Free Pascal / Lazarus: SQLite Database Tutorials: Reports with LazReport. Free Pascal Lazarus Project – Sync’ed with Lazarus SubVersion trunk every 15 minutes – alrieckert/lazarus. jesus LazReport, two additional export filters – TfrImageExportFilter, TfrH tutorials/stringgrid · LazReport, added stringgrid/variables tutorial from German.
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LazReport is a group of components to add reporting capabilities to applications. It uses a visual designer to create banded reports and includes a report engine with previewer and an interpreter to run user scripts.
The report designer can be invoked at runtime. LazReport is based on FreeReport 2. Developer’s manual and User Guides specific for LazReport are yet to be written.
TUTORIAL FOR LAZREPORT
Platform specific things described there like OLE objects are not implemented in LazReport, also some examples or pictures make reference to samples available only on Delphi. Until LazReport documentation is elaborated, this Wiki page tutofial be used as a documentation container; maybe in the future the missing documentation could be generated from here. Users are welcomed to add topics that they feel need to be documented.
Though it is probably not needed much, LazReport allows you to define your own functions. As mentioned, see LazReport Documentation Documentation for an overview of existing functions. You need to define your functions following the following template in the file FR. Each parameter is separated by commas and can be an expression, a constant, a variable, a field or data.
Alphanumeric type constants should be limited by a character.
The variables are delimited by and. A function definition is nice, but we haven’t specified how these functions work.
You may notice the appearance of a small Click below to open the editor:. Depending on the number of parameters, you have more or less edit areas.
SQLite Database Tutorial: Report generator
LazReport has the ability to save the report displayed in the preview window using a user-defined format. It has an extension mechanism with support for plugins that can be used to add any amount of export filters. An export filter is a specially designed class which is registered in LazReport and allows you to save the report using one or more formats. When LazReport is installed, it includes some filters ready for use, these are: A filters package is installed in the same way as any other Lazarus Package; after restarting Lazarus, the filters usually appear as icons in the LazReport tab on the Component Palette.
An export filter is added to your application by simply dragging one of these icons to a form or data module where TfrReport component exists, this is automatically registered and remains ready to use. This can also be done manually by including the export filter unit name in the Uses clause of the unit where TfrReport is used.
LazReport Tutorial – Free Pascal wiki
Where TheReport holds an instance of TfrReport component. It’s not necessary to prepare the report again if it has been prepared previously. In order to make changes in parameters, the developer can create an event handler for TfrReport. All ExportFilter clases share this event and the developer has to type-cast the sender argument to the desired export tuyorial class, for example:. By default, all bands are processed but TfrCSVExportFilter changes this property to process only master header, column header and master data bands.
This export filter tries to make a text representation of a graphical report by fitting the original graphical coordinates into a lazteport coarse grid where each unit is of “UsedFont” pixels, depending on the value of UsedFont value, the exported output may more or less represent the layout of objects in graphical report.
This special text export filter produces Comma Separated Value output actually any character can be used as separatorit differs from its ancestor in that it doesn’t try to create text layout representation of graphical report, instead, for each record output it tries to guess the fields order from the source report, it then produce a list of fields using a separator defined by the user. Beside the properties inherited from its ancestor classes it defines some properties to customize the generated output.
This special text export filter produces valid “HTML 4. Currently it defines only one additional property.
To calculate the total for values of each page added to the total on the previous page, follow these steps:. First it’s assumed that LazReport is tutorizl installed and the dataset component, called “Dbf1″ here, is already configured and active. Are these names ok? Variant ; var valley: Integer procedure ; p1p2p3: Variant ; Var valley: Var Par1Par2: Calc p1 ; Par2: Calc P2 ; Result: Strings [ FNo ] ; end ; Val: Retrieved from ” http: Personal tools Create account Log in.