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所以我有一个名为 的存储过程get_by_cat_and_tag，它应该返回 table MS，并且在我的 C# 代码中它应该返回一个MS对象列表，其中MS.hbm.xml包含以下内容：

<sql-query name="get_by_cat_and_tag">
    <!-- return type must be an NHibernate mapped entity -->
    <return class="MS">

      <return-property column="Id" name="Id" />
      <return-property column="FileName" name="FileName" />
      <return-property column="DisplayTitle" name="DisplayTitle" />
      <return-property column="IsEnabled" name="IsEnabled" />
      <return-property column="MediaType" name="MediaType" />
      <return-property column="Priority" name="Priority" />
      <return-property column="DateCreated" name="DateCreated" />
      <return-property column="DateLastModified" name="DateLastModified" />
      <return-property column="Description" name="Description" />
      <return-property column="ImagePath" name="ImagePath" />

    </return>
    <!--exec get_by_cat_and_tag@categoryId=:catId, @tagId=:tId-->
    exec get_by_cat_and_tag:catId, :tId
</sql-query>

从这个存储过程返回的所有列名都是正确的，为方便起见，我将它们设为相同。

数据访问层包含对存储过程的调用：

var query = session.GetNamedQuery("get_by_cat_and_tag")
                   .SetParameter("catId", categoryId).SetParameter("tId", tagId)
                   .List<MS>();

异常消息：

could not execute query

[ exec get_by_cat_and_tag @p0, @p1 ]
Name:catId - Value:130  Name:tId - Value:449
[SQL: exec get_by_cat_and_tag @p0, @p1]

The stack trace:
   at System.Data.SqlClient.SqlDataReader.GetOrdinal(String name)
   at NHibernate.Type.NullableType.NullSafeGet(IDataReader rs, String name)
   at NHibernate.Loader.Loader.GetInstanceClass(IDataReader rs, Int32 i, ILoadable persister, Object id, ISessionImplementor session)
   at NHibernate.Loader.Loader.InstanceNotYetLoaded(IDataReader dr, Int32 i, ILoadable persister, EntityKey key, LockMode lockMode, String rowIdAlias, EntityKey optionalObjectKey, Object optionalObject, IList hydratedObjects, ISessionImplementor session)
   at NHibernate.Loader.Loader.GetRow(IDataReader rs, ILoadable[] persisters, EntityKey[] keys, Object optionalObject, EntityKey optionalObjectKey, LockMode[] lockModes, IList hydratedObjects, ISessionImplementor session)
   at NHibernate.Loader.Loader.GetRowFromResultSet(IDataReader resultSet, ISessionImplementor session, QueryParameters queryParameters, LockMode[] lockModeArray, EntityKey optionalObjectKey, IList hydratedObjects, EntityKey[] keys, Boolean returnProxies)
   at NHibernate.Loader.Loader.DoQuery(ISessionImplementor session, QueryParameters queryParameters, Boolean returnProxies)
   at NHibernate.Loader.Loader.DoQueryAndInitializeNonLazyCollections(ISessionImplementor session, QueryParameters queryParameters, Boolean returnProxies)
   at NHibernate.Loader.Loader.DoList(ISessionImplementor session, QueryParameters queryParameters)

任何帮助表示赞赏。

4

1 回答 1

2

您在单词标签后缺少一个空格：-

exec get_by_cat_and_tag:catId, :tId

应该：-

exec get_by_cat_and_tag :catId, :tId

另请注意，返回的所有列也必须匹配以防万一，它总是值得检查那个。

于 2013-05-04T18:04:53.467 回答