IQueryWhereBuilder.WhereValue(string left, SqlBinaryOperator sqlOperator, object value) Method

.NET Standard 2.x

Creates a WHERE clause, and adds a search condition to the WHERE clause. Specifies a SQL expression on the left of the operator and a specific value on the right of the operator.

Namespace: SnapObjects.Data

Assembly: SnapObjects.Data.dll

Syntax

IQueryAndOrBuilder<TModel> WhereValue(string left, SqlBinaryOperator sqlOperator, object value)

Parameters

left System.String

An expression on the left of the operator.

SqlBinaryOperator SnapObjects.Data.SqlBinaryOperator

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

value System.Object

A specific value 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 WhereValue method to specify that data retrieved from the "Department" table must not use "Economics" as its Name value.

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

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

        public async Task<int> Example2()
        {
            // Get a QueryBuilder.
            var Builder = _context.SqlModelMapper.GetQueryBuilder<Department>();
            
            // Creates a WHERE clause, and adds a search condition to the WHERE clause. 
            // Specifies a SQL expression on the left of the operator and a specific
            // value on the right of the operator. 
            Builder.WhereValue("Name", SqlBinaryOperator.NotEquals, "Economics");
            
            var result = (await Builder.LoadAsync()).ToList();
            
            foreach (var dept in result) 
            {
                Console.WriteLine("DepartmentID:    {0}", dept.DepartmentID);
                Console.WriteLine("Name:            {0}", dept.Name);
                Console.WriteLine();
            }
            
            return result.Count;
            
            /*This code example produces the following output:   
            
                DepartmentID:    1
                Name:            Engineering
                
                DepartmentID:    2
                Name:            English
                
                DepartmentID:    7
                Name:            Mathematics
                
                DepartmentID:    10
                Name:            New Department
            */
        }
    }
}

Example Refer To

Model Class: Department

Applies to

.NET Standard

2.x