I Have a View Folder
FrontEnd
JobDetails.ascx (View)
Another View Folder
Job
Apply.ascx (view)
I have a Apply (a href) in jobdetails which have a show and hide div mechanism for apply (Rendering Apply.ascx in JobDetails
<div id="div1" style="visibility:hidden">
<% Html.RenderPartial("../../Views/Jobs/Create"); %>
</div>
my create View in job
<% using (Html.BeginForm("Create", "Jobs", FormMethod.Post, new { enctype = "multipart/form-data" }))
{%>
<%: Html.ValidationSummary(true) %>
<table border="0" cellpadding="0" cellspacing="0">
<tr>
<td></td>
</tr>
<tr>
<td>
<% } %>
the question is that how would i go back in the JobDetails View if some Error occurs in my create form to display the errors there . I am at lost here , hope that the question is clear enough.
Probably the simplest way to handle this is to do the post of the apply via AJAX and simply render the apply form with the errors in place by replacing the existing HTML with that returned when the apply fails. If javascript is turned off, then it will render just the failed application but that seems like a reasonable trade-off to me.
Related
I'm working on an application that makes some calls to the Twitter and Spotify APIs. After the user is authenticated with twitter, they are redirected to playlist.erb which is the callback url.
My problem is that the playlist.erb page takes a while to render because first we must make a call to fetch all tweets found on the users Twitter page, then try to find information about songs/artists, then use the Spotify API to search for a song that is closest to what information the user specified. Doing this for each tweet takes quite a while. For 10 tweets it sometimes takes between 5-10 seconds. The limit is 50 tweets in total.
The current playlist.erb page after it is fully loaded looks like this.
My question is, is there a way that I can render the page first, then get the partials for each individial tweet to render one at a time,
adding a new row for each tweet as it loads?
I've read that I should use something called AJAX, but I'm not sure how exactly to implement that here.
Also I'm aware that my view could use fixing in terms of CSS refactoring and not using the deprecated <center></center> HTML tags. And I should probably do a whole refactor of the system using proper MVC.
In the playlist.erb, a call to the Twitter API is made through the TweetsController to find all tweets from a page. the _tweet.erb partial is then rendered to this view for each tweet when new_tweet(tweet.text) is called. This method makes a call to the Spotify API to find details about the song mentioned in the tweet.
new_tweet is a method in a helper called playlist_helper.rb.
load_tweets is a method in a controller called tweets_controller.rb.
I realise that this is quite a bit of logic to put in a view, which is why the page takes quite long to load I guess.
playlist.erb
<% loaded_tweets = TweetsController.load_tweets(current_user) %>
<% if loaded_tweets.any? %>
<table class='tweet_view'>
<thead>
<tr class='tweet_row'>
<th class="fixed_cover"><div class='tableheader'><h6 style='color:white'>Cover</h6></div></th>
<th class="fixed_spotify"><div class='tableheader'><h6 style='color:white'>Spotify</h6></div></th>
<th class="fixed_title"><div class='tableheader'><h6 style='color:white'>Track title</h6></div></th>
<th class="fixed_artist"><div class='tableheader'><h6 style='color:white'>Artist</h6></div></th>
<th class="fluid"><div class='tableheader'><h6 style='color:white'>Album</h6></div></th>
</tr>
</thead>
<tbody>
<% loaded_tweets.reverse_each.each do |tweet| %>
<%=new_tweet(tweet.text)%>
<% end %>
</tbody>
</table>
<% else %>
<center>
<p><h8><b>No tweets found!</b></h8></p>
</center>
<% end %>
The _tweet.erb partial just adds a new row for each song.
_tweet.erb
<tr class='tweet_row'>
<td class='tweet_column'>
<div class='tablerow#cover'>
<%= image_tag(#cover,:class => 'album_cover')%>
</div>
</td>
<td class='tweet_column'>
<div class='tablerow#spotify'>
<h5><%= link_to image_tag('spotify', :class => 'spotify_image'), 'https://open.spotify.com/track/'+#spotify %></h5>
</div>
</td>
<td class='tweet_column'>
<div class='tablerow'>
<h5><%=#track_name%></h5>
</div>
</td>
<td class='tweet_column'>
<div class='tablerow'>
<h5><%=#artist%></h5>
</div>
</td>
<td class='tweet_column'>
<div class='tablerow'>
<h5><%=#album%></h5>
</div>
</td>
</tr>
Change playlist.erb to playlist.html.erb
<div id="tweets">
<%= render 'tweet') %>
</div>
....
....
<script>
$( document ).ready(function() {
// call the controller function here
});
</script>
In controller methode add
....
....
respond_to do |format|
format.js
end
create one more file in views folder like action_name.js.erb and add
$('#tweets').html('<%= j(render "tweet") %>')
I have a MVC project I inherited. On the views, there's no route (controller and action) specified in the BeginForm tag. The view renders correctly so I assume it is picking a default route.
My question is how does it know what route to use if one isn't specified? What's the best practice here: should you specify a route or let it default?
So the view is Views/Config/WorkCodes.cshtml and the tag is
Html.BeginForm()
It goes to the controller ConfigController.cs and calls action WorkCodes(). If I was doing the project, I would have wrote
Html.BeginForm("WorkCodes", "Config", FormMethod.Post)
How does MVC know which controller and action to use without specifying it?
WorkCodes.cshtml
#{
ViewBag.Title = "Work Codes";
}
#using (Html.BeginForm())
{
<div>
<table style="width: 100%;" class="trHoverHighlight">
<tbody>
<tr>
<td>
<br />
<div>
<button id="buttonCreateNew" type="button">Add New</button>
<button id="buttonReturn" type="button">Return</button>
</div>
</td>
</tr>
</tbody>
</table>
</div>
}
ConfigController.cs
public ActionResult WorkCodes()
{
return View(Rep.GetWorkAll(true));
}
Here's where the view is called from in another view:
#foreach (var itm in (List<string>)ViewBag.ListObjects)
{
<li>
Work Codes
</li>
}
The View is generated from performing HTTP GET to the WorkCodes controller action, thus by default the form generated in that view performs an HTTP POST to a controller action with the same name.
Here's the MSDN docs.
BeginForm(HtmlHelper) Writes an opening tag to the response.
The form uses the POST method, and the request is processed by the
action method for the view.
I have a user control: VendorDDL.ascx, with the following code:
<%# Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl<List<MeetingCalendar.Models.Vendor>>" %>
<table>
<tr>
<th></th>
<th>
VendorId
</th>
<th>
VendorName
</th>
</tr>
<% foreach (var item in Model) { %>
<tr>
<td></td>
<td>
<%= Html.Encode(item.VendorId) %>
</td>
<td>
<%= Html.Encode(item.VendorName) %>
</td>
</tr>
<% } %>
</table>
My view: Create.aspx, has the following code snippet:
<p>
<label for="VendorNameSearch">Vendor Name:</label>
<input type="text" name="VendorNameSearch" id="VendorNameSearch" style="width:100px" />
<input type="submit" value="search" />
</p>
<% Html.RenderPartial("VendorDDL", MeetingCalendar.Controllers.HomeController.VendorsToSelect); %>
And everything works fine when I load up the Create view. The VendorDDL control is populated with the default values that are found in the VendorsToSelect. My controller has a List<Vendor> VendorsToSelect, which is getting updated properly.
Here is the problem: when the user clicks the SEARCH button, this fires off code in the Controller: return PartialView("VendorDDL", VendorsToSelect); I can see that VendorsToSelect is getting populated correctly based upon the user search.
I can step through the code, line-by-line, and see that immediately after return PartialView("VendorDDL", VendorsToSelect);, the debugger goes directly to the VendorDDL.ascx, and I can see that the Model is properly populated with the new VendorsToSelect, and the item.VendorId and item.VendorName are showing the correct values. But when debugging is done, and the Create view is shown, the VendorDDL control is not showing the new data.
Any suggestions?
I think that the output of your controller is discarded because the view (Create) has the same Html.RenderPartial("VendorDDL", MeetingCalendar.Controllers.HomeController.VendorsToSelect) as during initial load.
If I understand your problem correctly (and admittedly, without looking at the controller I may not) - you need to pass the model dynamically. The simplest (but not the most efficient) way would be to have jquery call $.load("/Home/VendorDDL") that would populate with the whole model; and then on submit hijax the form and pass form data to the same controller action.
I'm starting to develop in ASP.NET and I can't find any example of a very simple use-case:
I've got some model objects displayed on a view.
I added a checkbox so that the user can choose the one he/she wants to see.
Then the user clicks on a link and he/she should see the model objects he/she selected displayed in another view.
1) What's the best way to get the selected items list?
At the moment I decorated my model with an IsSelected property because that's what I'd do in a ViewModel but that may not be the right answer.
2) How to pass the selected data to the next controller?
In all the examples that I've seen, data is "hardcoded" in the link and is per-object.
I haven't seen any example of a user-selection in any sample from the ASP MVC site.
EDIT: I'm afraid it wasn't that clear. What I've got is that:
<table style="width: 100%;">
<% foreach (Vehicle vehicle in Model)
{ %>
<tr>
<td>
<% 'Here be bound checkbox' %>
</td>
<td>
<%= Html.ActionLink("Show", "Index", "Map", vehicle.Name, null) %>
</td>
<td >
<%= Html.Encode(vehicle.Name) %>
</td>
<td >
<%= Html.Encode(vehicle.LastPositionReceived) %>
</td>
<td >
<%= Html.Encode(vehicle.Status) %>
</td>
<td >
<%= Html.Encode(vehicle.LocationDescription) %>
</td>
</tr>
<% } %>
</table>
By clicking on the Show link, I can already show a SINGLE item details.
Now I'd like to have the checkbox bound to a property of my model so that I can then trigger an action (with a link or a button) so that only the SELECTED items are sent to the controller.
This is the part that I haven't seen any examples about.
I could add
<% TempData.Add("Vehicles", Model); %>
somewhere and then the vehicles would be passed to the controller but I still need a way to bind the IsSelected property to the model (I don't want to hook up the Checked event and do it manually).
I hope that makes things a bit clearer.
(Thanks for the quick reply BTW ;) )
Honestly, you are not giving much information for us to give a proper answer. But here is a simple example of how you could accomplish what I think you described.
Suppose this is the part in your view where you are listing the selections to the user :
<%foreach (YourModel m in (List<YourModel>)ViewData["ModelsToList"]) {%>
<p>
<input name="selection" type="radio" value="<%=m.ID%>" id="model-<%=m.ID%>" />
<label for="model-<%=m.ID%>"><%=m.Name%></label>
</p>
<%}%>
Then you post that form to a controller action like this :
public ActionResult ShowSelectedModel(int selection) {
YourModel selectedModel = yourModelRepository.getModel(selection);
return View(selectedModel);
}
Then in your ShowSelectedModel view you can display the user's selection.
Was that what you had in mind?
I'm trying to implement something like this:
<div>
<table>
<thead>
<tr>
<td>Port name</td>
<td>Current port version</td>
<td>New port version</td>
<td>Update</td>
</tr>
</thead>
<% foreach (var ip in Ports) { %>
<tr>
<td>
<%= ip.PortName %>
</td>
<td>
<%= ip.CurrentVersion %>
</td>
<td>
<%= ip.NewVersion %>
</td>
<td>
<asp:Button ID="btnUpdate" runat="server" Text="Update" CommandArgument="<% ip.PortName %>" />
</td>
</tr>
<% } %>
</table>
</div>
The button's CommandArgument property is where my code complains about not being able to resolve symbol ip. Is there any way to do what I'm trying to do?
You don't want to use a Webforms button in ASP.NET MVC. MVC is a completely different way of working, and you no longer have the WebForms abstraction.
You have 2 different options you can either replace your asp:Button with an input tag or use a standard hyperlink instead. If you use the input option then you will need to wrap in a form element. The form action should point to a Controller action.
You can't use webform controls in ASP.NET MVC in a trivial manner because they rely on things that are stripped out in MVC. Instead you add a button in two ways, both using the HtmlHelper on the ViewPage:
You can add a button in a form, which is easily handeled in a controller if you have a form for each single button:
<% using(Html.BeginForm("Update", "Ip", new {portName = ip.PortName} )) { %>
....
<input name="action" type="submit" value="Update">
<% } %>
BeginForm() will default to the same controller and action as the view was created from. The other way is to add a link instead, which is more fitting to your example of iterating through a list. For example lets say you have IpController
<%= Html.ActionLink("Update IP", "Update", "Ip",
new {
portName = ip.PortName
})
%>
The link will go to the Update action in IpController with the given portName as parameter. In both cases you'll need this action in IpController:
public ActionResult Update(string portName) {
// ...
}
Hope this helps.
I think you have to enclose your block in Form tags ans runat=server.
FWIW,
I think this text is missing an equals sign:
CommandArgument="<% ip.PortName %>"
Should be
CommandArgument="<%= ip.PortName %>"