I have a view model which has a list of objects.
Binding the list to the WebGrid is fine and displays all data correctly.
The objects have a boolean value I'd like the user to change by selecting a checkbox displayed with each record in a WebGrid. When the user checks/unchecks various checkboxes then clicks an update button, I want to be able to save the changes on the objects.
The updating is proving a right "pain in the A..." with MVC and Razor.
How can I send these changes back to the controller?
Can someone please advise?
Any samples?
Update:
I have been able to pass the whole form back to the Controller after giving each checkbox a name and ID. The value is set to the item.Id and is only found in the form's attributes if the checkbox was actually checked.
So in the Controller, I do this:
public ActionResult Assign(FormCollection form)
{
var ch = form.GetValues("itemChk");
foreach (var id in ch)
{
//...Get object using id
//...Call your method
}
return View();
}
ch is a string array of the item.Ids of only those checkboxes that were checked.
By returning the item.Id as a value of a checked checkbox, I can assign/set that value on the item itself and save/update it.
Next to try get ALL checkboxes returned with values. Also to at text box to each row in the WebGrid and try something similar to handle the return values.
Here's the link that got me going down this track.
You can use Json ajax call to pass the FormCollection to the controller
$('#btnClick').click(function (event) {
var form = $("#fmSearch").serializeArray();
$.ajax({
url: '/Home/Assign',
dataType: "json",
type: "post",
data: form,
cache: false,
success: function (data) {
},
error: OnError
});
});
Please note: do not add "contentType: "application/json; charset=utf-8" because no any json content.
fmSearch is the id of Html.BeginForm(), you can write them as:
#using (Html.BeginForm(null, null, FormMethod.Post, new { id = "fmSearch" }))
{
#Html.ValidationSummary(true)
}
Last, add [HttpPost] above your action and replace ActionResult with JsonResult.
Related
I'm working on a application which should return multiple list based on selected values.
When a organisation is selected a few queries will run to populate a selectlist.
These queries only return data relevant for the selected organisation.
After that there is a dropdownlist to select which selectlist should be displayed. This will populate another dropdownlist with the data returned from the query.
On the initial load it is loaded correctly for the first organisation. However when another organisation is selected, an ajax post will call a method. this will run the queries succesfully and set the properties to the returned lists. however the problem is that the razor page still uses the data from the initial load.
this results in the fact that whatever organisation i will select, it will use the data from the queries for the first organisation on the razor page.
below the ajax call
$.ajax({
method: "POST",
url: "/Aanleveringen/Create?handler=Filter",
beforeSend: function (xhr) {
xhr.setRequestHeader("XSRF-TOKEN",
$('input:hidden[name="__RequestVerificationToken"]').val());
},
dataType: "json",
data: { organisatieId: $('#ddlOrganisatie option:selected').val() },
success: function (msg) {
alert(msg);
},
error: function (req, status, error) {
alert("Error try again");
}
});
and the method:
[HttpPost]
public IActionResult OnPostFilter(int organisatieId)
{
Filter filter = new Filter();
Organisatie organisatie = _context.Organisatie.Distinct().Where(x => x.Id == organisatieId).First();
FilterWaardeGemeente = filter.GetFilterGemeente(organisatie);
FilterWaardeDienst = filter.GetFilterDienst(organisatie);
FilterWaardeClient = filter.GetFilterClient(organisatie);
return new JsonResult("Gelukt");
}
looking for any suggestion to have the razor page model update with the most recent c# pagemodel.
thanks in advance.
Changing your model isn't going to do anything, as the Razor page is not being re-rendered. Since you're making the request via AJAX, you need to return your select list items from that action, and then use JavaScript to update the select list options manually in the DOM.
I'm working on an asp-mvc application and facing the following issue:
I have a model with simple properties plus one property which is a list of my custom object, and I render the Ienumerable property as mentioned here:
Passing IEnumerable property of model to controller post action- ASP MVC
In my view, I have a button that is supposed to add items to the ienumerable property of my model. Of Course, I don't want to lose already inserted data, so I need to pass the model to the corresponding action.
I've noticed that the model os transferred entirely only upon post. So, I did something like:
$(".addButton").click(function (event) {
event.preventDefault();
$("#FilterForm").submit();
#{ Session["fromAddFullItem"] = "true";}
return false;
});
And then in my controller, I do something like:
public ActionResult Index(FilterModel model)
{
if (Session["fromAddFullItem"].ToString() == "true")
{
Session["fromAddFullItem"] = "false";
return AddBlankItemTemplate(model);
}
I've read that assigning session in js is not recommended, but also tried TempData, and there the data was always null.
My problem is that Session["fromAddFullItem"] is always true, even when I come from another button. If I put breakpoint in addbtn click in line- Session["fromAddFullItem"] = "false";, and press the other button, I see that for some odd reason the mentioned breakpoint is hit, even though I haven't pressed the add button.
Any help? Maybe there is another way to achieve what I want. Currently, no matter which button I press (which posts the form), it comes as Session["fromAddFullItem"] = "false" and goes to action AddBlankItemTemplate. Thanks.
EDIT - AJAX POST
$(".addButton").click(function(event) {
event.preventDefault();
var modelData = JSON.stringify(window.Model);
$.ajax({
url: '#Url.Action("AddBlankItemTemplate")',
type: 'POST',
dataType: 'json',
data: modelData,
contentType: 'application/json; charset=utf-8',
});
return false;
});
and controller
public ActionResult AddBlankItemTemplate(string modelData)
EDIT 2:
$(".addButton").click(function (event) {
event.preventDefault();
$.ajax({
url: '#Url.Action("AddBlankItemTemplate")',
data: $("#FilterForm").serialize()
}).success(function(partialView) {
$('DetailsTemplates').append(partialView);
});
});
and Controller:
public ActionResult AddBlankItemTemplate(FilterModel model)
The line #{ Session["fromAddFullItem"] = "true";} is Razor code and will be run on page rendering and load regardless of where you put it in the page.
It's not client side code so won't wait for your js code to run. If you're trying to synchronise state between js and MVC have you looked into angularjs which could simplify these actions.
I have created an auto-populated drop downlist on my MVC 4 web application. When the user selects an item from the dropdown list, I want the partial view to show the item selected rather than all items as it already displays in this partial view.
How do I pass the string value parameter of the selected list item from an auto-populated dropdown list to a partial view controller?
Here is the code for my auto populated dropdown list:
#foreach (var m in ViewDatamodel)
{
if (m.State == "In Work")
{
<li>#m.TargetName</li>
}
}
I want to pass the m.TargetName string as a parameter so that i can manuipulate the partialview based on which list item is selected. The partialview consists of progress bars for jobs being performed where the data is stored on a SQL Server DB. I use the following Ajax Script to refresh the original partial view every 3 seconds. I need to be able to do the same with the selectedd partial views. Again, this is all autopopulated, so I am assuming the best way is to go by the TargetName:
<script>
function loadpartialView() {
$.ajax({
url: '#Url.Action("_GetfoeStatus', "Status")',
type: 'POST',
data: '{}', //I am assuming that I will need to pass the parameter to here
cache: 'false',
async: 'true',
success: function (result) {
$('#progress').html(result);
}
});
}
$(function() //..... Refresh Timer
Both the Action and RenderAction methods have overloads that allow you to pass additional parameters that are appended to the query string for the resource.
If you are doing this on the server side, you can:
Html.RenderAction("_GetForStatus", "Status", new { TargetName = m.TargetName })
If you are doing this on the client side, you would have to write some additional jQuery to make it work (or just plain old Javascript).
function loadpartialView() {
$.ajax({
url: '#Url.Action("_GetfoeStatus', "Status")',
type: 'POST',
data: { TargetName: $("#YourDropDown").val() }
cache: 'false',
async: 'true',
success: function (result) {
$('#progress').html(result);
}});
}
I used "TargetName" because I didn't know what your parameter name is.
I am facing a weird problem. I have a cshtml form:
<label class="pre_req_questions_width">
#Html.RadioButton("radioGroup" + Model.ID, "1", (Model.ExpectedResponse == 1 ? true : false), new { id = "rbtnYes", style = "margin-top:0px; margin-right:10px;" })Yes</label>
<label class="pre_req_questions_width">
#Html.RadioButton("radioGroup" + Model.ID, "2", !(Model.ExpectedResponse == 1 ? true : false), new { id = "rbtnNo", style = "margin-top:0px;margin-right:10px;" })No</label>
On form submit, I am getting radio group value like this:
int radioValue = int.Parse(fc.GetValue(controlID).AttemptedValue);
It works fine when i call it from #Html.BeginForm(), but when i try to send form collection via ajax like this:
input = $(':input')
$.ajax({
type: "POST",
url: '#Url.Action("SavePrerequisiteQuestion", "Dashboard", new { id = #Model.ID })',
data: input,
dataType: "html",
success: function (msg) {
alert("fine");
}, error: function (req, status, error) {
// with error
alert(error);
}
});
It send both values like this "1,2" rather than sending just selected/submitted value.
In your ajax request, you're sending all :input elements as your data:
...
data: input
...
What you probably want is to just serialize your form data, and send it with the request:
...
data: input.closest('form').serialize()
...
This is assuming you have your radio buttons in a <form> tag.
It may not be so easy to work around this. For instance, to get a selected radio button, you can do this: jQuery get value of selected radio button
So you can't just take all inputs and get the values from them... instead, you have to have more of a selective approach, and handle different elements appropriately. Checkboxes and selects will also have a similar problem.
You can put the #Html.Beginform back in and hijack the form submit in your jQuery
$('#formID').on('submit', function(e){
e.preventDefault(); // Just to stop the automatic Non Ajax submission of the form
$.post($(this).attr('action'), $(this).serialize(), function (data) {
//do stuff on success callback
alert("fine");
});
});
You can inherit the action path from the Html.BeginForm itself in the path below by doing
$(this).attr('action')
Note: If you want to manually put the path in there you still can instead of getting it
from the form
Then use $(this).serialize() to just serialize the whole form like the person above me
suggested
I have this Kendo UI dropdownlist with a select event that is handled by a JavaScript function.
I need to call an action result from a controller that runs a LINQ query to populate a Kendo UI grid on my page. My problem is the only way I can find to handle this even is with JavaScript and I have been unable to figure out how to call my action result from my controller from the JavaScript event function.
This is what the DropDownList looks like...
#(Html.Kendo().DropDownList()
.Name("Options")
.DataTextField("Text")
.DataValueField("Value")
.BindTo(new List<SelectListItem>() {
new SelectListItem() {
Text = "Policies Not Archived",
Value = "1"
},
new SelectListItem() {
Text = "View All Policies",
Value = "2"
},
new SelectListItem() {
Text = "Filter Policies",
Value = "3"
}
})
.Events(e =>
{
e.Select("select");
})
)
and my JavaScript event handler that needs to call the action result
function select(e) {
}
and depending on the selection an ActionResult like this,
public ActionResult ViewAllPolicies()
{
//mycode
}
see this post
var url = '#Url.Action("ViewAllPolicies","YourController")';
$.ajax({ url: url, success: DataRetrieved, type: 'POST', dataType: 'json' });
in controller
public ActionResult ViewAllPolicies()
{
//Should return json format
}
url – this is the URL where request is sent. In my case there is
controller called contacts and it has action calles
ListPartiesByNameStart(). This action method takes parameter
nameStart (first letter of person or company). success – this is the
JavaScript function that handles retrieved data. You can write there
also anonymous function but I suggest you to use functions with names
because otherwise your code may get messy when functions grow. type –
this is the type of request. It is either GET or POST. I suggest you
to use POST because GET requests in JSON format are forbidden by
ASP.NET MVC by default (I will show you later how to turn on GET
requests to JSON returning actions). dataType – this is the data
format that is expected to be returned by server. If you don’t assign
it to value then returned result is handled as string. If you set it
to json then jQuery constructs you JavaScript object tree that
corresponds to JSON retrieved from server.
Instead of returning json, you can also return a PartialView and in the .done function grab an element and replace it with the results from the partial view. PartialView actions basically return a fragment of HTML, and so you can just stuff that anywhere you want on the page:
$.ajax({
url: urlToPartialViewAction,
type: 'POST',
dataType: 'JSON',
data: '123'
})
.done(function (result) {
$('#someDivPlaceholder').replaceWith(result);
});
You could have something like a link or grey div and wire up to it's click event and then call this, the link might say "View Receipt" and when you click it you call an action that returns a partial view with the receipt, and so when they click it the div/link is replaced with the result. Kind of like the "View More Comments" links you see on social sites.
Note that you can't have a partial view by itself, it must be called through an action
public PartialViewResult _GetReceipt(string id)
{
ReceiptViewModel vm = //query for receipt data
return PartialView(vm);//render partial view and return html fragment
}
Once the select function executes, you need to make an AJAX call back to your Controller. You can use jQuery.ajax() (a wrapper for the most common AJAX operations) in the select function,
function select(e) {
var url = '#Url.Action("ViewAllPolicies", "PolicyController")';
var selectedPolicy = $('#Options').val(); // The option selected
$.ajax({
url: url,
type: 'POST',
dataType: 'JSON',
data: selectedPolicy
})
.done(function (data) {
// Display the data back from you Controller
});
}
You can look at the Kendo site for more info on how the DropDownList works.