In my kendo dataSource > transport > update. I want to catch a server response status (refer image), but none of this methods trigger an alert. Any idea why?
update: {
url: "./getRevenueAccounts.php",
type: "POST",
data: function() {
return {
method: "editRevenueAccounts"
}
},
success: function(e) {
if(e.status == 'duplicate'){
alert('Trigger 1');
}
},
error: function(e) {
if (e.errorThrown == 'duplicate') {
alert("Trigger 2");
}else if(e.status == 'duplicate' ){
alert("Trigger 3")
}
},
complete: function (e) {
if(e.status == 'duplicate'){
alert('Trigger 4');
}
}
},
console.log(e) screen shot
Try the following code for your success function:
success: function(e) {
if(e.responseText.status == 'duplicate'){
alert('Trigger 1');
}
},
Essentially, you are looking at the status property when you should have been looking at the responseText property to get the status (which is another property on that object).
You need to make an ajax call inside the update function.
Like:
var dataSource = new kendo.data.DataSource({
transport: {
read: function(options) {
/* implementation omitted for brevity */
},
update: function(options) {
// make JSONP request to https://demos.telerik.com/kendo-ui/service/products/update
$.ajax({
url: "https://demos.telerik.com/kendo-ui/service/products/update",
dataType: "jsonp", // "jsonp" is required for cross-domain requests; use "json" for same-domain requests
// send the updated data items as the "models" service parameter encoded in JSON
data: {
models: kendo.stringify(options.data.models)
},
success: function(result) {
// notify the data source that the request succeeded
options.success(result);
},
error: function(result) {
// notify the data source that the request failed
options.error(result);
}
});
}
},
batch: true,
schema: {
model: { id: "ProductID" }
}
});
For more details please check this from telerik documentation: https://docs.telerik.com/kendo-ui/api/javascript/data/datasource/configuration/transport.update
Is not a good method to apply, but it works to fetch the response.
if(e.responseText=='{"status":"duplicate"}'){
kendo.alert('duplicate data');
}
Related
Have a Kendo Read Call from JQuery as follows:
var dataSource = new kendo.data.DataSource({
error: function (e) {
if (e.status === "error") {
this.cancelChanges();
showToast("Error Occurred", e.xhr.responseText, "exclamation-circle", "red");
var grid = $('#grid').data('kendoGrid');
grid.dataSource._data = self.formatData(grid.dataSource.data());
grid.refresh();
}
},
requestEnd: onRequestEnd,
transport: {
read: {
type: "GET",
dataType: "json",
url: '/api/user/getall'
},
destroy: {
url: function (data) {
return "api/user/delete/" + data.RecordKey;
},
type: "delete",
dataType: "json"
},
parameterMap: function (data, operation) {
return kendo.stringify(data);
}
},
The server determines user unauthorized and returns the following Content
...
return new ContentResult()
{
StatusCode = 401,
Content = "No Access"
};
...
The errors blodk in the in the datasource does not fire? Not sure what I am missing.
Seems like the issue is with the parameterMap definition, specifically when the function is executed on a read operation
parameterMap: function (data, operation) {
if (operation != "read") {
return kendo.stringify(data);
}
}
With the above update and a mock 401 response the error event fires as expected - example.
Found my issue I had an error begin throw in my requestEnd block. Corrected that and error is firing.
Is it possible to access and modify data in Kendo UI grid before updating?
Below is an example to illustrate what I need. The options.data contains the sent data but it is already formatted in string "models=%B7%22Id22%.... etc" not really convenient form.
dataSource = new kendo.data.DataSource({
transport: {
read: {
...
},
update: {
url: baseURL + "update",
beforeSend: function(xhr, options){
xhr.setRequestHeader('API-KEY', apikey );
var modifiedData = doSomething(options.data);
return modifiedData;
},
dataType: "json",
method: "POST",
dataFilter: function(data){
... some data recieved modification
return JSON.stringify(somedata);
},
complete: function(e) {
....
}
},
You should be able to use the parameterMap function, check the type for "update" and change the options.data anyway you want.
parameterMap: function(options, type) {
if(type === "update") {
options.someProperty = "somenewvalue";
}
return kendo.data.transports.odata.parameterMap(options, type);
}
I load a complex treeview with kendo ui via ajax because I need to load the tree with one request (works fine):
$(document).ready(function() {
buildTree();
});
function buildTree(){
$.getJSON("admin_get_treedata.php", function (data) {
$("#treeview").kendoTreeView({
select: function(item) { editTreeElement(item,'tree'); },
dataSource: data
});
})
}
If I try to reload the complete tree after changing some data via ajax the new build tree does not work correct and does not update the text.
$.ajax({
type: 'POST',
url: 'ajax/ajax_update_layer.php',
data: {
layerid:id,
...
},
success: function(data){
buildTree();
}
});
What can Ido?
Thanks
Sven
try this on ajax success callback
var data = $("#treeView").data('kendoTreeView');
data.dataSource.read();
I got mine to work.
This is what I did:
Function that creates the tree view:
function CreateNotificationTree(userId)
{
var data = new kendo.data.HierarchicalDataSource({
transport: {
read: {
url: "../api/notifications/byuserid/" + userId,
contentType: "application/json"
}
},
schema: {
model: {
children: "notifications"
}
}
});
$("#treeview").kendoTreeView({
dataSource: data,
loadOnDemand: true,
dataUrlField: "LinksTo",
checkboxes: {
checkChildren: true
},
dataTextField: ["notificationType", "NotificationDesc"],
select: treeviewSelect
});
function treeviewSelect(e)
{
var $item = this.dataItem(e.node);
window.open($item.NotificationLink, "_self");
}
}
Modification & data source refresh:
$('#btnDelete').on('click', function()
{
var treeView = $("#treeview").data("kendoTreeView");
var userId = $('#user_id').val();
$('#treeview').find('input:checkbox:checked').each(function()
{
var li = $(this).closest(".k-item")[0];
var notificationId = treeView.dataSource.getByUid(li.getAttribute('data-uid')).ID;
if (notificationId == "undefined")
{
alert('No ID was found for one or more notifications selected. These notifications will not be deleted. Please contact IT about this issue.');
}
else
{
$.ajax(
{
url: '../api/notifications/deleteNotification?userId=' + userId + '¬ificationId=' + notificationId,
type: 'DELETE',
success: function()
{
CreateNotificationTree(userId);
alert('Delete successful.');
},
failure: function()
{
alert('Delete failed.');
}
});
treeView.remove($(this).closest('.k-item'));
}
});
});
Hope that helps.
I have a mobile application with MVC3 and Jquerymobile. At form submission (with ajax function) I want to display loading icon (ajax-loader.png) while submit and redirect.
Thanks!
my ajax function:
$("#add").click(function () {
$.validator.unobtrusive.parse($('form')); //added
if ($("form").valid()) {
var IDs = new Array($("#SelectedProduct").val(), $("#SelectedAccount").val(), $("#SelectedProject").val(), $("#SelectedTask").val(), $("#date").val(), $("#duration").val());
$.ajax({
url: '#Url.Action("SaveLine", "AddLine")',
type: 'post',
data: { ids: IDs },
dataType: 'json',
traditional: true,
success: function (data) {
if (data.success == true) {
$("#ajaxPostMessage").html(data.Success);
$("#ajaxPostMessage").addClass('ajaxMessage').slideDown(function () {
window.location.href = '#Url.Action("Index", "AddLine")';
}).delay(1800)
}
else {
$("#ajaxPostMessage").html(data.Error);
$("#ajaxPostMessage").addClass('ajaxMessage');
$("#ajaxPostMessage").show();
}
}
});
}
return false;
});
I would do something like this:
Ajax = {
Submit: function() {
Ajax.Loading();
//ajax stuff
//Ajax.Message('form complete, blah blah');
},
Loading: function() {
$('#ajax').html('ajax-loader.png');
},
Message: function(msg) [
$('#ajax').html(msg);
}
}
How can I pass custom error information from an ASP.NET MVC3 JsonResult method to the error (or success or complete, if need be) function of jQuery.ajax()? Ideally I'd like to be able to:
Still throw the error on the server (this is used for logging)
Retrieve custom information about the error on the client
Here is a basic version of my code:
Controller JsonResult method
public JsonResult DoStuff(string argString)
{
string errorInfo = "";
try
{
DoOtherStuff(argString);
}
catch(Exception e)
{
errorInfo = "Failed to call DoOtherStuff()";
//Edit HTTP Response here to include 'errorInfo' ?
throw e;
}
return Json(true);
}
JavaScript
$.ajax({
type: "POST",
url: "../MyController/DoStuff",
data: {argString: "arg string"},
dataType: "json",
traditional: true,
success: function(data, statusCode, xhr){
if (data === true)
//Success handling
else
//Error handling here? But error still needs to be thrown on server...
},
error: function(xhr, errorType, exception) {
//Here 'exception' is 'Internal Server Error'
//Haven't had luck editing the Response on the server to pass something here
}
});
Things I've tried (that didn't work out):
Returning error info from catch block
This works, but the exception can't be thrown
Editing HTTP response in catch block
Then inspected xhr in the jQuery error handler
xhr.getResponseHeader(), etc. contained the default ASP.NET error page, but none of my information
I think this may be possible, but I just did it wrong?
You could write a custom error filter:
public class JsonExceptionFilterAttribute : FilterAttribute, IExceptionFilter
{
public void OnException(ExceptionContext filterContext)
{
if (filterContext.RequestContext.HttpContext.Request.IsAjaxRequest())
{
filterContext.HttpContext.Response.StatusCode = 500;
filterContext.ExceptionHandled = true;
filterContext.Result = new JsonResult
{
Data = new
{
// obviously here you could include whatever information you want about the exception
// for example if you have some custom exceptions you could test
// the type of the actual exception and extract additional data
// For the sake of simplicity let's suppose that we want to
// send only the exception message to the client
errorMessage = filterContext.Exception.Message
},
JsonRequestBehavior = JsonRequestBehavior.AllowGet
};
}
}
}
and then register it either as a global filter or only apply to particular controllers/actions that you intend to invoke with AJAX.
And on the client:
$.ajax({
type: "POST",
url: "#Url.Action("DoStuff", "My")",
data: { argString: "arg string" },
dataType: "json",
traditional: true,
success: function(data) {
//Success handling
},
error: function(xhr) {
try {
// a try/catch is recommended as the error handler
// could occur in many events and there might not be
// a JSON response from the server
var json = $.parseJSON(xhr.responseText);
alert(json.errorMessage);
} catch(e) {
alert('something bad happened');
}
}
});
Obviously you could be quickly bored to write repetitive error handling code for each AJAX request so it would be better to write it once for all AJAX requests on your page:
$(document).ajaxError(function (evt, xhr) {
try {
var json = $.parseJSON(xhr.responseText);
alert(json.errorMessage);
} catch (e) {
alert('something bad happened');
}
});
and then:
$.ajax({
type: "POST",
url: "#Url.Action("DoStuff", "My")",
data: { argString: "arg string" },
dataType: "json",
traditional: true,
success: function(data) {
//Success handling
}
});
Another possibility is to adapt a global exception handler I presented so that inside the ErrorController you check if it was an AJAX request and simply return the exception details as JSON.
The advice above wouldn't work on IIS for remote clients. They will receive a standard error page like 500.htm instead of a response with a message.
You have to use customError mode in web.config, or add
<system.webServer>
<httpErrors existingResponse="PassThrough" />
</system.webServer>
or
"You can also go into IIS manager --> Error Pages then click on the
right on "Edit feature settings..." And set the option to "Detailed
errors" then it will be your application that process the error and
not IIS."
you can return JsonResult with error and track the status at javascript side to show error message :
JsonResult jsonOutput = null;
try
{
// do Stuff
}
catch
{
jsonOutput = Json(
new
{
reply = new
{
status = "Failed",
message = "Custom message "
}
});
}
return jsonOutput ;
My MVC project wasn't returning any error message (custom or otherwise).
I found that this worked well for me:
$.ajax({
url: '/SomePath/Create',
data: JSON.stringify(salesmain),
type: 'POST',
contentType: 'application/json;',
dataType: 'json',
success: function (result) {
alert("start JSON");
if (result.Success == "1") {
window.location.href = "/SomePath/index";
}
else {
alert(result.ex);
}
alert("end JSON");
},
error: function (xhr) {
alert(xhr.responseText);
}
//error: AjaxFailed
});
Showing the xhr.responseText resulted in a very detailed HTML formatted alert message.
If for some reason you can't send a server error. Here's an option that you can do.
server side
var items = Newtonsoft.Json.JsonConvert.DeserializeObject<SubCat>(data); // Returning a parse object or complete object
if (!String.IsNullOrEmpty(items.OldName))
{
DataTable update = Access.update_SubCategories_ByBrand_andCategory_andLikeSubCategories_BY_PRODUCTNAME(items.OldName, items.Name, items.Description);
if(update.Rows.Count > 0)
{
List<errors> errors_ = new List<errors>();
errors_.Add(new errors(update.Rows[0]["ErrorMessage"].ToString(), "Duplicate Field", true));
return Newtonsoft.Json.JsonConvert.SerializeObject(errors_[0]); // returning a stringify object which equals a string | noncomplete object
}
}
return items;
client side
$.ajax({
method: 'POST',
url: `legacy.aspx/${place}`,
contentType: 'application/json',
data: JSON.stringify({data_}),
headers: {
'Accept': 'application/json, text/plain, *',
'Content-type': 'application/json',
'dataType': 'json'
},
success: function (data) {
if (typeof data.d === 'object') { //If data returns an object then its a success
const Toast = Swal.mixin({
toast: true,
position: 'top-end',
showConfirmButton: false,
timer: 3000
})
Toast.fire({
type: 'success',
title: 'Information Saved Successfully'
})
editChange(place, data.d, data_);
} else { // If data returns a stringify object or string then it failed and run error
var myData = JSON.parse(data.d);
Swal.fire({
type: 'error',
title: 'Oops...',
text: 'Something went wrong!',
footer: `<a href='javascript:showError("${myData.errorMessage}", "${myData.type}", ${data_})'>Why do I have this issue?</a>`
})
}
},
error: function (error) { console.log("FAIL....================="); }
});