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asp.net - How to call external webservice using jquery "jsonp"?

I had a previous question can jquery ajax call external webservice?


and some good developers answered me to use jsonp, but i don't know how to use it, i am trying to call my service using this code:

$.ajax({
            type: "POST",
            url: "http://localhost:1096/MySite/WebService.asmx?callback=?",
            data: "{}",
            contentType: "application/json; charset=utf-8",
            dataType: "jsonp",
            success: function(msg) {alert(msg);}
            });


and this is my service code:

[WebMethod]
public string HelloWorld() {
    return "Hello World " ;
}


anyone have examples or can explain this issue for me?

UPDATE:
I wrote the code again to be like this:

$.getJSON("http://localhost:1096/YourShoppingTest1/WebService.asmx/HelloWorld?jsonp=?",{name:"test"},
    function(data){
    alert(data.x);
    });


and the service like this:

[WebMethod]
public string HelloWorld(string name)
{
    return "( {"x":10 , "y":100} )";
}


But it always give me this error when back: "missing ; before statement [Break on this error] ( {"x":10 , "y":100} )"

and never call the success function, can anyone help with that?

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1 Answer

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by (71.8m points)

I've had a similiar problem, unfortunately I don't have the code at hand.

From memory:

See: What are some good examples of JQuery using JSONP talking to .net? & What is the best way to call a .net webservice using jquery?


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