I wrote a DisplayInColumns custom tag recently for a project and have found it to be extremely useful. The tag minimally accepts as parameters a query and a formatter and optionally includes the number of columns and table attributes. The formatter is a UDF that is called to format each record in the query–referred to as a callback.
With the DisplayInColumns custom tag we can display a record set of names in three columns with the following code (which includes the sample data).
s = "Andrew,Andy,Ba,Bach,Brad,Chafic,Chau,David,Feng,Jay,Jim,Laura" &
q = queryNew("");
queryAddColumn(q, "name", listToArray(s));
This code does three things.
- It sets up the source data which for demonstration purposes we’re hard coding.
- It creates a myFormatter UDF which formats each record by displaying the record number and the value of the “name” column.
- It calls the DisplayInColumns custom tag to display the data in three columns.
The result of this code follows is this table.
s = “Andrew,Andy,Ba,Bach,Brad,Chafic,Chau,David,Feng,Jay,Jim,Laura” &
q = queryNew(“”);
queryAddColumn(q, “name”, listToArray(s));
The advantage of this custom tag is that by using a callback UDF it is extremely flexible in presentation. The tag also supports providing attributes for the table elements it creates.
You can view or download the tag.
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