How do I call methods in an .asmx service

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I am trying to call the HelloWorld method that is created by visual studio when you create a new asmx web service.

I have added the *.asmx.cs file to the App_Code folder of the test site and the .asmx file to the sites root. If I go to testserver/Service1.asmx I see the page that list the services methods.

If I try testserver/Service1.asmx/HelloWorld I get an error. How can I get the service running or call the HelloWorld method.

I have spent two and a half days googling, reading and watching videos trying to figure I out what I need to do or what I am doing wrong.

Posted 12-Jun-14 5:27am

jmallory0001

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Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) 12-Jun-14 12:01pm

What is that error?

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Yvan Rodrigues · Accepted Answer · 2014-06-12T06:06:00

The service is running, you're just not accessing it correctly.

You're probably getting an error like: Request format is unrecognized for URL unexpectedly ending in '/HelloWorld'.

Web services don't (necessarily) behave like regular web pages do. For example, when you navigate to a web page your browser is performing a GET request.

The Hello World web service goes not allow GET requests. If you go to http://localhost:8801/Service1.asmx?op=HelloWorld (change the port to whatever port your service is running on) you will get a page like this:

<img src="http://www.codeproject.com/script/Membership/Uploads/1740717/Screenshot_2014-06-12_12.01.53.png" width="600" />

It shows you three different ways to interact with your web service.

If you click the Invoke button, your browser will perform a POST request, which is what the web service is expecting.

I recommend using Fiddler[^] to construct queries that you can send to a web server, and see the raw response.