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Hide Expansion indicator (+/-) based in colum value in the row


I have a 3-level igHierarchicalGrid in an MVC project which is loaded on demand using a JsonResult.  Only the first level is loaded initially, and the data for the second (and third) levels is loaded only when the expansion indicator (+) is clicked for the relevant row.

However, there may not be data for the second and/or third level - on each level i have a count records for the next level, and if this count is 0 I would like to hide the Expansion (+) indicator for the next level.

Is this possible, and how would you do it?

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