How can I add a web reference to an externally hosted web service in my c# web application?

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Hey programmers!!!

While adding a web reference to an externally hosted asmx webservice I am getting an error "Value cannot be null.
Parameter name: discoveryError & mexError". And the button "Add reference" appearing disabled. Kindly help me people.

Posted 26-Oct-14 20:46pm

Member 10763473

Updated 8-Oct-18 21:34pm

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Solution 2

Goto internet properties --> LAN settings --> Advanced --> Add the IP to (do not use proxy for address) in pc where reference is added . Issue resolved.

Posted 8-Oct-18 21:34pm

Member 14012747

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Member 10763473 · Accepted Answer · 2014-10-29T18:23:00

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I've found the solution.  And let me share the solution so that it can benefit others.
We have to change the web.config file of the project. Just add these tags in web.config file.

<system.net>
  <defaultProxy useDefaultCredentials="true">
  <proxy proxyaddress="http://direct.data.com/cmv/cmv.asmx"  bypassonlocal="True"/>
  </defaultProxy>
  </system.net>

And Then create the object of the service reference like this(in .aspx.cs file).

reference_Name.Service_NameSoapClient object_name =
 new reference_Name.Service_NameSoapClient();

And then call the web method like this.

object_name.method_name(parameter1,parameter2);

Here I've made the explanation generic by using reference_Name,Service_Name, object_name
These are not keywords :)