What is viewstate and use of view state?

Answer:

Viewstate is a client side state management technique or method. View state is a temprory storage media to store any value in page level only.

Viewstate is also used to maintain state of server controls like textbox during postbacks of a page.

In view state, you can also store structured data like arraylist, dataset etc.

Example:

Lets say there is data table filled with data.

DataTable dt=new Datatable();

//fill dt with data and store it in viewstate to persist its value in page during postbacks.



//store value in view state

ViewState["MyTable"]=dt; 



//get value from view state

DataTable dt=(DataTable)ViewState["MyTable"];

string strUser=string)