Question

You are writing an OnChange event handler in a model-driven app form. When a user selects a value in the 'Primary Contact' lookup field, your JavaScript must read the selected record's GUID and entity logical name to pass into a subsequent Xrm.WebApi retrieve call. Which Client API expression correctly returns the data you need?

Accepted Answer

formContext.getAttribute("primarycontactid").getValue() returns an array of lookup objects that expose id, name, and entityType.

Answer

formContext.getControl("primarycontactid").getValue() returns a single string containing the GUID only.

Answer

formContext.getAttribute("primarycontactid").getText() returns an object with id and entityType properties.

Answer

Xrm.Page.data.entity.attributes.getValue("primarycontactid") returns the entityType but not the id.