Action returns PartialView rather than View - asp.net-mvc

I've simplified the below for brevity.
When I click the actionlink, the action works successfully but returns only the partial view on it's own page rather than rendering it within the view. Any suggestions where I am going wrong?
PartialView ActionLink
#Html.ActionLink("Click", "_Partial1")
Controller
public ActionResult Index()
{
return View()
}
public ActionResult _Partial1()
{
...do stuff
return PartialView();
}

You can use the "Click" as below. Make sure you have reference to jQuery
<script type="text/javascript" src="/Scripts/jquery-1.8.2.min.js"></script>
Modify your Action Link as below.
#Html.ActionLink("Click", // linkText
"_Partial1", // actionName
null, // controllerName
new { #class = "detailsLink" } // htmlAttributes
)
Provide a element where you want to render the content.
< div id="details" />
Invoke the below JS, so the content will be loaded in the view or similar.
$(function() {
$('.detailsLink').click(function() {
$('#details').load(this.href);
return false;
});
});
This should invoke you partial action and renders the content on the same page.

Related

MVC ViewBag for partial view is null

Have a basic question regarding partial view.the #ViewBag.Message comes out empty in the final render.
My controller looks like this
public ActionResult Message() {
ViewBag.Message = "This is a partial view.";
return PartialView();
}
public ActionResult PartialViewDemo() {
return View();
}
My partial view looks like this in Message.cshtml
<h2>#ViewBag.Message</h2>
I am calling the partial view like this from partialViewTest.cshtml. the #ViewBag.Message is empty and only h2 tag is shown.
<div>#Html.Partial("~/Views/Sample/Message.cshtml")</div>
If i implement using javascript it works fine
<div id="result"></div>
#section scripts {
<script type="text/javascript">
$(function () {
$('#result').load('/sample/message');
});
</script>
}
You Render Message.cshtml only (not controller) from partialViewTest.cshtml. As you set ViewBag.Message in the controller, you have to call the controller (to get partial view) like this.
#Html.Action("Message", "Sample")

Can you just update a partial view instead of full page post?

Is there a way to submit a partial view form in asp.net mvc without reloading the parent page, but reloading the partial view only to its new state? Similar to how knockout.js updates using data-bind.
My data table renders with a variable number of columns/names so I don't think knockout.js is an option for this one, so I am trying to use a partial view instead.
Not without jQuery.
What you would have to do is put your Partial in a div, something like:
<div id="partial">
#Html.Partial("YourPartial")
</div>
Then, to update (for example clicking a button with the id button), you could do:
$("#button").click(function () {
$.ajax({
url: "YourController/GetData",
type: "get",
data: $("form").serialize(), //if you need to post Model data, use this
success: function (result) {
$("#partial").html(result);
}
});
})
Then your action would look something like:
public ActionResult GetData(YourModel model) //that's if you need the model
{
//do whatever
return View(model);
}
Actually, if your Partial has a child action method, you can post (or even use an anchor link) directly to the child action and get an Ajax-like affect. We do this in several Views.
The syntax is
#Html.Action("MyPartial")
The Child Action is
public ActionResult MyPartial()
{
return PartialView(Model);
}
If your form posts to the child action
#using (Html.BeginForm("MyPartial"))
{
    ...
}
The Partial View will be updated with the partial view returned from the child action.
Jquery is still a legitimate way to update a partial. But technically, the answer to your question is YES.
As normal what I find when looking for things like this is people give too limited information so I will attempt to help here. The key is to set up a div with an ID you can append the return html to. Also when hitting your controller make sure it returns the partial. There are some potential problems with this method but on a good day it should work.
<div id="CategoryList" class="widget">
#{
Html.RenderPartial("WidgetCategories.cshtml");
}
</div>
function DeleteCategory(CategoryID) {
$.get('/Dashboard/DeleteWidgetCategory?CategoryID=' + CategoryID,
function (data) {
if (data == "No") {
alert('The Category has report widgets assigned to it and cannot be deleted.');
}
else {
$('#CategoryList').html(data);
}
}
);
}
[HttpGet("DeleteWidgetCategory")]
[HttpPost("DeleteWidgetCategory")]
public IActionResult DeleteWidgetCategory(string CategoryID)
{
string Deleted = CategoryModel.DeleteCategory(CategoryID);
if (Deleted == "Yes")
{
return PartialView("WidgetCategories");
}
else
{
return this.Json("No");
}
}
I would use the Ajax Form helper for such scenarios using a partial view and #html.RenderPartial("partialName")
partial helpers
In your Main View
<div id=SearchResult>
#Html.Partial("_NameOfPartialView", Model)
</div>
<input type="button" id="btnSubmit" value="Submit">
In your Javascript file
$('#btnSubmit').click(function () {
GetData(Id);
});
function GetData(Id){
$.ajax({
url: "/Home/GetEmployee/",
type: "get",
data: { Id:Id },
success: function (result) {
$('#SearchResult').html(result);
}
});
}
In your Home Controller
public ActionResult GetEmployee(int Id)
{
var employee= context.Employee.Where(x=> x.EmployeeId == Id)
return this.PartialView("_NameOfPartialView", employee);
}

MVC Parent Child actions page rendering?

I am learning to embed a child action inside a parent action, and render the whole page properly when a form is submitted from the child action.
ParentAction.cshtml--------------------------------------
#model Web1.Models.ParentActionModel
#{ViewBag.Title = "ParentAction";}
<h2>Parent Action</h2>
#Html.ValidationSummary(true, "Please correct parent errors and try again.")
#using (Html.BeginForm()) {
//parent forminput stuff
<input type="submit" value="Parent Button" />
}
#Html.Action("ChildAction","Home") <!-- ChildAction is included here -->
ChildAction.cshtml (included in parent.cshtml) ------------
#model Web1.Models.ChildActionModel
#{ViewBag.Title = "ChildAction";}
<h2>Child Action</h2>
#Html.ValidationSummary(true, "Please correct child errors and try again.")
#using (Html.BeginForm("ChildAction", "Home")) {
//child form input stuff
<input type="submit" value="Child Button" />
}
HomeController.cs-----------------------
public ActionResult ParentAction() {
return View();
}
[HttpPost]
public ActionResult ParentAction(ParentActionModel pmodel) {
//do model update stuff
return View(pmodel);
}
[ChildActionOnly]
public ActionResult ChildAction() {
return PartialView();
}
[HttpPost]
public ActionResult ChildAction(ChildActionModel cmodel) {
//do model update stuff
return PartialView(cmodel); // <---This is wrong, What's the correct way to do it?
}
Now, when I click the "Child Button", I will only get the view of the child action (durrr!), how do I fix it to generate full page parent+children view? It seems like a logic easy enough, but I am stuck on it for hours.
So, if I removed the [ChildActionOnly] in HttpPost Details method,
when I click submit, only the Details.cshtml partialView is returned,
not with the Master.cshtml, which is not what I want, neither.
That's because you should not return a PartialView in this case, but a full View:
[HttpPost]
public virtual ActionResult Details(DetailsModel model)
{
if (!ModelState.IsValid)
{
return View(model);
}
return RedirectToAction("Success");
}
You might also need to only conditionally render the Details action to avoid infinite loops:
#if (!IsPost)
{
#Html.Action("Details", "Home")
}
Obviously if you want to preserve the original context you were in when you invoked this POST action, you will have to use AJAX and then invoke this POST action with AJAX and replace only the corresponding part of the DOM.

asp.net MVC partial view controller action

I'm very new to web app development and I thought I would start with recent technology and so I'm trying to learn asp.net as-well as the MVC framework at once. This is probably a very simple question for you, MVC professionals.
My question is should a partial view have an associated action, and if so, does this action get invoked whenever a normal page uses RenderPartial() on the partial view?
While you can have an action that returns a partial view, you don't need an action to render a partial view. RenderPartial takes the partial view and renders it, using the given model and view data if supplied, into the current (parent) view.
You might want an action that returns a partial view if you are using AJAX to load/reload part of a page. In that case, returning the full view is not desired since you only want to reload part of the page. In this case you can have the action just return the partial view that corresponds to that section of the page.
Standard mechanism
Making use of partial view within a normal view (no action needed)
...some html...
<% Html.RenderPartial( "Partial", Model.PartialModel ); %>
...more html..
Ajax mechanism
Reloading part of a page via AJAX (note partial is rendered inline in initial page load)
...some html...
<div id="partial">
<% Html.RenderPartial( "Partial", Model.PartialModel ); %>
</div>
...more html...
<script type="text/javascript">
$(function() {
$('#someButton').click( function() {
$.ajax({
url: '/controller/action',
data: ...some data for action...,
dataType: 'html',
success: function(data) {
$('#partial').html(data);
},
...
});
});
});
</script>
Controller for AJAX
public ActionResult Action(...)
{
var model = ...
...
if (Request.IsAjaxRequest())
{
return PartialView( "Partial", model.PartialModel );
}
else
{
return View( model );
}
}
The accepted answer is completely correct, but I want to add that you can load your partial view using jQuery load. Less configuration needed, if you don't want to consider concurrency.
$("#Your-Container").load("/controller/action/id");
I was able to achieve something similar with this logic.
Within the .cshtml
#Html.Action("ActionMethodName", "ControllerName");
Within the controller
[Route("some-action")]
public ActionResult ActionMethodName()
{
var someModel = new SomeModel();
...
return PartialView("SomeView.cshtml", someModel);
}
And that's it.
If you need to pass values from the .cshtml to the action method then that is possible to.
The answer is no. But sometimes you need some controller action behind a partial view. Then you can create an actionMethod wich returns a partial view. This actionMethod can be called within another view:
#Html.Action("StockWarningsPartial", "Stores")
The actionmethod can look like:
public ActionResult StockWarningsPartial()
{
....
return View("StockWarningsPartial", warnings);
}
and the view 'StockWarningsPartial.cshtml' starts with:
#{
Layout = null;
}
to make it not render your surrounding layout again.
public ActionResult GetStateList(int country_id)
{
List<stateDTO> stateList = new List<stateDTO>();
stateList = bll.GetState(country_id);
ViewBag.sList = new SelectList(stateList, "state_id", "State_Name");
return PartialView("DisplayStates");
}

How do you close an ASP.NET MVC page from the controller?

I have an ASP.NET MVC app that opens a "Request" view in a new browser window. When the user submits the form, I'd like the window to close. What should my RequestController code look like to close the window after saving the request information? I'm not sure what the controller action should be returning.
You could return a View that has the following javascript (or you could return a JavaScript result) but I prefer the former.
public ActionResult SubmitForm()
{
return View("Close");
}
View for Close:
<body>
<script type="text/javascript">
window.close();
</script>
</body>
Here is a way to do it directly in your Controller but I advise against it
public ActionResult SubmitForm()
{
return JavaScript("window.close();");
}
Like such:
[HttpPost]
public ActionResult MyController(Model model)
{
//do stuff
ViewBag.Processed = true;
return View();
}
The view:
<%if(null!=ViewBag.Processed && (bool)ViewBag.Processed == true){%>
<script>
window.close();
</script>
<%}%>
It sounds like you could return an almost empty View template that simply had some javascript in the header that just ran "window.close()".
You can close by this code:
return Content(#"<script>window.close();</script>", "text/html");
This worked for me:
[HttpGet]
public ActionResult Done()
{
return Content(#"<body>
<script type='text/javascript'>
window.close();
</script>
</body> ");
}
This worked for me to close the window.
Controller:
return PartialView("_LoginSuccessPartial");
View:
<script>
var loginwindow = $("#loginWindow").data("kendoWindow");
loginwindow.close();
</script>
Using this you can close the window like this:
return Content("<script language='javascript'>window.close();</script>");

Resources