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ChemOffice.Com - CambridgeSoft

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Administrator<br />

The following table shows how the type of user<br />

affects the other users in the group.<br />

User type<br />

Multiple readers in<br />

read-only access<br />

Multiple writers in<br />

normal access<br />

One writer,<br />

multiple readers<br />

Affect on other users<br />

User actions do not affect each<br />

other.<br />

All users can read and write. A<br />

user may see another user’s edits.<br />

If two users try to edit the same<br />

area at the same time, one is<br />

alerted that the database is<br />

temporarily locked.<br />

The writer, in normal access, is not<br />

affected by the readers. The<br />

readers, in read-only access, may<br />

see the writer’s edits.<br />

If two people are viewing the same record within a<br />

database, and one person changes the data in that<br />

record, the second person will not see the changes<br />

immediately. The changes will be visible when the<br />

second user switches to another record, and then<br />

back to it.<br />

• Microsoft Jet Relational Database<br />

Engine—the database engine that underlies<br />

Microsoft Access enforces security. The user<br />

names and passwords are stored in an MS<br />

Access Workgroup Administrator database.<br />

For more information on Form access, see<br />

“Securing Forms” on page 271. For more<br />

information on MS Access security, see “Opening a<br />

Secured MS Access Database” on page 253.<br />

When you open a form or database that has security<br />

options applied to it, you are prompted to enter a<br />

username and password to log on.<br />

When you open a secured MS Access database<br />

from within ChemFinder, a username, password,<br />

and workgroup information file is required. Contact<br />

your Access Database Administrator for this<br />

information.<br />

To open a secured form:<br />

1. In the Validate Form Security dialog box, type<br />

your username and password, and then click<br />

OK.<br />

Secured Access<br />

ChemFinder supports the following types of<br />

security:<br />

• Form access—ChemFinder enforces form<br />

access security by requiring a user name and<br />

password, which are stored in the form (.cfw)<br />

file.<br />

• Molecule file access—ChemFinder enforces<br />

molecule file access security by requiring a user<br />

name and password, which are stored in the<br />

database’s .mst file.<br />

If the form you access includes a secured<br />

molecule database, the Database Logon dialog<br />

box appears.<br />

284•Working with Data<br />

<strong>CambridgeSoft</strong><br />

Opening Databases

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