C# update语句在SSM中工作，但在代码中不工作

我两天来一直把头撞在墙上。此update语句在ssms中运行时有效

update dbo.DEMOGRAPHICS 
set ETHNICITY = (select distinct(ethnicity) from dbo.DEMOGRAPHICS where PEOPLE_CODE_ID = 'P000084716' and ACADEMIC_SESSION != '')
, GENDER = (select distinct(GENDER) from dbo.DEMOGRAPHICS where PEOPLE_CODE_ID = 'P000084716' and ACADEMIC_SESSION != '')
, MARITAL_STATUS = (select distinct(MARITAL_STATUS) from dbo.DEMOGRAPHICS where PEOPLE_CODE_ID = 'P000084716' and ACADEMIC_SESSION != '')
, RELIGION = (select distinct(RELIGION) from dbo.DEMOGRAPHICS where PEOPLE_CODE_ID = 'P000084716' and ACADEMIC_SESSION != '')
, VETERAN = (select distinct(VETERAN) from dbo.DEMOGRAPHICS where PEOPLE_CODE_ID =  'P000084716' and ACADEMIC_SESSION != '')
, CITIZENSHIP = (select distinct(CITIZENSHIP) from dbo.DEMOGRAPHICS where PEOPLE_CODE_ID = 'P000084716'and ACADEMIC_SESSION != '')
,RETIRED = (select distinct(RETIRED) from dbo.DEMOGRAPHICS where PEOPLE_CODE_ID = '000084716' and ACADEMIC_SESSION != '')
, LEGAL_RESIDENCE = (select distinct(LEGAL_RESIDENCE) from dbo.DEMOGRAPHICS where   PEOPLE_CODE_ID = 'P000084716' and ACADEMIC_SESSION != '')
where PEOPLE_CODE_ID = 'P000084716'  and ACADEMIC_SESSION = ''

但是在代码中进行更新并不能

string updDemoRecords = @"update dbo.DEMOGRAPHICS 
set ETHNICITY = (select distinct(ethnicity) from dbo.DEMOGRAPHICS where PEOPLE_CODE_ID = '{0}' and ACADEMIC_SESSION != '')
, GENDER = (select distinct(GENDER) from dbo.DEMOGRAPHICS where PEOPLE_CODE_ID = '{0}' and ACADEMIC_SESSION != '')
, MARITAL_STATUS = (select distinct(MARITAL_STATUS) from dbo.DEMOGRAPHICS where PEOPLE_CODE_ID = '{0}' and ACADEMIC_SESSION != '')
, RELIGION = (select distinct(RELIGION) from dbo.DEMOGRAPHICS where PEOPLE_CODE_ID = '{0}' and ACADEMIC_SESSION != '')
, VETERAN = (select distinct(VETERAN) from dbo.DEMOGRAPHICS where PEOPLE_CODE_ID = '{0}' and ACADEMIC_SESSION != '')
, CITIZENSHIP = (select distinct(CITIZENSHIP) from dbo.DEMOGRAPHICS where PEOPLE_CODE_ID = '{0}'and ACADEMIC_SESSION != '')
,RETIRED = (select distinct(RETIRED) from dbo.DEMOGRAPHICS where PEOPLE_CODE_ID = '{0}' and ACADEMIC_SESSION != '')
, LEGAL_RESIDENCE = (select distinct(LEGAL_RESIDENCE) from dbo.DEMOGRAPHICS where PEOPLE_CODE_ID = '{0}' and ACADEMIC_SESSION != '')
where PEOPLE_CODE_ID = '{0}'  and ACADEMIC_SESSION = ''";
updDemoRecords = string.Format(updDemoRecords, peopleOrgCodeID);
pcCon = new SqlConnection(pcConnString);
SqlCommand doUpdDemoRecords = new SqlCommand(updDemoRecords, pcCon);
pcCon.Open();
doUpdDemoRecords.ExecuteNonQuery();
pcCon.Close();

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也从存储的进程中尝试了它，但它也不会更新相关的行。这是sql server 2008和c#.net

在我看来，问题在于您使用的是一个实际的数字（

peopleOrgCodeID

）-在SSMS版本（使用字符串）中使用时，这将不会有前导的

0

es

因此，如果

peopleOrgCodeId

是一个值为

84716

的整数（或长整数），则您的

WHERE

子句将结束为：

where PEOPLE_CODE_ID = '84716'

而不是：

where PEOPLE_CODE_ID = '000084716'

您可以通过使用或传递带前导零的字符串值来解决此问题

---

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我会提到SQL注入是一个可能的问题，但是如果

peopleOrgCodeID

确实是一个整数，那么在这个例子中您是安全的。但是，我仍然会使用参数化查询而不是

string.Format

。

什么类型是

peopleOrgCodeID

？什么是“不起作用”呢？错误消息告诉您什么？您是否正确地将SQL分配给updDemoRecords变量？@usr-我假设查询不会更新。。。没有错误，但没有预期的结果。这是正确的。我想是的。我在string.format后面抓取它，看看它传递了什么。这是一个不带参数的控制台应用程序。人员代码以一个P开头。我编辑了原始问题。@Brian-那么它是一个字符串？您确定

peopleOrgCodeID

包含正确的值吗？您是否使用SQL探查器查看实际传入SQL Server的内容？