2531Custom Paging in ASPhttp://www.dotnetindex.com/read.asp?articleID=40This source code displays results dividing to pages. Code provides Next Previous page links with numeric page numbers. You may modify source code to use with MS SQL or MS Access database. For this example, we have used MS SQL Server using sample database Northwind.ASP > Tips and Tutorials > Database-relatedOct 10, 2006
Building an SQL string from optionally posted criteria is tricky. You need to check if the user posted a value since only then is the criteria included in the query. Numeric entries are different from character entries and multiple-selection fields require additional processing to produce a valid SQL query. Fields that might contain single quotes need special attention to prevent syntax errors.
code required for this page is very simple. A database connection is established and the database is queried for the record with the passed in ID. Then, the document's content-type is set to "image/gif" to let the browser know to interpret the coming data as an image. Finally, the Response.Binarywrite method is used to output the binary data from the database. Note how this is actually used in an IMG tag of an HTML page
Providing search capabilities to a db enables users to query on whichever element you target them to. However allowing users to target which portion of the db they would like to query gives extra value. In this example, utilizing our db of US States (state, statename, and capital) the user can search in any of three fields (by dropdown menu input) rather than the application targeting one specific table element. Note: The db only has 50 observations in it, so it is better to search on single or double letter combinations.
Searching a data base to display hyperlinked summaries that can be clicked on to display detail data provides an excellent way to navigate through your data. The following example will search our test input db of names from our example on Database Input and Display which contains last name (lname), first name (fname) and unique id (unique_id a counter of all names as they are added to the db). The user will can search the first or last name and click on any of the results to reveal the detail data (the unique id, which is all the data we have in this db) all in the same active server page. Note: The db on the server contains data primarily created by users of CodeAve.com, as a consequence some of the data contained in the db may be questionable.
In this step by step tutorial I will guide you to build the fastest method to display records from the database using plain ASP. The technique we are going to use is based on a simple fact that you don't have to hit database every time you want to display records. Take for example a list box which displays names of countries from the database. How many times you are going to change the countries in the database? I bet not often. So if you have to show those countries from the database then it will be better to cache these records in the memory and display them from memory every time you want to display that country list to the user.
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