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''Code to Send Http JSON POST request
''Get the response from the server

Imports System.Collections.Generic
Imports System.Linq
Imports System.Text
Imports System.Net
Imports System.IO
Module Module1

Sub Main()

Dim JsonData As String = "{""type"":""Point"",""coordinates"":[-105.01628,39.57422]}"
Dim myRequest As HttpWebRequest = PostJSON(JsonData)

Console.WriteLine("Response of Request:{0}", GetResponse(myRequest))

Console.ReadKey()
End Sub

Private Function PostJSON(ByVal JsonData As String) As HttpWebRequest
Dim objhttpWebRequest As HttpWebRequest
Try
Dim httpWebRequest = DirectCast(WebRequest.Create("http://geojsonlint.com/"), HttpWebRequest)
httpWebRequest.ContentType = "text/json"
httpWebRequest.Method = "POST"

Using streamWriter = New StreamWriter(httpWebRequest.GetRequestStream())


streamWriter.Write(JsonData)
streamWriter.Flush()
streamWriter.Close()
End Using

objhttpWebRequest = httpWebRequest

Catch ex As Exception
Console.WriteLine("Send Request Error[{0}]", ex.Message)

Return Nothing
End Try

Return objhttpWebRequest

End Function

Private Function GetResponse(ByVal httpWebRequest As HttpWebRequest) As String
Dim strResponse As String = "Bad Request:400"
Try
Dim httpResponse = DirectCast(httpWebRequest.GetResponse(), HttpWebResponse)
Using streamReader = New StreamReader(httpResponse.GetResponseStream())
Dim result = streamReader.ReadToEnd()

strResponse = result.ToString()
End Using
Catch ex As Exception
Console.WriteLine("GetResponse Error[{0}]", ex.Message)

Return ex.Message
End Try

Return strResponse

End Function

End Module
     
 
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