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

.NET Standard 2.x

Finds all of the rows in the specified buffer of the DataStore in which data meets the condition specified by the expression.

Namespace: DWNet.Data

Assembly: DWNet.Data.dll

Syntax

IList<TModel> FindAll(Predicate<TModel> predicate);

Parameters

predicate Predicate<TModel>

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

Returns

IList<TModel>

Returns the IList<TModel> object which contains the data for the rows found; and 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;

namespace Appeon.ApiDoc.IDataStore_GenericExamples
{
    public class FindAllExample
    {
        private readonly SchoolContext _context;

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

        public void Example1()
        {
            // Instantiates a DataStore object with datawindow: d_person_with_dwcompute.
            var datastore = new DataStore<D_Person_With_Dwcompute>(_context);

            datastore.Retrieve();

            // There are 2 records in the Department table whose departmentid 
            // is less than 3.
            var personList = datastore.FindAll(d => d.Personid < 3);

            foreach (var item in personList)
            {
                Console.WriteLine(
                    "PersonID ID: {0}; FirstName: {1}; LastName: {2}; Compute_Fullname: {3};",
                    item.Personid, item.Firstname, item.Lastname, item.Compute_Fullname);
            }

            /*This code produces the following output:
             
            PersonID ID: 1; FirstName: Kim; LastName: Abercrombie; Compute_Fullname: null;
            PersonID ID: 2; FirstName: Gytis; LastName: Barzdukas; Compute_Fullname: null;
            */
        }
    }
}

Example Refer To

Model Class: D_Person_With_Dwcompute
DataWindow File: d_person_with_dwcompute