Trace (Function)

WINDEV, WEBDEV AND WINDEV MOBILE
ONLINE HELP

Version:

Home | Sign in | English

Functions for Windows management

Various WINDEV functions

Trace

Presentation

Example

Use conditions according to the platforms

Trace window

Popup menu of trace window

BuildAutomationVariant

Calling a DLL written in Visual Basic

Constants for managing the WLanguage types

Constants for sound management

Constants used by ExecutePresetAction

Constants used by the TraceStart function

EndAutomatedProcedure

InAndroidEmulatorMode

InAndroidMode

InAndroidSimulatorMode

InAppleWatchEmulatorMode

InAppleWatchMode

InAppleWatchSimulatorMode

InAutomaticTestMode

InBackgroundMode

InComponentMode

InDelayedProcedureMode

InPocketSimulatorMode

InPrelaunchedSessionMode

InReportsAndQueriesMode

InServiceMode

InSimulatorMode

InStoredProcedureMode

InTSEMode

InTestMode

InUMCMode

InUniversalWindowsAppMode

InUniversalWindowsAppSimulatorMode

InUniversalWindowsPlatformMode

InUniversalWindowsPlatformSimulatorMode

InWindowsPhoneEmulatorMode

InWindowsPhoneMode

InWindowsPhoneSimulatorMode

InWindowsStoreAppMode

InWindowsStoreAppSimulatorMode

Voice commands in your applications

Use conditions according to the platforms
Trace window
Popup menu of trace window
Special case

WINDEV

WEBDEV

WINDEV Mobile

Others

See also

Trace (Function)

In french: Trace

Displays the requested information (content of a control for example) in a window opened in parallel of the current window.

Note: Trace is useful during the development to check whether a program is operating properly. In the editor, the "Trace of debugger" displays the information found in the trace window as well as the full text of errors that occurred.

Versions 17 and later

This function is now available for Android applications.

This function is now available for iPhone/iPad applications.

New in version 17

This function is now available for Android applications.

This function is now available for iPhone/iPad applications.

This function is now available for Android applications.

This function is now available for iPhone/iPad applications.

Versions 18 and later

This function is now available in Android Widget mode.

This function is now available in Windows Store apps mode.

New in version 18

This function is now available in Android Widget mode.

This function is now available in Windows Store apps mode.

This function is now available in Android Widget mode.

This function is now available in Windows Store apps mode.

Versions 21 and later

This function is now available in Apple Watch mode.

This function is now available in Universal Windows 10 App mode.

New in version 21

This function is now available in Apple Watch mode.

This function is now available in Universal Windows 10 App mode.

This function is now available in Apple Watch mode.

This function is now available in Universal Windows 10 App mode.

Example

// Display information in the trace window
Trace("Calculation result: " + ResCalc)

Syntax

Trace(<Information> [, <Additional information 1> [... [, <Additional information N>]]])

<Information>: Any type

Set of elements that will be displayed in the trace window.

<Additional information 1>: Any type (optional)

Additional elements that will be displayed in the trace window. Will be displayed on the same line as <Information>.
This syntax is not available in this version.

<Additional information N>: Any type (optional)

Additional elements that will be displayed in the trace window. Will be displayed on the same line as <Information>.
This syntax is not available in this version.

Remarks

Use conditions according to the platforms

Trace is taken into account during a test in the simulator and during a test on the Pocket PC. In this last case, the information is directly displayed in the environment, in the "Trace of debugger" pane.

Trace can be used to display the requested information in a file only. By default, this file is created in the UNIX temporary directory and is named "Trace_<Project>.txt".

The information of Trace is displayed at the beginning of the HTML page returned.

The trace window is displayed in Go only for the dynamic pages (non-AWP pages).
In AWP mode and in deployment, Trace can only be used to write the specified information into a file (trFile constant used with TraceStart).

Trace displays the requested information in the standard output window of Xcode.

Trace is used to save the requested information in the application log (called "ADB log") at run time or in emulator mode. This information is found at "Info" level.

This log can be viewed when the device is connected via USB or when using the emulator from the DDMS application supplied with the Android SDK.

See Managing ADB logs for more details.

Trace window

The information passed in parameter is displayed on the next line of the trace window.
The trace window is automatically opened during the first call to Trace (TraceStart is automatically run). By default, this window is opened in the top left corner of the screen.
The operating mode of Trace is equivalent to the operating mode of Info but the display is performed in a parallel window, without waiting for keys.
The trace window displayed from a browser code differs from the trace window displayed from a server code. Therefore, two different trace windows can be opened at the same time.

Popup menu of trace window

The popup menu of Trace window is used to:

copy/cut/paste the content of trace window.
save the content of the trace window in a text file.
Caution: This option is available only if the wdxxxstd.dll library is found on the end-user computer.
clear the content of trace window.
open the trace window on top of all the other windows (including the windows from the other applications).
store the size and position of the trace window when it is closed. When re-displaying this window, it will be displayed according to the size and position stored.
display an horizontal scrollbar.
display special characters in gray and literally: EOT, TAB, etc. Therefore, the "Carriage Return" (CR) characters found correspond to "<\r><\n>".
Note: This option will be taken into account from the next line of information displayed.

Special case

PageDisplay and PageRefresh cannot be used after Trace.

If PageDisplay and PageRefresh are used, a warning message will be displayed by the PHP engine.

Component : wd250vm.dll