DataStoreDataExtensions.ImportJsonByKey(this IDataStoreBase dataStore, string text, DwBuffer dwuffer, int startRow) Method

.NET Standard 2.x

Inserts data from a JSON string into the specified buffer of DataStore according to the key name of the JSON item. You can specify the starting position in the JSON array.

Namespace: DWNet.Data

Assembly: DWNet.Data.dll

Syntax

  public static int ImportJsonByKey(this IDataStoreBase dataStore, string text, DwBuffer dwbuffer, int startRow);

Parameters

text System.String

A string specifying the JSON data.

The JSON string must comply with the plain-format JSON or DataWindow JSON.

dwbuffer DWNet.Data.DwBuffer

The specified buffer of the DataStore.

A value of the DwBuffer enumerated datatype identifying the DataWindow buffer into which you want to import the data.

For plain-format JSON: Imports the JSON data to the specified buffer.

For DataWindow JSON: Imports data from the specified buffer from the JSON string to the corresponding buffer.

startRow System.Int32

The zero-based number of the first row in the JSON array that you want to import. If it is negative, 0 is used.

Returns

System.Int32

Returns the number of rows that were imported if it succeeds.

Examples

The following code example demonstrates how to import the department data starting from the specified row of a JSON string to the specified DataStore buffer.

using DWNet.Data;
using System;
using System.IO;

namespace Appeon.ApiDoc.DataStoreDataExtensionsExamples
{
    public class ImportJsonByKeyExample
    {
        private readonly SchoolContext _context;

        public ImportJsonByKeyExample(SchoolContext dataContext)
        {
            // Sets the data context
            _context = dataContext;
        }

        public void Example3()
        {
            // Instantiates the datastore with datawindow: d_department
            var datastore = new DataStore("d_department", _context);

            // Gets the JSON file. ImportJson8.json contains 4 records.
            string path = Path.Combine(AppContext.BaseDirectory,
                                @"Jsons\IDatastore\ImportJson8.json");
            string json = File.ReadAllText(path);

            // Imports data from JSON to the DataStore primary buffer
            // Imports data starting from the first row
            datastore.ImportJsonByKey(json, DwBuffer.Primary, 0);

            Console.WriteLine("Rowcount:{0}", datastore.RowCount);

            datastore.Reset();

            // Imports data starting from the second row
            datastore.ImportJsonByKey(json, DwBuffer.Primary, 1);

            Console.WriteLine("Rowcount: {0}", datastore.RowCount);

            /*This code produces the following output:

            Rowcount: 4
            Rowcount: 3
           */
        }
    }
}

Example Refer To

Model Class: D_Department
JSON File: ImportJson8
DataWindow File: d_department

Applies to

.NET Standard

2.x