Get actual margins of an html element in c#

Question

I need to get the actual number of pixels that an IHTMLElements margin is taking up, in my c# code. I've looked in it's style and currentStyle members, but the relevant parts are either null or set to "auto".

Searching the internet has shown up the getCurrentStyle function in javascript, but I need these numbers in my c# code.

Obviously I'm a bit new to js and html and everything...

So, is there any way to get at the actual calculated number of pixels being used for an elements margin (or any of it's other measurements for that matter) in c# code?

I forgot to add: This will only be getting used in Internet Explorer for the foreseeable future

Answer 1

Does it have to be in the C# code? It may be easier to do this at the client through script - for example, with jQuery some combination of width(), innerWidth() and outerWidth() should return the margin.

Answer 2

Javascript Section

var elementToCalc = document.getElementById("your element");

document.getElementById('txtHidMarginTop').value = parseInt ( elementToCalc.currentStyle.marginTop );
document.getElementById('txtHidMarginLeft').value = parseInt ( elementToCalc.currentStyle.marginLeft;
document.getElementById('txtHidMarginRight').value = parseInt ( elementToCalc.currentStyle.marginRight;
document.getElementById('txtHidMarginBottom').value = parseInt ( elementToCalc.currentStyle.marginBottom );

HTML Section

<input type='hidden' id='txtHidMarginTop' runat='server' />
<input type='hidden' id='txtHidMarginLeft' runat='server' />
<input type='hidden' id='txtHidMarginBottom' runat='server' />
<input type='hidden' id='txtHidMarginRight' runat='server' />

Attach these variables to input type='hidden' elements with runat='server' and then you can access these variable in C# using the DOM elements Value property.

C# Secition

 string marginTop = int.Parse ( txtHidMarginTop.Value );
    string marginLeft = int.Parse ( txtHidMarginLeft.Value );
    string marginRight = int.Parse ( txtHidMarginRight.Value );
    string marginBottom = int.Parse ( txtHidMarginBottom.Value );

Answer 3

How about subtracting the IHTMLElement2.clientWidth from the offsetWidth?

For more details on metrics: http://msdn.microsoft.com/en-us/library/ms530302(v=vs.85).aspx