PML and PML2 DbUserChanges

DbUserChanges

Mohamed Ashraf over 1 year ago

I am trying to use .net to get userchanges in MDB using the following

var hasChanges = MDB.CurrentMDB.ChangesSinceDateTime(DateTime.Now.AddDays(90), out DbUserChanges userChanges, out PdmsMessage mess);

hasChange is true , but userChanges is null

any ideas ?

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Léo SALVADOR over 1 year ago in reply to Mohamed Ashraf +2

Hi, you are looking for changes after a date in the future (90 days from now), I think you wanted to use AddDays(-90) ?
Mohamed Ashraf over 1 year ago in reply to Léo SALVADOR +2

it works well , Thank you very much

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Mohamed Ashraf over 1 year ago

Léo SALVADOR
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Léo SALVADOR over 1 year ago in reply to Mohamed Ashraf

Hi, you are looking for changes after a date in the future (90 days from now), I think you wanted to use AddDays(-90) ?
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Mohamed Ashraf over 1 year ago in reply to Léo SALVADOR

thanks, How to get old value of attribute ?
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Léo SALVADOR over 1 year ago in reply to Mohamed Ashraf

You can use this method:

SwitchToOldSession(DbSession oldSession)

On the concerned database instance (Aveva.Core.Database.DB).
After the switch when you will query an attribute, you will retrieve the effective value during the chosen session.

Then you can go back to the last session using:

SwitchToLatestSession(true)
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Mohamed Ashraf over 1 year ago in reply to Léo SALVADOR

it works well , Thank you very much
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Mohamed Ashraf over 1 year ago in reply to Léo SALVADOR

it works well , Thank you very much
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