Learn Microsoft Access Advanced Programming Techniques, Tips and Tricks.

modifying data

Modifying Data

Modifying data is a bit more complicated because the script must make certain that the appropriate record is in fact available, in other words that it exists and is not locked by a security setting or other transaction. So this example uses three scripts. The first, amend_select.asp, generates an HTML form listing the available categories from the Categories table. It passes your selection to the second, amend_change.asp, which creates a new form displaying the selected record's current values as editable fields. Those are submitted to the third script, amend.asp, which updates the actual database record accordingly with the new values.

To try these scripts out, install the files and call up the following URL:http://localhost/sample/amend_select.asp

It should display a simple drop-down control, a <select></select> element named ProdCats with an <option></option> for each CategoryName in the categories table. Select a category and click the Submit button.

This will execute amend_change.asp, which uses the submitted ProdCats to build a SQL query and generate a new form with the appropriate record's CategoryID, CategoryName and Description values. Modify the name and description and click Change to send the new values to amend.asp. That script will construct and execute a SQL UPDATE statement from the new values. If successful, it returns the confirmation message: You have successfully amended a record.

Opening the Categories table in access should reveal your changes.

Note that the second template, amend_change.asp, puts the CategoryID in a hidden input named txtID. We need to pass the CategoryID value to amend.asp in order to uniquely identify the record, but because it is an AutoNumber field, we don't want the user to modify it. By using a hidden input, the field is passed along, but the user never sees or changes it. This is the standard way to include a record's unique, automatically generated identifier in an HTML form.

Click Next for Deleting-data


  1. Installing the Personal Web Server (PWS)
  2. or Internet Information Services (IIS)
  3. Create the Example ASP Files
  4. Create a DSN Connection
  5. Connect to the Database
  6. Modify Access Data Online
  7. Inserting Data
  8. Modifying Data
  9. Deleting Data
  10. Data Insert Form
Share:

No comments:

Post a Comment

Comments subject to moderation before publishing.


Translate



PageRank
Subscribe in a reader
Your email address:

Delivered by FeedBurner

Search

Popular Posts

Blog Archive

Powered by Blogger.

Follow by Email

Labels

Forms Functions How Tos MS-Access Security Reports Class Module msaccess forms Animations msaccess animation Utilities msaccess controls Access and Internet MS-Access Scurity MS-Access and Internet Array External Links Queries msaccess reports Downloads msaccess tips Accesstips Objects Collection Object Property Event Menus and Toolbars Controls MsaccessLinks Process Controls WithEvents Art Work VBA msaccess How Tos Combo Boxes Dictionary Object Graph Charts List Boxes Query msaccessQuery Calculation Command Buttons Form Report Command Button Data Emails and Alerts RaiseEvent Custom Functions Custom Wizards DOS Commands Data Type Object Reference ms-access functions msaccess functions msaccess graphs msaccess reporttricks Item Key msaccessprocess security advanced Access Security Add Auto-Number Field Type Fields Form Instances Macros Menus Recordset SubForm Top Values Variables msaccess email msaccess menus progressmeter Access2007 Copy Excel Expression Join Methods Microsoft Numbering System Records Security Split Table Time Difference Utility Workgroup Wrapper Classes database function ms-access msaccess wizards reference text tutorial vba code Access Emails and Alerts Access Fields Access How Tos Access Mail Merge Access2003 Accounting Year Action Animation Attachment Binary Numbers Bookmarks Budgeting ChDir Color Palette Conditional Formatting Data Filtering Database Records Defining Pages Diagram Disk Dynamic Lookup Error Handler Export External Filter Formatting Groups Hexadecimal Numbers Import Labels List Logo Macro Mail Merge Main Form Memo Monitoring Octal Numbers Operating System Paste Primary-Key Product Rank Reading Remove Rich Text Sequence SetFocus Summary Tab-Page Tables Union Query User Users Water-Mark Word automatically commands hyperlinks iSeries Date iif msaccess msaccess alerts pdf files restore switch toolbar updating upload