Hello folks!!!!!!!!!!!
I am back. From the last 2 days I have been working on SOAP Protocol because there was a requirement in my Project that I have to access a webservice by its URL. So that means, I could not create a web reference of that web service to add in my project. So, I decided to use SOAP protocol, but still I ran into problems in the SOAP headers. Then, I ran into a post of one my very good friend
Vinit Jain and his post on that
http://blog.codergenie.com/post/Call-a-webservice-dynamically-without-webreference.aspx.
Now, it cleared some concepts to use a webservice using HTTP POST method, because its nothing but a simple WebResponse in XML format. So, I have this function Verify in my webservice which takes two parameters, A & B. Thus,
<WebMethod()> _
Public Function Verify(ByVal AccountNumber As String, ByVal ProductName As String) As String
Return "Allowed"
End Function
Thus it will return "Allowed". Now, I was still having problem in the method my friend Vinit was suggesting and that was I was getting 500 Internal Server Error. And it, usually comes when a webrequest is not availabel. So, again I gone into RnD digging into the things on how to resolve it. Then somewhere, I found that to enable webservice to listen HTTP POST request you have to turn on the HTTP POST verb in the webservice's Web Config. So that means, In <system.web>
<customErrors mode="Off"/><
webServices>
<protocols>
<add name="HttpPost"/> </protocols>
</webServices>
This will enable the POST verb in the webservice. But somehow, now the Response of the webrequest is getting stuck. So I created a new method to work on this issue. Now a webservice with Parameters can be accessed via URL we all know that. Like in this case, http://consultflux.com/Verify/Verification.asmx/Verify?AccountNumber=3223&ProductName=876
Now in the coding part what I did is,
Try
Dim str As String = ""
Dim objUrl As New System.Uri("http://consultflux.com/Verify/Verification.asmx/Verify?AccountNumber=3223&ProductName=876")
Dim objWebReq As System.Net.WebRequest
Dim objResp As System.Net.WebResponse
Dim sReader As System.IO.StreamReader
Try
objWebReq = System.Net.WebRequest.Create(objUrl)
objResp = objWebReq.GetResponse
sReader = New System.IO.StreamReader(objResp.GetResponseStream)
str = sReader.ReadToEnd.ToString()
sReader.Close()
objResp.Close()
Catch ex As Exception
str = ex.ToString()
Finally
objWebReq = Nothing
End Try
Return str
Catch ex As Exception
Return ex.ToString()
End Try
Now what happens here is we create a webrequest on that specified URL or URI to be exact, and get the response back to us. We then use the response to read by streamreader and put all the data in a string. The data will come in XML format as:
<?xml version="1.0" encoding="utf-8" ?><string xmlns="http://tempuri.org/">Allowed</string>
And this is what we wanted. We accessed a remote webservice via its URL and its function parameters and got our result back. Now their is some limitation,
So, I think we are done here. Thanks for taking a look.
Disclaimer: All these posts are my personal thoughts and understandings developed while working. If you need to use any code from my post, please, do it at your own risk. I shall not be held responsible for any kind of security or data risk you may or may not face.
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