How to make a method of a web service class accessible through the internet?

First create asmx class file and in that file write this below code web service method ///

/// Summary description for CommonWebService ///

[WebService(Namespace = "http://microsoft.com/webservices/")] [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)] [System.ComponentModel.ToolboxItem(false)] // To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line. [System.Web.Script.Services.ScriptService] public class CommonWebService : System.Web.Services.WebService { BaseBL objBaseBL = new BaseBL(); public CommonWebService() { //Uncomment the following line if using designed components //InitializeComponent(); } //Retrieve record or fetch data on Enitity name and field name [WebMethod, ScriptMethod(ResponseFormat = ResponseFormat.Json, UseHttpGet = false)] public string RetrieveRecordExists(string name, string entity) { string result = ""; DataSet ds = new DataSet(); ds = objBaseBL.RetrieveRecordExists(name, entity); if (ds != null) { result = ReturnJson.GetJson(ds); } return result; } } /// call this method with java script and jason

By qualifying the method with the WebMethod attribute.