How to transfer values ​​between pages_html/css_WEB-ITnose

When developing web projects, you will inevitably encounter the problem of value transfer between pages. I wonder if you know how to transfer values. I only know a few: QueryString, Session, Application, and Cookie. But how to implement it specifically: Please see the detailed explanation below:

1. Use QueryString method

In this way, we can put some parameters in the address bar in the browser to Take it out. For example: string str=Request.QueryString["username"].toString();

2. Use Session method

Session is used to save each session Private information for a user. Her lifetime is the user's continuous request time plus a period of time (default is 20 minutes)

1) Save the content to the session in event 1

Session["name"] = "hello";

2) Get the saved name variable value in an event on another page

String name = Session["name"].ToString();

3. Use Application method

Application variables are valid throughout the application life cycle, similar to It's the same as using a global variable, so it can be accessed from different pages. The difference between it and Session variables is that the former is a global variable shared by all users, while the latter is a global variable unique to each user.

1) Save the content to Application in event 1

Application["name"] = "hello";

2) In Get the saved name variable value from the event on another page

                                                                                                                                                                                         🎜>

I found a small example on the Internet, as follows:

C# code of a.aspx:

1 private void Button1_Click(object sender , System.EventArgs e)

2 {

3 HttpCookie objCookie = new HttpCookie("myCookie","Hello,Cookie!");

4 Response.Cookies. Add(objCookie);

5 }

C# code in b.aspx:

1 private void Page_Load(object sender, System .EventArgs e)

2 {

3   string myName1Value;

4   myName1Value = Request.Cookies[ "myCookie" ].Value;

5 }

Summary: I only know a few methods of page value transfer for now, I hope it will help everyone understand.