FormDataFieldEventType::Validating in D365

FormDataFieldEventType::Validating in D365

/// <summary>

/// Prevent changing the start mileage field on the FMRental form to a value that is equal to 1

/// </summary>

[FormDataFieldEventHandler(formDataFieldStr(FMRental, FMRental, StartMileage), FormDataFieldEventType::Validating)]

public static void StartMileage_OnValidating(FormDataObject sender, FormDataFieldEventArgs e)

{

    var dataObject = sender as FormDataObject;

    var args = e as FormDataFieldCancelEventArgs;

    if (args != null && dataObject != null)

    {

        var datasource = dataObject.datasource() as FormDataSource;

        if (datasource != null)

        {

            FMRental record = datasource.cursor() as FMRental;

            if (record.RecId > 0)

            {

                if (record.StartMileage == 1 )

                {

                    boolean doCancel = !checkFailed("Start Mileage = 1 is not allowed");

                    args.cancel(doCancel);

                }

            }

        }

    }

}

Thanks,

Vikas Mehta.