IDataStore.GetForUpdateList<TModel>(Predicate<TModel> predicate) Method

.NET Standard 2.x

Obtains an IEnumerable<TModel> object for update according to the specified condition.

Namespace: DWNet.Data

Assembly: DWNet.Data.dll

Syntax

 public IEnumerable<TModel> GetForUpdateList<TModel>(Predicate<TModel> predicate);

Parameters

predicate System.Predicate<TModel>

A Predicate<TModel> that you want to use as the search criteria.

Returns

System.Collections.Generic.IEnumerable<TModel>

Returns the IEnumerable<TModel> object which contains the data of the rows.

Remarks

It returns Empty Instance if no row is found.

Examples

The following code example demonstrates how to find the department record by Predicate<TModel> object.

using Appeon.ApiDoc.Models;
using DWNet.Data;
using System;
using System.Collections.Generic;

namespace Appeon.ApiDoc.IDataStoreExamples
{
    public class GetForUpdateListExample
    {
        private readonly SchoolContext _context;

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

        public void Example()
        {
            // Instantiates a DataStore object with datawindow: d_department.
            var datastore = new DataStore("d_department", _context);

            datastore.Retrieve();

            // There are 2 records in the Department table whose departmentid 
            // is less than 3.
            var departments = datastore.GetForUpdateList<D_Department>(x => x.Departmentid < 3);

            foreach (var item in departments)
            {
                Console.WriteLine("Department ID: {0},Department Name: {1}",
                    item.Departmentid, item.Name);
            }
            /*This code produces the following output:
             
            Department ID: 1,Department Name: Engineering
            Department ID: 2,Department Name: English
            */
        }
    }
}

Example Refer To

Model Class: D_Department
DataWindow File: d_department

Applies to

.NET Standard

2.x