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copied!<p>Place the <a href="http://msdn.microsoft.com/en-us/library/system.web.ui.scriptmanager.aspx" rel="nofollow">ScriptManager</a> control on your page and add a reference to your <code>.asmx</code> service:</p> <pre><code><asp:ScriptManager ID="myManager" runat="server"> <Services> <asp:ServiceReference Path="~/MyService.asmx" /> </Services> </asp:ScriptManager> </code></pre> <p>In the code-behind of your web-service declare you web method (notice the <a href="http://msdn.microsoft.com/en-us/library/system.web.script.services.scriptserviceattribute.aspx" rel="nofollow">ScriptService</a> attribute):</p> <pre><code>namespace MyServices { [WebService(Namespace = "http://tempuri.org/")] [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)] [System.ComponentModel.ToolboxItem(false)] [ScriptService] public class MyService : System.Web.Services.WebService { [WebMethod] public string SayHello(name) { return "Hello, " + name; } } } </code></pre> <p>Now you can consume the web-service from the Javascript like the following:</p> <pre><code>function queryWebService() { MyServices.MyService.SayHello('Bobby', function(result, userContext) { alert('Web-service response: ' + result); }, function(result) { alert('Error!'); }); } </code></pre> <p><strong>UPDATE</strong></p> <p>If you want to consume the web-service by simply sending an HTTP GET requests then you can do the following:</p> <p>Decorate your web-method with a <a href="http://msdn.microsoft.com/en-us/library/bb298830.aspx" rel="nofollow">ScriptMethod</a> attribute:</p> <pre><code>[WebMethod] [ScriptMethod(UseHttpGet = true)] public string SayHello(name) { return "Hello, " + name; } </code></pre> <p>Notice the <a href="http://msdn.microsoft.com/en-us/library/system.web.script.services.scriptmethodattribute.usehttpget.aspx" rel="nofollow">UseHttpGet</a> property which is set to <code>True</code>. You probably also need to modify the <code>web.config</code> file to allow this kind of interaction:</p> <pre><code><webServices> <protocols> <add name="HttpGet"/> </protocols> </webServices> </code></pre> <p>Now you can make a simple HTTP GET request to your web-service like shown below (the example uses <a href="http://api.jquery.com/jQuery.ajax/" rel="nofollow">jQuery.ajax</a>):</p> <pre><code>$.ajax({ url: "/MyService.asmx/SayHello?name=Bobby", success: function(transport) { alert('Web-service response: ' + transport.responseText); } }); </code></pre> <p>Hope this will help you.</p>

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