Request and Response in Visual Basic

Submitted by Yorkiebar on Sunday, May 18, 2014 - 21:04.

Introduction: This is a simple tutorial on how to use the System.Net namespace in Visual Basic to send a request and receive a response from a server. Imports: First we need to import the namespace. This enables us to use the required functions and classes...

Imports System.Net

Request: To send a request we first create an object of HTTPWebRequest...

Dim req As HttpWebRequest

We then set that object equal to a new HTTPWebRequest with the function of '.Create()' while parsing it the server URL, in this case, Bing...

req = HttpWebRequest.Create("http://www.bing.com")

Response: Next we create an object to hold the response. This object is the type of HTTPWebResponse...

Dim res As HttpWebResponse

Next we set the response object to the request's response...

res = req.GetResponse()

Done!: From now on we can use that response to do things such as get the source of the response (web page from the request server)...

Using reader As New System.IO.StreamReader(res.GetResponseStream())
    MsgBox(reader.ReadToEnd()) 'Source
End Using

Full Source: Here is the full source file...

Imports System.Net
 
Class Form1
 
    Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        Dim req As HttpWebRequest
        req = HttpWebRequest.Create("http://www.bing.com")
        Dim res As HttpWebResponse
        res = req.GetResponse()
        Using reader As New System.IO.StreamReader(res.GetResponseStream())
            MsgBox(reader.ReadToEnd()) 'Source
        End Using
    End Sub
End Class

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