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POCreating hierarchical JSON result from multiple tables using linq expression
 

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  1. POCreating hierarchical JSON result from multiple tables using linq expression
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    <p>I have seen a few responses on SO dealing with PHP and JSON but using linq is throwing a wrench into what I am trying to do.</p> <p>High Level: I have two views, BatchList and BatchDetails. BatchList is a view of all batches in my database while BatchDetails has a list of all the orders in a given batch.</p> <p>I am trying to build a JSON structure with the following hierarchy:</p> <pre><code>BatchList.BatchNumber 1 Parent BatchDetails.OrderNumber 1 Children bound by related BatchNumber 1 BatchDetails.OrderNumber 2 BatchDetails.OrderNumber 3 BatchList.BatchNumber 2 Parent BatchDetails.OrderNumber 1 Children bound by related BatchNumber 2 BatchDetails.OrderNumber 2 BatchDetails.OrderNumber 3 </code></pre> <p>I know once I build this that I can just JSON encode it and pass it to my view to display. I have seen examples like:</p> <pre><code>{ "d" : { "results": [ { "CategoryID": 1, "CategoryName": "Beverages", "Description": "Soft drinks, coffees, teas, beers, and ales", "Products": { "results": [ { "ProductID": 1, "ProductName": "Chai", "QuantityPerUnit": "10 boxes x 20 bags" }, // ... // Product 2 // ... ] } }, // ... // Category 2 // ... ] } } </code></pre> <p>Currently the only linq expressions I have are:</p> <pre><code>public IQueryable&lt;vwBatchList&gt; AggregateBatchList(int coid) { var contex = new LBPEntities(); var batchList = (from x in contex.vwBatchLists where x.CoId == coid select x); return batchList; } </code></pre> <p>Which I can then encode the results and pass to a grid.</p> <p>But i want to relate it to this expression which references the batch number:</p> <pre><code>public IQueryable&lt;vwBatchDetail&gt; AggregateBatchDetails(string batchNumber) { var contex = new LBPEntities(); var batchDetails = (from x in contex.vwBatchDetails where x.BatchNumber == batchNumber select x); return batchDetails; } </code></pre> <p>But creating that from two related tables in a database is escaping me. I have not been able to find any good solid JSON tutorials dealing with this problem, all examples generally have hard coded hierarchies.</p>
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