Skip to main content

How to add footers to NRapid reports

Grouping data it's really cool feature, that help us out to provide some sort of data visualization enhancement, it makes the report easy on the eyes and allows to the users  to figure out what’s going on without going into much detail. But usually, that it’s not enough, along with grouping, we'll also need to provide some additional info, such as the day takes, month takes, etc, etc… to complement the grouping functionality and make the report really useful.

This time I going to work with products and categories, I’m going to build a report to show units in stock for each product on each category in our database and add a footer to show the units per category (this is the sum of the units per product for a given category).

In a previous post I’ve shown you how to create reports and group data, so I’ll going to skip those steps here and concentrate in the footer section.
The code you will see below must be place inside the configure report method (also covered in previous posts)

Basically we’re telling to the report engine to go on each category change and execute the specified method, whatever the method returns, it’s going to go into the report right before the next category group.

As we can do with links, it’s also possible to specify callbacks for grouping functions. Those callbacks will be invoked automatically by the report engine at the appropriate time and we will be able to handle that event, so to speak.

The code may look something like this:

* It’s also possible to work with an in-memory data table instead of go a lot of times to the database, but for the sake of simplicity I’m going to leave the code just like that.

When you execute the report, you should get something like this:

You can get the source code of NRapid from here
And the sample app from here
The Northwind database is available from download at


Popular posts from this blog

Moving to Medium

It's been a long time since I want to give medium a try, and finally, I made some time to do it. To get started on the new platform, I'll be doing series on "Getting programming concepts, languages and tools". If it sounds interesting to you, please take a look at the first post  Getting AWK  and spread the word if you like it. I'm not going to migrate old entries to the new web site. They will remain here safe and sound! As usual, thanks for reading!

Working with unattended reports

In this post I‘ll show you how to create reports that NRapid will execute into an unattended mode. I strongly recommend using this kind of reports in automation scenarios only , and let the user see the print preview dialog in the rest of cases. The only difference between this reports and the standard ones, is that you will cannot make use of dialogs, the runtime will always pass in empty views to the ConfigureReport method. The ConfigureReport method will be executed, but you will have to grab the arguments from somewhere else. The execution pipeline is the same that NRapid uses for standard reports. This is the code to print out the whole list of categories in a dialogless mode. Notice that this report inherits from UnattendedReport class, this class tells to NRapid “run the report unattended”. Also notice that this class comes with a convenience method to configure the report with no arguments. You still can override the one that gets the view data but you will always

How to create MS Word documents from Office templates using C#

The OpenXML SDK allows you to do pretty much anything you want with office files such as Excel, Word, etc… While many people like this library, I found it complex, unintuitive and poorly documented, not to mention the awful xml format that uses under the hood to represent the documents, styles, etc. So I decided not to use it and build my own solution. If you, like me, don’t like that library, you will find in this post an alternative approach to build word documents from templates using c#. A neat trick to work with Office is to use the macro recorder to understand how things work. The macro recorder allows you to start a macro, do something by hand, stop it, and then take a look at the generated VBA code. Once you do this, you are pretty much set. This is how it looks the template I’am going to use. Note: save the file as a Word template (.dotx) This is the code to create Word documents from C#: By running the code, you should get a document that looks