IQueryWhereBuilder.Where(string left, SqlBinaryOperator sqlOperator, string right) Method

.NET Standard 2.x

Creates a WHERE clause, and adds a search condition to the WHERE clause. Specifies SQL expressions on both the left and right of the operator.

Namespace: SnapObjects.Data

Assembly: SnapObjects.Data.dll

Syntax

IQueryAndOrBuilder<TModel> Where(string left, SqlBinaryOperator sqlOperator, string right);

Parameters

left System.String

A SQL expression on the left of the operator.

SqlBinaryOperator SnapObjects.Data.SqlBinaryOperator

An enumeration value of SqlBinaryOperator, which is the operator to test the two expressions on the left and right.

right System.String

A SQL expression on the right of the operator.

Returns

IQueryAndOrBuilder<TModel>

Returns an IQueryAndOrBuilder<TModel> object which can be used to add more search conditions to the current WHERE clause.

Examples

The following code example uses the Where method to specify the column and the operator.

using Appeon.ApiDoc.Models.School;
using SnapObjects.Data;
using System;
using System.Threading.Tasks;

namespace Appeon.ApiDoc.IQueryWhereBuilderExamples
{
    public class WhereExample
    {
        private SchoolContext _context;
        
        public WhereExample(SchoolContext dataContext)
        {
            // Sets Data Context
            _context = dataContext;
        }

        public async Task<int> Example2()
        {
            // Get a QueryBuilder.
            var Builder = _context.SqlModelMapper.GetQueryBuilder<Person>();
            
            // Creates a WHERE clause, and adds a search condition to the WHERE clause. 
            // Specifies SQL expressions on both the left and right of the operator.
            Builder.Where("FirstName", SqlBinaryOperator.Equals, "LastName");
            
            var result = (await Builder.LoadAsync()).ToList();
            
            foreach (var person in result)
            {
                Console.WriteLine("PersonID:    {0}", person.PersonID);
                Console.WriteLine("FirstName:   {0}", person.FirstName);
                Console.WriteLine("LastName:    {0}", person.LastName);
                Console.WriteLine("HireDate:    {0}", person.HireDate);
                Console.WriteLine("Discriminator:   {0}", person.Discriminator);
            }
            
            return result.Count;
            
            /*This code produces the following output:
            
                PersonID:    3008
                FirstName:   Vico
                LastName:    Vico
                HireDate:
                Discriminator:   Student
            */
        }
    }
}

Example Refer To

Model Class: Person

Applies to

.NET Standard

2.x