Question

我正在尝试对联系人列表运行查询，并使用给定的字符串过滤器对其进行过滤。代码如下：

var query = Session.QueryOver<CrmContact>()
                .Where(x => x.Account.ID == account.ID && x.IsActive && x.IsContact);    

query.And(Restrictions.Disjunction()
  .Add(Restrictions.InsensitiveLike(Projections.Property<CrmContact>(c => c.FirstName), filtString, MatchMode.Anywhere))
  .Add(Restrictions.InsensitiveLike(Projections.Property<CrmContact>(c => c.LastName), filtString, MatchMode.Anywhere))
  .Add(Restrictions.InsensitiveLike(Projections.Property<CrmContact>(c => c.Email), filtString, MatchMode.Anywhere))
  .Add(Restrictions.InsensitiveLike(Projections.Property<CrmContact>(c => c.Company), filtString))
  .Add(Restrictions.InsensitiveLike(Projections.Property<CrmContact>(c => c.Phone.Substring(0, 3)), filtString, MatchMode.Anywhere))
  .Add(Restrictions.InsensitiveLike(Projections.Property<CrmContact>(c => c.Phone.Substring(3, 3)), filtString, MatchMode.Anywhere))
  .Add(Restrictions.InsensitiveLike(Projections.Property<CrmContact>(c => c.Phone.Substring(6, 4)), filtString, MatchMode.Anywhere)));

但是，我遇到了最后3个语句的问题，因为我在运行它时遇到“找不到方法子字符串”错误。我使用子字符串来尝试匹配电话号码的单独部分，如果过滤器是电话号码/一部分（例如“123”匹配“1234567890”而不是“0123456789”，因为这将跨越两个份）。

对此表示感谢，谢谢。

Answer 1

在lambda中使用SubString是linq-to-nhibernate的正确，而不是queryover。您正在使用queryover，请避免使用linq-to-nhibernate语法或使用Linq而不是QueryOver。

Linq（Contains和==不区分大小写取决于您的数据库，如果您的数据库已经不区分大小写，则可以删除ToUpper次调用）：

using System.Linq;
using NHibernate.Linq;

// ...

filtString = filtString.ToUpper();
var query = Session.Query<CrmContact>()
    .Where(x => x.Account.ID == account.ID && x.IsActive && x.IsContact)
    .Where(c => c.FirstName.ToUpper().Contains(filtString) ||
        c.LastName.ToUpper().Contains(filtString) ||
        c.Email.ToUpper().Contains(filtString) ||
        c.Company.ToUpper() == filtString ||
        c.Phone.ToUpper().Substring(0, 3).Contains(filtString) ||
        c.Phone.ToUpper().Substring(3, 3).Contains(filtString) ||
        c.Phone.ToUpper().Substring(6, 4).Contains(filtString));

QueryOver：

var query = Session.QueryOver<CrmContact>()
    .Where(x => x.Account.ID == account.ID && x.IsActive && x.IsContact);    

query.And(Restrictions.Disjunction()
   .Add(Restrictions.InsensitiveLike(Projections.Property<CrmContact>(c => c.FirstName),
        filtString, MatchMode.Anywhere))
   .Add(Restrictions.InsensitiveLike(Projections.Property<CrmContact>(c => c.LastName),
        filtString, MatchMode.Anywhere))
   .Add(Restrictions.InsensitiveLike(Projections.Property<CrmContact>(c => c.Email),
        filtString, MatchMode.Anywhere))
   .Add(Restrictions.InsensitiveLike(Projections.Property<CrmContact>(c => c.Company),
        filtString))
   .Add(Restrictions.InsensitiveLike(
        Projections.SqlFunction("substring", NHibernateUtil.String,
            Projections.Property<DimServicePoint>(c => c.Phone),
            Projections.Constant(0), Projections.Constant(3)),
        filtString, MatchMode.Anywhere))
   .Add(Restrictions.InsensitiveLike(
        Projections.SqlFunction("substring", NHibernateUtil.String,
            Projections.Property<DimServicePoint>(c => c.Phone),
            Projections.Constant(3), Projections.Constant(3)),
        filtString, MatchMode.Anywhere))
   .Add(Restrictions.InsensitiveLike(
        Projections.SqlFunction("substring", NHibernateUtil.String,
            Projections.Property<DimServicePoint>(c => c.Phone),
            Projections.Constant(6), Projections.Constant(4)),
        filtString, MatchMode.Anywhere)));

找不到C＃NHibernate子串方法

1 个答案: