A recordset can also include all the records and columns of a database table. However, because applications rarely need to use every piece of data in a database, you should strive to make your recordsets as small as possible.
Because the web server temporarily holds the recordset in memory, using a smaller recordset uses less memory, and can potentially improve server performance.
However, if you want to create complex SQL queries, a basic knowledge of this language lets you create more advanced queries, and provides you with greater flexibility in designing dynamic pages.
Before you define a recordset for use with Dreamweaver, you must create a connection to a database and—if no data exists yet—enter data into the database. If you have not yet defined a database connection for your site, refer to the database connection chapter for the server technology you are developing for, and follow the instructions on creating a database connection.
URL parameters store retrieved information input by users. The information is appended to the URL of the requested page and communicated to the server. When using URL variables, the query string contains one or more name-value pairs that are associated with the form fields.
These name-value pairs are appended to the URL. Form parameters store retrieved information that is included in the HTTP request for a web page. If you create a form that uses the POST method, the data submitted by the form is passed to the server.
Before you begin, make sure you pass a form parameter to the server. The server creates a different session object for each user and maintains it for a set period of time or until the object is explicitly terminated.
Before defining session variables for a page, you must create them in the source code. This allows the user to see only the types of content they have selected as they navigate through the site. This also frees server memory and processing resources if the user forgets to log off a website. Session variables store information for the life of the use session. While it exists, the session is specific to an individual user, and every user has a separate session.
Use session variables to store information that every page in a web application can access. Another common use of session variables is to keep a running tally, such as the number of questions answered correctly so far in an online quiz, or the products the user selected so far from an online catalog.
Before creating a session variable, you must first obtain the information you want to store, and then send it to the server for storage. A typical example of storing URL parameters in session variables is a product catalog that uses hard-coded URL parameters created using a link to send product information back to the server to be stored in a session variable. Better ask your own question separately.
Add a comment. Active Oldest Votes. NET than using some form of Visual Studio! Oh, emacs and vim guys are coming The benefits are numerous: Intellisense - where any object, property, method, etc.
John Rasch John Rasch You may find that abandoning a design tool like dreamweaver actually makes you a better designer; and just as well - the "design" tools in Visual Studio are absolutely useless : If you do decide to continue using Dreamweaver for markup, be aware that things may render differently in Visual Studio. Bayard Randel Bayard Randel 9, 2 2 gold badges 39 39 silver badges 46 46 bronze badges. Eric Petroelje Eric Petroelje Adam Adam 4 4 gold badges 10 10 silver badges 21 21 bronze badges.
You will find building ASP. Net without a purpose-build IDE painful. Joel Coehoorn Joel Coehoorn k gold badges silver badges bronze badges. Ted Ted 9. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. Podcast Making Agile work for data science. Stack Gives Back The JavaScript code performs a specific task in response to an event when the document is viewed in a browser.
The server-side code performs tasks on the server when the document is viewed in a browser. Components is the term that Dreamweaver uses for some of the more popular and modern encapsulation strategies such as ColdFusion components CFCs. Server model extensions are needed only for custom server solutions, different languages, or a customized server. You can also extend the following elements of Dreamweaver to expand its capabilities or tailor it to your needs.
For more information, see Extensible document types in Dreamweaver. You can create additional code snippet files and install them into the Snippets folder to make them available. If one of the strings in the menu matches the string that you started to type, you can select it to insert it in place of the string that you are typing.
Code hints menus are defined in the codehints. You can add new Dreamweaver menus for your extensions by adding the menu tags for them to the menus. The table lists the sizes for your fields. In this example, 50 is the size. You can also find the size in your database application. Type in database. For more information on the type and size of SQL variables, see www.
Dreamweaver inserts ASP code in your page that, when run on the server, creates a command that inserts, updates, or deletes records in the database. By default, the code sets the Prepared property of the Command object to true , which makes the application server reuse a single compiled version of the object every time the command is run. To change this setting, switch to Code view and change the Prepared property to false. Although you can use server behaviors to build pages that modify databases, you can also use database manipulation objects such as stored procedures or ASP command objects to build the pages.
A stored procedure is a reusable database item that performs some operation on the database. A stored procedure contains SQL code that can, among other things, insert, update, or delete records.
Stored procedures can also alter the structure of the database itself. For example, you can use a stored procedure to add a table column or even delete a table.
A stored procedure can also call another stored procedure, as well as accept input parameters and return multiple values to the calling procedure in the form of output parameters. A stored procedure is reusable in the sense that you can reuse a single compiled version of the procedure to execute a database operation a number of times.
If you know a database task will be executed more than a few times—or the same task will be executed by different applications—using a stored procedure to execute that task can make database operations more efficient. You can use a stored procedure to modify a database. Before you use a stored procedure to modify a database, make sure the stored procedure contains SQL that modifies the database in some way.
To create and store one in your database, consult your database documentation and a good Transact-SQL manual. The Edit Stored Procedure Variable dialog box appears. The name of the variable you are editing appears in the Name box. Note: You must enter test values for any stored procedure input parameters.
A stored procedure might have input values, output values, or both input and output values. Enter a return variable, a run-time value, and a test value.
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