01-19asp.net Foundation--Website Login and verification

The first step:

1) First Use "Codesmith" to instantiate the Examinee class and generate a method for the entity class to connect to the database, which exists under the "App_Code" folder under the solution.

Modify the connection to a database;

Private SqlConnection _conn;          Public DBConnection ()        {            = system.web.configuration.webconfigurationmanager.connectionstrings["conn" ]. ToString ();             New SqlConnection (connectionString);        }

To modify configuration information in config:

1<configuration>2 3<system.web>4<compilation debug="true"targetframework="4.5"/>5"4.5"/>6</system.web>7<connectionStrings>8<add name ="Conn"connectionstring="server=.; Database=kaoshixitong;user=sa;pwd=123"/>9</connectionStrings>Ten</configuration>

The second step: first design the Good interface:

2) write the code and implement the function.

Login Code

1  //Login Button2     protected voidButton1_Click (Objectsender, EventArgs e)3     {4         stringuser =Txt_user. Text.trim ();5         if(User = ="")6         {7Response.Write ("<font size=16> cannot be empty </font>");//output in website production is response8         }9         stringMima =Txt_mima. Text.trim ();TenExamineedata da =NewExamineeda (). Select (User,mima);//invoking a database method One         if(da!=NULL) A         { -Response.Redirect ("http://baidu.com"); -         } the         Else -         { -Label1.visible =true; -         } +         if(TextBox1.Text.Trim () = =linkbutton1.text) -         { +Response.Write ("http://baidu.com");//verify code entered correctly, jump directly to Baidu A         } at         Else -         { -Response.Write ("validation Error");//when an error is entered -         } -     } -     //Random 4-bit digital verification code in     protected voidLinkButton1_Click (Objectsender, EventArgs e) -     { toRandom Suiji =NewRandom ();//Random number +          for(inti =0; I <4; i++) -         { the             if(i = =0) *             { $Linkbutton1.text = Suiji. Next (0,Ten). ToString ();Panax Notoginseng             } -             Else the             { +Linkbutton1.text + = Suiji. Next (0,Ten). ToString (); A             } the         } +}

3):

01-19asp.net Foundation--Website Login and verification