FormData simple overviewthe most simple way to define it is, as simple as that, do a full postback without a postback, just with ajax.
usually you'll need it in 2 scenarios - (a) uploading file/s, maybe with other properties. (b) security won't let you do JSON.
so what i made for you?
1. Detailed simple explanation about the examples in developer.mozilla.org docs, its a bit hard to get examples.
2. Detailed simple explanation and example about how to make it more JQuery and generic
3. Simple explanation and example about how to use it with a C# handler