(In Web Matrix, Intelli Sense can help you learn figure out the name, type, and order of the parameters.) As an alternative to passing values in order, you can use Named parameters are handy for a couple of situations, especially when a method takes many parameters.
When you submit the changes, the code in the page updates the database and takes you back to the movie listing. While each grid row is being constructed, the operator in the previous tutorial; it's an ASP.
This part of the process works almost exactly like the page you created in the previous tutorial, so much of this tutorial will be familiar. NET operator that represents the current website root.) The result is that this part of the markup in the column simply produces something like the following markup at run time: will be different for each row. The three columns you originally had in the grid displayed only data values (title, genre, and year).
Joomla can use different kinds of SQL database systems and run in a variety of environments with different table-prefixes.
In addition to these functions, the class automatically creates the database connection.
As we've mentioned throughout this course, there are many times we might find ourselves using SQL or a SQL-like query language on a database.
We can think of some uses as "read-only operations" and other uses as "read/write operations".The SQL problems studied in the posts on this site can become a serious trouble when updating a database; I mean update in terms of insert, delete and update as such a database.There are several possibilities in technology at the time of updating a database, for example, we have the case of input data to an information system, when we are migrating a database to a new one that usually has a different structure, in the case of updating a distributed databases that are spread in different locations, when we are loading data to a Data Mart, and a number of other possibilities, in all of them we must be aware of the danger of inserting data into a database when we don’t know the weaknesses of SQL.Besides instantiating the object you need just two lines of code to get a result from the database in a variety of formats.Using the Joomla database layer ensures a maximum of compatibility and flexibility for your extension.For , if you mixed up the order of the values you pass, you'd get an error message when the page runs, or at least some strange results.