When I am adding the \"Web Reference\" we are giving the address to the asmx page to visual studio.
How Can I set this at run time?
Just set the Url property of the object before you call any of the service methods:
YourService service = new YourService();
service.Url = "http://some.other.url/";
// Now you're ready to call your service method
service.SomeUsefulMethod();
YourWebService service = new YourWebService();
service.Url = "http://www.example.com/YourWebService.asmx";
service.CallMethod();
I would have upvoted one of the other answers - they're almost correct.
using (YourService service = new YourService())
{
service.Url = "http://some.other.url/";
// Now you're ready to call your service method
service.SomeUsefulMethod();
}
If a using block is not used, and an exception is thrown, then resources like network connections can be leaked.