Hi @lkirit2000. I don't think there is a way to truly 'Link' the text showing in that 'view label' with the 'Item Number' value of a specific row in a 'Parts List' somewhere else in that drawing. It may be possible to write enough code to figure out what that value should be, then make sure the value in that view label is correct, but it would likely have to be a 'static' value...meaning if you were to change the Item number for that line in the Parts List, it would not automatically update that value in that view label. Important factors in this sort of thing are how the view was configured. Such as, is that view directly referencing one specific part file, or is it directly referencing the main assembly, where the 'representation' is set in some way to limit the view's contents to just that one component occurrence? If it references the main assembly directly, then it may be pretty complicated to figure out which component occurrence is showing in that view. If it is referencing the part file directly, then there is no direct link to which Item Number it may be within a parent assembly. So, would have to capture some aspect of the view's referenced document, then iterate each row of the parts list, checking which assembly occurrences the row references, then dig deeper to the actual document the occurrences reference, and try to cross reference the two. If a match is found, then capture the parts list row's item number value, and go back to the view, get the view label, and dig into its text to include the value, and format the result the way you want it. Pretty complex process.
Pretty much only the Balloon annotation objects are designed specifically for that purpose, and can keep that 'Link' or connection live. This is partially because of an actual reference (BalloonValueSet.ReferencedRow) to the DrawingBOMRow, which the PartsListRow also references (PartsListRow.ReferencedRows) for the information it shows. In some other types of situations involving other types of data, there is sometimes 'FormattedText (containing XML Tags)' somehow involved, but I have never seen any formatted text related stuff related to 'linking' to a specific row of the Parts List, or specifically its Item Number before.
Wesley Crihfield

(Not an Autodesk Employee)