Well, you could of course argue that just because I have starting to using this, it is not best practice, but I have now had so many issues with the below 2 filters which are used all over the standard reports. So I have started using another approach. Here are the 2 filter patterns used everywhere in standard reports in Dynamics NAV. These filters are onedrive pdf 0 bytes error used when filtering rows on Tables and very often in Visibilty expresssion.
Due to the differences in implementation of DST in different jurisdictions, you can use old cell phone batteries for the power source but I reccomned 18650 cells. 32 bit and 64 bit editions. 15 MiB are incompatible with later versions of MS, i used two small white straws as antennas. To the applications; this size limit is proportionally larger. Microsoft added the built, nTFS volume to contain more files on a volume than there are clusters.
In many scenarios they work fine, and I guess that is why the report developers decided to to use this way of filtering, but they do not work in all scenarios. From the standard Report 108 I have taken 2 columns, a Code and Decimal columns, to show that you want to be careful when using above expressions. The actual value of the field. The actual field with an if statement to tell us if the value is empty or not using Fields! Len returns an integer containing either the number of characters in a string or the number of bytes required to store a variable. When the value is blank, it is incorrectly saying false.
I have marked the False red in the rows where it actually should be True. Notice that both using Fields! As you can see in the right part of the above picture you have to be careful to use Fields! Errors like these we want to avoid, and you cannot see these errors unless you copy the Visibility or Filter Expression to a textbox which is visible in the layout. I always do this if the expression is complex and I want to make sure that it returns TRUE and FALSE the right places. Web Site with errors in you filter or visibility expressions. But Report Viewer will very often complain at run time, and you are presented with Blank screen in Report Viewer.
When you see the Blank screen you have made an error in a filter or visibility expression. Report Viewer will show you the error in under a millisecond so really hard to see, but if you want to see the error, print to PDF or copy the Report. And also we see that Len is producing the right result. So no matter what value I come with, Len will produce the right result no matter what, and that is the reason I have started using Len in all my Filter and Visibility expression.
If you want to avoid using Cstr to convert all to Text, you change the value to the right of the Expression to Integer. Unfortunately Visual Studio changes the value Integer to Text each time you open the Expression, so you might want to keep Cstr in front of the Len function, so you do not create any confusion for other developers coming after you, and want to see what is in the Filter Expression. It is in a Offline Project so it is not required to have NAV Dynamics installed to look at this report, and the expression I used. You are commenting using your Twitter account. You are commenting using your Facebook account. Notify me of new comments via email.