I have an asp.net web application.
On clicking a button, on the server side some code is executed. If the code is successfully executed I want an alert popup box to be shown to the user informing them of the successful completion of the action.
Any ideas?
Kind Regards,
Fiona
Google "alert asp.net" will give you plenty of solutions using the javascript alert function.
Even better, googling "jquery alert asp.net" will give you jquery solutions (an html modal popup which is modal to the current page, but allows you to switch to other tabs in a tabbed browser).
server side code and clide side code run in different contexts,
I think your best approach would be to post with ajax or jquery like:
$.post(url,parameters, function(){
//this code runs after the post
alert('my message')
}
);
I suggest you a couple of solutions.
Create a Javascript onclick event handler that executes an AJAX call to your business code. The success callback of the call will display the alert. References here. I prefer this solution.
$.ajax({
type: 'POST',
url: 'path/to/my/business/handler.ashx',
data: ({/*my json data*/}),
error: function (request, status, error) {
alert("Something wrong here!");
return false;
},
success: function (returnData) {
alert("Everything fine here!");
}
});
Manage the onclick event with a server side event handler. When the business logic has been executed, you can register a javascript script that execute the alert. References here.
ClientScriptManager cs = Page.ClientScript;
Type csType = this.GetType();
cs.RegisterClientScriptBlock(csType, "handler", #"<script language='javascript' type='text/javascript'>alert('Eveything fine here!');</script>");
Related
I am new to AJAX here. How can i replace the initial php function after the action of ajax is execute? I have found that the page will not refresh after the action is execute.
Here is the code:
javascript
function set_ddm(another_data) {
var result = $.ajax({
url: '../display/ea_form_header.php',
type: 'POST',
data: {
action: 'set_ddm',
Data_store: another_data,
},
success: function(data) {
console.log(data);
}
}).responseText;
}
php code
<td>
<?php
//initial function (customized drop down)
print ddm_jsfunc_employee("employee_list",$employee_list)
set_ddm(data);
if($_POST['action'] =='set_ddm') {
$employee_list=$_POST['Data_store'];
$employee_list_decoded = json_decode($employee_list,true);
//expected this function to replace the initial function after ajax was called
print ddm_jsfunc_employee("employee_list",$employee_list_decoded);
} ?>
</td>
I expect the function will replace the initial function and show in the main page but it only show in console after ajax(page aren't refresh to show it). Is there any wrong with the code or any solution for this? (the ddm_jsfunc_employee must be there to print the drop down)
thanks in advance
From ajax success callback you have to set that response in the html to view on web page.
like this:
$('.elementClass').html(response);
i hope this will works for you.
I think you have a slight misunderstanding about what AJAX is, it is not something to replace your PHP code with, but to asynchronously get data and update your webpage without reloading.
Let's first take a look at the .ajax function specifically interesting for us now is the .done() callback method, because JavaScript does the request realtime (async) JavaScript does not know when the request is done. But it allows us to specify a function inside the .done for it to call when it is done.
A really simple example would be:
$.ajax('https://stackoverflow.com')
.done(function(data) {
// We can do what we want with the data here.
console.log(data);
});
Now when the request is done the function we defined in .done will be called, in this case a simple log. But you would want to change this to a function that updates your HTML.
I also see you are calling JavaScript functions in your PHP, this will not work as PHP runs on your server but JavaScript runs in your browser. (Unless you use node or the likes)
Just a tip; it is advised to place JavaScript at the bottom of your HTML page as JavaScript is blocking content. (proper link explaining needed here)
Meaning your browser will stop parsing the HTML and run the JavaScript as it finds it.
Long story short, if you want to replace the PHP code, you would have to remove it. Make a PHP script which gives you your data. AJAX call it and then use .done or success and update your webpage from there.
I am making a post request to google app script with the code below
var url ="MY WEBAPP EXEC"
function submitForm() {
var postRequest = {}
postRequest.name = $("#inputName").val();
postRequest.email = $("#inputEmail1").val();
postRequest.message = $("#inputMessage").val();
alert(JSON.stringify(postRequest)); // this alert
$.post(url, postRequest, function(data,status){
alert('success')
});
}
I am very confused why the post is working with the alert but doesn't work without it. Thank you.
===
OK I guess my question was not clear enough sorry.
I have a form accessing GAS remotely. I assumed the url implied that I was accessing GAS remotely. At the moment I am working on my localhost and on my JS above it works if the alert statement is present and does not do anything if alert is not there.
I was watching the execution list on GSuite Developer Hub to see if the request failed or completed. I observed if the alert statement is in the script the execution status is completed but if the alert statement is not there nothing happens. I assume that my post script is not working if alert is not there. Any idea why?
You haven't shown exactly how that function is called, but it's likely to be because, if this is truly a "form submit" action, the result of submitting a form is to "load a new page" (which can be the same page you're on, and is so by default with no action attribute in the form tag
Since you want to perform AJAX on form submit, you need to "prevent" the "default" form submit action - this can be achieved as shown in the second and third lines below
var url ="MY WEBAPP EXEC"
function submitForm(e) { // if this function is called using an event handler, it gets an event as the first and only argument
e.preventDefault(); // prevent the "default" form submit action
var postRequest = {}
postRequest.name = $("#inputName").val();
postRequest.email = $("#inputEmail1").val();
postRequest.message = $("#inputMessage").val();
alert(JSON.stringify(postRequest)); // this alert
$.post(url, postRequest, function(data,status){
alert('success')
});
}
Preface
For this question, I have a MVC partial view. The view has a section which displays a list of documents. Each document has a hyperlink: when clicked, the hyperlink takes the user to a second page view displaying additional information.
The link is inside an unordered list:
<a style="text-decoration:underline;" onclick="sendToDocketSearch('#currentDocument.DktYear','#currentDocument.DktSequence','#currentDocument.DktSubActionID');">#currentDocument.DktYear.ToString().PadLeft(2, '0') - #currentDocument.DktSequence.ToString().PadLeft(5, '0')</a>
When the user clicks the link, it takes them to a sendToDocketSearch javascript function (to prepare to search for the document):
var sendToDocketSearch = function (yearOfDocket, sequenceOfDocket, dktSubActionIDOfDocket) {
jQuery.ajax({
type: "POST",
url: "#Url.Action("DocketSearchOnDemand")",
dataType: "json",
contentType: "application/json; charset=utf-8",
data: JSON.stringify({ docketYear: yearOfDocket,
docketSequence: sequenceOfDocket,
DktSubActionID: dktSubActionIDOfDocket,
userIsAuthorized: '#Model.userIsAuthorized' }),
success: function (data) {
alert(data);
},
failure: function (errMsg) {
alert(errMsg);
}
});
submitForm();
}
Note that the page/view/form is submitted after the following controller method is run:
public ActionResult DocketSearchOnDemand(string docketYear, string docketSequence, decimal DktSubActionID, bool userIsAuthorized, PortalIndexView viewmodel)
{
System.Web.HttpContext.Current.Session.Add("userIsAuthorized", userIsAuthorized);
string docketSearch = docketYear + "-" + docketSequence;
System.Web.HttpContext.Current.Session["DocketSearchOnDemand"] = docketSearch;
if (DktSubActionID > 0)
{
System.Web.HttpContext.Current.Session["DktSubActionID"] = DktSubActionID.ToString();
System.Web.HttpContext.Current.Session["searchingCustomID"] = true;
}
else
{
System.Web.HttpContext.Current.Session["DktSubActionID"] = "1";
System.Web.HttpContext.Current.Session["searchingCustomID"] = false;
}
return View(viewmodel);
}
The above controller method runs; then, because the form is submitted, the HttpPost action for the page takes place. When running it on my local PC, the link is clicked and the next page is loaded without drama.
Problem
The problems start when I upload the code to the dev/test server. I don't know how to use breakpoints while troubleshooting an active website, so I follow along with the browser developer tool to monitor network traffic.
When clicking the link when running the website on my localserver, the process continues:
the hyperlink takes me to a method where I pass information to be searched
the page/view/form is submitted
the controller redirects where I have to go.
When I click the link on the site and it's on the server, the first click is completely ignored - network traffic shows that it tries to navigate to the controller via the javascript function above, but the failure happens so fast I can't even take a screenshot of it. The page reloads a second time at this point.
When I click on the same link a second time, it works without fail.
I believe the view/javascript/controller code works because it works the second time (and on subsequent attempts). It just flagrantly fails the first time on the server; after that, the user is fine. I'd like to prevent that "first-time" failure, however, and I'm wondering what the problem could be...
Bad timing
I may be passing the information too early (or too late for my website/server to process it properly). The page does it correctly the second time, so maybe I'm just "jumping the gun" by not waiting a little longer for page-loading processes to sort themselves out. (Maybe I can fiddle around with the $(document).ready() javascript portion of the first page to "delay" allowing people to click a link.)
Code error
I'll be glad to admit bad code if I'm genuinely messing something up. Maybe it's my javascript function, or maybe it's the code in my controller; at any rate, something is making the first pass of that function call be rejected. Maybe my code is bad because the problem doesn't happen the second time, and I'm getting a false sense of security (i.e. there are problems with my code that the system is willing to forgive after the page has thoroughly loaded).
Server problem/miscellaneous
I'm wondering if I missed something when I uploaded my latest changes, or if I should have contacted my network team in case there are permissions that need to be activated for the site to work smoothly. I'm already in touch with them regarding something else, so I might take advantage of the opportunity today.
There is an alternative in place that could help me prevent this problem from happening, but I want to find out why the "first-time" failure happens. Other similar actions fail the first time on the site, and I'd like to apply the insights from fixing this issue to them.
Thank you for looking at this issue. Have a great day.
Are you sure you want to call submitForm(); before your jQuery.ajax has finished? your ajax call is async so it will hit submitForm(); before it has had time to finish. should submitForm(); be in your success event instead?
I am having trouble getting a basic ajax POST to work. I switched to an onclick after I was having trouble getting using a jquery .click, among other things. Just wondering if I am making some blatant mistake or what. If no obvious mistake, it may be something with apache? Not too much experienced here so any help would be appreciated.
Here is a link to a function:
click this for php page
Here is the function:
function postData() {
console.log("outside ajax is working");
$.ajax({
type: "POST",
url: "/markerpages.php",
data: {
source1: "some text",
source2: "some text 2"},
success: function (data) {
console.log("inside ajax is working");
},
error: function () {
console.log("ajax post failed")
}
});
here is what I have on my php webpage:
<?php
if (isset($_POST['source1']))
$src1 = $_POST['source1'];
else $src1 = "post data not obtained";
echo $src1;
echo "<pre>" . print_r($_REQUEST, 1) . "</pre>";
print_r($_POST);
var_dump($_POST);
var_dump($_POST);die;
?>
I am not returning errors in firebug, and I am getting the log statements I placed inside ajax and outside, just not getting empty arrays on the PHP page.
Sincere thanks for any help.
You are sending the user to the page using the anchor tag. If you do this, all post data is lost. You need to replace the url in the anchor tag with # to make sure the user stays on the page:
click this for php page
First of all you should put a return false; in the js function, doing so there will not be any redirects,
Check in Developer Network your request, if the url is correct and if you are retrieving any errors during the ajax post.
When clicking the link, postData() is being called, but then the browser is loading the URL specified in your <a href>. You can do one of three possible things:
Add the following line at the top of your postData() function: event.preventDefault(). That will stop the original event clicking action, and is the preferred method.
Change your onclick attribute and add return false to prevent the URL clicking behavior. Ex: onclick="postData(); return false;
Change the <a href="/markerpages.php"> to <a href="#">. But this is not a good approach since the page's URL will change to mypage.htm#.
Another helpful debugging tip: you can output the data variable (the returned value from your PHP script) like so: console.log(data);.
And since you seem to be hand building a form which will eventually pass values from the server back to the front-end, I suggest looking at this article: Pass a PHP Array to Javascript as JSON using AJAX and json_encode()
Scenario:
I have written an MVC wizard that automatically uses ajax if javascript is enabled in the browser. Each step of the wizard is a PartialView (I'm using ASP.NET MVC 3).
All works fine.
The problem is refreshing the page if, for example, the user's status changes as a result of how she fills in the wizard. EG, if the wizard logs the user in, or registers them. As the wizard 'moves' from step to step by getting Partial Views via AJAX, the page doesn't get refreshed to reflect the change in the user's status (eg, an anonymous user is now registered).
What I want to do:
Essentially, when I need a full page refresh, I need to AUTOMATICALLY run the following on the client AFTER delivering the Partial View corresponding to the current step of the wizard via AJAX:
location.reload();
The Problem:
As the DOM has been modified via AJAX, I don't know how to make my javascript (location.reload();) run WITHOUT user intervention (eg, clicking a button).
Any suggestions? I have been off work for a while and am struggling to get back up to speed.
For now, I have solved my problem using the code in the following article:
Redirecting after AJAX call, when using ASP.NET MVC
I like the approach discussed in the article because it results in reusable code, in a very MVC way - I already have a base controller (AjaxController.cs) where I encapsulate all my AJAX aware code and this is a nice addition to it.
However, there are two issues with this approach:
I have to redirect away from my wizard, so it only works for the final step of the wizard. If the user's status changes half way through the wizard, I am still jiggered.
I would still like to know how to refresh my page after an AJAX call, rather than just redirecting like this.
So if anyone has the answer, I will gladly give them the biscuit.
I am not quite sure how your ajax calls are structured, but if you are using the MVC Ajax helper you can just call location.reload(); in the OnComplete method, like so:
#using (Ajax.BeginForm(new AjaxOptions{OnComplete = "javascriptfunction"}))
{
//Data and submit button
}
<script>
function javascriptfunction(){
location.reload();
}
</script>
// C# code
public ActionResult Foo(Bar bar)
{
// code here
return Json(new
{
Success = true,
Value = this.RenderPartialViewToString("PartialViewName", bar),
Callback = "window.location.href = 'http://yourdomainurl.com/';"
});
}
// jQuery Ajax
$.ajax({
type: "POST",
url: "/urlWhereToPost",
data: ("form#id").serialize(),
dataType: 'json',
async: false,
beforeSend: function() {
// some instruction
},
error: function(e) {
alert(e.responseText);
},
success: function(data) {
if (data.Success) {
if (data.Callback != null) {
if (data.Callback.length > 0) {
jQuery.globalEval(data.Callback);
}
}
}
else {
// do something
}
}
});