List (Object) called with invalid parameters. ( Multi-select lookup)

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Posted on by Enxhi Bregu

123

I am creating a Multi-select lookup for InventLocationId, and I am using sysoperation framework. When my parm method returns a list, this error happens : List (Object) called with invalid parameters.

Contract class :

Class declaration

[ DataContractAttribute,

SysOperationContractProcessingAttribute(classStr(EB_CollectionUIBuilder)) ]

class .....
 {
 List inventLocationId;
 }
 [ 
 DataMemberAttribute,
 AifCollectionTypeAttribute(‘ inventLocationId ‘, Types::String)
]
 public List parmLocationId( List _inventLocationId = inventLocationId)
 {
 inventLocationId = _inventLocationId;
 return inventLocationId ;
 }

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Vilmos Kintera 46,149 on at

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I believe you did the same mistake as per this community forum topic, when trying to incorrectly use a List object, which is not going to work. The suggested way is in the last post for using the UI builder class:

community.dynamics.com/.../162468

You need to override the lookup method for the control, and use SysLookupMultiSelectGrid helper class. The class decoration for your method with the List object also needs some changes.

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