Question

I found this URL about how to add an item in my table.
http://msdn.microsoft.com/en-us/library/bb386941.aspx

// Create a new Order object.
Order ord = new Order
{
    OrderID = 12000,
    ShipCity = "Seattle",
    OrderDate = DateTime.Now
    // …
};

This should work without any problems

but if I have something like this:

// Create a new Order object.
Order ord = new Order
{
    OrderID = 12000,
    CustomerID = 22, // where CustomerID is a foreign key to table Customer
    ShipCity = "Seattle",
    OrderDate = DateTime.Now
    // …
};

Then it will give errors like:
Exception Details: System.Data.SqlClient.SqlException: The INSERT statement conflicted with the FOREIGN KEY constraint “FK7_REVIEW”. The conflict occurred in database “Dbname”, table “dbo.Customer”, column ‘CustomerID’.
The statement has been terminated.

How can I insert a row in my table, whith foreign keys?

Answer 1

Order.CustomerID refers to a primary key in another table (say Customer). To insert the new order, the CustomerID must be equal to an existing value of the primary key in Customer table.