Data Model Editor

Value Editors

Here you can find the full list of editors and choose any you need in your work with Data Model:

About Data Model Editor

Here you can find detailed information about this instrument and guideline, how to use it to perform all needed tasks.

Data Model

In short (and by its name), data model - is a model (representation) of some data stored in your database. It solves two major problems: Presents the data to the end user in a more friendly and familiar way. Contains some meta information that helps EasyQuery components to build query statements in SQL or other query languages. Any data model contains the following main sections:

Introduction to value editors

For example, value editor allows you to define a list of available values - so your users will be able to select the value from a drop-down list. "Custom list" value editor raises an event which can be processed either on the client-side or on the server. All other editions of EasyQuery (WinForms, WebForms, WPF or Silverlight) has ListRequest event in QueryPanel control which is raised when a user adds an attribute (or operator) with Custom List or SQL list value editor assigned to that attribute/operator. Here we show how you can filter the returned list according to the value specified for some other attribute. If such condition is defined - we get the value (country code) from it and use that value as a filter for the list of regions.

API reference

Setup custom value editor — WinForms

Here you can find all steps you need to perfom

Processing custom value editors in EasyQuery JS

Here you can find tips how to value editor setup and how to value editor widget

Processing custom value editors in EasyQuery JS

First, of you will need to assign a custom (user-defined) value editor for some attribute or operator in your data model. You have to ways to do it: Run Data Model Editor (DME). Select an entity attribute which you want to assign custom value editor to. You can add a custom editor to any entity attribute in your model at run-time. Here is an example of very simple value editor in TypeScript.

Korzh.EasyQuery namespace

Korzh.EasyQuery namespace

Korzh.EasyQuery.Db namespace

Korzh.EasyQuery.Db namespace

Korzh.EasyQuery namespace

Korzh.EasyQuery.Db namespace

Korzh.EasyQuery namespace

Korzh.EasyQuery

Basic classes of EasyQuery library.

How to setup SQL LIST value editor in WinForms app

Step-by-step instruction how to setup SQL LIST value editor.

API reference 4.x (obsolete)

API reference 5.x (obsolete)