In this SO post I learned how to get a return value from an AJAX call:
function CallIsDataReady(input) {
$.ajax({
url: "http://www.blah.com/services/TestsService.svc/IsDataReady",
type: "GET",
contentType: "application/json; charset=utf-8",
data: input,
dataType: "json",
success: function (data) {
if (!data) {
setTimeout(function (inputInner) { CallIsDataReady(inputInner); }, 1000);
}
else {
//Continue as data is ready
callUpdateGrid(input);
}
}
});
}
$(document).ready(function () {
var input = { requestGUID: "<%=guid %>" };
CallIsDataReady(input);
});
This function calls its web service wich does return true. The problem is that inside the following callUpdateGrid, the logging shows that that web service method is not getting called from the $.ajax call:
function callUpdateGrid(input) {
console.log(input);
$.ajax({
url: "http://www.blah.com/services/TestsService.svc/GetContactsDataAndCountbyGUID",
type: "GET",
contentType: "application/json; charset=utf-8",
data: input,
dataType: "json",
success: function (data) {
var mtv = $find("<%= RadGrid1.ClientID %>").get_masterTableView();
console.log(data);
mtv.set_dataSource(data.d.Data);
mtv.dataBind();
}
});
}
Anyone know what is wrong?
It is always a good idea to include an error handler function as one of the options passed to $.ajax. For example, add this code after your success functions:
,
error: function(jqXHR, textStatus, errThrown) {
console.log("AJAX call failed");
console.log(errThrown);
}
That will log at least a bit of information if the $.ajax call doesn't succeed.
EDIT
According to your comment, this logs
SyntaxError: Invalid character
And in fact, I now see that you are giving a plain JavaScript object as the data option passed to $.ajax, but indicating that it is a JSON object in the dataType field. You need to actually convert the input object into JSON yourself, like so:
data: JSON.stringify(input),
dataType: 'json',
Alternatively, you could simply format input as a JSON object in first place, like so:
var input = { "requestGUID": "<%=guid %>" };
The quotes around the field name requestGUID are sufficient, in this case, to give you a JSON object.
Related
I'm building a program that searches documents in ASP.NET Core. I'm passing the search data from a text box to the controller through an Ajax request but the controller isn't receiving the string.
I've tried changing how the ajaxData field is defined, adding quotations around 'search' and even turning the whole thing into a string but I can't get it to pass to the controller.
This is the code for the request:
ajaxData = {search: $("#textSearchBox").val()}
console.log(ajaxData);
$.ajax({
type: 'POST',
url: "#Url.Action("GetDocuments", "DocumentSearchApi")",
data: ajaxData,
dataType: "json",
contentType: "application/json; charset=utf-8",
error: function (e) {
//Error Function
},
success: function (jsonData) {
//Success Function
},
fail: function (data) {
//Fail Function
}
});
And this is the top of the Controller's GetDocuments function:
[Route("GetDocuments")]
public async Task<IActionResult> GetDocuments(string search)
{
No error messages anywhere. The Console shows an Object that contains 'search: "Test"' but when I hit the breakpoint in GetDocuments 'search' is null.
I think is more elegant way to use GET in this case then you should change your code to
var ajaxData = $("#textSearchBox").val();
url: "#Url.Action("GetDocuments", "DocumentSearchApi")"?search=ajaxData
and remove data: ajaxData
Because you want to get something from the search. Using the post is when you want to modify the data from API
you need use JSON.stringify() when sending data to a web server, the data has to be a string not a object
$.ajax({
type: 'POST',
url: "#Url.Action("GetDocuments", "DocumentSearchApi")",
data: JSON.stringify(ajaxData),
dataType: "json",
contentType: "application/json; charset=utf-8",
error: function (e) {
//Error Function
},
success: function (jsonData) {
//Success Function
},
fail: function (data) {
//Fail Function
}
});
I am trying to retrieve certain values in a JSON object retrieved from AJAX.
Using console.log(), I was able to view these:
0: Object
title: "First post"
body: "This is a post"
id: 1
userId: 27
.
.
.
100: //same format of data as object 0
Now I want to try storing the whole JSON object above so that I can use the userId and match it with another list of data to find the user who made the post. Problem is, I can't store it to a global variable. Here is my jscript snippet:
var postJson; //global variable
---somewhere in a function---
$.ajax({
url: root + '/posts',
type: "GET",
dataType: "JSON",
success: function(response){
postJson = response;
console.log(response);
}
});
I also tried doing postJson = $.ajax but nothing happened and postJson continues to be undefined.
$.ajax is async function, you need to use callback or do all the code in success function
var postJson; //global variable
function doSomething(r){
//r is here
}
---somewhere in a function---
$.ajax({
url: root + '/posts',
type: "GET",
dataType: "JSON",
success: function(response){
postJson = response;
//do something with postJson or call function doSomething(response)
}
});
function doSomething(r){
//r is here
}
---somewhere in a function---
$.ajax({
url: root + '/posts',
type: "GET",
dataType: "JSON",
success: function(response){
doSomething(response);
//do something with postJson or call function doSomething(response)
}
});
You can do directly via calling function from response no need to declare variable. Hope it will also helps you
I can't find what the error is in an AJAX call.
I have a PHP file output:
[{"value":"123","name":"My Name"}]
and this output is correct. And my AJAX call returns undefined after success:
$.ajax({
type: "POST",
url: "correct_file_location.php",
data: $(this.form).serialize(),
dataType: "json",
success: function (pk) {
alert(pk.value);
$("#label_id_name").text(pk.value);
},
error: function (){
alert("error");
}
});
Since the result is an array of objects, you need to first get the object from the array, and then access the properties of that object.
pk[0].value
should work.
*It is showing undefined because you are getting an array of objects and not only object *
try what #freedomn-m suggested in the comments
Try below code it will be work.
$.ajax({
type: "POST",
url: "correct_file_location.php",
//data: $(this.form).serialize(),
dataType: "json",
success: function (pk) {
var data1 = JSON.parse(pk[0].value);
console.log(data1);
// $("#label_id_name").text(pk.value);
},
error: function (){
alert("error");
}
}) ;
Your code will also work but your php response code must be in javascript object.
Please add below code in 'correct_file_location.php' and check with your ajax code.
'{"value":"123","name":"My Name"}';
I have an ajax POST that sends data to a controller function and that function returns a string array back to the ajax call as the default 1st parameter in the ajax success method. When I tried to use the returned data, it won't let me print the 1st element to an alert box. How come?
i.e.
$.ajax(
{
type: "POST",
url: "../Home/stringSplitFunct",
data: { 'parameter1': Input },
success: function (response)
{
alert(response[0]);
}
});
In fact, I don't think it even recognize it as a string array.
You need to specify dataType. Read more here.
$.ajax({
type: "POST",
url: "../Home/stringSplitFunct",
data: { 'parameter1': Input },
dataType: 'json',
success: function (response)
{
alert(response[0]);
}
});
Looks like the data is being returned as a raw sting.
Use dataType property for your ajax request
dataType: 'json'
Also avoid using alert as it stops the execution flow. Use console.log instead
I'm using jQuery to grab some JSON data. I've stored it in a variable called "ajaxResponse". I cant pull data points out of it; I'm getting ajaxResponse.blah is not defined. typeof is a string. Thought it should be an object.
var getData = function (url) {
var ajaxResponse = "";
$.ajax({
url: url,
type: "post",
async: false,
success: function (data) {
ajaxResponse = data;
}
});
return ajaxResponse;
},
...
typeof ajaxResponse; // string
ajaxResponse.blah[0].name // ajaxResponse.blah is not defined
make sure you specify option dataType = json
$.ajax({
url: url,
type: "post",
dataType: "json",
async: false,
success: function (data) {
ajaxResponse = data;
}
});
Q8-coder has the right of it, but to give you some details: your server is really passing back a string that you've formatted into JSON. You'll need to tell jQuery what to expect, otherwise it just assumes it received a string.
Add the following to your $.ajax options:
dataType: "json"
Also, refer to the jQuery API for examples and documentation for these options.