In my class library i'm embedding some js and css files for use in my asp.net application, as in the method described here. Now i would to put some c# code inside js file, and let it compile in the resulting dll. Would it be possibile?
Example: somefile.js
function foo()
{
var a = "<%= SOME_CONSTANT_DECLARED_OUTSIDE %>";
<% ... some conditional code %>
}
Javascript is client SIDE and C# is server side .
You can't run C# in Javascript
ASP.NET does not compile, nor look for managed code (code that compiles, like C# code) in *.js files. SO when you put some C# code in js file, that code will not work as C# code (the client will try to use it as javascript code).
But there is a workaround - ASP.NET does render C# code in aspx files. So you can embed some C# code in JS function, as long as this function located in aspx file (inside script tags).
The documentation tells you a way how to add a variable..-
In the UpdatePanelAnimation.js you have this lines of code
BorderAnimation = function(color) {
this._color = color;
}
this is then automatically set.
Dim script As String = String.Format( _
CultureInfo.InvariantCulture, _
"Sys.Application.add_load(function(sender, args) {{var {0}_borderAnimation = new BorderAnimation('{1}');var panelElement = document.getElementById('{0}');if (args.get_isPartialLoad()) {{{0}_borderAnimation.animate(panelElement);}}}});", _
updatePanel.ClientID, _
ColorTranslator.ToHtml(BorderColor))
ScriptManager.RegisterStartupScript( _
Me, _
GetType(UpdatePanelAnimationWithClientResource), _
ClientID, _
script, _
True)
So the formatted {1} is replaced with BorderColor that you have on the server side.
You might now want to update the JS constructor like this
BorderAnimation = function(color, otherValue) { this._color = color; this._otherValue = otherValue }
now you do the same with the server side formatting but then you do
...
var {0}_borderAnimation = new BorderAnimation('{1}', '{2}')
...
this is the way how ASP.NET kind of 'connects' Backend with Frontend. There are some other ways (more elegant) to do that, but thats not the question :)
