To retrieve multiple values from a multi-select list custom field (for example) simply create a string array variable and set the value to the custom field.
To set the values of a multiple select custom field simply set the custom field to equal a an array of strings or a string array variable.
Getting Values
NOTE: Getting the value using the customfield id is not the best practice when writing SIL scripts. See the Working with Custom Fields example for more information on the best practices.string [] mySelections = customfield_12345;
Setting Values
NOTE: This script assumes that it is running in the context of an issue. Like in a workflow script or listener for example. If you would like to test this script from the SIL Manager, add an issue key to test with under the Run Configuration setting (Run > Run Configuration > Context).customfield_12345 = {"Existing Option 1", "Existing Option 2"};
Supported Field Types
Checkboxes
Labels
Select List (multiple choices)