List & Label can also be used within web applications, albeit with a number of limitations. For ASP.NET-based web applications, List & Label contains components for displaying reports in the web browser (see Use of the Web Report Viewer), which also support complex features such as drill-down, as well as an independent version of the Designer with which reports can be designed on the server with the familiar List & Label Designer (see Use of the Web Designer and Use of the Web Report Designer).

General Requirements and Notes

• The server has to be a Windows system, List & Label can only be run on Windows platforms. This restriction of course does not apply to the clients.
• If no printer driver is installed for the user account under which the web application runs, the property Printerless must be set to true. Then a virtual device will be used for rendering. Note that this may have a minimal impact on the positioning of the output. In addition, it must be ensured that the user account used can load the List & Label DLLs, i.e. that rights have been assigned for the path of the DLLs.
• Printing within a web application is basically the same as an export e.g. to PDF format, where all dialogs are suppressed. How this is done in general is described in section Export Without User Interaction. After the report is generated that way, the browser of the user can be directed to the created file by the usual mechanisms. Alternatively the file can be sent directly to the user via e-mail if the creation is to be scheduled (see also class MailJob).

The following image visualizes the principle:

Contains components to use the web designer without local List & Label client installation to design project files on the server.