How to parse json and read in vb.net

I have this code in my project:

Dim request As HttpWebRequest
Dim response As HttpWebResponse = Nothing
Dim reader As StreamReader
request = DirectCast(WebRequest.Create(""), HttpWebRequest)
response = DirectCast(request.GetResponse(), HttpWebResponse)
reader = New StreamReader(response.GetResponseStream())
Dim rawresp As String
rawresp = reader.ReadToEnd()
textbox2.text = rawresp

and TextBox2 gets the JSON code correctly.

and this is my JSON code example:

{ "id":174543706, "first_name":"Hamed", "last_name":"Ap", "username":"hamed_ap", "type":"private"
}

My question:

How to get 174543706 from JSON code ("id") into TextBox3.Text???

2

5 Answers

You could use JavaScriptSerializer which is in System.Web.Script.Serialization.

Imports System.Web.Script.Serialization
Module Module1 Sub Main() Dim s As String Try Dim rawresp As String = "{""id"":174543706,""first_name"":""Hamed"",""last_name"":""Ap"",""username"":""hamed_ap"",""type"":""private""}" Dim jss As New JavaScriptSerializer() Dim dict As Dictionary(Of String, String) = jss.Deserialize(Of Dictionary(Of String, String))(rawresp) s = dict("id") Catch ex As Exception End Try End Sub
End Module

9

try this code :

Dim jsonResulttodict = JsonConvert.DeserializeObject(Of Dictionary(Of String, Object))(rawresp)
Dim firstItem = jsonResulttodict.item ("id") 

hope it help you !!

2

How to get 174543706 from JSON code ("id") into TextBox3.Text?

{ "id": 174543706, "first_name": "Hamed", "last_name": "Ap", "username": "hamed_ap", "type": "private"
}

Sorry if my reply was late. I hope my answer can help someone who's still confused. So what you do was get the response and read the JSON.

After you do ReadToEnd():

Dim xr As XmlReader = XmlReader.Create(New StringReader(rawresp))
Dim doc As XmlDocument = New XmlDocument()
doc.LoadXml(rawresp)

Then What you need to do is to read the data from the response. you do like this:

Dim res As String = JsonConvert.SerializeXmlNode(doc)
Dim ThisToken As JObject = Newtonsoft.Json.JsonConvert.DeserializeObject(Of JObject)(res)
Dim response As String = ThisToken("response").ToString()
Dim ThisData As JObject = Newtonsoft.Json.JsonConvert.DeserializeObject(Of JObject)(response)

After that yo can get the data from the response and convert it into string

Dim idx As String = ThisData("id").ToString()
// the value of idx will be: 174543706

Then last you can put it into Texbox3.Text.

JSON can be parsed using adding Newtonsoft.Json.dll reference

Code :

Imports System.Net
Imports Newtonsoft.Json.Linq
Public Class Form1 Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12 Dim json As String = New System.Net.WebClient().DownloadString("") Dim parsejson As JObject = JObject.Parse(json) Dim thedate = parsejson.SelectToken("date").ToString() txt1.Text = "Date Is "+thedate End Sub
End Class

Reference : Narendra Dwivedi - Parse JSON

This works:

Dim request As HttpWebRequest
Dim response As HttpWebResponse = Nothing
Dim reader As StreamReader
request = DirectCast(WebRequest.Create(""), HttpWebRequest)
response = DirectCast(request.GetResponse(), HttpWebResponse)
reader = New StreamReader(response.GetResponseStream())
Dim rawresp As String
rawresp = reader.ReadToEnd()
textbox2.text = JObject.Parse(rawresp)("id")

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