CRM2015 Update 1 has finally introduced the capability to manipulate/access grids in a supported way. The API methods are documented in https://msdn.microsoft.com/en-us/library/dn932126.aspx . However not all methods are documented. These are the additional methods that you can use, but not documented in msdn. The assumption is the subgrid is displaying the contact entity records. Object GridRow Collection Method get Sample Usage Xrm.Page .getControl("GridControlName") .getGrid() .getRows() .get(0) Description Gets the row at the specified index in the grid Object GridRow Collection Method getByFilter Sample Usage Xrm.Page .getControl("GridControlName") .getGrid() .getRows() .getByFilter(function(r){ return r.getData() .getEntity() .getAttributes() .getByName('fullname') .getValue() === 'Max Power'; }) Description Returns only the rows that have fullname attribute = Max Power Object GridRow Collection Method getFirst Sample Usage Xrm.Page .getControl("GridControlName") .getGrid().getRows() .getByFilter(function(r){ return r.getData() .getEntity() .getAttributes() .getByName('fullname') .getValue() === 'Max Power'; }) Description Returns only the 1st row that has fullname attribute = Max Power Object GridRow Method getKey Sample Usage Xrm.Page.getControl("GridControlName") .getGrid() .getRows() .get(0) .getKey() Description Return the primary key of the 1st row Object GridRow Method getId Sample Usage Xrm.Page .getControl("GridControlName") .getGrid() .getRows() .get(0) .getData() .getEntity() .getId() Description Return the primary key of the 1st row Object Attribute Method getValue Sample Usage Xrm.Page.getControl("GridControlName") .getGrid() .getRows() .get(0) .getData() .getEntity() .getAttributes() .getByName("fullname") .getValue() Description Gets the value for the fullname attribute from the first row in the grid. If this attribute is not a grid column, this method will error as getByName will return null Object Grid Method openAssociatedGrid Sample Usage Xrm.Page.getControl("GridControlName") .openAssociatedGrid() Description Opens the associated view, if it is in the navigation pane
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