Number of records returned from READ - Forum - Mobile - Progress Community

Number of records returned from READ

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Number of records returned from READ

  • When invoking a service (read operation) is there a way to determine how many records were returned?

    I have a page where I am scanning a barcode and then invoking the read service. If the barcode is fetched from the DB my controls are populated with the record info. However, if the barcode does not find a matching record in the DB all my controls on the page say 'undefined'. I would like to trap the results in the service success event and pop an error then clear the undefined.

  • Will

       data.dsXxxx.ttXxxxx.length

    do it?  My app won't play ball at the moment, so I can't test it, but I think that should work.

  • Kind of.

    If records are actually contained in ttItem then data.dsItem.ttItem.length will return the number of records. If no records are returned I will get the following error.

    Uncaught TypeError: Cannot read property 'length' of undefined

  • If I use if (data.dsItem.ttItem === undefined) then I can trap it.

    Thanks.