IQueryAndOrBuilder<TModel>.AndWhere(string left, SqlBinaryOperator sqlOperator, ISqlParameter parameter) Method

.NET Standard 2.x

Adds the AND logical operator and a search condition to the WHERE clause; and specifies a SQL expression to the left of the operator and a SQL parameter to the right of the operator.

Namespace: SnapObjects.Data

Assembly: SnapObjects.Data.dll

Syntax

  IQueryAndOrBuilder<TModel> AndWhere(string left, SqlBinaryOperator sqlOperator, ISqlParameter parameter);

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.

parameter SnapObjects.Data.ISqlParameter

An ISqlParameter object which represents a SQL parameter on the right of the operator.

It can be created by calling the SqlBuilder.Parameter method.

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 demonstrates how to use the AndWhere method to add an AND condition to the WHERE clause. In this example, the AND condition will have a dynamic value which is specified by an input parameter.

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

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

        public async Task<int> Example2()
        {
            // Get a QueryBuilder.
            var Builder = _context.SqlModelMapper.GetQueryBuilder<Person>();
            
            // adds AND condition to WHERE clause: DepartmentID > @id (a parameter)
            // and DepartmentID > @id2 (a parameter).
            Builder.Where("PersonID", SqlBinaryOperator.LessThan,
                            SqlBuilder.Parameter<int>("id"))
                   .AndWhere("PersonID", SqlBinaryOperator.GreaterThan,
                            SqlBuilder.Parameter<int>("id2"));
                            
            var result = (await Builder.LoadAsync(50, 20)).ToList();
            
            var person = result.FirstOrDefault();
            
            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);
            
            Console.WriteLine();
            Console.WriteLine("Result Count: {0}", result.Count);
            
            return result.Count;
            
            /*This code produces the following output:
            
                PersonID:    21
                FirstName:   Roger
                LastName:    Holt
                HireDate:
                Discriminator:   Student
                
                Result Count: 14
            */
        }
    }
}

Example Refer To

Model Class: Person

Applies to

.NET Standard

2.x