Problem while I try to run Applet using Appletviewer

Question

Hi,
I have developed a simple Applet using JDeveloper 1.1, here I am
using a Dataset, a QueryDataSet and a grid.
When I run the Applet within JDeveloper it runs just fine, but
when I use the Appletviewer, the Applet starts of well but gives
the following error:
"borland.jbcl.dataset.DataSetException: Operation cannot be
performed on an open DataSet"
Please let me know what I am doing wrong.
Thanks,
Prag.
null

Answer 1

This may be a problem with JDK inconsistency problem. Make sure
your appletviewer IS Java 1.1 compliant. Also, have you properly
deployed your applet to a jar file?
Here are the instructions for deploying a database applet:
Hope this helps..
-Chris
Task 7: Deployment
The following requirements apply when deploying a database
applet:
The database must be on the same server as the Web Server (or use
a connection manager).
Must have a JDK 1.1 compatible browser, such as Netscape 4.0.4 or
Internet Explorer 4.0.
Creating the Java Archive (.jar) file
Select File|New
Click the Deployment tab
Double-click the Simple Archive Profile icon.
The Simple Archive Profile wizard (SAP wizard) is displayed.
On the Welcome page, click Next.
On page one of the SAP wizard, enter or browse to set the Archive
Path. Set the name of the jar to db_applet.jar.
Click Next.
Page two displays the names of all files in your project. Accept
the default value of deploying all of the files and click Next.
On page three, Dependencies, shift-click each item in the list
"List items that you do not want to appear in the archive to
select them all.
Click Remove.
In most cases, developers prefer to ship only their own classes
in the .jar file, with separate .jars that store common files
used by all of their Java programs. For the sake of simplicity,
you are going to create a .jar file that includes all of the
classes necessary to run your applet. By removing all of the
libraries, you indicate that no classes should be omitted from
your deployed .jar file.
Click Finish.
Deploying the applet
Using a file manager, copy the db_applet.jar file you have just
created to the Web Server.
Copy the tutorial.EmpApplet.html file to the same directory as
your .jar file.
The tutorial.EmpApplet.html file can be found in the project
directory (by default, the \myprojects directory under the
JDeveloper root directory) or you can extract the file from the
.jar using any PK-ZIP compatible file compression utility.
Using any text editor, modify the <APPLET> tag in the
tutorial.EmpApplet.html file to include an ARCHIVE tag that
references your .jar file. Your <APPLET> tag should include this
information:
<APPLET CODEBASE = "." CODE = "tutorial.EmpApplet.class"
NAME = "TestApplet" WIDTH = 400 HEIGHT = 300 HSPACE
= 0 VSPACE = 0 ALIGN = middle ARCHIVE =
"db_applet.jar">
To test the applet, open the tutorial.EmpApplet.html file through
a web server using a Java 1.1 enabled browser.
Congratulations! You have completed your first database applet.
You created a program that queries data from Oracle tables,
displays the data in data-aware controls, allows for viewing and
editing, displays status messages to a StatusBar, and includes a
NavigatorControl component.
Prag Ratra (guest) wrote:
: Hi,
: I have developed a simple Applet using JDeveloper 1.1, here I
am
: using a Dataset, a QueryDataSet and a grid.
: When I run the Applet within JDeveloper it runs just fine, but
: when I use the Appletviewer, the Applet starts of well but
gives
: the following error:
: "borland.jbcl.dataset.DataSetException: Operation cannot be
: performed on an open DataSet"
: Please let me know what I am doing wrong.
: Thanks,
: Prag.
null