Returning json path in controller MVC

Question

0.00/5 (No votes)

See more:

ASP.NET

Javascript

JSON

, +

I have a stored procedure that returns a JSON path :

SQL

GO

alter PROCEDURE [dbo].[usp_getjsondata](


@type  INT

)
AS
BEGIN

SELECT
          [Time] as 'Time',
          cast([Value] as varchar(10)) as 'Value'
      FROM [dbo].[tbl_data] where type = @type
      for JSON PATH

END

In the controller i have written the following code:

C#

var json = entities.Database.SqlQuery("exec usp_getjsondata  @type",
               new SqlParameter("@type", type)
        ).ToList();

The JSON data is not being stored in the variable JSON. Am I missing something here?

What I have tried:

I tried storing the data in string or lists, but it was not working

Posted 26-Aug-17 10:11am

Member 12984363

Updated 29-Aug-17 8:42am

v2

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Richard Deeming · Answer 1 · 2017-08-29T08:42:00

FOR JSON will return a single record with a single nvarchar(max) field containing the JSON-formatted results of the query.

C#

string json = string.Concat(entities.Database.SqlQuery("exec usp_getjsondata  @type",
    new SqlParameter("@type", type)
));

If you want to convert that back to a list of objects, then you'll need to parse the JSON:

C#

var results = JsonConvert.DeserializeObject<IList<YourClass>>(json);

However, if you're doing that, then it would be better to remove the FOR JSON from the query, and load the results directly into the list:

C#

var results = entities.Database.SqlQuery<YourClass>("exec usp_getdata @type",
    new SqlParameter("@type", type)
).ToList();

Use FOR JSON output in SQL Server and in client apps (SQL Server) | Microsoft Docs[^]