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The ASP.NET Core Query Builder is a rich and responsive UI for filtering large amounts of data by creating or editing conditions that can be combined with data visualization controls like DataGrid and Charts to view the filtered data. It outputs structured JSON filters that can be easily parsed to create SQL queries. It allows you to create conditions and group them using AND/OR logic.

Why choose Syncfusion ASP.NET Core Query Builder?

Data binding in ASP.NET Core Query Builder control.

Seamless data binding

Bind data seamlessly with various local and remote data sources such as JSON, OData, WCF, and RESTful web services with the help of a data manager.

Exporting option in ASP.NET Core Query Builder.

Importing and exporting

You can import or export filter from or to the Query Builder in structured formats like JSON and SQL.

Responsive ASP.NET Core Query Builder.

Adapts to any resolution

Query Builder has a highly responsive layout and an optimized design for desktops, touchscreens, and smart phones. It works well on all mobile phones that use iOS, Android, or Windows OS.

Template designs in ASP.NET Core Query Builder.

Create your own template designs

You can add checkboxes, sliders, and dropdown lists to the Query Builder using three different templates options.

ASP.NET Core Query Builder with customizable themes.

Attractive, customizable themes

Cutting-edge design with several built-in themes, such as Fluent, Tailwind CSS, Bootstrap, Material, and Fabric. Utilize the online Theme Studio tool to customize themes easily.

Globalization in ASP.NET Core Query Builder.

Globalization and localization

Enables users from different locales to use the component by formatting strings to suit preferences.

ASP.NET Core Query Builder Code Example

Easily get started with ASP.NET Core Query Builder using a few simple lines of C# code, as demonstrated below. Also, explore our ASP.NET Core Query Builder Example that shows you how to render and configure the ASP.NET Core Query Builder Component.

@using Syncfusion.EJ2
@section ControlsSection{
<div class="control-section">
    <ejs-querybuilder id="querybuilder" width="70%" rule="ViewBag.rule" dataSource="ViewBag.dataSource">
            <e-querybuilder-column field="EmployeeID" label="Employee ID" type="number"></e-querybuilder-column>
            <e-querybuilder-column field="FirstName" label="First Name" type="string"></e-querybuilder-column>
            <e-querybuilder-column field="TitleOfCourtesy" label="Title Of Courtesy" type="boolean" values="ViewBag.values"></e-querybuilder-column>
            <e-querybuilder-column field="Title" label="Title" type="string"></e-querybuilder-column>
            <e-querybuilder-column field="HireDate" label="Hire Date" type="date" format="dd/MM/yyyy"></e-querybuilder-column>
            <e-querybuilder-column field="Country" label="Country" type="string"></e-querybuilder-column>
            <e-querybuilder-column field="City" label="City" type="string"></e-querybuilder-column>
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using EJ2CoreSampleBrowser.Models;
using Syncfusion.EJ2.QueryBuilder;

namespace EJ2CoreSampleBrowser.Controllers.QueryBuilder
    public partial class QueryBuilderController : Controller
        public IActionResult DefaultFunctionalities()
            QueryBuilderRule rule = new QueryBuilderRule()
                Condition = "and",
                Rules = new List<QueryBuilderRule>()
                    new QueryBuilderRule { Label="Employee ID", Field="EmployeeID", Type="number", Operator="equal", Value = 1 },
                    new QueryBuilderRule { Label="Title", Field="Title", Type="string", Operator="equal", Value = "Sales Manager" }

            List<string> values = new List<string> { "Mr.", "Mrs." };

            ViewBag.rule = rule;
            ViewBag.values = values;
            ViewBag.dataSource = EmployeeView.GetAllRecords();
            return View();

Data Manager Integration in ASP.NET Core Query Builder.

Integration with Data Manager

Integrating the Data Manager control with the Query Builder simplifies communication with a data source and returns the desired result based on the provided filters.

UI customization with templates

Add controls like Checkbox, Slider, and Dropdown List to customize the ASP.NET Core Query Builder using templates.

ASP.NET Core Query Builder with header template.

Header template

Users can define their own widgets to customize the elements such as and/or/not connectors and add rules/groups buttons using the header template.

ASP.NET Core Query Builder with column template.

Rule template

Users can define their own widgets to customize the entire column elements such as fields, operators, and values using the rule template.

ASP.NET Core Query Builder with value template.

Value template

Users can define their own widgets to customize the elements for values using the value template.

Model binding

Model binding binds properties for the components used in field, operator, and value columns. To implement model binding, assign fieldModel, operatorModel, and valueModel properties in the Query Builder.

Model binding in ASP.NET Core Query Builder.

ASP.NET Core Query Builder with summary view.

Summary view

The ASP.NET Core Query Builder supports a summary view that outputs the filter query in SQL format.

Import and export

The Query Builder supports the seamless import and export of filters in various formats, such as structured JSON, inline SQL, parameter SQL, named parameter SQL, and Mongo query formats.

ASP.NET Core Query Builder with JSON format.

JSON format

Easily convert Query Builder rules into JSON format by utilizing the setRules method to set conditions from a structured JSON object and retrieve defined conditions to a structured JSON object through the getRules method.

ASP.NET Core Query Builder with SQL.


The Query Builder supports inline SQL, parameter SQL, and named parameter SQL formats. You can import and modify predefined SQL conditions using setRulesFromSql, and export conditions back to SQL using getSqlFromRules. Additionally, you can retrieve parameterized SQL and named parameter SQL queries using getParameterizedSql and getParameterizedNamedSql and set them using setParameterizedSql and setParameterizedNamedSql.

ASP.NET Core Query Builder with Mongo.

Mongo query

Support for Mongo query is included, enabling users to retrieve or set a Mongo query using the getMongoQuery and setMongoQuery methods.

Complex data binding in ASP.NET Core Query Builder.

Complex data binding

Complex data binding allows users to create subfields within the main fields. This can be useful for representing hierarchical or multilevel data in a more organized and structured way. To create subfields, users can either specify the complex data in nested columns or specify a complex data source and separator.

Column binding

The column definitions are used as the data source schema in the Query Builder UI. This plays a vital role in rendering column values. The query builder operations, such as create or delete conditions and create or delete groups, are based on column definitions.

Column binding in ASP.NET Core Query Builder.

Filtering in ASP.NET Core Query Builder.


Users can create a filter by adding or deleting conditions or groups. Users can get a created filter as SQL query, JSON, and data manager predicates.

Appearance customization

Change the look and feel of the ASP.NET Core Query Builder UI by customizing its default appearance and style using HTML or CSS.

Appearance customization in ASP.NET Core Query Builder.

Lock in ASP.NET Core Query Builder.

Lock groups or rules

Ensure data integrity by locking groups or rules to prevent unintended interactions. Use the lockRule and lockGroup methods for this purpose.

Clone groups or rules

Effortlessly create duplicates of rules or groups within the Query Builder with the clone support feature. This creates an exact replica next to the original using the cloneRule and cloneGroup methods.

Clone in ASP.NET Core Query Builder.

Web accessibility

  • Fully supports WAI-ARIA accessibility to work with screen readers and assistive devices.
  • Follows WAI-ARIA best practices for implementing keyboard interaction.
  • Follows WCAG 2.0 standards in design of the UI element visuals such as foreground color, background color, line spacing, text, and images.
  • Supports right-to-left (RTL) text direction for users working in right-to-left languages like Hebrew, Arabic, or Persian.

Other supported frameworks

Query Builder is also available in Blazor, Angular, React, Vue, and JavaScript frameworks. Check out the different Query Builder platforms from the links below,

Supported browsers

The ASP.NET Core Query Builder works well with all modern web browsers such as Chrome, Firefox, Microsoft Edge, Safari, and Opera.

Supported browsers in ASP.NET Core Query Builder.


Frequently Asked Questions

  • Easy to integrate with data visualization components like Grid, Charts, and more.
  • Best UI experience to create filters in the form of JSON and SQL query.
  • Supports a summary view that outputs the filter query in SQL format.
  • Supports importing and exporting Query Builder data to and from structured JSON and SQL formats.
  • Fully customizable to include other components like Checkbox, Slider, and Dropdown List using templates.
  • One of the best ASP.NET Core Query Builders in the market that offers a feature-rich UI to interact with the software.
  • Simple configuration and APIs.
  • Supports all modern browsers.
  • Mobile-touch friendly and responsive.
  • Expansive learning resources such as demos and documentation to learn quickly and get started with ASP.NET Core Query Builder.

You can find our ASP.NET Core Query Builder demo, which demonstrates how to render and configure the Query Builder.

No, this is a commercial product and requires a paid license. However, a free community license is also available for companies and individuals whose organizations have less than $1 million USD in annual gross revenue, 5 or fewer developers, and 10 or fewer total employees.

A good place to start would be our comprehensive getting started documentation.

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