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Inserting Foreign Key Value if it doesn't exist?

Posted By:      Posted Date: September 02, 2010    Points: 0   Category :ASP.Net
I am inserting a record and want to set the value for a foreign key but I am getting an error - I initally thought that it would insert it if it didn't exist but I must be wrong and want to confirm that I need to check all values and make a record for them if they don't exist... here's what I am trying to do - does his make sense?var newAllPart = new Part();                newAllPart.PartNumber = partNumber;                newAllPart.Manufacturer.ManufacturerName = partManufacturer; // error here if the Manufacturer doesn't exists already                newAllPart.PartType.PartTypeName = partType;                newAllPart.Category.CategoryName = partCategory;                newAllPart.DateCreated = DateTime.Now;                newAllPart.UserCreated = userCreated;                newAllPart.Package.PackageName = partPackage;    

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