jquery calls WebService and WebService output JSON

(Environment: vs2008+jquery1.2.3)

It is found that the. NET comes with Ajax.NET using WebService output is JSON, where the key is when requested: Content-type:application/json;utf-8

So we just need to add a content-type:application/json;utf-8 to the post.

$.ajax({
　　　type: "POST",
　　　contentType:"application/json;utf-8",
　　　url: "/Server/PicLib.asmx/HelloWorld",
　　　success: function(msg){
　　　var json = eval('(' + msg + ')');
　　　alert(json.d);}
});


var json = eval('(' + msg + ')');

(This is to convert the returned character value to a JSON object so that you can manipulate the JSON correctly, and you can use a try to catch the error, because if the returned string is not standard JSON, it will go wrong.) ）

The above JS to run successfully need to do a set of. NET to "WebService output JSON"

Modify WebService, import a property

<System.Web.Script.Services.ScriptService()>

<System.Web.Script.Services.ScriptService()> _
<System.Web.Services.WebService(Namespace:="http://tempuri.org/") > _
<System.Web.Services.WebServiceBinding (ConformsTo:=WsiProfiles.BasicProfile1_1)> _
<ToolboxItem(False)> _
Public Class WebService1
　　　 Inherits System.Web.Services.WebService

　　　 <WebMethod()> _
　　　 Public Function HelloWorld(ByVal str As String, ByVal name As String) As String
　　　　　　　 Return str & name
　　　 End Function

End Class

Add in Webconfig:

　　<remove　verb="*"　path="*.asmx"/>
　　<add　verb="*"　path="*.asmx"　 validate="false"　 type="System.Web.Script.Services.ScriptHandlerFactory,　 System.Web.Extensions,　Version=3.5.0.0,　Culture=neutral,　 PublicKeyToken=31BF3856AD364E35"/>