName + " " + u.LastName) :
u.Department.Contains(term) ? u.Department :
u.JobTitle.Contains(term) ? u.JobTitle :
u.PhoneNumber.Contains(term) ? u.PhoneNumber :
u.Extension.Contains(term) ? u.Extension :
u.Location.Contains(term) ? u.Location : null
}).Where(l => l != null).Distinct().Take(10);
return Json(model, JsonRequestBehavior.AllowGet);
答案 1 :(得分:1)
最好使用空白的字符串列表并逐个查找每个匹配的集合。
如果你想让它更具动态性,你可以使用一个使用.Concat
的交互过程,一个UserProfile类的meta属性和反射。
var model = (new List<string>())
.Concat(db.UserProfiles
.Where(u => (u.FirstName + " " + u.LastName).Contains(term))
.Select(u => (u.FirstName + " " + u.LastName))
.Distinct())
.Concat(db.UserProfiles
.Where(u => u.Department.Contains(term))
.Select(u => u.Department)
.Distinct())
.Concat(db.UserProfiles
.Where(u => u.JobTitle.Contains(term))
.Select(u => u.JobTitle)
.Distinct())
.Concat(db.UserProfiles
.Where(u => u.PhoneNumber.Contains(term))
.Select(u => u.PhoneNumber)
.Distinct())
.Concat(db.UserProfiles
.Where(u => u.Extension.Contains(term))
.Select(u => u.Extension)
.Distinct())
.Concat(db.UserProfiles
.Where(u => u.Location.Contains(term))
.Select(u => u.Location)
.Distinct())
.OrderBy( s => s )//must have an orderby in order to use Take
.Take(10)
.ToList();
return Json(model, JsonRequestBehavior.AllowGet);