Convert datatable to asenumerable not working in ASP.NET core 2.0

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i just started with Asp.net code 2.0 and migrating my code. and AsEnumerable() is not working in .Net Core.

my data is coming from table where

api_module

and

api_resource_name

are the columns

var result = ds.Tables[0].AsEnumerable().GroupBy(x => x.Field<string>("api_module")).Select(x => new { api_module = x.Key, api_resource_name = x.Where(z => z.Field<string>("api_resource_name") != null).Select(z => z.Field<string>("api_resource_name")).ToList() });

What I have tried:

i have tried using the for loop but could not able to solve my issue.

my required json format is

[  
   {  
      "api_module":"approvals",
      "api_resource_name":[  

      ]
   },
   {  
      "api_module":"bpsusers",
      "api_resource_name":[  
         "alternateapproverfor",
         "alternateapprovers"
      ]
   },
   {  
      "api_module":"commodities",
      "api_resource_name":[  

      ]
   },
   {  
      "api_module":"commoditygroups",
      "api_resource_name":[  

      ]
   },
   {  
      "api_module":"companies",
      "api_resource_name":[  
         "addresses",
         "bids",
         "commitments",
         "commodities",
         "contacts",
         "evaluations",
         "financialinfo",
         "interests",
         "licenses",
         "performanceratings",
         "profisydocuments",
         "profisyfolders",
         "projectinterests",
         "projects",
         "qualifications",
         "relationships",
         "shopload"
      ]
   },
   {  
      "api_module":"costcodes",
      "api_resource_name":[  

      ]
   },
   {  
      "api_module":"currencies",
      "api_resource_name":[  
         "rates"
      ]
   },
   {  
      "api_module":"dataexchangenew",
      "api_resource_name":[  

      ]
   }
]

Posted 28-Dec-17 21:22pm

Member 10271709

Updated 7-Jan-18 6:17am

v2

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Maciej Los · Answer 1 · 2018-01-07T06:17:00

As MSDN documentation states a DataTableExtensions.AsEnumerable Method (DataTable) (System.Data)[^] is available since .NET framework 3.5.

Note that conversion between datatable data and JSON data isnt't accessible directly. You have to define set of classes to be able to serialize and deserialize JSON data (strongly recommended). For further details, please see:
JSON Serialization | Microsoft Docs[^]
How to: Serialize and Deserialize JSON Data | Microsoft Docs[^]

Also, please see:
Convert datatable to json in C#[^]
3 Ways to Convert DataTable to JSON String in ASP.NET C#[^]

Member 13194803 · Answer 2 · 2019-08-15T13:18:00

Solution 2

For .Net core, AsEnumerable() is only available from version 3.0 Preview 8 and on.

Posted 15-Aug-19 13:18pm

Member 13194803

Updated 15-Aug-19 18:37pm