Failing to Pass String Parameters in a jQuery ajax call to an ASP.NET webmethod

Question

I am having some issues with Passing Parameters in a jQuery ajax call to an ASP.NET webmethod and it is BUGGING me all day long.

I've seen the solution of how it is being done and yet it is not working for me.

Here is some code:

function GetString() {

    var name = "yan";
    var fam = "key";
    alert(name + " " + fam);

    $.ajax
({
    type: "GET",
    url: "'Services/MyService.asmx/returnString",
    dataType: "json",
    //data: "{ 'fname' : '" + name + "' , 'lname' : '" + fam + "'}",
    //data: "{ 'fname' : 'name' , 'lname' : 'fam'}",
    //data: '{"fname":"Chris","lname":"Brandsma"}',
    data: "{'fname':'Chris','lname':'Brandsma'}",
    contentType: "application/json; charset=utf-8",
    error: function (jqXHR, textStatus, errorThrown)   //what to do if fails
    {
        alert('bad, ' + errorThrown + ", " + jqXHR.responseText + ", " + textStatus);
    },
    success: function (data)           //what to do if succedded
    {
        alert(data.d);
    }
});

}

[WebMethod]
[ScriptMethod(UseHttpGet = true)]
public string returnString(string fname, string lname)
{
    return ("my name is " + fname + " " + lname);
}

and that's the error I get: Error: responseText:

You can see that I've tried several ways of accomplishing it, none worked. Can anybody point the mistake/ suggest another solution???

thanks in advance

Is webmethod on an aspx page or webservice, because aspx's webmethod does not support GET. — Rab Khan
– Rab Khan, Commented Jan 27, 2013 at 16:44
try data: {firstName:"Chris",lastName:"Brandsma"}instead of data: "{'firstName':'Chris','lastName':'Brandsma'}" — mamdouh alramadan
– mamdouh alramadan, Commented Jan 27, 2013 at 16:44
I have created a webservice and the C# code is written in that file. so I guess its not an aspx but a webservice... — Yanker
– Yanker, Commented Jan 27, 2013 at 16:54
@mamdouh - it still doesn't work and fires the error: alert("bad") :( — Yanker
– Yanker, Commented Jan 27, 2013 at 16:55

Yanker · Accepted Answer · 2014-07-28 04:54:24Z

After I've been trying in the last 24 hours, I've finally succeded :) Here's how it goes:

Code Behind:

[WebMethod]
[ScriptMethod(UseHttpGet=false)]
public string returnString2(string fname, string lname)
{
    return "{ \"FirstName\" : "\" + fname + "\" , \"LastName\" : "\" + lname + "\"}";
}

Notice that the (UseHttpGet=false)

Jquery:

function GetString2() {

    var name = "yan";
    var fam = "key";
    alert(name + " " + fam);

    $.ajax
({
    type: "POST",
    url: 'Services/MyService.asmx/returnString2',
    dataType: "json",
    data: JSON.stringify({ fname: "yan" , lname: "key" }),
    contentType: "application/json; charset=utf-8",
    error: function (jqXHR, textStatus, errorThrown)   //what to do if fails
    {
        alert('bad, ' + errorThrown + ", " + jqXHR.responseText + ", " + textStatus);
    },
    success: function (data)           //what to do if succedded
    {
        alert(data.d);
        var person = $.parseJSON(data.d);
        alert(person.FirstName);
    }
});

}

Notice how type:"Post" and that data line are changed

Thanks everyone who tried to help, all of you contributed a little bit :)

Michael Kalika · Accepted Answer · 2013-01-28 09:38:57Z

1

In your code change

    type: "GET",

to

    type: "POST",

answered Jan 28, 2013 at 9:38

Michael Kalika

2512 silver badges10 bronze badges

2 Comments

Yanker Over a year ago

I already gave it a try.. In addition, in my code behind I have [ScriptMethod(UseHttpGet = true)] doesn't that mean that I should've used type: "GET" in the first place?!?! Anyway, I've tried another suggestion, which didn't comply as well: data: JSON.stringify({ fname: "yan" , lname: "key" }),

Phil Over a year ago

When you have no parameters, "GET" works. When you have a parameter, "POST" work but "GET" does not. Please, explain why.

Collectives™ on Stack Overflow

Failing to Pass String Parameters in a jQuery ajax call to an ASP.NET webmethod

2 Answers 2

Comments

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related