I have a C# class method that return a xml document not file.
How to read C# method output from javascript???
I don't wont to use script manager.
Any ideas?
A similar Question was asked in this thread
call a vb.net subrouting from a javascript function?
In ajax you can use jQuery, very simple to use if you don't want to use script manager.
You need to be more specific. Are you creating a control that has client functionality or you just need to expose the XML on the client? In the first case you can pass it through a script descriptor, in the second, you can use a web service and call it from javascript. Please provide more details.
Related
I'd like to know whether it's possible to pass data from a C# application (e.g. WPF) to a web-page (i.e. an HTML page with Javascript) in an embedded Web Browser. If so, how?
Thanks in advance for your help!
You can invoke methods (and thus pass data) in your C# code from JavaScript using Window.external. Try googling for this keyword, more information will come up quickly.
This blog post has a good, simple (WPF-)example how to invoke a C# method from JavaScript using Window.external. Another keyword here is [System.Runtime.InteropServices.ComVisibleAttribute(True)]. You have to mark your handler class with this attribute to be accessible from JavaScript. And finally you tell your WebBrowser control about the handler class via its ObjectForScripting property.
I know the method that, from jQuery, using ajax I can invoke WebMethod from a aspx or asmx file. That's ok, but I only can place my project logic in ascx.cs files. It is a specific CMS and I can't do anything about it.
So my question is based on example described below:
Lets say users is logged in and is viewing an article. One user wants to mark it as a favourite, so clicks a button. On the server side without, refreshing the page, an appropriate method should run which adds this article to his favourites and then in client side there is an alert - 'Success'.
I dont want anyone to write the code for me for that it is just an example for desribing what functionality I would like to be able to achieve and which technology to use for that.
Thanks for the help.
P.S. I'm using ASP.Net 2.0
ASCX files are not directly accessible from the client (and as such, cannot be targeted via AJAX calls).
If your logic really has to be encapsulated in the ASCX file, you can add in an entrypoint WebMethod in your ASPX that calls the respective ASCX method instead. You'll probably encounter some difficulties related to the WebMethods being static though, so you may eventually need to refactor a bit, depending on how your code is structured now.
You can make ajax call to remote page (with ascx control with your server side method) and then parse output (for example look for world "SUCCESS") to verify, that your method is executed. Not very elegant, but it will work.
This will probably sound dumb, but I need to execute a C# code from my html file. For example I just want to execute this
System.Diagnostics.Process.Start(#"D:\Movies\HurtLocker.avi");
Not any server side code.
I can't create aspx page, because to open an aspx page in a browser it needs to be hosted in IIS.
You can't execute server side code from a client side page. If your page is aspx you can use a webservice or click a serverside button from javascript.
Edit: If you want to embed a video player please check this link. You don't need server side code for this. You'll be able to do it with javascript.
Where do you want the c# code to run?
If you want it to run in the browser that is being used to render the html then I'd say that was basically not possible. Something, presumably javascript code in the html page, would have to somehow instantiate a .net clr and pass the c# code to it for execution. The clr does have a COM-based hosting interface that would allow instantiation, but even if you could call this from javascript I think that any sensible browser security settings would prevent it.
If you want the c# to run on the server supplying the html page then you should use asp.net.
EDIT
Ok, you want to run it in the browser. I'm not aware of any examples for hosting a clr in the browser process, sorry.
You can create activex/com objects in js using something like var obj=new ActiveXObject("<comclassname>");, and you might be able to create a CLR that way by instantiating one of the COM classes (maybe CLRRuntimeHost) listed on this page. You could then pass your c# code to your clr for execution. More info here and here. I'm really not sure if that would work, though. I've never used the hosting api, I just know it exists!
Seems like an interesting project to try if you are curious, but deploying this in a real environment would likely present lots of problems. Good luck!
Not C#, but how about .NET dynamic language in the browser with Gestalt? http://gestalt.codeplex.com/
You can create a code block in your ASP file but if this is simple HTML file this is not possible.
At least you will have some application that will read the content of the page compile it and execute.
ASP code block
As Pabuc mentioned you can't execute server side code on the client machine in HTML. If you were to use Silverlight you could execute the code client side, but then the client need to have Silverlight installed and it is not strictly HTML anymore.
Silverlight could be used to play movies client side with C#.
The only way to have C# on client side is Silverlight application [update] or any other browser plugin as #kenny mentioned.
I have tried to find a software for this some time. I have software, which has needs, that are hard to make with traditional Web programming.
Now I have made simple demo, how to create HTML5 online application with C# or VB.NET.
It is Scot library which translates C# to Javascript on time when executing .NET application. It also supports events on Browsers, which is executed in c# code.
To original question:
On the Html page you will need to add single line after :
<script src="myclass.cs"> </script>`
to connect .Net class:
using Scot;
//..
public myclass:Document
{
protected override OnConnect()
{
Elements["mybutton"].OnClick+=new JsInputEventHandler(click);
//your initialization //....
}
private void click(object sender, JsInputEventArgs e)
{
Window.Alert("Click()");
}
}
Demos are quite simple, but actually I needed this library for another project.
It would be nice to have any feedback.
I have a ASP.NET MVC project and i want to use jQuery on them. as other mention I put the jQuery on head section and found that they will work in firebug.
Now I want to jQuery in my C# class. how i can use them in C# class. I want to run the code but it's never compile where I goes wrong.
public class Manager
{
public static void Test()
{
// i put here jQuery code but they never compiler i try many time.
}
}
what is the right way to use jQuery in C# class. like in javascript code is work if I write but in c# when I want to try something like ajax request.
$.ajax is work fine in javascript but when I want to run them in C# they not compile. What is the right way to send ajax request from c# class.
Please tell me the way I can use jQuery ajax function in c# class.
The main reason you can't is because jQuery is a JavaScript library, not a C# library so it just won't work. However, I'm not sure why you would want to do that.
Your C# code is running server-side, so what does an AJAX request even mean in that context? You are already running code on the server, there is no need to remotely contact the server over HTTP. Just run whatever C# code you need to get the data you want. Using AJAX would be kind of like trying to call yourself on the telephone to ask yourself something.
I think you have a fundamental misunderstanding of how the web works. Javascript (JQuery is just a Javascript library) runs in the browser. Your C# code runs on the server.
The browser makes a request for a page from the server, which is your C# code (well, your code + whatever the ASP.NET MVC framework does for you) which sends a page to the client. This page can include Javascript which the browser executes.
Your server side code doesn't run Javascript (unless you're using a Javascript based server like Node.JS instead of ASP.NET). It can output javascript for the browser to run, but it itself does not run it.
Now as far making a AJAX request from C#, if you're trying to call something on your own site #JohnFx is correct that it would be pointless because you can just call the code directly without making a request.
If you're trying to fetch data from an external site, you can make an HttpRequest from C# as shown here. There may be some wrapper code that makes it easier to work with, but I don't know any off the top of my head (it's not something that's too commonly done). You'll then need to figure out how to parse the response.
JQuery is a javascript library and therefore JQuery code cannot be put into your C# code. In order for your JQuery to run, you must output it with the rest of your html and it will run in the users browser. JQuery is javascript and cannot run on the server with your C# code.
If you'd like to make a web request to a web page from c#, similar to what happens when you do an Ajax request from jQuery, look at the HttpWebRequest and HttpWebResponse classes.
This link is also a good place to start to learn a bit more.
As the other answers point out, you simply can't execute jQuery code from c# (and you shoulnd't) since jQuery is not a technology that's meant to run inside of ASP.NET, on the server. But instead, jQuery is a library of Javascript code that makes it easier to write Javascript scripts, which execute inside the user's browser. Everything that you can do with jQuery, you can also do with pure Javascript since at the core jQuery is just a collection of javascript functions and objects.
well, the jquery is a rich javascript library and javascript is a client side language. It should be used inside the dom.
c# is server side language which is rendered on the server when the request came into server.
You need to undrstand the difference between client side and server side. here is an example article
I am trying to evaluate javascript from html page based on HTML (I mean some of the variables in javascript function are using html tag id )
I need to use it multiple threads (Not UI) so this means that i can not use WebBroser.
I can not use Eval.JScriptEvaluate because the javascript depends on the html
Is there is any way to achieve this with this limitations
Maybe there is web Service that revives html as string and lets execute some specific script.
You'll need to parse and execute the script - there's a number of projects out there to help with this see:
Are there any .NET CLR/DLR implementations of ECMAScript?
Interpreting JavaScript outside of the browser?
Can you give more detail in your question. e.g. Do you have control over this page that you are trying to run (in which case, maybe you could solve your multiple thread requirements with HTML5 webworkers) and why do you need multiple threads?
Here is one link you might find interesting which, with some work on your side would allow you to load web pages into Rhino (a server side, javascript interpreter) and execute the javascript.
Another link to check out is HTMLunit, which also allows you to simulate a browser that can execute javascript code from within Java.