c# - In 3 level JqGrid, get the first table's primary key when the 2nd table's "+" sign is pressed -

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I'm new to JqGrid and please help me with this request.

I have a 3 level hierarchy as shown in the JqGrid setting, it is not exactly identical, but very similar. My requirement is to pass the primary key of the Customer Grid , when the ordergrid is expanded.

Or in short, I 

  Public Zero SetUpThreeLevelGrids (ThreeLevelHierarchyJqGridModel Model) {var customersGrid = model.CustomersGrid; // code here int cId; // cId = & lt; Customer Grid Customer ID;; // ***** How to get it ****** Order grid. Data url = url Action ("Three Level_OrdsdataInquested", new {customerId = cId}); // code here}   
 I would like to pass that variable to the  ThreeLevel_OrderDetailsDataRequested  method:  
  public JsonResult ThreeLevel_OrderDetailsDataRequested (Int customerId , String parentRowID) {// code here}    
 
 
 I have created a fixed variable I am not sure whether this could break something or not I just wanted to do it.  
  public static intelidid = 0;   
 In the action method for the second grid, I assigned the customer ID value.  
  Public JsonResult ThreeLevel_OrdersDataRequested (string parentRowID) {var NorthWindModel = New NorthwindDataContext (); Var Model = New Three Level Hierarchy Jake Grid Model (); CustomerId = int.Parse (parentRowID); SetupThreeLevelGrids (model); // code}   
 reached the global stable variable in the third level grid.  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
  
 
 Select customerId // fixed global variable o // code}   
 If there is a better suggestion for getting the primary primary key of the 1st level table in a third level grid, please let me know.

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