如何为要与dataTable插入的一对多关系表编写插入语句

Question

i have 3 tables in dataset when i click save button, i want to add these tables to database tables using data adapter all these 3 tables primary keys are sql generated auto number.

relation ships Invoice, InvoiceProduct , InvoiceProductExp tables are: InvoiceNo has many InvoiceProductNo InvoiceProductNo has many InvoiceProductExpNo

the following code can not solve these relaionship

DECLARE @InvoiceNo INT
DECLARE @InvoiceProductNo INT
INSERT INTO Invoice ([Date])
VALUES (GETDATE())
SELECT @InvoiceNo = SCOPE_IDENTITY()
INSERT INTO InvoiceProduct([InvoiceNo])
VALUES (@InvoiceNo)
SELECT @InvoiceProductNo = SCOPE_IDENTITY() 
INSERT INTO InvoiceProductExp ([InvoiceProductNo], [InvoiceNo])
VALUES (@InvoiceProductNo, @InvoiceNo)

Answer 1

If you are using a Dataset and DataAdapter, you shouldn't be issuing all those statements. Each data adapter needs only know how to update its records. When you update the parent, the identity value will be put into your dataset automatically and the child records will automatically be set (assuming you set up your relationships correctly.) After that, you update the child tables.

Read some of the comments in this SO thread, there are some good code snippets there.