C# asp.net MVC project: I have my index page with a button in it, I want to press it and update the same page with some results.
Here's some code:
The View: (with a button that calls the getConfig method in the controller)
#{
ViewBag.Title = "Home Page";
}
<form method="get" action="/Home/GetConfig/" >
<input type="submit" value="Get Config WS" />
</form>
<p>
#ViewBag.totalRecords
</p>
The controller:
public class HomeController : Controller
{
public ActionResult Index()
{
ViewBag.Message = "Test webservices";
return View();
}
public void getConfig()
{
string totalRecords = string.Empty;
wsConfig.config_pttClient client = new wsConfig.config_pttClient();
wsConfig.getConfigInput gci = new wsConfig.getConfigInput();
wsConfig.getConfigOutput gco = new wsConfig.getConfigOutput();
gco = client.getConfig(gci);
totalRecords = gco.result.totalRecords.ToString();
ViewBag.totalRecords = totalRecords;
}
I want to press the view's button and show the totalRecords on the same page.
How can I achieve this?
Edit: There might be other solutions, (if you don't mind updating your entire page) but this how I generally do it.
Ok, there are a couple of things that you need to change in order to make it work:
Create a new partial view that contains just the part that you would like to update (and wrap it an element with an id). In this example, let's call it 'Partial_TotalCount'.
This partial view will contain the following code:
<div id="updated">
<p>
#ViewBag.totalRecords
</p>
</div>
Now, change your original view so that it includes the partial view:
#{
ViewBag.Title = "Home Page";
}
<form method="get" action="/Home/GetConfig/" >
<input type="submit" value="Get Config WS" />
</form>
#Html.Partial("Partial_TotalCount", #Model)
Now, update your controller to work with an ajax request. This would make your controller looks like:
public ActionResult Index()
{
ViewBag.Message = "Test webservices";
if (Request.IsAjaxRequest())
{
getconfig();
return PartialView("Partial_TotalCount");
}
return View();
}
Now, you need to be able to submit the page when you click the button. This can be done through javascript:
First your javascript function that will update the contents:
<script type="text/javascript">
function Refresh() {
$.ajax({
url: '/Home/Index',
type: "GET",
dataType: "html",
success: function(data) {
$("#updated").html(data);
},
error: function() { alert('Refreshing error.'); }
});
}
</script>
You just need to add an onclick on your button. And you can remove the form tags from around your form aswell.
Edit: As requested by the questioner, I provide a bit of explanation on the Javascript function itself:
$.ajax means that we are doing an Ajax request. It means that we are doing some asynchronous requests with the server.
Then a couple of parameters are passed:
Url: The url that should be executed. In your example, the code behind the url "Home/GetConfig" get's executed.
Type: The type of submit that you want to do (POST, GET, ...)
dataType: The type we are expecting back from the server.
Success: The piece of javascript that needs to execute when complete. (In this case, update the DIV element with the id "WithCss" with the contents that are received with the url "Home/Getconfig".
Error: A function that is executed when the request failed for some reason.
There are a lot of other parameters you can pass (for example if you need to pass an id, and others.
For more explanation, please look at the original documentation.
Also, consider marking this answer as accepted.
I hope it works.
Try This:
Replace your input button code with the following code :
<input type="submit" id="btnSave" name="BtnSave" value="Get Config WS" />
Then in controller change the whole code for this code:
public class HomeController : Controller
{
public ActionResult Index()
{
ViewBag.Message = "Test webservices";
return View();
}
public ActionResult getConfig()
{
return View();
}
[HttpPost]
public ActionResult getConfig(FormCollection Form)
{
if(Form["BtnSave"]!=null)
{
string totalRecords = string.Empty;
wsConfig.config_pttClient client = new wsConfig.config_pttClient();
wsConfig.getConfigInput gci = new wsConfig.getConfigInput();
wsConfig.getConfigOutput gco = new wsConfig.getConfigOutput();
gco = client.getConfig(gci);
totalRecords = gco.result.totalRecords.ToString();
ViewBag.totalRecords = totalRecords;
}
return View();
}
Hopefully it works...!
Related
I'm new to MVC, and currently I'm trying to create a function for my form that exports it values to PDF. I managed to do that using input with submit type that calls the controller.
My problem is when I want to keep the values in the form (because I want to create another button that will send the form as e-mail), but the form resets after clicking on the button.
I tried creating void function instead of action result, but after calling, the browser tries to redirect to another page with controller names as URL.
I also tried to change the input type from submit to button, but after changing it, it won't call the controller on click.
So there is my question, how to call the controller without causing the form to reset its values.
Here is index.cshtml that calls the controller
<div class="row clearfix">
<div class="input-group">
<input id="pdfBtn" value="Export to pdf" type="submit" formaction="#Url.Action("pdfExport")" />
</div>
</div>
Here is the controller
[HttpPost]
public ActionResult pdfExport([Bind(Include = "formId,formType,additionalTypeInfo,nameSurname,description,Attachment")] FormModel model)
{
if (ModelState.IsValid)
{
var pdf = new FormToPdf(model);
}
return RedirectToAction("Index");
}
You can try to return the model to Index action like this:
[HttpPost]
public ActionResult pdfExport([Bind(Include = "formId,formType,additionalTypeInfo,nameSurname,description,Attachment")] FormModel [HttpPost]
public ActionResult pdfExport([Bind(Include = "formId,formType,additionalTypeInfo,nameSurname,description,Attachment")] FormModel model)
{
if (ModelState.IsValid)
{
var pdf = new FormToPdf(model);
}
return RedirectToAction("Index");
})
{
if (ModelState.IsValid)
{
var pdf = new FormToPdf(model);
}
return RedirectToAction("Index",model);
}
Or you can use ajax to pass data when button click,so that the page will not be refreshed:
<input id="pdfBtn" value="Export to pdf" type="button" onclick="pdfExport()"/>
js:
function pdfExport() {
$.ajax({
type: "POST",
url: "pdfExport",
data: Data,
success: function (data) {
}
});
}
You are doing Redirection in your server side code.
Do an AJAX call to your MVC controller (better if it is Web API controller) and from controller return HTTP OK / HTTP Accepted. While doing AJAX call using JavaScript/jQuery on button click, prevent the default behaviour (submit the form) of the button like in this way:
function onButtonClickPdfExportToServerUsingAjax(e){
e.PreventDefault();
// AJAX call
}
After receiving successful AJAX call response, proceed with whatever you want to do next.
I have an MVC view where user can set a flag and post data to controller (post because I want to hidden query string)
After the controller have done his job I want to redirect to website home page that is an aspx page (my site is mixed aspx and MVC)
Is there a way to do that?
This is my view
#model MessaggiVM
<form role="form" class="form-inline" method="post" action="Messaggi/VaiAllaHome">
<button id="btnHome">Vai alla pagina iniziale</button>
<div class="form-group">
<label for="nascondi">hiding</label>
<input id="nascondi" type="checkbox" name="nascondi" value="true" />
</div>
<input type="hidden" name="elencoPost" value="#Model.Posts" />
#*#Html.ActionLink("Messaggi", "VaiAllaHome", new { posts = Model.Posts} )*#
</form>
And this the controller
[HttpPost]
public RedirectResult VaiAllaHome(bool? nascondi = false, IEnumerable<Messaggio> elencoPost = null)
{
// do something
return Redirect(Url.Content("~/"));
}
When I run this code controller action is executed without error but redirect is not done and browser remain on the view
Other problem is that elencoPost parameter is empty in the action but I'm investigating it
EDIT
Honestly I'm thinking to post data on input change and switch button for a simply link
EDIT 2:
found the reason: in default.aspx i have a auto-redirect to Message page :(
Try
return Redirect("~/home.aspx");
or
return Redirect(Url.Content("~/home.aspx")
You should be able to use Redirect with a relative url:
[HttpPost]
public RedirectResult VaiAllaHome(bool? nascondi = false, IEnumerable<Messaggio> elencoPost = null)
{
// do something
return Redirect("/home.aspx");
}
Try using a #Url.Content on your form tag
<form action="#Url.Content("~/Messaggi/VaiAllaHome/")">
Then in your Controller
[HttpPost]
public RedirectResult VaiAllaHome(bool? nascondi = false, IEnumerable<Messaggio> elencoPost = null)
{
// do something
return View(Url.Content("~/"));
//return RedirectToAction("Action", "Controller", new { routeParameter = value } /*e.g. "id = 1"*/);
}
I'm using MVC 5, C# and I'm trying to build a search filter that will filter through upon each key stroke. It works as so, but the textbox erases after submitting. Now this is probably not the best approach to it either. Is there a way to make so when it posts it doesn't erase the textbox, or better yet, is there a better alternative?
#using (Html.BeginForm("Index", "Directory", FormMethod.Post, new { id = "form" }))
{
<p>
Search Employee: <input type="text" name="userName" onkeyup="filterTerm(this.value);" />
</p>
}
<script>
function filterTerm(value) {
$("#form").submit();
event.preventDefault();
}
</script>
I agree with the comments on your question. Posting on every key stroke would be a frustrating user experience.
So, two answers, use ajax to perform the search (which will then keep the value since the whole page will not post) or have a submit button and name the input the same as the controller action parameter.
Controller code (used with your existing code):
public class DirectoryController : Controller
{
[HttpPost()]
public ActionResult Index(string userName)
{
// make the input argument match your form field name.
//TODO: Your search code here.
// Assuming you have a partial view for displaying results.
return PartialView("SearchResults");
}
}
View Code (to replace your code with Ajax):
<p>
Search Employee:#Html.TextBox("userName", new { id = "user-name-input" })
</p>
<div id="results-output"></div>
<script type="text/javascript">
$("#user-name-input").change(function(e) {
$.ajax({
url: '#Url.Action("Index", "Directory")'
, cache: false
, type: "post"
, data: {userName: $("#user-name-input").val() }
}).done(function (responseData) {
if (responseData != undefined && responseData != null) {
// make sure we got data back
$("#results-output").html(responseData);
} else {
console.log("No data returned.");
alert("An error occurred while loading data.");
} // end if/else
}).fail(function (data) {
console.log(data);
alert("BOOOM");
});
}
</script>
A better way is to ditch your Html.BeginForm (unless you actually need it for something else) and use a pure ajax method of getting the data.
So your modified html would be:
<p>
Search Employee:
<input type="text" name="userName" onkeyup="filterTerm(this.value);" />
</p>
<script>
function filterTerm(value) {
$.ajax({
url: '#Url.Action("Index", "Directory")',
data: {
searchTerm: value
},
cache: false,
success: function (result) {
//do something with your result,
//like replacing DOM elements
}
});
}
</script>
You also need to change the action that ajax will be calling (and I have no idea why you are calling the "Index" action).
public ActionResult Index(string searchTerm)
{
//lookup and do your filtering
//you have 2 options, return a partial view with your model
return PartialView(model);
//or return Json
return Json(model);
}
The best thing about this ajax is there is no posting and it's async, so you don't have to worry about losing your data.
My current url is /Product/Create?date=5/7/2014%2012:00:00%20AM
Actually I want like this: /Product/Create
My sample code is :
public class ProductController : Controller
{
public ActionResult Create(DateTime date)
{
ViewBag.Date = date;
return View();
}
}
Any one can help me?
Assuming that this is infact a GET request for a view which requires a Date parameter (for whatever reason) I'd say your best bet is to pass the information as a custom header in the request
GET /Products/Create HTTP/1.1
X-YourApp-Date: 2014-07-05T12:00:00
Your action would then look like
public ActionResult Create() <-- no parameters
{
ViewBag.Date = DateTime.ParseExact(Request.Headers["X-YourApp-Date"],
"yyyy-MM-ddTHH:mm:ss", CultureInfo.InvariantCulture);
return View();
}
Some side notes
It's generally best to work with dates as UTC and not as Local (however it really depends on the circumstance)
If the date is important or used in anyway related to security then you should probably encrypt it.
If you are passing it up as a string use a consistent format and stick with it, this makes it easier when it comes to server-side parsing (see example)
You can use HttpPost to force this:
public class ProductController : Controller
{
[HttpPost]
public ActionResult Create(DateTime date)
{
ViewBag.Date = date;
return View();
}
}
And when calling the action you need to submit it via a form-post. If you show us the code how you call it we can help you there...
The HttpPost attribut will force you to use "post" - if you still want the "other option" possible you can leave the attribute away and just use "post" for your desired case.
UPDATE:
You need to call the action like:
#using(Html.BeginForm("Create", "Product", FormMethod.Post))
{
#Html.Hidden("date", DateTime.Now.ToString())
<input type="submit" value="create">
}
To your current code <a href="/Product/Create?date=#DateTime.Now.Date">:
This creates a GET request and even if you want that you should do it like the following:
#Html.ActionLink("Create", "Product", new { date = DateTime.Now.ToString() })
This will take the proper routing in account and create a valid link.
Using e.g. JQuery you can do the follwoing to have a link if JS is enabled:
#using(Html.BeginForm("Create", "Product", FormMethod.Post, new { id = "myForm" }))
{
#Html.Hidden("date", DateTime.Now.ToString())
<input id="myFormSubmit" type="submit" value="create">
<a id="myFormLink" href="#" style="display: none;" onclick="$('#myForm').submit(); return false;">create</a>
}
<script type="text/javascript">
$(document).ready(function () {
$('#myFormLink').show();
$('#myFormSubmit').hide();
});
<script>
In addition with controller change to handle only POST requests
...
[HttpPost]
public ActionResult Create(DateTime date)
...
You also have to change code for calling action in markup from link to something like
#using(Html.BeginForm("ActionName", "ControllerName", FormMethod.Post, new { style = "display:inline" })) {
#Html.Hidden("date", DateTime.Now.ToString())
Whatever
}
In JS:
window.history.pushState("", "", "/Product/Create");
I have this:
<div id="miniShoppingCartContainer">
#Html.Action("MiniShoppingCart", "ShoppingCart")
</div>
where MiniShoppingCart action returns MiniShoppingCart.cshtml partial view with all the content.
In this partial view I added an ajax call for increasing the quantity of product cart:
#using (Ajax.BeginForm("IncreaseProductQuantity", "ShoppingCart", new { shoppingCartItemId = item.Id }, new AjaxOptions { UpdateTargetId = "miniShoppingCartContainer", InsertionMode = InsertionMode.Replace }))
{
<li>
<input type="submit" class="btn-up" />
</li>
}
which calls a method:
public ActionResult IncreaseProductQuantity(int shoppingCartItemId)
{
//get shopping cart item
var cart = _workContext.CurrentCustomer.ShoppingCartItems
.Where(x => x.ShoppingCartType == ShoppingCartType.ShoppingCart).ToList();
var sci = cart.Where(x => x.Id == shoppingCartItemId).FirstOrDefault();
if (sci == null)
{
return RedirectToRoute("ShoppingCart");
}
//update the cart item
_shoppingCartService.UpdateShoppingCartItem(_workContext.CurrentCustomer,
sci.Id, sci.Quantity + 1, true);
return MiniShoppingCart();
}
Please note that at the end of the method I call the MiniShoppingCart ActionResult which prepares the cart and return the PartialView (as you see at the beginning of the post).
Well, the update of a product is happening fine but the content is not refreshed (or replaced)...
Can you please indicate where I am wrong?
UPDATE:
Doing an inspection with Chrome Dev. Tools I see an error when doing post:
POST http://localhost/ShoppingCart/IncreaseProductQuantity?shoppingCartItemId=11 500 (Internal Server Error)
f.support.ajax.f.ajaxTransport.sendjquery-1.7.1.min.js:4
f.extend.ajaxjquery-1.7.1.min.js:4
ejquery.unobtrusive-ajax.min.js:5
(anonymous function)jquery.unobtrusive-ajax.min.js:5
f.event.dispatchjquery-1.7.1.min.js:3
f.event.add.h.handle.ijquery-1.7.1.min.js:3
2
It's strange to guess what is the problem from this log...Basically, If I make debug I can see that it does all the operations until return PartialView(model); of MiniShoppingCart() method...
Issue found:
>The partial view 'IncreaseProductQuantity' was not found or no view engine supports the searched locations.
So basically, doing return MiniShoppingCart(); from IncreaseProductQuantity method doesn't automatically return the MiniShoppingCart partial view but will still try to return IncreaseProductQuantity partial view which of course does not exists.
Consequently, I have done it like:
var model = PrepareMiniShoppingCartModel();
return PartialView("MiniShoppingCart", model);