AutoGenerate Id For Insert Operation

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I am using 3 Tier Architecture for insert the data into the database..
but my problem how to generate prod_id automatic without entering into textbox or label.
when page loads,it automatic change..
plz reply

Posted 21-Sep-12 0:17am

mohit jain

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Ashish U Raut · Answer 1 · 2012-09-21T00:24:00

Your database can generate the sequential IDs for you.

1) Create an ID column in your database (I am guessing you are using MS SQL because you stated only C#).
2) Set Identity column to true on the ID column
3) Set Autoincrement to true on the ID column

The ID column value will be created automatically based on existing items in the database and you will get a sequence 1,2,3,.. for your product IDs. This column can also become the primary key for your Students table.

_Amy · Answer 2 · 2012-09-21T01:10:00

Solution 2

You should use IDENTITY[^] property of Transact-Sql to define an identity column for the table. You don't need to insert values in identity column. I'll automatically insert a running number in your table column.
Refer the links for example:
Identity Columns[^]
IDENTITY columns in SQL Server[^]

All the best.
--Amit

Posted 21-Sep-12 1:10am

_Amy

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mohit jain 21-Sep-12 7:18am

plz tell me clearly..
plz step by step
plz if u can....

_Amy 21-Sep-12 7:24am

Create a table with IDENTITY column. Try,

CREATE TABLE tblTest(
   ID INT IDENTITY,
   Name VARCHAR(50) NOT NULL,
   Address VARCHAR(150) NOT NULL
)

Insert the values to it, like:
INSERT INTO tblTest VALUES('Amit', '#142, Bangalore');
So you don't suppose to insert a value in identity column. The value for identity column will be inserted automatically like, 1, 2, 3, 4, 5 etc.