using args class

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Posted on by maram fraij

I have a menu item in a form when it is clicked a class is called. The form has two data sources. How can I retrieve the active records data of the two data source inside the class to do required calculation ?

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Dick Wenning 8,705 Moderator on at

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on the property of the menuitem in the form, there is a method called, datasource,

this is most of the time the same on the grid, also multiple selection is possible.

next the menu item can point to a class, in that case it called the static main method.

this main method has an _args Method.

next example does something like that

// Called from EP for changing the status of an activity

static void main(Args args)

{

Common record = args.record();

smmActivities smmActivities;

FormDataSource dataSource;

;

if (!args)

{

throw error("@SYS25407");

}

if (record)

{

smmActivities = record;

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Martin Dráb 239,680 Most Valuable Professional on at

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You can pass only a single record in Args.record(), nevertheless you can use other properties to get the other data source. You can use caller() to get the caller form and access all data sources (FormRun.dataSource()) or you can send the reference in parmObject() (it can be even used for passing multiple values packed in a class).

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maram fraij on at

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if the caller form has many datasources, how can I determine to which datasource the record returned by Args.record() belongs?

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Martin Dráb 239,680 Most Valuable Professional on at

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You can find table ID by Args.dataset() or Args.record().TableId. If you have more data sources for the same table, you would have to check the name of the data source, relationships or something else that you can interpret in your case.

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Kumar Gaurav @ MS on at

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Besides above mentioned solutions , you can also create method on the form to pass reference of data source and through caller object you can catch those references in class, however you need to be careful in doing this because if not properly validated at class level this can lead to run time errors for other callers.

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Community Member on at

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in this case I would suggest write all the calculation logic in a method in the form itself and access the form method on form in class using args.caller()

Please verify and update with your finding

and let me know if you need further support related to this customization

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Martin Dráb 239,680 Most Valuable Professional on at

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I must oppose the suggestion to write business logic in forms - it causes many troubles. Collect parameters and send them (you can use a class to group them) to a class which will do the logic not related to user interface.

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Dick Wenning 8,705 Moderator on at

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multiple records is possible.

msdn.microsoft.com/.../aa557882.aspx

this example should be placed in the main of the class.

the datasource is also available in args class

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