VB.NET

Firebase PATCH - Updating Data

See more Firebase Examples

Uses the PATCH method to update record with new information. The data used in this example is at Chilkat Firebase Pigs Database, and is shown here:

VB.NET

Dim success As Boolean = False

' Uses the PATCH method to update a Firebase record.

' This example requires the Chilkat API to have been previously unlocked.
' See Global Unlock Sample for sample code.

' This example assumes a JWT authentication token, if required, has been previously obtained.
' See Get Firebase Access Token from JSON Service Account Private Key for sample code.

' Load the previously obtained Firebase access token into a string.
Dim fac As New Chilkat.FileAccess
Dim accessToken As String = fac.ReadEntireTextFile("qa_data/tokens/firebaseToken.txt","utf-8")
If (fac.LastMethodSuccess <> True) Then
    Debug.WriteLine(fac.LastErrorText)
    Exit Sub
End If


Dim rest As New Chilkat.Rest

' Make the initial connection (without sending a request yet).
' Once connected, any number of requests may be sent.  It is not necessary to explicitly
' call Connect before each request.  
success = rest.Connect("chilkat.firebaseio.com",443,True,True)
If (success <> True) Then
    Debug.WriteLine(rest.LastErrorText)
    Exit Sub
End If

Dim authGoogle As New Chilkat.AuthGoogle
authGoogle.AccessToken = accessToken
rest.SetAuthGoogle(authGoogle)

' Chilkat's sample data (pig-rescue data) is publicly readable at: https://chilkat.firebaseio.com/.json
' This data is publicly readable, but not writable.  You'll need to 
' run against your own database..

' We're going to update "Molly II" to "Molly III"
Dim pigNameUpdate As New Chilkat.JsonObject
pigNameUpdate.AppendString("name","Molly III")

' The string content of the last arg passed is  {"name":"Molly III"} 
Dim jsonResponse As String = rest.FullRequestString("PATCH","/pig-rescue/animal/-KI3bD-FU_Dake7sYOiP.json",pigNameUpdate.Emit())
If (rest.LastMethodSuccess <> True) Then
    ' Something happened in the communications (either no request was sent, or no response was received.
    ' (The Chilkat REST API also has lower-level methods where an app can send the request in one call,
    ' and then receive the response in another call.)
    Debug.WriteLine(rest.LastErrorText)
    Exit Sub
End If


' Check the response status code.   A 200 response status indicates success.
If (rest.ResponseStatusCode <> 200) Then
    Debug.WriteLine(rest.ResponseStatusText)
    Debug.WriteLine(jsonResponse)
    Debug.WriteLine("Failed.")
    Exit Sub
End If


' When successful, the response contains the data written.
Debug.WriteLine(jsonResponse)
Debug.WriteLine("Success.")