DataFlex 2021 - 20.0 (Released April, 2022 - Build 220.127.116.11)
Introducing DataFlex 2021
DataFlex 2021 is the beginning of a new era for DataFlex! Even though
the main goal is to allow your applications to take advantage of both
64-bit and full Unicode support, there are revolutionary additions and
improvements in all areas of the product.
Unicode and 64-Bit
DataFlex 2021 is 64-bit capable and fully Unicode, unlocking the power
of 64-bit environments and supporting multiple languages in a single application.
We recommend that you review the information in these sections:
...and then follow the step-by-step recommendations in Working
with DataFlex 2021.
Note that Unicode support is available for all types of DataFlex Web
Applications, including ASP Classic.
In addition to the multi-national support provided through the Unicode
capabilities of DataFlex 2021, you can create mobile and web applications
that are more secure, with enhanced user interaction that is more easily
customizable, responsive and dynamically configurable through these exciting
additions and refinements in the Web Application Framework:
Web Objects are created at runtime, not hard-coded in the application.
Their definitions may come from the database, or prior user interactions,
and their use are centered around UI objects (controls). Dynamic objects
are useful for user-configurable dashboards, questionnaires,
or anywhere you can't predetermine the exact object structure.
- New cWebTagsForm
- This new control
looks like a standard web form, but it allows the selection of multiple
items. These items are visually represented by boxes/balloons called
tags. Selection is done by typing text into the form and, optionally,
a list of items to select from is displayed.
- The cWebHTMLList
class show lists of data using custom HTML formats.
- The cWebGeoLocation
class queries the current location (using GPS coordinates) by wrapping
the HTML5 navigator.geolocaton API and supports
both single query and tracking.
new layer of security checks is added that validates if UI objects
are actually displayed (pbRender, pbVisible) and enabled (pbEnabled)
before performing operations on them. This prevents unwanted exposure
of data and prevents unallowed operations from being performed. A
new web property type called ClientProtected is added to support this.
- Improved error handling on DownloadUrl
- Improved masking logic with Android support.
- The SetCookie procedure now has support for the samesite
attribute. The WebApp Framework has a new psSessionCookieSameSite
property to configure this behavior. This resolves the samesite warnings
- The psInputMode
property replaces pbHtml5NumberOnMobile and uses to determine which
keyboard is displayed on touch devices. The support for this attribute
is growing where the type=number support seems to get worse. This
new attribute is also a better fit for how the framework handles masking.
The pbHtml5NumberOnMobile property is removed and replaced with the
cWebProgressBar pbShowPercentage support in Df_Material theme
- New OnCollapse
events in cWebGroup
- New OnKey
event hook that is called for each key press in the form
- New OnInput
event hook that is called after every user change of the form value
- New pbAutoTab
support in cWebForm
for client web properties
- The framework now fundamentally uses the cWebHttpHandler
instead of cWebService, which provides more flexibility in the JSON
format and removes the need for valuetree.
- Additional client web properties of type number and date.
Special Note: Use The DataFlex Styler to easily customize the themes
used in your Web Applications. Read more about Styling
The new connectivity capabilities are at the heart of providing robust
Unicode support in your applications. DataFlex 2021 contains re-engineered
SQL drivers for Microsoft SQL Server, IBM DB2, MySQL and other back-ends
supported through ODBC.
DataFlex 2021 also includes a 64-bit version of the PSQL (Btrieve) driver.
This driver does not add any Unicode support and runs through the same
compatibility layer as the Embedded Database driver. We continue to investigate
the feasibility of adding Unicode support to the PSQL driver.
When working with various SQL back-ends, its important to understand
how each one deals with Unicode. The
Working with DataFlex 2021 section covers Microsoft SQL Server in
detail, but we've created a series of guides for other SQL environments:
As you convert your data and experiment with Unicode in your chosen
SQL environment, pay attention to these important concepts:
The updated drivers also reduce the default memory used in Web Applications.
Use in DataFlex Web Applications".
There are also many additional enhancements and fixes that create a
more seamless SQL environment:
DataFlex 2021 includes improvements to how web applications are managed
that are not specific to the Unicode and 64-bit capabilities that are
the main thrust of the new release.
- Maximum concurrent sessions limit per WebApp – developers can now
set the “Maximum
Concurrent Sessions” per web application instead of per server
- Improved automatic re-load of process pools – in prior revisions,
when the WebApp server automatically restarts an app, or the size
of the process pool is changed, all processes in the pool are stopped
and then restarted. In DataFlex 2021, the server will now stop each
process one by one, and start a new one, until the entire pool is
- Improved logic when a process is in an error state – In prior revisions,
when a WebApp process is in error state the next incoming request
is affected by this. When attaching to a process fails (can have multiple
reasons) an error is sent back to the client even though the cause
of the error usually is unrelated to the request. In DataFlex 2021,
when this happens the server will assign the call to the next process
in the pool (if available) to retry. Situations in which this can
happen are unresponsive process, connection lost and attached state
invalid. Note that this automatic assignment to the next available
process can only be done if no DataFlex code of the application has
- Run WebApps under specific user accounts – developers can now specify
which user account any web application should run under. See the screen-shot
of the updated WebApp properties panel below.
- Maximum processes per application server in SPLF configurations
– in prior revisions, the process pool settings were configured at
the SPLF server and then those were spread among the available application
servers according to the weight ratio. If an application server was
removed or failed, the processes would be redistributed over the remaining
application servers without any consideration to the load (or licensing)
on the remaining application servers. In DataFlex 2021 developers
can now set a maximum pool size for each application server (slave)
that will not be overridden by the pool settings at the web server
issue that disabling a webapp in the administrator it asked for a
the maximum number of licensed web applications for Application Servers
the maximum number of licensed Application Servers for DataFlex Web
communication between Web Servers and Application Servers regarding
updates on running & stopped processes
Studio Dark Theme
We've added a Dark Theme to the DataFlex Studio!
You can try the new theme by selecting the Dark Theme option from the
Configure Studio... option on the Tools menu.
Note that the Studio allows you to hot-switch between the Dark Them
and the standard theme, but we recommend you restart the Studio after
changing between themes.
Compiler Warning System
The Compiler Warning System
in the DataFlex 2021 Studio is more flexible and contains new warnings
for the declaration and use of ambiguous
functions. All warning categories can now be turned on and off with
command, which allows you to focus on the various categories one at a
time, or in groups. This is especially useful when you want to focus on
specific goals, like Unicode compatibility or cleaning up the use of ambiguous
functions, in your applications.
- New functions
- We have replaced
(the product that handled evaluation periods and activation) with
technology similar to the functionality we’ve used for years in DataFlex
folder selection dialog - The new cSelectFolderDialog
class can be used to display a modern folder selection dialog in windows
support for pbVisible to List and Grid columns
CurrentDateTime expression not resulting in timespan issue
documentation on Broadcast Recursive with return value
OEM to ANSI
wizard in database builder - see OEM
Data in DataFlex and Table
Character Format in DataFlex 2021 for more information
new 'Copy full file path' and 'Copy filename' options to the Studio
RunProgram argument size limitations
- Add sample for cSelectFolderDialog
in Order Entry
- Example workspaces use the latest DataFlex Reports 8 Example Library
DataFlex 2021 Update
DataFlex 2021 Final
DataFlex 2021 RC1 Release
DataFlex 2021 Beta
3 Releqse Notes
DataFlex 2021 Beta
2 / Beta 1 Release Notes
DataFlex 2021 Alpha
2 Release Notes