Linq suche / Liste mit Listeneintrag vergleichen und selektieren

Morrison · 19. Juli 2018, 14:55

Huh, weiter geht's..

..ich hab jetzt eine LinQ suche die mir eine distinct-Liste zurückgibt!

Ist es möglich diese Liste nach einem Eintrag zu durchsuchen sodass ich den "Klassenzweig" markieren kann?

Also das ist die erste LinQ suche:

Spoiler anzeigen

Nun hab ich eine andere Liste mit Einträgen!
Die erste Liste soll nun durchsucht werden nach möglichen Einträgen der zweiten Liste! Dies soll/muss aber in der ersten LinQ Abfrage geschehen damit ich mir den "Klassenzweig" speichern kann!

Ich hatte sowas versucht, aber da bekomme ich alle Klassenzweige zurück:

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VB.NET-Quellcode

Dim _fittingJSON = From _result In JSON_ROOT_acoustID.Results Where _result.Recordings IsNot Nothing
From _recording In _result.Recordings Where _recording.Releasegroups IsNot Nothing
From _releasegroup In _recording.Releasegroups Where _releasegroup.Releases IsNot Nothing
From _release In _releasegroup.Releases Where _release.Mediums IsNot Nothing
From _medium In _release.Mediums Where _medium.Title = _mediumTitle.ToList.Find(Function(p)
If p = _medium.Title Then
Return True
End If
Return False
End Function)
Select New List(Of Integer)(New Integer() {JSON_ROOT_acoustID.Results.IndexOf(_result),
_result.Recordings.IndexOf(_recording),
_recording.Releasegroups.IndexOf(_releasegroup),
_releasegroup.Releases.IndexOf(_release),
_release.Mediums.IndexOf(_medium)})

Hoffe es ist verständlich was ich möchte!?
Die erste LinQ-Suche durchsucht alle Elemente. Wenn in dieser Liste ein Element der zweiten Liste "entdeckt" wird sollen die Indexe in einer Liste gespeichert werden!

Nofear23m · 19. Juli 2018, 15:25

Hallo

Morrison schrieb:

Dies soll/muss aber in der ersten LinQ Abfrage geschehen damit ich mir den "Klassenzweig" speichern kann!

Verstehe das mit dem Klassenzweig nicht ganz. Kannst du wieder ein Beispiel machen was du hast und was du erhalten willst?

Grüße
Sascha

Morrison · 19. Juli 2018, 16:19

Nen Beispiel-JSON-String:

Spoiler anzeigen

Quellcode

{"status": "ok", "results": [{"recordings": [{"sources": 1, "releasegroups": [{"id": "55360a70-c7f9-3073-9136-1cf2d6daba1b", "releases": [{"mediums": [{"position": 2, "tracks": [{"position": 10, "artists": [{"id": "bdbd48f5-abf3-4a4f-9a21-4551dbc3fde9", "name": "Heart"}], "id": "16f12d57-923c-3c43-a423-7bc1998ff86a", "title": "Barracuda"}], "track_count": 21}], "id": "d3f4211c-8b23-48cb-9454-15bdd15118d1"}]}], "id": "21fc4931-f3ab-499b-a614-5d0c9e78577e"}, {"sources": 110, "releasegroups": [{"id": "a9e2a142-3083-3e66-9150-5f44836d69c4", "releases": [{"mediums": [{"position": 1, "tracks": [{"position": 1, "artists": [{"id": "bdbd48f5-abf3-4a4f-9a21-4551dbc3fde9", "name": "Heart"}], "id": "125ffba7-e3b3-4ee2-8244-fcee8e2b6378", "title": "Barracuda"}], "track_count": 15, "format": "CD"}], "id": "11ce1bde-fdaf-44b3-bc1f-dd18b0401aed"}, {"mediums": [{"position": 1, "tracks": [{"position": 1, "artists": [{"id": "bdbd48f5-abf3-4a4f-9a21-4551dbc3fde9", "name": "Heart"}], "id": "32f776eb-9e93-35f5-8914-2ff4fec7987b", "title": "Barracuda"}], "track_count": 9, "format": "Vinyl"}], "id": "d46f948f-04dd-490d-b8bf-4948dffde1cb"}, {"mediums": [{"position": 1, "tracks": [{"position": 1, "artists": [{"id": "bdbd48f5-abf3-4a4f-9a21-4551dbc3fde9", "name": "Heart"}], "id": "0aaf67eb-8ab6-3da1-bb5f-62b933579c7c", "title": "Barracuda"}], "track_count": 15, "format": "CD"}], "id": "b6051999-d9dd-443f-824c-af9323e45736"}, {"mediums": [{"position": 1, "tracks": [{"position": 1, "artists": [{"id": "bdbd48f5-abf3-4a4f-9a21-4551dbc3fde9", "name": "Heart"}], "id": "731b9e8a-0f5b-46e2-8fba-29fab93cfcff", "title": "Barracuda"}], "track_count": 15, "format": "Digital Media"}], "id": "f6265aeb-a9d8-44ae-b454-9c924de4e3eb"}]}, {"id": "d934be44-eab0-3b1d-a0d3-d9a037a71bb4", "releases": [{"mediums": [{"position": 3, "tracks": [{"position": 15, "artists": [{"id": "bdbd48f5-abf3-4a4f-9a21-4551dbc3fde9", "name": "Heart"}], "id": "75cc78a6-43ec-37ef-b192-7c2327dba142", "title": "Barracuda"}], "track_count": 16, "format": "CD"}], "id": "0833f559-ebcf-48b0-b349-0b39d777b531"}]}, {"id": "ae8650ae-3410-31db-8bd9-e80b892850d3", "releases": [{"mediums": [{"position": 1, "tracks": [{"position": 8, "artists": [{"id": "bdbd48f5-abf3-4a4f-9a21-4551dbc3fde9", "name": "Heart"}], "id": "4105285c-dc48-46c7-9c2a-99f0d884476c", "title": "Barracuda"}], "track_count": 15, "format": "CD"}], "id": "f56ffb9b-a34e-4262-9693-59bb5eb56af7"}, {"mediums": [{"position": 1, "tracks": [{"position": 8, "artists": [{"id": "bdbd48f5-abf3-4a4f-9a21-4551dbc3fde9", "name": "Heart"}], "id": "4c160052-453b-3987-9df7-0391d5467fb3", "title": "Barracuda"}], "track_count": 15, "format": "CD"}], "id": "8baef35b-63b9-486b-a245-a8037d6c00b8"}, {"mediums": [{"position": 1, "tracks": [{"position": 8, "artists": [{"id": "bdbd48f5-abf3-4a4f-9a21-4551dbc3fde9", "name": "Heart"}], "id": "78c9d8df-cb80-4336-b59c-4e8039215217", "title": "Barracuda"}], "track_count": 15, "format": "CD"}], "id": "2d69e205-205f-4693-aad7-489405c13c13"}, {"mediums": [{"position": 1, "tracks": [{"position": 8, "artists": [{"id": "bdbd48f5-abf3-4a4f-9a21-4551dbc3fde9", "name": "Heart"}], "id": "98fbca44-ce7f-439f-89e0-341f47c5184c", "title": "Barracuda"}], "track_count": 15, "format": "CD"}], "id": "219843ee-2642-46ca-9aa7-88a12f786ef0"}]}, {"id": "97815650-f4a4-3f1f-9572-bb5493342883", "releases": [{"mediums": [{"position": 1, "tracks": [{"position": 1, "artists": [{"id": "bdbd48f5-abf3-4a4f-9a21-4551dbc3fde9", "name": "Heart"}], "id": "9489ce53-d0c7-3751-97bf-10b452a6e042", "title": "Barracuda"}], "track_count": 14, "format": "CD"}], "id": "307eb8d1-2f06-42b9-b175-215e3e443f2e"}]}, {"id": "13de12aa-596f-33a7-a685-939c06f39839", "releases": [{"mediums": [{"position": 2, "tracks": [{"position": 9, "artists": [{"id": "bdbd48f5-abf3-4a4f-9a21-4551dbc3fde9", "name": "Heart"}], "id": "c0c32b52-6da0-3923-9fbb-90274401192b", "title": "Barracuda"}], "track_count": 18}], "id": 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"38a8f4a4-cd5d-4e83-8aea-199898072c5b", "releases": [{"mediums": [{"position": 1, "tracks": [{"position": 12, "artists": [{"id": "bdbd48f5-abf3-4a4f-9a21-4551dbc3fde9", "name": "Heart"}], "id": "acad842b-c149-447d-9f54-0f828deee259", "title": "Barracuda"}], "track_count": 17, "format": "CD"}], "id": "e5628bbe-8d4c-4672-b0c4-64f70b368b05"}]}, {"id": "51787d80-61c5-4f67-bf5a-9a02f2ce315f", "releases": [{"mediums": [{"position": 3, "tracks": [{"position": 11, "artists": [{"id": "bdbd48f5-abf3-4a4f-9a21-4551dbc3fde9", "name": "Heart"}], "id": "0891f76f-2212-3014-80f4-ca619e50e2e6", "title": "Barracuda"}], "track_count": 11}], "id": "de035253-b0a9-4f4d-9809-2149e0f711ee"}]}, {"id": "d26ab27f-ca3a-3a44-8df0-41cb81152301", "releases": [{"mediums": [{"position": 1, "tracks": [{"position": 9, "artists": [{"id": "bdbd48f5-abf3-4a4f-9a21-4551dbc3fde9", "name": "Heart"}], "id": "e27fa63e-65e5-38f8-bd5a-b74419edc525", "title": "Barracuda"}], "track_count": 12, "format": "CD"}], "id": "f194bc43-8498-45cd-bb9d-03b7db76a31e"}]}, {"id": "e708f388-30d8-4335-abef-06ae23fd5cd1", "releases": [{"mediums": [{"position": 1, "tracks": [{"position": 6, "artists": [{"id": "bdbd48f5-abf3-4a4f-9a21-4551dbc3fde9", "name": "Heart"}], "id": "e06a8842-f10a-3c22-bc01-790502dc4489", "title": "Barracuda"}], "track_count": 16, "format": "CD"}], "id": "f4487ab4-fa3f-43fc-ae36-fe3ed4014af2"}]}, {"id": "630f907d-3beb-3d3a-b057-f4e8ab94f441", "releases": [{"mediums": [{"position": 2, "tracks": [{"position": 12, "artists": [{"id": "bdbd48f5-abf3-4a4f-9a21-4551dbc3fde9", "name": "Heart"}], "id": "71c5991a-579c-3d1d-b6b1-c362be60ee8e", "title": "Barracuda"}], "track_count": 20, "format": "CD"}], "id": "77733eec-b960-4045-a98c-1cd6cf294504"}]}, {"id": "0ad19ace-6a82-3282-bbd9-bf63bcbd057d", "releases": [{"mediums": [{"position": 1, "tracks": [{"position": 1, "artists": [{"id": "bdbd48f5-abf3-4a4f-9a21-4551dbc3fde9", "name": "Heart"}], "id": "5f2ce7ee-8ce5-37d9-80ff-2e1a83f79417", "title": "Barracuda"}], "track_count": 17, "format": "CD"}], "id": "310dc322-898e-41b2-be8a-d448c26d842b"}]}, {"id": "d4fcdc5a-1ac0-4e07-9ede-d5a16dc1e33d", "releases": [{"mediums": [{"position": 1, "tracks": [{"position": 12, "artists": [{"id": "bdbd48f5-abf3-4a4f-9a21-4551dbc3fde9", "name": "Heart"}], "id": "86acfd09-478d-3a84-93ee-9fc56ffb4793", "title": "Barracuda"}], "track_count": 20, "format": "CD"}], "id": "0a8cfe53-2b20-46af-a49e-0ed99de5e0c0"}]}, {"id": "0164bb69-4a95-4303-9643-328559c7821e", "releases": [{"mediums": [{"position": 1, "tracks": [{"position": 10, "artists": [{"id": "bdbd48f5-abf3-4a4f-9a21-4551dbc3fde9", "name": "Heart"}], "id": "e38316a1-c1a3-3aaa-a163-251734ea9eea", "title": "Barracuda"}], "track_count": 15, "format": "CD"}], "id": "9cf4600f-8d6c-4dd9-a635-e09a74b49305"}]}, {"id": "882f2762-0a51-452b-a307-5793949fa0dd", "releases": [{"mediums": [{"position": 4, "tracks": [{"position": 7, "artists": [{"id": "bdbd48f5-abf3-4a4f-9a21-4551dbc3fde9", "name": "Heart"}], "id": "725245c2-71c4-3504-8774-160ed64bfe33", "title": "Barracuda"}], "track_count": 20, "format": "CD"}], "id": "60b77854-d26f-403e-9480-0aa2f95ca6a5"}]}, {"id": "5a35666d-c298-458d-af5a-00000f7a9aee", "releases": [{"mediums": [{"position": 3, "tracks": [{"position": 4, "artists": [{"id": "bdbd48f5-abf3-4a4f-9a21-4551dbc3fde9", "name": "Heart"}], "id": "fec08a89-ef95-33a6-bf97-fd3aa9335c22", "title": "Barracuda"}], "track_count": 20, "format": "CD"}], "id": "488d8fac-750e-46b6-9391-845a9cc42861"}]}, {"id": "fa6549ef-c472-490b-a112-2fec51e73fde", "releases": [{"mediums": [{"position": 3, "tracks": [{"position": 6, "artists": [{"id": "bdbd48f5-abf3-4a4f-9a21-4551dbc3fde9", "name": "Heart"}], "id": "13aba31b-02c1-4f12-812d-809e578a6570", "title": "Barracuda"}], "track_count": 20, "format": "Digital Media"}], "id": "b2e5c64b-6d2a-4ac9-9ff4-3fd553ab8999"}]}, {"id": "c0872930-5b59-45e1-bb7c-67e79c6186e2", "releases": [{"mediums": [{"position": 3, "tracks": [{"position": 9, "artists": [{"id": "bdbd48f5-abf3-4a4f-9a21-4551dbc3fde9", "name": "Heart"}], "id": "56376129-2b0c-44a9-9aba-f48fb542220c", "title": "Barracuda"}], "track_count": 17, "format": "CD"}], "id": "7d110cc8-e89f-4564-a576-1f5ad68b3e6c"}]}, {"id": "ad8d366c-3450-3f6a-9a14-9b254eb8f645", "releases": [{"mediums": [{"position": 1, "tracks": [{"position": 4, "artists": [{"id": "bdbd48f5-abf3-4a4f-9a21-4551dbc3fde9", "name": "Heart"}], "id": "469e69d0-37f8-3479-b75c-007e2d8075ae", "title": "Barracuda"}], "track_count": 15, "format": "CD"}], "id": "10278ad5-4d8f-4f85-bf25-15484ee898c4"}]}, {"id": "aa4a9e8d-d534-39fc-a684-4c8fb36e0201", "releases": [{"mediums": [{"position": 1, "tracks": [{"position": 2, "artists": [{"id": "bdbd48f5-abf3-4a4f-9a21-4551dbc3fde9", "name": "Heart"}], "id": "0f97c57b-a74d-32f7-8185-fc386370795d", "title": "Barracuda"}], "track_count": 20, "format": "CD"}], "id": "754c9efa-ab57-41dd-b06c-987351a72d29"}]}, {"id": "e92da246-f377-3e09-8490-87e6ab93b28d", "releases": [{"mediums": [{"position": 1, "tracks": [{"position": 2, "artists": [{"id": "bdbd48f5-abf3-4a4f-9a21-4551dbc3fde9", "name": "Heart"}], "id": "c3553879-7bfe-34e8-bcb8-e83f546b1869", "title": "Barracuda"}], "track_count": 10, "format": "CD"}], "id": "412bb07d-7f14-4bcf-8951-8fa6d80ec21a"}]}, {"id": "35bb7c1a-c848-4d6f-a5d3-cbfcf7ba6373", "releases": [{"mediums": [{"position": 1, "tracks": [{"position": 1, "artists": [{"id": "bdbd48f5-abf3-4a4f-9a21-4551dbc3fde9", "name": "Heart"}], "id": "c46a2f72-682f-4e2c-aee6-6ba5c9ac28cc", "title": "Barracuda"}], "title": "Little Queen", "track_count": 12, "format": "CD"}], "id": "b78c874a-b9aa-493a-a97b-442624f12ada"}]}, {"id": "fce39f75-a386-37af-a445-a0b0eddbc3a7", "releases": [{"mediums": [{"position": 1, "tracks": [{"position": 1, "artists": [{"id": "bdbd48f5-abf3-4a4f-9a21-4551dbc3fde9", "name": "Heart"}], "id": "d09a2a3e-ecb8-3cff-933c-5295e7a141c8", "title": "Barracuda"}], "track_count": 15, "format": "CD"}], "id": "ca6d4f35-2915-4f76-aa81-f72c1f949c80"}]}, {"id": "d863625d-31a6-4873-b466-4f4a8ece4a77", "releases": [{"mediums": [{"position": 3, "tracks": [{"position": 11, "artists": [{"id": "bdbd48f5-abf3-4a4f-9a21-4551dbc3fde9", "name": "Heart"}], "id": "f0e836f0-5649-4c76-9d3b-91cc822b48bb", "title": "Barracuda"}], "track_count": 17, "format": "CD"}], "id": "10e9f9a0-e561-4030-9cb7-0143ae76d2c4"}]}, {"id": "636a5a6f-9843-4d32-a8c5-f0636c70e4ac", "releases": [{"mediums": [{"position": 3, "tracks": [{"position": 20, "artists": [{"id": "bdbd48f5-abf3-4a4f-9a21-4551dbc3fde9", "name": "Heart"}], "id": "b60fd73c-1a8b-4fa0-8f30-394bbca85d44", "title": "Barracuda"}], "track_count": 20, "format": "CD"}], "id": "a68a89ef-5baf-4a0c-a34e-8a5dec388086"}]}, {"id": "7b167735-b947-455a-be80-1f3490420991", "releases": [{"mediums": [{"position": 1, "tracks": [{"position": 11, "artists": [{"id": "bdbd48f5-abf3-4a4f-9a21-4551dbc3fde9", "name": "Heart"}], "id": "b7401407-cef0-325d-8475-f6370eb0a732", "title": "Barracuda"}], "track_count": 16, "format": "CD"}], "id": "390905a4-6f15-48e4-8c36-233a9e92f7f8"}]}, {"id": "61e25f50-327a-3304-8608-cef5ee487fde", "releases": [{"mediums": [{"position": 2, "tracks": [{"position": 6, "artists": [{"id": "bdbd48f5-abf3-4a4f-9a21-4551dbc3fde9", "name": "Heart"}], "id": "d96562bd-5f62-3231-8676-0f0f1816db29", "title": "Barracuda"}], "track_count": 12, "format": "CD"}], "id": "4188a8e7-f6d3-46a5-b3e7-0b54bf45ed01"}]}, {"id": "f4a0589b-d361-4e90-85bd-e5665bb27e48", "releases": [{"mediums": [{"position": 1, "tracks": [{"position": 1, "artists": [{"id": "bdbd48f5-abf3-4a4f-9a21-4551dbc3fde9", "name": "Heart"}], "id": "781e4c7b-5870-45ee-a9d2-c6c95ebaf0ce", "title": "Barracuda"}], "track_count": 9, "format": "CD"}], "id": "16ca0072-7bfb-4cd1-b8fa-ec28b309595f"}]}], "id": "5805b3d7-eef0-4b96-a7dd-621695f7a35a"}, {"sources": 1, "releasegroups": [{"id": "cf18aee2-8602-344d-b69c-2d09235c3964", "releases": [{"mediums": [{"position": 1, "tracks": [{"position": 3, "artists": [{"id": "bdbd48f5-abf3-4a4f-9a21-4551dbc3fde9", "name": "Heart"}], "id": "d13f95cd-aa15-331e-85ac-38a24805a8a3", "title": "Barracuda"}], "track_count": 17, "format": "CD"}], "id": "6cea17b8-c25a-43dc-8a8c-dd26ede2e5c5"}]}], "id": "c3903d76-7692-44ff-becf-c8ffce99603f"}, {"sources": 1, "releasegroups": [{"id": "1cfdd14f-f40c-4623-a108-b98968131b30", "releases": [{"mediums": [{"position": 3, "tracks": [{"position": 3, "artists": [{"id": "bdbd48f5-abf3-4a4f-9a21-4551dbc3fde9", "name": "Heart"}], "id": "7f8e0065-188b-4960-8165-e9f6bbcfe9e5", "title": "Barracuda"}], "title": "K-DST", "track_count": 17, "format": "Digital Media"}], "id": "3da5bb7a-2b37-4be5-a358-a18504ac4be7"}]}], "id": "d8cc326b-b388-44eb-83d4-2a108e21a5f4"}], "score": 0.999736, "id": "35678d22-32a7-473e-b0f7-5e616a3b13a6"}]}

Meine JSON-Klasse:

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VB.NET-Quellcode

Imports Newtonsoft.Json
<Serializable>
Public Class Artist
<JsonProperty("id")>
Public Property Id As String
<JsonProperty("name")>
Public Property Name As String
End Class
<Serializable>
Public Class Track
<JsonProperty("position")>
Public Property Position As Integer
<JsonProperty("artists")>
Public Property Artists As List(Of Artist)
<JsonProperty("id")>
Public Property Id As String
<JsonProperty("title")>
Public Property Title As String
End Class
<Serializable>
Public Class Medium
<JsonProperty("position")>
Public Property Position As Integer
<JsonProperty("tracks")>
Public Property Tracks As List(Of Track)
<JsonProperty("track_count")>
Public Property TrackCount As Integer
<JsonProperty("format")>
Public Property Format As String
<JsonProperty("title")>
Public Property Title As String
End Class
<Serializable>
Public Class Release
<JsonProperty("mediums")>
Public Property Mediums As List(Of Medium)
<JsonProperty("id")>
Public Property Id As String
End Class
<Serializable>
Public Class Releasegroup
<JsonProperty("id")>
Public Property Id As String
<JsonProperty("releases")>
Public Property Releases As List(Of Release)
End Class
<Serializable>
Public Class Recording
<JsonProperty("sources")>
Public Property Sources As Integer
<JsonProperty("releasegroups")>
Public Property Releasegroups As List(Of Releasegroup)
<JsonProperty("id")>
Public Property Id As String
End Class
<Serializable>
Public Class Result
<JsonProperty("recordings")>
Public Property Recordings As List(Of Recording)
<JsonProperty("score")>
Public Property Score As Double
<JsonProperty("id")>
Public Property Id As String
End Class
<Serializable>
Public Class c_JSON_ROOT
<JsonProperty("status")>
Public Property Status As String
<JsonProperty("results")>
Public Property Results As List(Of Result)
End Class

..und jetzt hab ich inne List(Of String) die jeweiligen Album-Titel..also hier:

Little Queen
Shout It Out Loud
K-DST

Jetzt hab ich mein "JSON_ROOT_acoustID" mit den JSON Daten..die sollen alle durchsucht werden nach den Album-Titeln ausse List(Of String) und die Indexes der jeweiligen Klassen, also z.b.:

VB.NET-Quellcode

Select Case New List(Of Integer)(New Integer() {JSON_ROOT_acoustID.Results.IndexOf(_result),
_result.Recordings.IndexOf(_recording),
_recording.Releasegroups.IndexOf(_releasegroup),
_releasegroup.Releases.IndexOf(_release),
_release.Mediums.IndexOf(_medium)})

sollen inne neuen Liste gespeichert werden das ich durch die "IndexOf" direkt auf den Zweig zugreifen kann!

Hab bis jetzt sowas, damit bekomm ich aber alle Einträge und nicht die Distinct..und auch nicht den jeweiligen aus der Liste!

Spoiler anzeigen

Morrison · 19. Juli 2018, 18:07

Hab des Ergebnis erstmal so bekommen..aber ne Optimierung wär gut!

Spoiler anzeigen

VB.NET-Quellcode

Dim _arrList As IEnumerable(Of Integer()) = Nothing
Dim _arrList_List As New List(Of IEnumerable(Of Integer()))
For Each _medTitle In _mediumTitle
_arrList = (From _result In JSON_ROOT_acoustID.Results Where _result.Recordings IsNot Nothing
From _recording In _result.Recordings Where _recording.Releasegroups IsNot Nothing
From _releasegroup In _recording.Releasegroups Where _releasegroup.Releases IsNot Nothing
From _release In _releasegroup.Releases Where _release.Mediums IsNot Nothing
From _medium In _release.Mediums Where Not String.IsNullOrEmpty(_medium.Title) AndAlso
_medium.Title = _medTitle
Select New Integer() {JSON_ROOT_acoustID.Results.IndexOf(_result),
_result.Recordings.IndexOf(_recording),
_recording.Releasegroups.IndexOf(_releasegroup),
_releasegroup.Releases.IndexOf(_release),
_release.Mediums.IndexOf(_medium)})
_arrList_List.Add(_arrList)
Next
For Each _ListItem In _arrList_List
For Each _int In _ListItem
Debug.WriteLine(JSON_ROOT_acoustID.Results(_int(0)).Recordings(_int(1)).Releasegroups(_int(2)).Releases(_int(3)).Mediums(_int(4)).Title)
Next
Next

Nofear23m · 19. Juli 2018, 20:09

Hallo

Optimierung. Naja
Warum arbeitet man mit IndexOf wenn ich zu jeder Entität eine ID habe?

Ich kann mir ja jederzeit wenn ich einmal eine ListOf(Result) habe jederzeit die ID von dem Track mit dem Titel "XYZ" holen?

Ich denke das du hier vieleicht den Wald vor lauter Bäumen nicht mehr siehst und vieleicht unnötig mit LINQ an die Sache rangehen willst obwohl dies gar nicht notwendig ist.
Aber wie gesagt, kann auch sein das ich total auf dem schlauch stehe.

Oder gehts einfach darum das du das unbedingt in nur einer Anweisung hast?

Grüße
Sascha

Morrison · 19. Juli 2018, 20:29

*hehe* ..kann schon sein das ich den Wald vor lauter Bäumen nicht sehe..

Es geht mir hier ja um eine Suchfunktion..das wenn ich nach einem Album-Titel in der JSON-Klasse suche will ich mir alle Einträge mit dem Suchwert anzeigen lassen..

Manche JSON-Einträge haben manchmal kein Album-Name, manche kein Titel-Name usw.
So möchte ich nach den Einträgen suchen wo alle für mich erforderlichen Daten vorhanden sind und die anderen vernachlässigen..
kA. obs da ne einfachere Filterfunktion gibt!?

Nofear23m · 20. Juli 2018, 07:31

Guten morgen

Ja, wenn die Daten nicht "korrekt" vorliegen, doppelt vorhanden sind, oft leer sind würde ich persönlich ja hingehen und das erstmal erledigen.
Bau dir eine Funktion welche die für dich irrelevanten Daten rausnimmt.

Dann bau dir evtl. Hilfsfunktionen in die Klasse Result.
ICH würde ja sogar eine eigene Klasse bauen. Die Klassen die du hast sind nach dem JSon gebaut. Sind aber jetzt nicht ideal für dich.
Mach dir vieleicht ein Klasse in welcher du einfach die Properties drinnen hast di du brachst, und zwar in einer ebene. (Titel, Album, Interpret, ...).
Die befüllst du 1 mal und hast alles "griffbereit".

Grüße
Sascha

Linq suche / Liste mit Listeneintrag vergleichen und selektieren

Linq suche / Liste mit Listeneintrag vergleichen und selektieren

VB.NET-Quellcode

VB.NET-Quellcode

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