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my jQuery parameter is not recognized by the C# method in which is accessed in script area

I tried to access the my C# method in my JavaScript, but this method is not accepting the local parameters and saying, the parameter does not exist in the current context.
var typeofServiceNumber = $("#serviceType").val();
#MyStaticClass.StringEncoding(Convert.ToString(typeofServiceNumber));
The above typeofServiceNumber is not recognized by the method

Razor code is executed server side before the HTML is returned in the response stream.
Javascript is executed client side within the resultant HTML.
Therefore you cannot pass a Javascript variable through to a Razor method, and you receive the message that typeOfServiceNumber is not recognized.
To be recognized, it would either need to be handled server side via data being passed to the View (ViewBag, Model etc), or it would need to be declared and assigned to within Razor tags on the page itself.
EDIT: to clarify the last point:
var typeofServiceNumber = $("#serviceType").val();
#MyStaticClass.StringEncoding(Convert.ToString(typeofServiceNumber))
The first line you have here is all happening in the browser of the end user.
The second line is all happening on the server. You see the error message because you are trying to pass "typeofServiceNumber" to your method, and the variable isn't even declared at that point.
Without knowing exactly what you're trying to achieve it's hard for me to give a precise answer as to how to solve your problem. But here are two possibilities:
1) You know what $("#serviceType").val() is going to be before you serve the web page to the end user because that value is being set server side.
Controller:
public ActionResult MysteryController()
{
...your code here to work out what the service type is...
ViewBag.serviceType = serviceType;
return View();
}
View:
...lots of lovely html and such...
<script>
#MyStaticClass.StringEncoding(Convert.ToString(ViewBag["serviceType"]));
</script>
I can't see what the output of #MyStaticClass.StringEncoding() is but I have to assume at this point that it is doing whatever it is supposed to do.
Although the logic is split between the controller and the view, all of this is happening server side.
The second half of my point "or it would need to be declared and assigned to within Razor tags on the page itself." refers to the fact that one variation of this method could involve manipulating data in the View itself by enclosing it in a Razor code block like this:
#{
var typeofServiceNumber = #MyStaticClass.StringEncoding(Convert.ToString(ViewBag["serviceType"]));
}
The alternative, which I did not really address originally is:
2) You don't know what the value of $("#serviceType").val() is going to be before the page is loaded because it is being set by the end user and your function needs to be used before the data is submitted to the server:
If that's the case then #MyStaticClass.StringEncoding(Convert.ToString(typeofServiceNumber)) is no good to you, you will have to replicate the function in JavaScript and include it in the webpage itself.

Calling controller function from gsp

I need to call a controller function from javascript on my gsp.
I have read different solutions from hundreds of places but none worked.
The problem which I found closest to mine was this.
But I am not repeating the same mistake as this and thus the solution didn't help.
I have a tag like this which calls the javascript function
<g:select name="poNumber" noSelection="['':'Select PO Number']" from="${com.rerq.PurchaseOrder.list()}"
onchange="getProject(this.value)" />
And the javascript function looks like this
function getProject(poNumber){
var projectName = document.getElementById("projectName");
var newData = ${remoteFunction(controller: 'sow', action: 'getProject', params: ['poNumber':poNumber])};
}
And the function I need to call is
def getProject(String poNumber) {
String projectName = Sow.find("from Sow as s where s.poNumber=?", [poNumber])
return projectName
}
The controller function might have mistakes as I am completely new to groovy and grails. But my understanding is that the control isn't reaching here so this should not be the cause of any problem.
I am getting below exception
No signature of method: remoteFunction() is applicable for argument types: (java.util.LinkedHashMap) values: [[controller:sow, action:getProject, params:[poNumber:null]]]
I tried using remoteFunction() in g:select itself but it threw another exception which said
Attribute value quotes not closed ...
even though they were.
Any help is greatly appreciated.

To use remoteFunction with Grails 3 you need to add the ajax-tags plugin: org.grails.plugins:ajax-tags:1.0.0

Actually you can have your gsp recognize some Grails functions inside your js if the script is inside the gsp and anything you need for your js is created on the server side. In your case it seems you want to do an ajax call so you could have the following.
project.gsp (Consider that you already loaded jQuery)
<g:select name="poNumber" noSelection="['':'Select PO Number']" from="${com.impetus.rerq.PurchaseOrder.list()}"
onchange="getProject(this.value)" />
And in the same file you have
<script type="text/javascript">
function getProject(poNumber){
jQuery("#yourTarget").load("${createLink(action: 'getProject')}",{poNumber: poNUmber},function(response, status, xhr ){
if ( status == "error" ) {
alert("No data loaded.")
}
});
}
</script>
As you see a gstring in load("${}",... is used because it will be parsed in the server and at client side your actual js it will parse to load("yourcontrollerName/getProject",..... Why not code the url directly in the js? Because by using createLink() it is less likely to make reference mistakes.
EDIT
If you want to do this but using an external js file, you would need a way to pass the url, to the js, and use a simple load function. So something like this will be helpful
<g:select name="poNumber" noSelection="['':'Select PO Number']" from="${com.impetus.rerq.PurchaseOrder.list()}"
onchange="getProject(this.value, \'${createLink(action:'getProject')}\')" />
Once on the server onchange="getProject(this.value,\'${createLink(action:'getProject')}\')"would be parsed to onchange="getProject(this.value,'yourController/getProject')". Be wary that I might have messed up the ""s and ''s so verify your html output.
And you would need a js function that accepts the uri
function getProject(value, targetUri){
....
}
What you need to review is when is your function needed, on the server o in the client;if the functions are inside a gsp or not; And if not available, how could you pass data to them.

You cannot access grails's controller from javascript. I haven't tested it but this might work.
<g:createLink controller="sow" action="getProject", params="['poNumber':poNumber]"/>
Also, if you use Google Chrome's developer's tool, you will see how your javascript code is displayed. Make sure it is in right syntax.

PHP logic to Javascript front into html tags

I am currently trying to convert a lot of backend code to front end (to lighten the load on a small system).
The code at the moment calls a PHP function to return specific information. (e.g. image locations, strings, styling)
I am converting this code to its js equivalent, the content from Mysql was converted to JSON and stored in a read only file and I am accessing that file using this code:
<script>
function jsread(tag) {
$.getJSON("/strings.json", function(result){
document.write(result[tag]['value']);
});
}
</script>
I want the function to "print" where ever it is invoked. document write writes the value to the page but stops all other loading and write only the value.
Let me be very clear on this: I DO NOT want to use anything that needs extra calls or references out side of this function, that will take months of work so no getting elements by their IDs I have already view many questions on this subject and none are what I can work with. I need something that can be applied to every situation. Other wise I will just have to read the JSON using PHP as a middle compromise.

The problem here is, document.write()'s behaviour is crazy across all the browsers, because, it directly modifies the document object and messes up with the events attached. So it is always better to avoid this function as each browser defines it differently and has a different effect on the same code, with different browsers.
Is there a way to use them without a direct reference?
Solution
The wise thing is, as I said in the comments, it is better to use one of the jQuery functions safely, which create a textNode and insert it the right way, without affecting the others:
<script>
function jsread(tag) {
$.getJSON("/strings.json", function(result){
$("body").append(result[tag]['value']);
});
}
</script>
In case, if you wanna do something like having a placeholder and doing stuff, then you can try giving something like this:
$(function () {
var data = "Dummy Data, that would probably get returned from the getJSON";
// Inside the Success function, do this:
$("span.placeholder-of-the-json").replaceWith(data);
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<span class="placeholder-of-the-json">This gets replaced</span>

redcarpet markdown - execute javascript code

I am created documentation using tripit/slate. All documentation content is in .md file. slate is using redcarpet markdown engine. Now when I put <script> tag as below in markdown:
```
<script>document.write(window._restapiurl);</script>
```
it will be converted to <script>document.write(window._restapiurl);</script> in html. And the statement is in <pre> tag so will render as <script>document.write(window._restapiurl);</script> on page. The statement prints the path of an api endpoint.
I want to execute this statement on a page which means the statement should print the value of a varible window._restapiurl. If I manually write the <script> tag in html after page build, the statement will be executed and print the value of a variable.
Update:
tried with :escape_html => true, :filter_html => true in config.rb but it didn't work.
more update
I need to execute javascript statement in my language selector curl tab.
more update
Even If I remove triple ticks ```, the script tag does not execute. It just prints the script statement on a page.
How do I execute javascript code written in markdown ??? So that I don't need to update the api endpoint path whenever new version is released and I can manage it by changing the value of variable only.

In md file I've replaced
```
url of api endpoint
```
with below code
<pre>
<script>document.write(window._restapiurl);</script>
</pre>
This will execute javascript statement in darkbox of tripit/slate documenation format.

Do you really need to put this inside a code block ? If no, just put the script tag inside your Markdown file (or even, FWIW, write <pre><code> yourself). Otherwise, you can't easily do that. The fact is that by default, Redcarpet's HTML render object will escape any HTML tag inside code blocks. Your only option is to implement a custom render object. You can rely on the fact that the code yielded to the block_code method isn't HTML-escaped:
class CustomRender < Redcarpet::Render::HTML
def block_code(code, lang)
"<pre>" \
"<code class=\"#{lang}\">#{code}</code>" \
"</pre>"
end
end
And then pass this object to your Redcarpet::Markdown instance:
Redcarpet::Markdown.new(CustomRender, fenced_code_blocks: true)
Moreover, you're maybe doing it wrong. If it's just about inserting some special values inside your code snippets, then you may want to use a special syntax inside your snippets and replace it with your very own values. You can do that inside a custom render object again, using String#gsub or String#% on the given code variable.
Have a nice day!

How to get texts from Resx to be used in Javascript?

We are building large ASP.NET applications for the intranet use in multiple languages/cultures. We utilize the Globalization with RESX files and use GetResourceText on the server side to get the localized texts.
Lately we are doing more and more client side logic with JQuery.
How do I get the RESX texts to be used in Javascript?
e.g. texts used for validation, dynamic messages etc.
All our Javascripts are in .JS files, we do not want to mix HTML in the ASPX page and Javascript blocks.
Thanks for your help.

Unfortunately, in an external JS file the server side code is not being processed by the server. However I have seen a workaround where you can set your translated values in hidden fields on the page - this way your javascript will be able to read the values in.
For example:
<%-- This goes into your page --%>
<input type="hidden" id="translatedField" name="translatedField" value="<%=Resources.Resources.translatedText %>" />
and use this inside your javascript file:
// This is the js file
$(document).ready(function() {
alert($("#translatedField").attr("value"));
});
You will be able to separate the values and still see it in your external JS file.
There is also another workaround that creates a .aspx file that only outputs Javascript instead of HTML. Check out the link below:
Using server side method in an external JavaScript file

Always separate functionality from human readable strings.
If you're creating jQuery-plugins you should be able to pass an array of localized strings as parameter when you call your different jQuery functions. The array could be defined as inline javascript directly on the page calling the different jQuery plugins or you could load the from external resource in the format /scripts/localization/strings.js?ci=en-US and register a Generic ASP.Net Handler in web.config that would respond to scripts/localization/strings.js
The DatePicker control is a fine example of how to localize text for the jQuery datepick control - this js file is dynamically created from resource files (resx) and when included on a page it will make sure the calendar control will have danish text.

Create a HttpHandler (.ashx file), and return JSON with your text resource strings.
You may also "publish" it to global namespace, i.e.
Response.Write("window.Resources=");
Response.Write((new JavaScriptSerializer()).Serialize(strings));
set up HTML like:
<script src="Resx.ashx?lang=en-US" />
<button class="LogoutButtonResourceId OtherButtonClasses">(generic logout text)</button>
<a href="#"><span class="SomeLinkTextResourceId OtherClasses">
(generic link text)
</span></a>
and apply texts like this:
$(document).ready(function() {
for(var resId in Resources){
$("."+resId).html(Resources[resId]);
}
});

If you don't want to use ASP.NET to generate your main JavaScript, here are two other options:
Use ASP.NET to generate a script file that contains variable-to-string assignments, such as var mystring = 'my value';. Your main script would then reference the localized text with variables names rather than as embedded values. If that's still too "dirty" for you, you could encode the strings as JSON rather than as variable assignments, using an HttpHandler rather than straight .aspx.
Have your JavaScript code issue an Ajax call to retrieve an array or list of localized strings from the server. The server-side part of the call would retrieve the text from your resx files.

Have you considered using $.ajax in combination with ASP.NET WebMethods? It's hard to suggest a more concrete solution to this problem without understanding how your JavaScript/jQuery would consume/process the resources. I assume that they're organized into logical groups (or could be) where you could return several resource strings that belong on a single page.
Assuming that, you could write a very simple C# class -- or use a Dictionary<string, string> -- to return data from your ASP.NET WebMethod. The results would look something like:
[WebMethod]
public Dictionary<string, string> GetPageResources(string currentPage)
{
// ... Organizational stuff goes here.
}
I always separate out my AJAX calls into separate .js files/objects; that would look like:
function GetPageResources (page, callback)
$.ajax({ // Setup the AJAX call to your WebMethod
data: "{ 'currentPage':'" + page + "' }",
url: /Ajax/Resources.asmx/GetPageResources, // Or similar.
success: function (result) { // To be replaced with .done in jQuery 1.8
callback(result.d);
}
});
Then, in the .js executed on the page, you should be able to consume that data like:
// Whatever first executes when you load a page and its JS files
// -- I assume that you aren't using something like $(document).ready(function () {});
GetPageResources(document.location, SetPageResources);
function SetPageResources(resources) {
for (currentResource in resources) {
$("#" + currentResource.Key).html(currentResource.Value);
}
}

I know it's to late but want share my experience in this task)
I use AjaxMin. It can insert resx key values into js file on build event.
It's not common way but it keeps html without unneeded script blocks and can be done during minification process if you have it.
It works like this:
ajaxmin.exe test.js -RES:Strings resource.resx -o test.min.js
Also you need to do the same for ech locale if you have many.
Syntax to write resource keys in js (and also css) is written here:
Js localization
Css localization

How about injecting it as part of a javascript control initialization? what i do is as follows:
I have a self-contained javascript control - call it CRMControl, which has an init method called setupCRMControl, to which i pass a settings object. When i initialize it, i pass an object containing all the resources i need inside javascript as follows:
CRMControl.setupCRMControl({
numOfCRMs: 3,
maxNumOfItems: 10,
// then i pass a resources object with the strings i need inside
Resources: {
Cancel: '#Resources.Cancel',
Done: '#Resources.Done',
Title: '#Resources.Title'
}
});
Then, inside this javascript control:
var crmSettings = {};
this.setupCRMControl(settings) {
crmSettings = settings;
};
and whenever i want to show a resource, i say (for example, show an alert saying 'Done'):
alert(crmSettings.Resources.Done);
You can call it "R" to make it shorter or something, but this is my approach. Maybe this may not work if you have a whole bunch of strings, but for manageable cases, this may work.