我正在使用这个 sql 的存储过程:
I'm using a stored procedure with this sql:
INSERT INTO [dbTblUsers]([strUsername], [strPassword])
VALUES (@p1,@p2);
SELECT @@IDENTITY;
并调用程序:
// Insert new user
nId = daUsers.InsertQuery(textBoxUsername.Text, textBoxPassword.Text);
// Insert new Twitter OAuth
daTwitterOAuth.Insert(nId, textBoxConsumerKey.Text, textBoxConsumerSecret.Text, textBoxToken.Text, textBoxTokenSecret.Text);
如何将对象 @@IDENTITY 转换为 int nId?像这样?
How do I cast the object @@IDENTITY int the int nId? Like this?
nId = (int)daUsers.InsertQuery(textBoxUsername.Text, textBoxPassword.Text);
首先,不要使用@@IDENTTY
- 使用SCOPE_IDENTITY()
;如果涉及任何触发器,第一个可以给你意想不到的答案.其次;这两个都返回小数;将其投射到呼叫站点,IMO:
Firstly, don't use @@IDENTTY
- use SCOPE_IDENTITY()
; the first can give you unexpected answers if there are any triggers involved. Secondly; both of these return decimals; cast it at the call-site, IMO:
SELECT CAST(SCOPE_IDENTITY() as int)
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