C# 如何使用nhibernate查询器拆分字符串字段并检查其是否包含指定字符串？

我正在尝试使用NHibernate QueryOver返回带有逗号分隔字符串的列（DoNotDisplay）不包含特定字符串（例如“3”）的结果

我尝试了以下方法：

var query = session.QueryOver<Host>()
.Where(h => !h.systemsNotToBeShown.Split(',').Contains("3"));

public virtual string systemsNotToBeShown { get; set; }

var query = session.QueryOver<Host>()
.Where(h => !h.SystemsNotToBeShown.Contains(3));

var queryString = "( ( (select position('" + sourceId + "' in trim(NODISPONSYSTEM) ) > 0 from system.iota) = false) or trim(NODISPONSYSTEM) is null) ";

映射如下：

<property name="systemsNotToBeShown" column="DoNotDisplay" />

private virtual string _systemsNotToBeShown { get; set; }
public virtual List<int> SystemsNotToBeShown
{
   get
    {
    return string.IsNullOrEmpty(_systemsNotToBeShown) ? new List<int>() : _systemsNotToBeShown.Split(',').Select(Int32.Parse).ToList();
    }
     set { }
     }

我还尝试将映射属性设置为private，并在类本身中创建一个列表，然后根据该列表进行比较，如下所示：

<property name="systemsNotToBeShown" column="DoNotDisplay" />

private virtual string _systemsNotToBeShown { get; set; }
public virtual List<int> SystemsNotToBeShown
{
   get
    {
    return string.IsNullOrEmpty(_systemsNotToBeShown) ? new List<int>() : _systemsNotToBeShown.Split(',').Select(Int32.Parse).ToList();
    }
     set { }
     }

---

我不确定我做错了什么。任何帮助都会很好。

我通过以下方法解决了这个问题：

var query = session.QueryOver<Host>()
.Where(h => !h.systemsNotToBeShown.Split(',').Contains("3"));

public virtual string systemsNotToBeShown { get; set; }

var query = session.QueryOver<Host>()
.Where(h => !h.SystemsNotToBeShown.Contains(3));

var queryString = "( ( (select position('" + sourceId + "' in trim(NODISPONSYSTEM) ) > 0 from system.iota) = false) or trim(NODISPONSYSTEM) is null) ";

然后使用以下行将其添加到QueryOver：

.And(NHibernate.Criterion.Expression.Sql(queryString))