I am simply learing Ajax with jQuery and have a simple page method that takes in a parameter and returns a string. For some reason, I am not getting the return string but I am getting to my 'success' message:
$(document).ready(function() {
$.ajax({
type: "POST",
url: "testFormMatt.aspx/sayHello",
contentType: "application/json; charset=utf-8",
data: '{"name": "matt"}',
dataType: "json",
success: function(msg) {
$.jGrowl('The web service has been successfully called');
$('#result').append(msg);
}
});
});
When you call append, you need to specify the property of the JSON object that you want to append.
So if your page is returning:
{ message: "Hello, Matt" }
Then you'd need to call append like this:
$("#result").append(msg.message);
If your page is not returning JSON, then you need to take the dataType: "json" out of the $.ajax call. The dataType parameter is for specifying the expected data type of the response, not the data type of the request.
Related
I am using vb.net 2.0 and asp.net in my project.
I am sending ajax request from a page to get response.
$.ajax({
type: "POST",
url: "GetMyData.aspx?i=2",
data: '{ugData: \"10\"}',
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function (response) {
alert(response.d);
return false;
},
failure: function (response) {
alert("Failed");
}
});
In this code, after ajax request I can see that the variable "ugData" is in the Request Payload in Developers tool.
Can any one help me out How can i able to read this "ugData" variable value in my Page "GetMyData.aspx".
Thank You..
I know that it is possible to send an AJAX request to an .asmx page. And I also know that an .asmx page handles an AJAX request via a web method.
Is it also possible to send an AJAX request to an .aspx page? If so, does an .aspx page also handle an AJAX request via a web method? Note that I would like to return a JSON response from the .aspx page. Is this possible?
You can define web methods in the code-behind of your .aspx page and then call them:
[WebMethod]
public static string doSomething(int id)
{
...
return "hello";
}
And then, to call a web method in your jQuery code:
$.ajax({
type: "POST",
url: "YourPage.aspx/doSomething",
data: "{'id':'1'}",
dataType: "json",
contentType: "application/json; charset=utf-8",
success: function (data) {
var returnedstring = data.d;
var jsondata = $.parseJSON(data.d);//if you want your data in json
}
});
Here is a good link to get started.
if i understood question correctly, Aspx is same as HTML. It will be rendered as HTML. but only difference is Server Side and Controls retaining the states with state mechanism.
so you can do jquery $.ajax() function.
$.ajax({
url: UrlToGetData,
dataType:'json',
success:function(data){
//do some thing with data.
}
});
or if you want to write out json value to the response, then use Response.ContentType
first use any Javascript serializer(JSON.NET) , then set the contentType like this.
Response.ContentType="application/json";
$.ajax({
url: "(aspx page name/method to be called from the aspx.cs page)",
type: "POST",
dataType: "json",
data: $.toJSON(jsonData),
contentType: "application/json; charset=utf-8",
success: function (data, textStatus, jqXHR) {
//TO DO after success
}
});
Try the above code
I would like consume cross-domain web-service from client with jquery.here is my code
function getId() {
var testid = ($('#<%=PreviousTest.ClientID %> OPTION:selected').val());
jQuery.support.cors = true;
jQuery.ajax({
type: "POST",
url: "../FalconWebService.asmx/minlatency",
data: "{'testId':" + testid + "}",
contentType: "application/json; charset=utf-8",
dataType:"json",
success: function (data) {
alert("catch");
var msg = jQuery.parseJSON(data.Table);
return msg;
},
Error: function () {
alert("error");
}
my webservice returns values in this format
{"Table":[{"minlatency":16.0,"Time":"/Date(1328248782660+0530)/"},{"minlatency":7.0,"Time":"/Date(1328248784677+0530)/"},{"minlatency":13.0,"Time":"/Date(1328248786690+0530)/"},{"minlatency":6.0,"Time":"/Date(1328248788690+0530)/"},{"minlatency":20.0,"Time":"/Date(1328248790707+0530)/"},{"minlatency":12.0,"Time":"/Date(1328248792723+0530)/"},{"minlatency":26.0,"Time":"/Date(1328248794723+0530)/"},{"minlatency":18.0,"Time":"/Date(1328248796723+0530)/"}]}
Calls in cross-domain work in a different way. They create dynamic javascripts that are inserted to the page using a callback function. This function is used to handle the response from the service. The Jquery calls add a "?callback=?" to the URL of the service, where "callback" is the name of the function that will be inserted.
To call cross-domain services with JQuery you have to do the following:
jQuery.ajax({
type: "POST",
url: "../FalconWebService.asmx/minlatency",
data: "{'testId':" + testid + "}",
contentType: "application/json; charset=utf-8",
dataType: "jsonp", //The data type that you must use is JSONP. Basically tells JQuery that the request is cross-domain
success: function (data) {
alert("catch");
var msg = jQuery.parseJSON(data.Table);
return msg;
},
Error: function () {
alert("error");
},
jsonpCallback: 'callback' //Dude to the fact that the JS is being generated dynamicaly, this tells JQuery to use the name "callback" for the function that will handle the result, as it adds "?callback=?" to the URL
});
You could also use "jsonp" instead of "jsonpCallback" if you want to "override the callback function name in a jsonp request" (from JQuery).
It worked for me (in WCF REST services which communicate with JSON messages, but it should work the same way in your case). This is all explained in the JQuery Ajax documentation.
Hope this helps.
Looks like it just doesnt want to work...
# Webservice:
<ScriptMethod(UseHttpGet:=False, ResponseFormat:=ResponseFormat.Json), WebMethod()> _
Public Function LoginDB(ByVal user As String, ByVal pass As String) As String
global.user = user
global.pass = pass
If (<<lots of code to check if user is valid>>) Then
Return "1"
Else
Return "0"
End If
End Function
The webservice DOES work, if the user is valid, returns 1 otherwise 0. But I always get it as XML
<?xml version="1.0" encoding="utf-8"?>
<string xmlns="http://tempuri.org/">"0"</string>
#Jquery:
$.ajax({
type: "POST",
contentType: "application/json; charset=utf-8",
url: "Services/Autenticacao.asmx/LoginDB",
data: "{'user':'ale','pass':'123'}",
dataType: "json",
success: function(data) {
alert(data);
},
.....
Anyone?
You need to post your jQuery, but are you using the getJson jQuery method? If not you need to explicitly set the correct data type:
$.ajax({
type: "POST",
contentType: "application/json; charset=utf-8",
url: "WebService.asmx/WebMethodName",
data: "{}",
dataType: "json"
});
Or use the getJSON method:
$.getJSON('WebService.asmx/WebMethodName', function(data) {
//Do something with JSON response (data)
});
If you want your webservice to return JSON
asked and answered... How to return JSON from a 2.0 asmx web service
is it possible to call a webservice that accepts 5 string parameters without sending via json? (is this recommended) I have created a webservice with a method that accepts 5 string params.. and i have my jquery
$.ajax({
type: "POST",
url: "Service.aspx/CreateClient",
data: "{}",
contentType: "application/json; charset=utf-8", //// ERMMM ???
dataType: "json", // ERMMM?
success: function(msg) {
alert(msg.d);
},
error: function() {
alert('error');
}
});
The old way without using jquery was to do this
this.para.add("Name", name);
this.para.add("ClientNum", clnum);
this.para.add("Email", email);
this.para.add("Register", register);
this.para.add("Message", message);
SOAPClient.invoke(this.url, "MyService.aspx/CreateClient", this.para, true, this.completeDone, this);
At the other end it lands and fills in all parameters....
What is the recommended way?
why not use querystring variables and avoid the overhead of the SOAP protocol?