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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Close the report editor and save the report definition with the same name, lazreporttutorial.
Installation The LazReport components are not installed by default, they don’t appear on the toolbar right after the installation of Lazarus. As lazrepirt can see, the category we defined is shown in the ComboBox above the variables.
On the Other tab, you can fill out some report metadata, as is done on the screenshot below: Note the extra set of square brackets around the calculation. First it’s assumed that LazReport is already installed and the dataset component, called “Dbf1” here, is already configured and active.
They are obtained by clicking Variable and then Category Otherthen double-click on the desired variable once you are familiar with the variables, you can also just type them. LazReport has the ability to save the report displayed in the preview window using a user-defined format.
Integer procedure ; p1p2p3: By default, all bands are processed but TfrCSVExportFilter changes this property to process only master header, column header and master data bands. Calc P2 lazrepor Result: The report designer can be invoked at runtime. A Picture editor shows up:. Also, don’t we need to add a rectangle somewhere and show variable test1? The second lets you select a preset format All ExportFilter clases share this lzzreport and the developer has to type-cast the sender argument to the desired export filter class, for example:.
The familiar text editor appears.
If you wanted to always show the same picture, you’d just need to click Load If not, please do so. To this add the following code to the project:. It has an extension mechanism with support for plugins that can be used to add any amount of export filters. Choose desired margins, number of columns, and the space between them, layout order etc. Developer’s manual and User Guides specific for LazReport are yet to be written.
As you may guess, you can not only use the variables listed via the Variable button, but also database fields via DB Field. It’s a bit long, but if needed, you can create a descendant of TfrReport with an easier printing method or classcreate a PrintReport Report: Now we have to tell the report you need to treat all data as binary jpg image files.
Each variable must be linked with a field.
Lazarus: Reports with LazReport
To do this, open the report editor and select the File menu and the Variable List. If you want to include the total number of pages with the page number on each page, you need to select Two-pass report which tells Lazreport to build the report twice, inserting total number of pages on the second run. It uses a visual designer to create banded reports and includes a report engine with previewer and an interpreter to run user scripts.
Alternatively, as indicated before, you can write the resulting text directly. 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.
SQLite Database Tutorial: Report generator
In the report designer, we started by adding a “Report title” band. We’re assuming you already have your database set up as specified in SQLdb Tutorial0. DesignReport ; end. String ; var ParValue: Tutorail mentioned, see LazReport Documentation Documentation for an overview of lazrfport functions.
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.
Variant ; Var valley: This turns the picture into an object associated with the data field. In the first line the title of the report should be indicated. By default, Lazarus DBImage is more flexible and stores the file lazeeport before the image data, allowing different file formats to be used.
You can use all kinds of operators and functions in your calculations; see LazReport Documentation Documentation for an overview.
Choose a color for the background with the Bucket Fill button on the toolbar. ShowReport ; end ; TForm1. TStream ; var GraphExt: In the Report title band, add a rectangle.
TUTORIAL FOR LAZREPORT
Because Hire date is a TDateTime field which internally is a floatI cheated by just using the float value of January 1st, which is Double-clicking on the frReport icon brings up the report designer.
Return to Lazarus do not forget to save your report, if necessary and set up the Tutlrial event of the frReport1′ component by adding the following code:. This can also be done manually by including the export filter unit name in the Uses clause of the unit where TfrReport is used. You can double-click later on lazrepot band if you want to change the data source.