从C＃代码使用SQL Server CE选择@@ IDENTITY

Question

Im using Data Adapter/Set in SQL CE, i do create the following query to insert into table and then SELECT @@IDENTITY, I want this SELECT statement return me the Student ID each time after Inserting into table, here is my Query:

INSERT INTO [Student] ([Name], [Family], [Address], [Phonenumber])
VALUES(@Name,@Family,@Address,@Phonenumber);
SELECT  @@IDENTITY;

here is how i call query:

int x = da.Insert("Albert", "Alexandra", "No4.Oxford", Telnum);

Int x suppose to return me ID...

Here is the Error im getting :

There was an error parsing the query. [ Token line number = 4,Token line offset = 1,Token in error = SELECT ]

Insert Query it self it works but once adding SELECT @@ IDENTITY at the end im getting error.

I really don't know what i'm doing wrong.

Answer 1

The return value of ExecuteNonQuery will be number of rows effected by these query. so you need to use store procedure instead of Single Query.

Answer 2

根据MSDN ，CE每次执行不支持多个命令，您需要作为两个命令同步执行。

Answer 3

If you'd like to do this in a single call, you need to use a stored procedure rather than Insert , because it uses ExecuteNonQuery , which does not return any records. Otherwise you'll need to perform a select in another call to determine the identity.

The return value of ExecuteNonQuery is an integer that denotes the number of rows affected by your call.