I have used the JavaScript code to call a method in the c# class (method provided in code). When is does a post back I get an error 500, I would like to know how I can fix this so that I call the method.
JavaScript to call c# class method
$.ajax({
type: "post",
url: "TestChapter.aspx/timeFinished",
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function (result) {
//
}
});
Method in C# class testchapter.aspx:
[System.Web.Services.WebMethod]
public void timeFinished() {
// my code is here
}
Try this method in C# class testchapter.aspx, it might work:
[System.Web.Services.WebMethod]
public static void timeFinished() {
// my code is here
}
Have a look at this post
One thing is that you certainly missed the / char in your ajax method url, it should be:
url: "/TestChapter.aspx/timeFinished",
The other thing is that you should log the error to the console, it's easier that way:
$.ajax({
type: "post",
url: "/TestChapter.aspx/timeFinished",
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function (result) {
// do something
},
error: function (data) { // handle your error loging in here
var errorDetails = data.responseText.replace("{", "").split(',');
var errorMessage = "";
for (var i = 0; i < errorDetails.length; i++) {
if (errorDetails[i].split(':')[0] == "\"Message\"") {
errorMessage = errorDetails[i].split(':')[1];
}
}
alert("Error:" + errorMessage);
});
It will write all errors in the debugger console, it's a lot easier to find errors.
Related
I know this question has been asked many times, I relly tried to follow many examples but every time, I fail for an unknown reason. So I'm going to show you my example a (very simple one) and I need someone to tell me what did I do wrong.
Starting with the controller (its name is Recherche) method:
public int getNote(string a,string b)
{
if(string.IsNullOrEmpty(a))
return 1;
else return 0;
}
As you can see I didn't use the variable b, but who cares it's just an example.
Now for the ajax method:
$.ajax({
type: "POST",
url: "/Recherche/getNote",
coententType: 'application/json',
dataType: 'json',
data:JSON.stringify({a:"a",b:"b"}),
success: successFunc,
});
function successFunc(data) {
document.getElementById('note').innerHTML = data;}
Try this
var a1='';
var b1='';
$.ajax({
type: "POST",
url: "/Recherche/getNote",
coententType: 'application/json',
dataType: 'json',
data:JSON.stringify({a:a1,b:b1}),
contentType: "application/json; charset=utf-8",
processData: false,
success: function (data) {
document.getElementById('note').innerHTML = data;
},
error: function (response) {
if (response != 1) {
alert("Error!!!!");
}
}
});
Controller
[HttpPost]
[WebMethod]
public ActionResult getNote(string a,string b)
{
if (a== null && b==null) return Json(0);
//Some Action send Result
return Json(data, JsonRequestBehavior.AllowGet);
}
I am trying to post to a method using jQuery and Ajax. My Ajax code is as follows:
var isMale = $(e.currentTarget).index() == 0 ? true : false;
$.ajax({
type: "POST",
url: "Default.aspx/SetUpSession",
data: { isMale: isMale },
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function() {
// Go to next question
}
});
And here is my WebMethod:
[WebMethod]
public static void SetUpSession(bool isMale)
{
// Do stuff
}
I get a 500 (Internal Server Error) looking at the console, the method never get's hit. After I changed data to "{}" and removed the bool from the method signature the method then gets hit, so I'm assuming its something to do with the Ajax.data attribute I'm trying to pass.
Two things you need to modify :-
1) Make sure that this line is written in your web service page and should be uncommented.
[System.Web.Script.Services.ScriptService]
2) Modify the "data" in the code as :-
$.ajax({
type: "POST",
url: "Default.aspx/SetUpSession",
data: '{ isMale:"' + isMale + '"}',
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function() {
// Go to next question
}
});
Pass string instead of bool
[WebMethod]
public static void SetUpSession(string isMale)
{
// Do stuff
}
Alternative you can use pagemethods through script manager.
Try following code:
var params = '{"isMale":"' + $(e.currentTarget).index() == 0 ? true : false + '"}';
$.ajax({
type: "POST",
url: "Default.aspx/SetUpSession",
data: params,
contentType: "application/json; charset=utf-8",
dataType: "json",
responseType: "json",
success: function (data) {}
});
[WebMethod]
public static void SetUpSession(string isMale)
{
// Do stuff
}
In my MVC3 app, I'm using $.ajax to call a method of type JsonResult to get data to be displayed:
function GetData(e) {
var ordersId = e.row.cells[0].innerHTML; //this is fine
$.ajax({
type: "POST",
url: "/Documents/GetDocumentData",
contentType: "application/json; charset=utf-8",
data: "{'id': '"+ordersId +"'}",
dataType: "json",
success: function (result) {
//load window
},
error: function (result) {
if (!result.success)
//show error
}
});
This is my Action:
[HttpPost]
public JsonResult GetDocumentData(string id)
{
//my code
return Json(new { success = true});
}
When im debugging on my development machine, it works fine. I deployed it to my test web server and i get '404 page not found dev/testwebsite/Documents/GetDocumentData' I should get this when debugging if something was wrong, but i dont. Why am I getting this error? Thanks
Your URL in the javascript is wrong, if that dev/testwebsite/Documents/GetDocumentData is the URL on the server.
You should be using #Url.Action() to automatically form those URLs in the cshtml page.
Example:
#Url.Action("actionName","controllerName" )
So, for your specific case, it would be:
#Url.Action( "GetDocumentData", "Documents" )
In the javascript, it would look like this:
function GetData(e) {
var ordersId = e.row.cells[0].innerHTML; //this is fine
$.ajax({
type: "POST",
url: '#Url.Action("GetDocumentData","Documents")',
contentType: "application/json; charset=utf-8",
data: "{'id': '"+ordersId +"'}",
dataType: "json",
success: function (result) {
//load window
},
error: function (result) {
if (!result.success)
//show error
}
});
I need to call a handler (ashx) file from jQuery to fetch some data at runtime.
My jQuery function looks like:
var pID = 3;
var tID = 6;
$("#Button1").click(function() {
var urlToHandler = "Controller/TestHandler.ashx";
$.ajax({
type: "POST",
url: urlToHandler,
data: "{'pID':'" + pID + "', 'tID':'" + tID + "'}",
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function(msg) {
alert(msg);
}
});
});
My handler code:
<%# WebHandler Language="C#" Class="TestHandler" %>
using System;
using System.Web;
public class TestHandler : IHttpHandler
{
public void ProcessRequest (HttpContext context)
{
String pID = context.Request.Params["pID"];
String tID = context.Request.Params["tID"];
context.Response.ContentType = "text/plain";
context.Response.Write(pID + " " + tID);
}
public bool IsReusable
{
get {
return false;
}
}
}
The problem is the code execution doesn't reach to the handler code.
I can call other web forms (aspx) files from the same jQuery function from the same directory, where the handler file is residing. So it isn't any path issue.
I am new to this handler file concept. I googled a lot but couldn't find anything wrong in my code.
It worked after changing the way I was passing the json data (as suggested by #DRAKO) and removing the contentType from the ajax post back call. Also corrected the path.
$("#Button1").click(function() {
var urlToHandler = "TestHandler.ashx";
$.ajax({
type: "POST",
url: urlToHandler,
data: { pID: pID, tID: tID },
dataType: "json",
success: function(msg) {
//do something with the msg here...
}
});
});
I think the way you are passing the json data to the handler is incorrect.
Also make sure the path to the handler is correct and write a line to the console in the handler to check if it is getting called. Try this code out
$("#Button1").click(function(){
$.ajax({
type: "POST",
url: "/Controller/TestHandler.ashx",
data: {pID:pID, tID:tID},
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function(msg) {
alert(msg);
},
error: function(){
alert("Error");
}
});
});
I am getting a problem in calling a webmethod inside my http handler. The jquery.js file opens up at some random place and gives a prompt "Invalid Argument"
Code is as follows:
JS:
var src = "MyHandler.axd";
var id = "1234566";
$.ajax({
type: "GET",
contentType: "application/json; charset=utf-8",
url: src + "/MyMethod?key=" + id,
success: function (msgObj) {
var msg = msgObj.d;
},
error: function (e) {
alert("Error");
}
});
C#
[System.Web.Services.WebMethod(EnableSession = true)]
[System.Web.Script.Services.ScriptMethod(UseHttpGet = true, ResponseFormat = ResponseFormat.Json)]
public static string MyMethod(string key)
{
return someLogic;
}
And because of which the ProcessRequest method is being called for the ajax call.
Even tried it with following
Removed httpget and responseformat from c# code.
JS
$.ajax({
type: "POST",
contentType: "application/json; charset=utf-8",
url: src + "/MyMethod",
data: "{ 'key':'"+ id +"'}",
dataType: "json",
success: function (msgObj) {
debugger;
var msg = msgObj.d;
},
error: function (e) {
debugger;
}
});
Well, not able to find any solution or reason why this behavior!
Kept the same webmethod in a page and its working fine. So added logic to handle the ajax call in process request only. works like a charm.