我通过 Entity Framework Code-First 中的存储过程实现实体。存储过程接受一个 int 参数并输出记录的选择和几个输出参数。无论出于何种原因,在从 SQL Management Studio 执行 Proc 时,我的输出参数返回 Null 会导致预期的行为;所有输出参数都有值。我的实体正在被物化,所以至少那是有效的……
英孚代码
SqlParameter DocsWithHits = new SqlParameter()
{
ParameterName = "DocumentsWithHits",
Direction = System.Data.ParameterDirection.Output,
Value = null,
SqlDbType = System.Data.SqlDbType.Int
};
SqlParameter TotalGB = new SqlParameter()
{
ParameterName = "TotalGb",
Direction = System.Data.ParameterDirection.Output,
Value = null,
SqlDbType = System.Data.SqlDbType.Float
};
ObservableCollection<SearchResult> ResultCollection;
ResultCollection = new ObservableCollection<SearchResult>(db.Database.SqlQuery<SearchResult>(
"exec ListSearchResultsWithTotals @SearchAnalysisID, @DocumentsWithHits, @RelatedDocuments, @TotalDocuments, @TotalGb, @DocumentsWithHitsNotExported, @RelatedDocumentsNotExported, @TotalDocumentsNotExported, @TotalGbNotExported",
new SqlParameter
{
ParameterName = "SearchAnalysisID",
Value = this.SearchAnalysisId
},
DocsWithHits,
TotalGB));
SQL 探查器
下面是从 SqlQuery 方法生成的 SQL。我在 Profiler 中捕获了它。执行时,我得到记录和空输出参数。
declare @p4 int
set @p4=NULL
declare @p5 float
exec sp_executesql N'exec ListSearchResultsWithTotals @SearchAnalysisID, @DocumentsWithHits, @TotalGb',N'@SearchAnalysisID int,@DocumentsWithHits int output,@TotalGb float output',@SearchAnalysisID=170,@DocumentsWithHits=@p4 output,@TotalGb=@p5 output
select @p4, @p5, @p6, @p7, @p8, @p9, @p10, @p11
我使用 SqlParameter 错误还是什么?