如何插入外键值

Question

I have two tables artist and arts . artistId is the primary key in the artist table and it is the foreign key in arts table. I am using a stored procedure to insert data. First artist log in and then art info page is displayed where artist insert art info. I want that artist id to get inserted in arts table also when he inserts art info.

I tried this as:

Stored procedure:

if exists(select artistId from artist)
    insert into arts(name, description, artistId) 
    values(@name, @description, @artistId)

asp.net code:

cmd.Parameters.AddWithValue("@name",txtname.Text);
cmd.Parameters.AddWithValue("@category",ddlcategory.SelectedValue);

It is not working.

I am new to stored procedure. Please help me to get the foreign key value. Or is there any other way?

Answer 1

When you do this:

if exists(select artistId from artist)
    insert into arts(name, description, artistId) 
    values(@name, @description, @artistId)

Shouldn't you be checking against who is logged in? Something like:

if exists(select 1 from artist where artistId = @artistId)
    insert into arts(name, description, artistId) 
    values(@name, @description, @artistId)

Aren't you trying to see if they exist before you insert art for them? Is that the issue? But like the comments above say, it is difficult to guess at the problem without more info.