Question

advise on type of page to recieve xml response

Asked by: newbie27

hello experts

i have a situation where i have to receive XML response from one the client when they dispatch our orders electronically...

i have to have some sort of service on my asp.net (vb.net) website to actively wait and recieve any thing as xml file.

please can someone advise how can i go about doing this? i have no idea of how to implement web service and i wonder if there is any other way i can achieve this?

please advise

thanks
s

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Asked On
2009-10-19 at 08:54:47ID24823951
Topics

Programming for ASP.NET

,

Microsoft Visual Basic.Net

,

Microsoft IIS Web Server

Participating Experts
2
Points
500
Comments
4

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Answers

 

by: techExtremePosted on 2009-10-19 at 10:07:15ID: 25606970

Ya, just ask them to post the xml to one of your page.

For example your page is getClientXml.aspx
Now they using their website, create a xml and post it to your page

On  your page, when the code runs, it gets the file in response and reads it based on the xml schema that you already have agreed upon and process the result accordingly.
This is the easiest way and you can make it more secure and as complicated as you need.
Hope it helped.

 

by: newbie27Posted on 2009-10-19 at 12:37:35ID: 25608248

Hello techExtreme

Thanks for your advise, I am trying to write simple vb.net code snippet to recieve, parse and send response, I wonder if you can please help me in this?

I recieve despatchnotification.xml file from the client, i have to parse it extract "businessid" node value and do some DB insert .... and finally sends a response back...

i have added bott the files in .txt extrensions please rename them to .xml


I think I can use the following for response.....
==========
 Dim Url As String = "http://localhost:1033/Default.aspx"
        Dim Request As HttpWebRequest = System.Net.WebRequest.Create(Url)
        Request.Method = "POST"
        Request.ContentType = "text/xml"
        Using OWriter As New System.IO.StreamWriter(Request.GetRequestStream())
            OWriter.WriteLine("<request>Hello World!</request>")
        End Using
        Using Response = Request.GetResponse()
            Dim IText As String
            Using IReader As New System.IO.StreamReader(Response.GetResponseStream())
                IText = IReader.ReadToEnd()
            End Using
        End Using
-===========================================

using the attached funcitons if we can use, please can you advise how i can go about writing the code?

thank you
PS: if you want me to open a new question please do let me know ....

 Sub ProcessRequest(ByVal context As HttpContext) Implements IHttpHandler.ProcessRequest
        Dim IText As String
        Using IReader As New StreamReader(context.Request.InputStream)
            IText = IReader.ReadToEnd()
        End Using
        ' TODO: 1. Parse request
        '       2. Process request
        '       3. Send response
        context.Response.ContentType = "text/xml"
        context.Response.Write("<response>Hello World!</response>")
    End Sub
 
    ReadOnly Property IsReusable() As Boolean Implements IHttpHandler.IsReusable
        Get
            Return False
        End Get
    End Property

                                              
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by: Snarf0001Posted on 2009-10-19 at 12:38:13ID: 25608255

Webservices / wcf are certainly a nice way of wrapping it up, but if you don't want to tackle that, use an .ashx file instead of an .aspx.

functionaly they're the same, but the ashx is expecting you to handle all the request / response yourself (which you would be) and has far less overhead than an aspx.

 

by: techExtremePosted on 2009-10-19 at 12:52:23ID: 25608360

Here's a tutorial regarding parsing xml file using vb.net
http://www.codeproject.com/KB/cpp/parsefilecode.aspx

As Snarf has suggested, you can use .ashx file also, but if you are a beginner, I'd suggest first try out the basic page stuff, then go advanced.

For streaming back xml file to client (if you require it later on) , refer this tutorial
http://www.primaryobjects.com/CMS/Article76.aspx

especially the section 'Streaming XML to the Web Browser'

Happy Coding!

20120131-EE-VQP-002

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