I am trying to create an autocomplete text box based on an ArrayList from my main page's cs.
I am fairly new to JQuery and I am wondering what the best way to call the ArrayList from that page would be.
I feel like I have search all terms possible but all I can find are AutoComplete examples that either create the Array in a variable before it executes the script or it makes a vague reference to calling a URL.
Thanks for any information on this.
This is what I have so far in my newby experience.
<script type="text/javascript">
$(document).ready(function(){
$("#example").autocomplete("Requests.aspx.cs");
});
</script>
A few things....
You don't call Request.aspx.cs (that is a code file that gets compiled). The client served page is Request.aspx, and that's what you need to call.
Since you're using the jQuery UI Autocomplete, the Request.aspx will need to respond with JSON data in the correct format (I believe it is a 3 field object with id, name and value).
Request.aspx will need to be setup to take in a parameter (I believe it is called term), do logic to lookup, and return the results of that lookup serialized as JSON. There are C# classes to help with JSON serialization.
You've got quite a few things you need to go figure out in order to achieve this. Hopefully the above will help get you started.
You can create a $.ajax request for the page Request.aspx, whose code behind should return your data. Then use the jQuery autocomplete.
Edit:
If you want to take the approach that Matthew has suggested, I would suggest checking out this page ASP.NET AJAX from ScottGu, as it describes a way to make server-side service calls directly from your javascript and should eliminate any mess JSON handling on your end.
May be you could expose some kind of restful service for this purposes.
Related
I have tried to follow this post in order to create a 3 page form wizard that passes data to each page.
He uses the HTML helper serialize, to serialize an object in the view.
#Html.Serialize("wizard", Model)
However this HTML helper isn't available in MVC 5 it seems.
I found another related post to this here where he suggests using the following to serialize the object.
#Html.Hidden("otherComplexData", new Microsoft.Web.Mvc.MvcSerializer().Serialize(complexObject))
But I then get the following error
There is no argument given that corresponds to the required formal parameter 'mode' of 'MvcSerializer.Serialize(object, SerializationMode)'
It seems to want a SerializationMode, however the documented one doesn't. https://msdn.microsoft.com/en-us/library/microsoft.web.mvc.mvcserializer.serialize(v=vs.118).aspx
What direction can I go in now?
Thanks.
Here's the Serialization option you need:
https://github.com/ASP-NET-MVC/ASP.NET-Mvc-3/blob/master/mvc3/src/MvcFutures/Mvc/SerializationMode.cs
Options are Signed or EncryptedAndSigned.
You can try that and see if it will work.
There's multiple ways to encode data that will work for you. You could put the values in a hidden input using Json.Encode for the view, and Json.Decode on the server side.
I'm working on a website that has a JavaScript function I want to call passing in a value when a hyperlink is clicked. I'm generating some table rows in the view like this:
foreach(var e in Model.Collection)
{
...
//This is just an example piece of code that tries to get the big picture
//across. I want to call the JS function below passing in the ShipAddress property
<td>#e.ShippedDate</td>
...
}
And I have a JavaScript function like this:
function popup(data)
{
$('#lblShipAddress').text(data.Address1);
...
// rest of code to fill out labels in a div
$('#divShipInfo').dialog('open');
}
I'm having issues getting the ShipAddress property(which has a number of properties i.e. Address1, Address2, etc.) passed into the JavaScript function from the View. The
href="javascript:popup(#e.ShipAddress)" part doesn't work, and I've also tried using data attributes e.g.
<a href="javascript:popup();" data-shipAddress="#e.ShipAddress" />
but have not had any luck.
EDIT: Added some clarity to what I'm looking for. If at all possible I would like to only pass the ShipAddress property to the function.
By default, just #e.ShipAddress is going to return the equivalent of .ToString(), which is not useful for your method as input. Instead, you'll want to JSON serialize the object like:
#e.ShippedDate
This will result in final html something like:
#e.ShippedDate
And so the popup method would have access to the object values.
Warning: make sure there aren't any fields on your address object that you don't want leaked to your end consumers - Json.Encode will serialize all public properties.
First, I wouldn't use javascript:popup() - try one of these. Also, don't use the quote marks with the razor syntax, or it probably won't evaluate the variable.
If none of that solves it, then it could be a timing issue. I've had a lot of trouble with MVC-controlled pages (as opposed to use JavaScript/jQuery and callbacks) not updating when you think they will. For some reason, the MVC controller deals with the button press, runs the server-side code, updates the page objects... THEN releases control to JavaScript, et. al.
It basically makes using JavaScript with the built-in Microsoft controls almost impossible.
I'm working in an Asp.Net MVC 3 project where in one of my javascript file, a message is displayed to the user. This message in currently in one language but I want this message to be in multiples languages. I don't want to store theses languages directly in the javascript file but instead in a database. I want to know if it possible to transfer data (string) from the view to the javascript file.
One solution that I've found is to set data from my view in hidden fields and then extract it from my javascript file. The problem with this solution is that I must put a lot of hidden fields and this is very hard to maintain.
Is there any other solution to this problem?
You can try JavaScriptModel ( http://jsm.codeplex.com ).
With this library you can add variables by calling the following function in your controller action:
this.AddJavaScriptVariable("VariableNameInJavaScript", SomeValue);
You can pass primitive types or complex types.
Furthermore you could execute javascript functions with the following code in your controller action:
this.AddJavaScriptFunction("FunctionInJavaScript", SomeParameter, AnotherParameter);
Yes, your on the right path. All you need to do is hydrate your model appropriately and use Razor syntax to pass the value from the server to the client "along the following lines":
<script src="#Url.Content("~/scripts/yourapi.js")"></script>
<script>
yourapi.foo('#Model.SomeValue');
</script>
I have my script.js into the folder script.
I'd like to manage, into that script, some C# variable, from a Web Form (e.g. <%= myString = 3 %>).
I think this is not possible, but maybe can I do it in some way? Thank you
Javascript is client side executed code, and C# is server side executed code. So you can't strictly make a "variable" visible, as they're two completely different code platforms/runtimes, running on two different computers. However you can still marshal the data between them in a few different ways.
Write a web service and call it via AJAX
Populate a control or your URL for your page with your data, and query it via the Javascript DOM API (or via some wrapper library like jQuery)
An example of the 2nd (since you asked):
<!-- Somewhere in your page -->
<span style="visibility:hidden" id="myData"><%= myString %></span>
// In Javascript, using jQuery:
var myData = $('#myData').text();
If the variable is directly related to a particular element on the page then you should definitely consider using the HTML5 data-* attributes to store the value. Imagine the variable pertains to the an anchor element, you could output like so:
Blah
You can then access the variables with jQuery like so $("#myLink").data("myVar") (note the camel case). jQuery will attempt to convert value to the correct type. If you want the raw value then just use the attr jQuery method like this $("#myLink").attr("data-my-var") (note the attribute name has not changed).
Alternatively you could do the following in your server-side code to output to your page:
<script type="text/javascript">
var myVar = <%= someVariableToOutput %>;
</script>
As long as this code is output above your dependent script it will be accessible as with any other JS variable.
Finally, you could execute an AJAX request when the page is loading and get the variable that way (though this may not be applicable if the data is only available during the main request)
Hope that helps
I am currently using a number of query string parameters to pass some data from one page to a second page (the parameters hold confirmation/error messages to display in the second page), that due to a third party product can no longer work correctly in the production environment. The user completes an action on the first page, and is then transferred to the second page. What are the possible alternatives to use instead of a query string and GET - session variables, POST data, or something completely different?
Thanks, MagicAndi.
You could create public properties in a source page and access the property values in the target page when using a server transfer. You could also get control information in the target page from controls in the source page by referencing the Page.PreviousPage property.
Both of these methods are oulined here: http://msdn.microsoft.com/en-us/library/6c3yckfw.aspx
Both POST data and session variables would work just fine. POST data has the drawback that it can be changed by the client and session variables take up memory, so you can choose based on that. I personally don't think that you should pass such messages to the client for the reason stated above but I guess you are already doing that, so...
you can use this if you use window.open("openTheotherPage",...etc)
so form the opened page you can do something like this
var valuefromCallerPage = window.opener.document.FormNmae.textbox.value
or button or anything on the caller page