Comma delimited value Entity Framework in contains Statement - linq

Question

I have LINQ statement that has a comma delimited value.
I want to see if my Field matches any of the comma delimited values.
public string IdentifyProductSKU(string Serial)
{
int Len = Serial.Length;
var Split = from ModelSplitter in entities.Models
select ModelSplitter.m_validationMask.Split(',');
var Product = (from ModelI in entities.Models
where ModelI.m_validation == 0 &&
ModelI.m_validationLength == Len &&
ModelI.m_validationMask.Contains(Serial.Substring(ModelI.m_validationStart, ModelI.m_validationEnd))
select ModelI.m_name).SingleOrDefault();
return Product;
}
To explain the code: Every Model has got multiple identifying properties for eg. XX1,XX5,XX7 is all the same product. Now when I pass in a serial number I want to Identify the product based on the validation mask. For eg: XX511122441141 is ProductA and YY123414124 is ProductC. I Just want to split the in this query so in this line:
ModelI.m_validationMask.Contains(Serial.Substring(ModelI.m_validationStart, ModelI.m_validationEnd))
I want to Split the Validation mask To see if the serial contains any of the validation mask characters. Does this make sense?

Answer 1

This is how you split values into a list
var split = context.Packs.Select(u => u.m_validationMask).ToList();
List<String[]> list=new List<String[]>();
foreach (var name in split)
{
String[] str = name.Split(',');
list.Add(str);
}
Now I need to know how I can use that list in my Final EF Query:
int Len = Serial.Length;
var split = entities.Models.Select(u => u.m_validationMask).ToList();
List<String[]> list = new List<String[]>();
foreach (var name in split)
{
String[] str = name.Split(',');
list.Add(str);
}
var Product = (from ModelI in entities.Models
where ModelI.m_validation == 0 &&
ModelI.m_validationLength == Len &&
list.Contains(Serial.Substring(ModelI.m_validationStart, ModelI.m_validationEnd))
select ModelI.m_name).SingleOrDefault();
return Product;

Answer 2

I don't fully understand what you mean or what you are trying to do. But...
If your ModelSplitter.m_malicationMask can indead be split as you had demonstrated, then Split is a List then. What I don't understand is if you are trying to match the entire product A, or just the first three characters, you can modifiy your query
var Product = (from ModelI in entities.Models
where ModelI.m_validation == 0 &&
ModelI.m_validationLength == Len &&
ModelI.m_validationMask.Contains(Serial.Substring(ModelI.m_validationStart, ModelI.m_validationEnd))
let productId = ModelI.m_name.Substring(0, 3)
where split.Contains(productId)
select ModelI.m_name).SingleOrDefault();
Product should now be null if it does not match or an acutal product if it does.