C# – Problems with IDENTITY_INSERT Set to OFF? :-/

asp.netcidentitysqlsql server

I'm trying to insert order details into my DB, and it keeps saying:

Cannot insert explicit value for identity column in table 'Orders' when IDENTITY_INSERT is set to OFF.

All I am trying to do is simply insert the users UserId into the UserId column, by using WebSecurity.CurrentUserId – Why is this not working?

I have:

dbase.Execute("INSERT INTO Orders 
                 (UserId, OrderId, Status) 
               VALUES 
                 (@0, @1, @2)", 
               WebSecurity.CurrentUserId, 
               Session["OSFOID"], 
               "Confirmed");`

So, as you can see, it's pretty simple. But, why won't it work?

My table definition is:

Table Definition

Best Answer

Unless you enable the ability to do identity-insert (by setting identity-insert on for that table), you are NOT ALLOWED to touch that column - the database owns it.

Either enable identity insert briefly, or: don't try to insert the UserId (let the DB create a new id).

As per books online, SET IDENTITY_INSERT:

SET IDENTITY_INSERT Orders ON
INSERT INTO Orders (UserId, OrderId, Status) VALUES (@0, @1, @2)
SET IDENTITY_INSERT Orders OFF

More likely, though: if this is the Orders table, should the identity not be on OrderId ? You'd still have the same problem since you are trying to control the OrderId, of course.

Syntax:

ALTER TABLE {TABLENAME} 
ADD {COLUMNNAME} {TYPE} {NULL|NOT NULL} 
CONSTRAINT {CONSTRAINT_NAME} DEFAULT {DEFAULT_VALUE}
WITH VALUES

Example:

ALTER TABLE SomeTable
        ADD SomeCol Bit NULL --Or NOT NULL.
 CONSTRAINT D_SomeTable_SomeCol --When Omitted a Default-Constraint Name is autogenerated.
    DEFAULT (0)--Optional Default-Constraint.
WITH VALUES --Add if Column is Nullable and you want the Default Value for Existing Records.

Notes:

Optional Constraint Name:
If you leave out CONSTRAINT D_SomeTable_SomeCol then SQL Server will autogenerate
a Default-Contraint with a funny Name like: DF__SomeTa__SomeC__4FB7FEF6

Optional With-Values Statement:
The WITH VALUES is only needed when your Column is Nullable
and you want the Default Value used for Existing Records.
If your Column is NOT NULL, then it will automatically use the Default Value
for all Existing Records, whether you specify WITH VALUES or not.

How Inserts work with a Default-Constraint:
If you insert a Record into SomeTable and do not Specify SomeCol's value, then it will Default to 0.
If you insert a Record and Specify SomeCol's value as NULL (and your column allows nulls),
then the Default-Constraint will not be used and NULL will be inserted as the Value.

Notes were based on everyone's great feedback below.
Special Thanks to:
@Yatrix, @WalterStabosz, @YahooSerious, and @StackMan for their Comments.

Sql – How to insert into a table with just one IDENTITY column

This should work:

INSERT INTO GroupTable DEFAULT VALUES

Best Answer

Related Solutions

Sql – Add a column with a default value to an existing table in SQL Server

Syntax:

Example:

Notes:

Sql – How to insert into a table with just one IDENTITY column

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