Using directive missing

Question

I'm new using Sharepoint and I have a question. When I try to use this code:

var ctx = SP.ClientContext.get_current();
var items = SP.ListOperation.Selection.getSelectedItems(ctx);
var myItems = '';
var i;

for (i in items)
{
myItems += '|' + items[i].id;
}

Get this:

the type or namespace ClientContext name does not exist in the namespace (are you missing an assembly reference)

Which reference or using sentence am I missing? Even when I type the SP and dot, there is nothing there that allows me to select a method or something. I use Visual Studio 2013 professional and SharePoint 2010. Thanks

Answer 1

The code snippet above is JavaScript code, you seem to need C# code. That's the root of your issues.

Search for CSOM examples instead of JSOM / JavaScript samples and you should be of to a good start