SharePoint is full of undocumented and largely unknown hints and tricks you can leverage when you build solutions. Often when I am F12-ing through a site, I come across these little gems and do my best to remember them for future reference.
One such bit that has proven itself useful to me a couple of times is the IID attribute, found on every tr element in every SharePoint List View.
As you can see, the iid attribute is composed of three comma-separated values. Here’s my best swag as to what these mean:
• Context ID. This is the value of the ctx.ctxId variable in the SharePoint-generated JavaScript included with the List View Web Part.
• Item ID. This is the list item’s ID.
• objectType. This corresponds to the FSObjType, meaning its value will be zero for a list item and one for a folder.
The Item ID is the important value here, at least in my case. I was looking for a way to fetch the ID of the currently selected list item, and the iid attribute, along with the CSS class of s4-itm-selected, gave me what I was looking for. By doing a JavaScript split in the iid attribute and taking the second element of the returned array, I was able to get that ID.
So the jQuery for getting the currently selected list item’s ID is:
var id = $(“tr.s4-itm-selected”).attr(“iid”).split(“,”)[1];
I had to incorporate some checks to make sure there was only one item selected, but this is the jist of the code.
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