.net

protected void Page_Load(object sender, EventArgs e)

{

if(!IsPostBack)

{

string str = "Hello World";

if(ViewState["SampleText"]==null)

{

ViewState["SampleText"] = str;

}

}

}

protected void btnClick_Click(object sender, EventArgs e)

{

lblString.Text = ViewState["SampleText"].ToString();

View State is one of the most important and useful client side state management mechanism. It can store the page value at the time of post back (Sending and Receiving information from Server) of your page. ASP.NET pages provide the ViewState property as a built-in structure for automatically storing values between multiple requests for the same page.

Example:

If you want to add one variable in View State,

Hide Copy Code

ViewState["Var"]=Count;

For Retrieving information from View State

Hide Copy Code

string Test=ViewState["TestVal"]

 

plz refer.

http://www.codeproject.com/Articles/31344/Beginner-s-Guide-To-View-State

http://www.c-sharpcorner.com/UploadFile/225740/what-is-view-state-and-how-it-works-in-Asp-Net53

 

Life cycle:

http://www.tutorialspoint.com/asp.net/asp.net_life_cycle.htm