ReferenceError: json is not defined when AJAX call the server method

Question

I want to call the server method through the AJAX call. But when I am click the button and call the AJAX function at that time it shows an error.

Here is my code

<input type="button" id="btn_findsubmit" value="Edit" class="button" />

$(document).on("click", "#btn_findsubmit", function (e) {
    var c = $find("<%=cmbobx_search.ClientID %>");
    $.ajax({
        type: "POST",
        url: "schoolregistration.aspx/GetSchoolName",
        data: json.stringify({ schoolname: c.get_textboxcontrol().value }),
        contenttype: "application/json; charset=utf-8",
        datatype: "json",
        success: OnSuccessGetSchoolName,
        failure: function () {
            alert("error! try again...");
        }
    });
});

[WebMethod] [ScriptMethod]

public static string GetSchoolName(string schoolName){
   //Here is the code
}

Now when I click the button at that time JavaScript button click event is working but the ajax method do not calling the server method GetSchoolName (I know by doing debug mode).

And throws a error that:

ReferenceError: json is not defined

I'm voting to close this question as off-topic because it looks like either a typographical error, or a rather localised question that may have been abandoned without an answer. — halfer
– halfer, Commented Oct 17, 2017 at 17:34

michelle vu · Accepted Answer · 2017-07-08 05:37:43Z

5

It should be JSON.stringify, not json.stringify

answered Jul 8, 2017 at 5:37

michelle vu

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9 Comments

Wesley Smith Over a year ago

probly best as a comment

bugwheels94 Over a year ago

@DelightedD0D But what if that's an answer?

Wesley Smith Over a year ago

@bugwheels94 it is the "answer" but this is is simple typographical error. Generally, we'd just comment the answer and close the question as it has no future value

Death-is-the-real-truth Over a year ago

@DelightedD0D i agreed with you.But every-one doing this (answer any-how). Only some people follow what you said.So leave it.

s.k.Soni Over a year ago

@michelle if I am doing the JSON.stringify then it coming other error i.e. "TypeError: c.get_textboxcontrol is not a function". Now whats going wrong???

|

Mudasir Younas · Accepted Answer · 2017-07-08 06:50:06Z

 <input type="button" id="btn_findsubmit" value="Edit" class="button" />

<script>

    $(document).on("click", "#btn_findsubmit", function (e) {

        $.ajax({
            type: "POST",
            url: "Default.aspx/GetSchoolName",
            data: JSON.stringify({ schoolName: "school name" }),
            contentType: "application/json; charset=utf-8",
            datatype: "json",
            success: function (data) {
                alert(data.d);
            },
            failure: function () {
                alert("error! try again...");
            }
        });
    });

</script>


 [WebMethod]
 public static string GetSchoolName(string schoolName)
  {
     //Here is the code
     return "success";
  }

first of all it must be JSON.stringify not json.stringify, second it must be contentType not contenttype third the name of parameters in [WebMethod] must be same as in your ajax data. in this case schoolName not schoolname. hope it help you.

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