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dxTreeList AIColumnRequestCreatingEvent

Reference
The argument type in the aIColumnRequestCreating event.

DataGrid Demo TreeList Demo additionalInfo Additional data to include in the request. Use this object to specify additional data required by AI endpoints. For example, you can add metadata and query parameters. cancel Allows you to cancel the AI request. column The AI column that initiated the request. component The UI component's instance. data TreeList data included in the AI request

Errors and Warnings

Reference
This section lists errors and warnings that may occur when using the DevExtreme Data Library.

that a value can be found for any key passed to the byKey(key) function. E4010 Occurs when creating the Query object by using the createQuery method of a CustomStore. This error is specific

ArrayStore Methods

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This section describes methods that control the ArrayStore.

(props); store.clear(); } // ... } export default App; createQuery() Creates a Query for the underlying array. jQuery JavaScript var store = new DevExpress.data.ArrayStore({ // ArrayStore is configured here }); var query = store.createQuery(); Angular TypeScript import ArrayStore from "devextreme/data/array_store"; import DevExpress from "devextreme/bundles/dx.all

LocalStore Methods

Reference
This section describes methods that control the LocalStore.

a Query for the underlying array. jQuery JavaScript var store = new DevExpress.data.ArrayStore({ // ArrayStore is configured here }); var query = store.createQuery(); Angular TypeScript import ArrayStore from "devextreme/data/array_store"; import DevExpress from "devextreme/bundles/dx.all"; // ... export class AppComponent { store: ArrayStore; query: DevExpress.data.Query

dxFileManager contextMenu

Reference
Configures the context menu settings.

and optional settings ('visible', 'beginGroup', 'text', 'icon', 'disabled') to the items array. jQuery JavaScript $(function () { $("#file-manager").dxFileManager({ contextMenu... { name: "download", text: "Download a File" }, { name: "refresh", beginGroup: true