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Overview ,[object Object],[object Object],[object Object]

Lesson: State Management ,[object Object],[object Object],[object Object],[object Object],[object Object]

What is State Management? First Name Last Name Please enter your logon information: John Submit Chen Web Server Login.aspx Login.aspx Web Server Hello John Chen Greetings.aspx Please enter your logon information: John Submit Chen Hello Greetings.aspx I forget who you are!! First Name Last Name Without State Management With State Management

Types of State Management ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Client-Side State Management Server-Side State Management

Server-Side State Management ,[object Object],[object Object],[object Object],[object Object],[object Object],Web Server Client Computer Application and Session variables SessionID

Client-Side State Management ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Web Server Client Computer Cookies

The Global.asax File ,[object Object],[object Object],[object Object],[object Object]

The Global.asax File ( continued ) ASP.NET Web Server Client ASP.NET HTTP Runtime IIS Application_BeginRequest Application_AuthenticateRequest Application_AuthorizeRequest Application_ResolveRequestCache Application_AquireRequestState Application_PreRequestHandlerExecute Application_EndRequest Application_UpdateRequestCache Application_ReleaseRequestState Application_PostRequestHandlerExecute Page execution Request Response

Lesson: Application and Session Variables ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Initializing Application and Session Variables ,[object Object],[object Object],[object Object],Sub Application_Start(s As Object,e As EventArgs) Application("NumberofVisitors") = 0 End Sub protected void Application_Start(Object sender,EventArgs e) { Application["NumberofVisitors"] = 0; }

Using Application and Session Variables ,[object Object],[object Object],Session("BackColor") = "blue" Application.Lock() Application("NumberOfVisitors") += 1 Application.UnLock() strBgColor = Session("BackColor") lblNbVisitor.Text = Application("NumberOfVisitors") Session["BackColor"] = "blue"; Application.Lock(); Application["NumberOfVisitors"] = (int)Application["NumberOfVisitors"] + 1; Application.UnLock(); strBgColor = (string)Session["BackColor"]; lblNbVisitor.Text = Application["NumberOfVisitors"].ToString();

Demonstration: Using Session Variables ,[object Object],[object Object],[object Object],[object Object]

Application and Session Variable Duration ,[object Object],[object Object],[object Object],[object Object],<configuration> <system.web> <sessionState timeout="10" /> </system.web> </configuration>

Scalable Storage of Application and Session Variables ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],SQL Session and Application variables Client Web farm Session and Application variables -Or- State server

Saving Application and Session Variables in a Database ,[object Object],[object Object],[object Object],[object Object],<sessionState mode="SQLServer" sqlConnectionString="data source= SQLServerName ; Integrated security=true" /> c:gt; OSQL –S SQLServerName –E <InstallSqlState.sql 1 2

Lesson: Cookies and Cookieless Sessions ,[object Object],[object Object],[object Object],[object Object],[object Object]

Using Cookies to Store Session Data ,[object Object],[object Object],HttpCookie objCookie = new HttpCookie("myCookie"); DateTime now = DateTime.Now; objCookie.Values.Add("Time", now.ToString()); objCookie.Values.Add("ForeColor", "White"); objCookie.Values.Add("BackColor", "Blue"); Response.Cookies.Add(objCookie); HttpCookie objCookie = new HttpCookie("myCookie"); DateTime now = DateTime.Now; objCookie.Values.Add("Time", now.ToString()); objCookie.Values.Add("ForeColor", "White"); objCookie.Values.Add("BackColor", "Blue"); objCookie.Expires = now.AddHours(1); Response.Cookies.Add(objCookie); To create a persistent cookie, specify the expiration time Set-Cookie: Username=John+Chen; path=/; domain=microsoft.com; Expires=Tuesday, 01-Feb-05 00.00.01 GMT

Instructor-Led Practice: Using Variables and Cookies ,[object Object],[object Object],[object Object]

Retrieving Information from a Cookie ,[object Object],[object Object],lblTime.Text = objCookie.Values("Time") lblTime.ForeColor = System.Drawing.Color.FromName _ (objCookie.Values("ForeColor")) lblTime.BackColor = System.Drawing.Color.FromName _ (objCookie.Values("BackColor")) Dim objCookie As HttpCookie = Request.Cookies("myCookie") HttpCookie objCookie = Request.Cookies["myCookie"]; lblTime.Text = objCookie.Values["Time"]; lblTime.ForeColor = System.Drawing.Color.FromName (objCookie.Values["ForeColor"]); lblTime.BackColor = System.Drawing.Color.FromName (objCookie.Values["BackColor"]);

Using Cookieless Sessions ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],http://server/(h44a1e55c0breu552yrecobl)/page.aspx

Setting Up Cookieless Sessions ,[object Object],[object Object],<sessionState cookieless="true" />

Review ,[object Object],[object Object],[object Object]

Lab 15: Storing Application and Session Data Medical Medical.aspx Benefits Home Page Default.aspx Life Insurance Life.aspx Retirement Retirement.aspx Dental Dental.aspx Dentists Doctors Doctors.aspx Doctors Logon Page Login.aspx Registration Register.aspx Coho Winery Prospectus Prospectus.aspx XML Web Service dentalService1.asmx Page Header Header.ascx ASPState tempdb Lab Web Application User Control namedate.ascx Menu Component Class1.vb or Class1.cs XML Files Web. config

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