(Access uses 0 for False, and -1 for True.) In table design, open the Properties box and you see another Validation Rule. The rule is applied after all fields have been entered, just before the record is saved.Use this rule to compare values across different fields, or to delay validation until the last moment before the record is saved.Examples: The Yes/No field in Access does not support Null as other databases do.To simulate a real Yes/No/Null data type, use a Number field (size Integer) with this rule.
A validation certificate has been issued for each of the modules listed.Updates may have occurred since the printing of the original certificate and will only appear on the validation entry.This list is typically updated either the day of or day after a certificate is issued.It makes your page much more user-friendly, and takes out the frustration of having to fill out the same form repeatedly.It's also very precise, as you can point out the exact field where there's a problem.How I fixed the Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that configuration specifies the same validation Key and validation algorithm.