![]() There are many ways to do this as Ruslan or Ivan can tell you. If the sequence number doesn't exist, the record was deleted before I refreshed my listbox. If true, the record still exits and I use a server side cursor to lock the record while I perform whatever operation needs to happen. The Xojo rowtag can also take an array if you want to get creative and put both the RecID and the sequence # in the rowtag.īefore I complete any record operations, i check the DB to see if the sequence # still exists and if so, does the RecID match. Which one goes where is up to you and your programming style. I know I can load so much at a time but there is no scroll event or anything I can see with which I could load more data in while the user is scrolling down the list. I retrieve both RecID and sequence number from the DB when populating a listbox and place one field in the rowtag and one in a column with a width of 0 making it invisible. Does anyone have suggestions and possible examples of loading a weblistbox with a huge amount of data from a table. We are currently planning to ship this updated Web framework in Xojo 2023r2. Bootstrap continues to improve and as a result we are working to upgrade the Web framework to the latest version. Bootstrap is the toolkit the Xojo Web framework uses to create the UI controls for your web projects. I also set this field's "Unique" attribute to true. For information on how to implement your own custom subclass of this class with Javascript, see the WebSDK. Bootstrap 5 is Coming to the Xojo Web Framework. I found it safer to place a ULLONG field in tables were I needed permanency and use either a Serial32 or Serial64 (which is basically a sequence) to generate a unique identifier for each record. A List Box displays a scrolling list of values in one or more columns. If another user deletes, let's say record 5 (RecID 5), and you click on the listbox with the rowtag of (RecID) 5 - any DB operations you perform with that RecID will be on the wrong data. A value can be an absolute value (in pixels), a percentage, a relative length expressed as 'i' where i is an integer, or an '' that indicates 'fill in the remaining width'. A RecID can be reused when a record is deleted and new data is inserted into the DB.įor example, after you populate the listbox with the records you want (using the RecID as the rowtag), this data now becomes stale. Published Decemby Javier Menendez Xojo 2022r4 includes a much improved WebListBox preview in the Layout Editor. A list of comma separated values, with each value controlling the width of the associated column. I quickly had issues with data consistency because the RecID field is not a permanent identifier for data. ![]() I also used the RecID field as the rowtag in a Xojo listbox.
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