Random Notes and simple code on Developing Web Sites (Applications) in ASP.net using C#
- The information below primarily apply to the web page model of web-development in C#
- _PageStart.cshtml runs at each page start/open
- _AppStart.cshtml runs at the beginning of the application
- Syntax to use the Layout file: @{Layout = “/Shared/Layout.cshtml”;}
- if you use this – @{Layout = /Shared/Layout.cshtml”;} in the _PageStart.cshtml file, you will not need to use it at the top of each file
- You can use Microsoft Webmatrix, Visual Web Developer, or Visual Studio for web development
- Webmatrix, includes IIS Express, and also a database workspace where you can create and use compact SQL Server Databases
- DateTime.Now : will display current date and time
- You can connect to a database using var db = Database.Open(“db_name”);
- db = Database.Open(“db_name”); will look for the database in the same workspace; if not found will use the connection parameter as defined in the web.config file to find and connect to database
- Executing a query: var queryString = “SELECT * FROM Product ORDER BY Name”; db.Query(queryString)
- Accessing each row from a rowset of data as returned from database:
foreach(var entry in db.Query((queryString))){ @entry.Id, @entry.Name } - if (IsPost) : will check if a form is submitted by POST or not
- username = Request.Form[“username”]; Will retrieve username from the Request object [submitted form with control named username]
- A basic login authentication code can be as follows
var username = ""; var password = ""; var ErrorMessage = ""; // If this is a POST request, validate and process data if (IsPost){ username = Request.Form["username"]; password = Request.Form["password"]; if (username.IsEmpty() || password.IsEmpty()){ ErrorMessage = "You must specify a username and password."; }else{ // Login, Navigate back to the homepage and exit if (WebSecurity.Login(username, password, false)){ Response.Redirect("~/"); } else{ ErrorMessage = "Login failed"; } } } @if (ErrorMessage!="") { @ErrorMessage, Please correct the errors and try again. } - Execute an Insert Statement: db.Execute(“INSERT INTO UserProfile (Email) VALUES (@0)”, email);
- WebSecurity object can be used for the security of your web-site (application) such as user authentication, block a page until a user is authenticated
- Block user if he is not logged in [can be added at the top of the page to be blocked]
@{ if (!WebSecurity.IsAuthenticated) Response.Redirect("~/Login"); //redirect to login page } - WebSecurity.InitializeDatabaseConnection(“db_name”, “profile_of_the_users_table”, “UserId”, “Email”, true);
- WebSecurity.CreateAccount(email, password, false);
From: http://sitestree.com/?p=5298
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Post Data:2012-01-30 09:33:18
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