Im working on a .NET Core Web Application.
I need to creata a PDF from HTML. My idea is to use a controller and view to make the HTML and then convert it to PDF.
How do i call the controller and make it return the HTML inside the project instead of serving it.
The html wont be sent to a client. Only used to create an HTML. Maybe a controller/view is not the way to go?
Related
I think there is something that I don't understand as I proceed forward in my project of importing D3 visuals into Spotfire.
I currently have implemented a D3 visualization into Spotfire by using Awesomium's embedded browser and these lines:
string myString = System.IO.File.ReadAllText(#"C:\Users\leear\Desktop\SDK\SDK\Examples\Extensions\D3Visualizations\Gauge.html");
webView.LoadHTML(myString);
The HTML of Gauge.html contains javascript code that runs all the necessary things to create the visualization.
However, I want to be able to access/run C# functions and variables inside the Gauge.html file. I am envisioning something like this:
for (var value in <%=Spotfire.getCurrentColumn()%>) {gauge.redraw(value)}
My project is currently structured just for the C# code to read and write all the HTML from a file into Awesomium's embedded browser.
How would I do this? Where does aspx.NET fit into this, if at all?
Thanks
You can't; javascript is client-side, and ASP.NET is server side. ASP.NET basically generates HTML and javascript, and once that rendering is done the page is processed the client-side takes over, which it knows nothing of ASP.NET. It's perfectly fine for ASP.NET to spit out JS becuase it's RENDERING it, but the client-side PROCESSING of JS, which is where you are trying to call a server-side method knows nothing of ASP.NET. You'd have to move the logic to the client, or have the client talk to the server using javascript.
I can't advise further as I don't know what that method does.
"You can't; javascript is client-side, and ASP.NET is server side. ASP.NET basically generates HTML and javascript"....
This is absolutely correct. Client and server are two different worlds...
You have a couple of options if you need to get code-reuse.
Look into a C# to javascript compiler..and make sure your C# functions don't depend on anything related to the server or its runtime.
Otherwise, consider exposing your server functionality as a web service that takes input of some form and returns output as JSON for use on the client side.
I am developing a movie library application in asp.net. In admin page, I need to add a movie to the database(details such as name, actors, poster url). And also I need to upload the trailer of the movie to a specific folder in the server.
In my AddMovie View(which is strongly typed to a MovieDetails Model), I have a forms to include movie information as text and with a file input to upload a file(movie trailer). Within my controller I get the binded MovieDetails model and the uploaded file seperately as two parameters as follows.
At first I just posted from my view to this controller without using ajax. I was able to get the Model and the file to the controller to do what I needed to do.
Then I moved to ajax and tried to do this without page refresh.
Now no files cannot be uploaded. I tried to debug and noticed that uploadFile parameter of the controller is null although I attached a file to the file input in the view.
Is there any way to post the model to the controller and upload the file without completely changing the controller and using a single ajax call?
Or else is it possible pass the file path through a model attribute, access that file path and upload the relevant file in the controller, using Ajax.
Thank you!
As Darin mentioned, there is no simple way to handle file-uploading matters via ajax for some security reasons and you can't upload files to your server easily; but good news is there are some tricks which can resolve it, for instance, you can use jquery AjaxForm in your mvc form easily with a bit little modification. Take a look at jquery-ajax-form and its samples, you will get some good idea around it.
Normally you cannot upload files using AJAX. Modern browsers that support FormData would allow you to directly make AJAX requests containing multipart/form-data content. Also look at the native XMLHttpRequest object.
But if you need to support legacy browsers you will need some fallback mechanism such as hidden iframes or Flash movies. Plugins such as blueimp would detect the browser capabilities and upload the file using the best option that the browser supports.
I'm building SPA application using Backbone.js and as its back-end I want to use ASP.NET Web API. I need only one page and this fact brings me a lot of confusion.
ApiController returns json response and as far as I understand there's no need in asp.net-specific views at all. Am I right?
Can I use plain html for my main page? Or should I use *.cshtml and put a call to RenderBody instead?
If choose the first option then how will I handle validation?
Thanks!
Well the trick is that if you want search engines to be able to index your page, or people to be able to share to Facebook with a custom icon/description, etc you'll need to serve back static HTML -- none of those bots are able to run your javascript to render the page as the browser does.
If you're uninterested in this, then yes, you can completely avoid RenderBody.
I have a controller with an action:
SomeController/ActionToBePrinted
ActionToBePrinted() returns an html view.
This action is called from a normal mvc razor view when pressing a button - how would I go about sending the content of the view to a printer when the button is pressed?
Aloha,
Hugo
You cant send direct to the printer.
I suggest you to create a custom ActionResult, that returns a PDF file or something like that. ASP.NET MVC Action Results and PDF Content
You can show a html page as well and open the print dialog using javascript like this
Click to Print This Page
But always the user has to start the print process, you cant do this programmatically.
You can perform a GET request (e.g. use window.open() and pass in URL or use AJAX) and put the returned HTML contents into a new window. Then use
Window.print(). Then simply close the window when you are done.
You could tie this directly into a single view by adding something in the body, but I prefer to use JavaScript in these cases. This keeps the design acting as a re-useable object or service that can be used across multiple views. In other words, you setup the controller-model, but no view. Instead, JavaScript steps in as the View.
Keep in mind that HTML is not a print format. So if you need to control the layout, you should be using a print technology such as PDF. XSLT provides an excellent means to create both HTML and PDF output using the same data, albeit it's a lot more work to create XSLT templates than it is to slap down window.print
Personally, I have an MVC page acting as a service that takes URL parameters. The page hooks into Adobe XSL-FO and uses the params to drive the output.
Hi Im working on a MVC3 Razor project and I have been stuck on this problem for a few hours now...
I'm trying to get a html to pdf converter to serve a document to the user...
What I want is the following..
A page is rendered and displayed. On the bottom of the page there should be a little icon display something like download as pdf. and what that does is where my problem lies..
All the data that I want is dynamically created within a $("#content").html();
So what I have tried is a jquery/ajax function passing $("#content").html(); as a paramater to my function which creates the pdf (works but I have no clue how to prompt the created file to the user?)
Other solution was #(Html.ActionLink()) but I dont know how to pass the data ($("#content").html()) within that link?
And when trying to work with the functionallity to use the converter to go to the url was a dead end cuz it got its own session and got redirected to the loginpage..
Any help would be appriciated!
I am not familiar with JavaScript, but what if you save the PDF in the temp file first by calling you web service method, and then after it completed you can use JavaScript to navigate to the URL where generated PDF will be returned as content.
Since the XmlHTTPRequest Object cannot handle datatypes other than html, text, json, jsonp and xml you will need to redirect to the pdf location.
I'm not sure what exactly you're doing in your Ajax Request, but once that is completed you can just redirect the window(Form-Action) to the location of the created PDF. This wouldn't actually redirect the browser but only prompt for saving the file.
Why just create a function that returns the created PDF (during ajax request) as File result and then set the window's location to point to this action once the ajax request is completed successfully?
Edit: That means you are not saving the PDF anywhere. So the workaround, is to either use this jquery download plugin or append an iframe dynamically and then post the data through it. Hope this helps.
Figured out a workaround, what I did was write an extension to my HtmlHelper and use that to render my control into a html string instead of a view. Therefor I could use a actionlink to say render this page and get all the html data that way.
http://msug.vn.ua/Posts/Details/3301
Thanks for help tho!