DxAccordionDataMappingBase Class

Contains the base API for classes that implement mappings in the DxAccordion component.

Assembly : DevExpress.Blazor.v25.2.dll

Declaration

csharp

public abstract class DxAccordionDataMappingBase :
    DxNavigationDataMappingBase<IAccordionDataMappingModel>

Remarks

You can populate the Accordion component with items from a data source.

Follow the steps below to bind Accordion to data:

Use the Data property to specify a data source. You can use different collection types:
Add the DataMappings tag to the component’s markup.
Create the DxAccordionDataMapping instance and map item properties (HasChildren, NavigateUrl, and so on) to data source fields. Mappings are used to assign data from the source collection to the component’s data model.

Flat Data

The following code snippet binds the Accordion to the flat collection of data items. It specifies mappings for the Text, Key, and ParentKey properties.

Razor
FlatDataItem.cs

razor

<DxAccordion Data="DataSource">
    <DataMappings>
        <DxAccordionDataMapping Text="Name"
                                Key="Id"
                                ParentKey="CategoryId" />
    </DataMappings>
</DxAccordion>

@code {
    List<FlatDataItem> DataSource { get; set; }

    protected override void OnInitialized() {
        IEnumerable<ProductFlat> products = ProductData.Products;
        IEnumerable<ProductCategory> productSubcategories = ProductData.Categories;
        DataSource = new List<FlatDataItem>(Enum.GetValues<ProductCategoryMain>().Select(i => new FlatDataItem() { Name = i.ToString(), Id = i }));
        DataSource.AddRange(products.Select(i => new FlatDataItem() { Name = i.ProductName, Id = i.Id, CategoryId = i.ProductCategoryId }));
        DataSource.AddRange(productSubcategories.Select(i => new FlatDataItem() { Name = i.Subcategory, Id = i.SubcategoryID, CategoryId = i.Category }));
    }
}

csharp

namespace BlazorDemo.Data {
    public class FlatDataItem {
        public string Name { get; set; }
        public object Id { get; set; }
        public object CategoryId { get; set; }
    }
}

Hierarchical Data

The following code snippet binds the Accordion to the collection of ChemicalElementGroup objects. Each object can have child objects. The code specifies the Children and Text mappings to adjust the Accordion’s data model to the specified data source.

Razor
ChemicalElements.cs

razor

<DxAccordion Data="@ChemicalElements.Groups">
    <DataMappings>
        <DxAccordionDataMapping Children="Groups"
                                Text="Name"/>
    </DataMappings>
</DxAccordion>

csharp

using System;
using System.Collections.Generic;

namespace BlazorDemo.Data {
    public static class ChemicalElements {
        private static readonly Lazy<List<ChemicalElementGroup>> chemicalElementGroups = new Lazy<List<ChemicalElementGroup>>(() => {
            List<ChemicalElementGroup> groups = new List<ChemicalElementGroup>() {
                new ChemicalElementGroup("Metals", new List<ChemicalElementGroup>() {
                    new ChemicalElementGroup("Alkali metals"),
                    new ChemicalElementGroup("Alkaline earth metals"),
                    new ChemicalElementGroup("Inner transition elements", new List<ChemicalElementGroup>() {
                        new ChemicalElementGroup("Lanthanides"),
                        new ChemicalElementGroup("Actinides")
                    }),
                    new ChemicalElementGroup("Transition elements"),
                    new ChemicalElementGroup("Other metals")
                }),
                new ChemicalElementGroup("Metalloids"),
                new ChemicalElementGroup("Nonmetals", new List<ChemicalElementGroup>() {
                    new ChemicalElementGroup("Halogens"),
                    new ChemicalElementGroup("Noble gases"),
                    new ChemicalElementGroup("Other nonmetals")
                })
            };
            return groups;
        });

        public static List<ChemicalElementGroup> Groups { get { return chemicalElementGroups.Value; } }
    }
}

Run Demo: Accordion - Data Binding

YouTube video

Implements

Inheritance

Object ComponentBase DxComponentBase DxModelComponent DxDataMappingBase<DevExpress.Blazor.Navigation.Internal.IAccordionDataMappingModel> DxNavigationDataMappingBase<DevExpress.Blazor.Navigation.Internal.IAccordionDataMappingModel> DxAccordionDataMappingBase DxAccordionDataMapping