This is a complete decision on how to use LINQ to process the results of a JSON request from the elasticsearch engine.
Connection Library - PlainElastic.NET
-, PlainElastic.NET : elasticsearch. GET, POST PUT. client. result.ToString() JSON elasticsearch. DLL .
JSON - JSON.NET
NewtonSoft JSON.NET LINQ. JObject, , LINQ. . , HitCount, , , , , LINQ, , . , , JSON. DLL .
'Execute the Search
Dim client = New ElasticConnection("localhost", 9200)
Dim result = client.Post("myindex/mytype/_search", elastic_query) 'elastic_query = well-formatted elasticsearch query (json string)'
Dim J As JObject = JObject.Parse(result.ToString())
'How many results were located?
Dim HitCount = CInt(J("hits")("total"))
'What was the maximum score? Maybe you want to know this for normalizing scores to 0-100.
' - We make sure we have hits first
' - Also, make sure scoring is turned on. It might be turned off if an alternate sort method is used in your query
If HitCount > 0 AndAlso J("hits")("max_score").Type <> JTokenType.Null Then MaxScore = CDbl(J("hits")("max_score"))
LINQ
LINQ Gridviews, DataLists, Repeaters .. LINQ. (Stores, Categories)
Dim SearchResults = _
(From X In J("hits")("hits")
Select
score = CDec(If(X("_score").Type = JTokenType.Null, 0, X("_score"))),
boost = CDbl(X("_source")("_boost")),
InstitutionID = CInt(X("_source")("InstitutionID")),
Name = CStr(X("_source")("Name")),
Stores = (From S In X("_source")("Stores") Select CInt(S("StoreID"))).ToList(),
Categories = (From Z In X("_source")("Categories") Select CatID = CInt(Z("CatID")), CatName = CStr(Z("CatName")), InstitutionID = CInt(X("_source")("InstitutionID"))).ToList()
Order By score Descending, boost Descending
)
Repeater, DataList Gridview
MyRepeater.DataSource = SearchResults
MyRepeater.DataBind()