>>Hi,
>>
>>I have been Googling on the topic of how to serialize a dataset to JSon, then store it in the local storage and then convert it back to the dataset.
>>
>>In some posts I see people use JsonConvert() and in some other cases there is a code to "manually' convert dataset to a string. Which method is more efficient, in your opinion? In one thread (on Stackoverflow) the person says that JsonConvert() stores the column name for each column and each row into a string. This seems to be a pretty big waste of storage (given that the local storage is limited).
>>What do you think?

Firstly I wouldn't try to convert a dataset to Json - use as simple a class as possible. Don't know if you are using EF - that provides an easy way for this.

WebApi automatically used NewtonSoft.Json to convert C# objects to Json if that type is requested (or set as the default type). The column name has to be repeated for each property - that's the nature of Json. In practice it's not a problem - still more compact to send over the wire than XML.

I'm routinely storing arrays of 200~ objects (each with 10-12 properties) in local storage on the browser under one key. Only problem is that if you want to modify one object you have to load them all, make the change, and re-save - but again I've not found it too process intensive.

HTH,
Viv