c# - Show similar products or variants -


i want show similar products called variants product. doing below:

public ilist<product> getvariants(string productname) {     efcontext db = new efcontext();  //using entity framework     return db.products            .where(product = > product.productname == productname)            .tolist(); }

but , results exact match, current product itself. thinking use levenshtein distance basis similar products. , before want check majority developers getting variants?

  1. is use levenshtein distance ? used in industry purpose?
  2. do have add table in database showing variants product while adding product database?

i used jaro-winkler distance account typos in 1 system wrote while back. imo, it's better simple edit distance calculation can account string lengths effectively. see this question on open source implementations.

i ended writing in c# , importing sql server sql clr function, still relatively slow. worked in case because such queries executed infrequently (100-200 in day).

if expect lot of traffic, you'd have build index make these lookups faster. 1 strategy periodically compute distance between each pair of products each pair of products , store in index table if distance exceeds threshold. reduce amount of work needs done, can run once or twice day , can limit new or modified records since last run. can similar products , order distance quickly.


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