Migrate from Data Grid to Grid

Jun 25, 2024
23 minutes to read

Why Are There Two Grid Components?

We released a new Grid component to replace the Data Grid component.

Important

The Data Grid was moved to maintenance support mode. No new features/capabilities will be added to this component.

Feature Comparison

The following table compares the two components. Note that we continue to add functionality to the new component. We plan to replicate all the functionality available in the older control.

Bind to Data	New Grid	Data Grid
Bind to Data Synchronously
Bind to Data Asynchronously
Large Datasets
Large Datasets from an HTTP Service
Unbound Columns
Columns	New Grid	Data Grid
Data Columns
Command Column
Reorder Columns
Resize Columns
Fit Column Widths to Their Content
Column Chooser
Edit Data	New Grid	Data Grid
Edit Data
Validate Input
Shape Data	New Grid	Data Grid
Sort Data by Value
Sort Data by Display Text
Custom Sorting
Group Data
Interval Grouping
Custom Grouping
Total and Group Summary
Custom Total and Group Summary
Filter Row
Search Box
Filter Menu
Batch Modifications
Selection and Navigation	New Grid	Data Grid
Row Selection
Paging
Vertical Scrolling
Horizontal Scrolling
Fixed Columns
Virtual Scrolling
Handle a Row Click
Appearance	New Grid	Data Grid
Theme Support
Custom Display Text
Grid Header Template
Column Header Caption Template
Column Cell Display Template
Column Footer Template
Column Group Row Template
Column Group Footer Template
Empty Data Area Template
Row Preview
HTML Decoration
Hierarchy and Layout	New Grid	Data Grid
Master-Detail
Save and Load Layout
Tools	New Grid	Data Grid
Toolbar
Export	New Grid	Data Grid
Export
Keyboard Support	New Grid	Data Grid
Keyboard Support

Component Name

Update the component name from DxDataGrid to DxGrid.

Data Grid

<DxDataGrid>
    @*...*@
</DxDataGrid>

New Grid

<DxGrid>
    @*...*@
</DxGrid>

Bind to Data Synchronously

You do not need to update your code if you bind the Data Grid to a data collection available during synchronous component initialization. The Data Grid includes the DxDataGrid.Data property for synchronous data binding. The new Grid contains the property with the same name: DxGrid.Data.

Data Grid

<DxDataGrid Data="@Data">
    @*...*@
</DxDataGrid>

@code {
    IEnumerable<WeatherForecast> Data;
    // ...

    protected override void OnInitialized() {
        Data = GetForecast();
    }
}

New Grid

<DxGrid Data="@Data">
    @*...*@
</DxGrid>

@code {
    IEnumerable<WeatherForecast> Data;
    // ...

    protected override void OnInitialized() {
        Data = GetForecast();
    }
}

Bind to Data Asynchronously

Data Grid

The Data Grid includes the DxDataGrid.DataAsync property for asynchronous data binding. This property specifies an asynchronous function that returns a Task<IEnumerable<T>> object and accepts a CancellationToken object as a parameter.

Data Grid

@using System.Threading

<DxDataGrid DataAsync="@LoadDataAsync">
    @*...*@
</DxDataGrid>

@code {
    async Task<IEnumerable<WeatherForecast>> LoadDataAsync(CancellationToken token) {
        return await WeatherForecastService.GetForecastAsync();
    }
}

Grid

The new Grid has no equivalent for the DataAsync property, but you can use the DxGrid.Data parameter instead.

Bind the Data parameter to a model field or property.
Initialize this field or property with data in the OnInitializeAsync lifecycle method (use the await operator).

New Grid

<DxGrid Data="@Data">
    @*...*@
</DxGrid>

@code {
    object Data { get; set; }

    protected override async Task OnInitializedAsync() {
        Data = await WeatherForecastService.GetForecastAsync();
    }
}

Large Datasets

Data Grid

The Data Grid can detect an IQueryable collection when you use data binding properties (DxDataGrid.Data, DxDataGrid.DataAsync, or DxDataGrid.CustomData). The Data Grid uses benefits of the corresponding LINQ query providers (such as Entity Framework).

Grid

The Grid supports the following data source types designed to work with large data collections:

Server Mode Data Sources (Blazor Server only)

When you use these data sources, the Grid loads data in small portions on demand (instead of the entire dataset). This helps reduce memory consumption. All data shaping operations are delegated to underlying services (such as EF Core, XPO, and so on). These services process operations more efficiently and enhance overall performance.

The Grid includes synchronous Server Mode Data Sources (they lock the UI while data is retrieved) and asynchronous Instant Feedback Sources (they load data in a background thread and do not freeze the UI).

Data Access Technology	Server Mode Data Source	Instant Feedback Data Source
Entity Framework Core	EntityServerModeSource	EntityInstantFeedbackSource
XPO	XPServerCollectionSource XPServerModeView	XPInstantFeedbackSource XPInstantFeedbackView
Parallel LINQ	PLinqServerModeSource	PLinqInstantFeedbackSource
OData	ODataServerModeSource	ODataInstantFeedbackSource

For more information and examples, refer to the following help topic: Large Data (Server Mode Sources).

GridDevExtremeDataSource (Blazor Server and Blazor WebAssembly)

This data source allows you to bind the Grid to a large IQueryable data collection. The data source implementation is based on the DevExpress DevExtreme.AspNet.Data library.

When you use this data source, the Grid delegates data processing operations to an underlying query provider (such as LINQ to Objects, EF Core, and so on). The Grid loads only data required for the screen display. This helps enhance overall performance and application responsiveness, and reduces memory consumption.

For more information and examples, refer to the following help topic: Large Data (Queryable Collections).

Large Datasets from HTTP Services

Data Grid

To bind the Data Grid to a large dataset published as an HTTP service, do the following:

Create an asynchronous DxDataGrid.CustomData delegate that processes data load options and sends HTTP requests to the specified URI.
On the service side, implement an API controller and create action methods that use the DevExtreme.AspNet.Data library to return the result.

Data Grid

<DxDataGrid T="@WebApiOrder" CustomData="@LoadOrderData">
    @*...*@
</DxDataGrid>

@code {
    [Inject] protected HttpClient Client { get; set; }

    protected async Task<LoadResult> LoadOrderData(DataSourceLoadOptionsBase options, 
                    CancellationToken cancellationToken)
        => await LoadCustomData("https://js.devexpress.com/Demos/NetCore/api/DataGridWebApi/Orders", 
                    options, cancellationToken);

    protected async Task<LoadResult> LoadCustomData(string dataEndpointUri,     
                    DataSourceLoadOptionsBase options, CancellationToken cancellationToken) {
        using var response = await Client.GetAsync(options.ConvertToGetRequestUri(dataEndpointUri), 
                            cancellationToken);
        response.EnsureSuccessStatusCode();
        using var responseStream = await response.Content.ReadAsStreamAsync();
        return await JsonSerializer.DeserializeAsync<LoadResult>(responseStream, 
                    cancellationToken: cancellationToken);
    }
}

Grid

When you migrate to the Grid, you do not need to change the API controller on the service side.

To load data from this service, use the GridDevExtremeDataSource<T> as follows:

Create a GridDevExtremeDataSource class instance and pass a URL to the service as the constructor parameter.
Bind this instance to the DxGrid.Data parameter.

For more information, refer to the following help topic: Queryable Collections as HTTP Services.

New Grid

<DxGrid Data="@Data">
    @*...*@
</DxGrid>

@code {
    [Inject] protected HttpClient Client { get; set; }

    object Data { get; set; }

    protected override async Task OnInitializedAsync() {
        Data = new GridDevExtremeDataSource<WebApiOrder>(HttpClient, 
            "https://js.devexpress.com/Demos/NetCore/api/DataGridWebApi/Orders");
    }
}

Columns

Declaration

Data Grid

You can specify columns directly between the <DxDataGrid> and </DxDataGrid> tags. If you define templates (for instance, EditFormTemplate or DetailRowTemplate), you should use the DxDataGrid.Columns property to add columns.

Data Grid

<DxDataGrid Data="@Data">
    <DxDataGridColumn ... /> 
    <DxDataGridSpinEditColumn ... />
    @*...*@
</DxDataGrid>

Grid

Always use the DxGrid.Columns property to declare columns.

New Grid

<DxGrid Data="@Data">
    <Columns>
        <DxGridDataColumn ... />
        <DxGridDataColumn ... />
        @*...*@
    </Columns>
</DxGrid>

Column Types

The Data Grid ships with multiple predefined data column types that correspond to commonly used data types. The new Grid includes a single class for all data types (DxGridDataColumn).

Both the Data Grid and new Grid support a command column and selection column.

The following table explains how to update columns when you migrate to the new Grid:

Data Grid	New Grid
DxDataGridColumn	Use the DxGridDataColumn instead.
DxDataGridDateEditColumn	Use the DxGridDataColumn instead.
DxDataGridSpinEditColumn	Use the DxGridDataColumn instead.
DxDataGridComboBoxColumn<T>	Use the DxGridDataColumn instead. Make sure that its editor is a combo box. Refer to the following topic for more information: Change a Column Editor to Combo Box.
DxDataGridCheckBoxColumn	Use the DxGridDataColumn instead. Make sure that its editor is a checkbox. Refer to the following topic for more information: Change a Column Editor to Checkbox.
DxDataGridCommandColumn	Use the DxGridCommandColumn instead.
DxDataGridSelectionColumn	Use the DxGridSelectionColumn instead.

Main Column Properties

The table below maps column properties available in the Data Grid and Grid components.

Data Grid	New Grid
Field	FieldName
Caption	Caption
Width	Width
DisplayFormat	DisplayFormat or CustomizeCellDisplayText event
TextAlignment	TextAlignment
Visible	Visible
VisibleIndex	VisibleIndex
DisplayTemplate	CellDisplayTemplate
ShowInColumnChooser	ShowInColumnChooser
Editing-related properties	-
Sorting-related properties	See Sort Data
Grouping-related properties	See Group Data

Data Grid

<DxDataGrid Data="@Data">
    <DxDataGridCommandColumn />
    <DxDataGridSelectionColumn />
    <DxDataGridDateEditColumn Field="Date" DisplayFormat="D" />
    <DxDataGridSpinEditColumn Field="TemperatureC" Caption="@("Temp. (\x2103)")" Width="120px"
                              TextAlignment="DataGridTextAlign.Left" />
    @*...*@
</DxDataGrid>

New Grid

<DxGrid Data="@Data">
    <Columns>
        <DxGridCommandColumn />
        <DxGridSelectionColumn />
        <DxGridDataColumn FieldName="Date" DisplayFormat="D" />
        <DxGridDataColumn FieldName="TemperatureC" Caption="@("Temp. (\x2103)")" Width="120px"
                          TextAlignment="GridTextAlignment.Left" />
        @*...*@
    </Columns>
</DxGrid>

Resize Columns

Data Grid

Use the ColumnResizeMode property to specify whether and how users can resize Data Grid columns. The DataGridColumnResizeMode enumeration lists all supported resize modes.

Data Grid

<DxDataGrid DataAsync="@CustomersService.Load"
            ...
            ColumnResizeMode="DataGridColumnResizeMode.NextColumn">
    @*...*@
</DxDataGrid>

Grid

Use the ColumnResizeMode property to specify whether and how users can resize Grid columns. The GridColumnResizeMode enumeration lists all supported resize modes.

New Grid

<DxGrid Data="@Data"
        ...
        ColumnResizeMode="GridColumnResizeMode.NextColumn">
    @*...*@
</DxGrid>

Call the AutoFitColumnWidths() method to adjust column widths to their content (that is, cell content of visible columns, headers, and summaries).

Column Chooser

Both the Data Grid and new Grid can display the Column Chooser, which allows users to show, hide, and reorder columns.

Data Grid

The Column Chooser displays only data columns. Command and selection columns are not listed.

You can add the Column Chooser to the Data Grid’s toolbar:

Add HeaderTemplate to the Data Grid’s markup.
Add the DxDataGridColumnChooserToolbarItem item to the Toolbar component in this template.

Data Grid

<DxDataGrid Data="@Data">
    <HeaderTemplate>
        <DxToolbar>
            <DxDataGridColumnChooserToolbarItem Alignment="ToolbarItemAlignment.Right" />
        </DxToolbar>
    </HeaderTemplate>
    <Columns>
        @*...*@
    </Columns>
</DxDataGrid>

Grid

The Column Chooser displays data, command, and selection columns.

You can invoke the Column Chooser from any place in a .razor file. To do this, use the ShowColumnChooser(String) method.

New Grid

<DxButton Text="Column Chooser"
          RenderStyle="ButtonRenderStyle.Secondary"
          CssClass="column-chooser-button"
          Click="OnClick" />

<DxGrid Data="@Data" @ref="Grid">
    <Columns>
        @*...*@
    </Columns>
</DxGrid>

@code {
    // ...

    DxGrid Grid { get; set; }

    void OnClick() {
        Grid.ShowColumnChooser(".column-chooser-button");
    }
}

Sort Data

The Data Grid and new Grid include similar sorting-related API. You only need to replace the DataGridColumnSortOrder enumeration with the GridColumnSortOrder enumeration for the SortOrder property.

Data Grid	New Grid
DxDataGrid.AllowSort	DxGrid.AllowSort
DxDataGridColumn.AllowSort	DxGridDataColumn.AllowSort
DxDataGridColumn.SortIndex	DxGridDataColumn.SortIndex
DxDataGridColumn.SortOrder (Accepts DataGridColumnSortOrder enum values)	DxGridDataColumn.SortOrder (Accepts GridColumnSortOrder enum values)

Data Grid

<DxDataGrid Data="@Data" AllowSort="false">
    <DxDataGridDateEditColumn Field="Date" DisplayFormat="D" 
                              AllowSort="true"
                              SortOrder="DataGridColumnSortOrder.Descending" 
                              SortIndex="0" />
    @*...*@
</DxDataGrid>

New Grid

<DxGrid Data="@Data" AllowSort="false">
    <Columns>
        <DxGridDataColumn FieldName="Date" DisplayFormat="D" 
                          AllowSort="true"
                          SortOrder="GridColumnSortOrder.Descending" 
                          SortIndex="0" />
        @*...*@
    </Columns>
</DxGrid>

Group Data

If you disable grouping in the entire Grid, replace the DxDataGrid.AllowColumnDragDrop property with the DxGrid.AllowGroup property. Use other grouping-related API without changes.

Data Grid	New Grid
DxDataGrid.AllowColumnDragDrop	DxGrid.AllowGroup
DxDataGridColumn.AllowGroup	DxGridDataColumn.AllowGroup
DxDataGridColumn.GroupIndex	DxGridDataColumn.GroupIndex
DxDataGrid.ShowGroupPanel	DxGrid.ShowGroupPanel
DxDataGrid.ShowGroupedColumns	DxGrid.ShowGroupedColumns

Data Grid

<DxDataGrid Data="@Data" 
            AllowColumnDragDrop="false" 
            ShowGroupPanel="true">
    <DxDataGridDateEditColumn Field="Date" DisplayFormat="D" 
                              AllowGroup="true"
                              GroupIndex="0" />
    @*...*@
</DxDataGrid>

New Grid

<DxGrid Data="@Data" 
        AllowGroup="false"
        ShowGroupPanel="true">
    <Columns>
        <DxGridDataColumn FieldName="Date" DisplayFormat="D" 
                          AllowGroup="true"
                          GroupIndex="0" />
            @*...*@
    </Columns>
</DxGrid>

Edit Data

Edit Modes

The Data Grid and new Grid allow users to edit data in edit and pop-up edit forms. The new Grid also includes extra modes: inline edit row and cell editing.

Each component includes the option that specifies the current edit mode: DxDataGrid`1.EditMode and DxGrid.EditMode. When you migrate to the new Grid, replace the DataGridEditMode enumeration with the GridEditMode enumeration. Values of these enumerations are the same: EditForm (default value) and PopupEditForm.

Data Grid

<DxDataGrid Data="@Data" 
            EditMode="DataGridEditMode.PopupEditForm">
    @*...*@
</DxDataGrid>

New Grid

<DxGrid Data="@Data" 
        EditMode="GridEditMode.PopupEditForm">
    @*...*@
</DxGrid>

Enable Editing

Data Grid

To enable data editing in the Data Grid, do the following:

Add DxDataGridCommandColumn to display the predefined New, Edit, and Delete command buttons. To hide unnecessary buttons, use the NewButtonVisible, EditButtonVisible, and DeleteButtonVisible properties.
Handle the following events to post changes to an underlying data source:
- RowInserting / RowInsertingAsync - Fires when a user adds a new row. The event handler accepts a dictionary that lists field names and field values. Once the event handler is processed, the edit form is closed.
- RowUpdating / RowUpdatingAsync - Fires when a user updates a row. The event handler accepts a data item that should be updated and a dictionary that lists field names and new field values. Once the event handler is processed, the edit form is closed.
- RowRemoving / RowRemovingAsync - Fires when a user deletes a row. The event handler accepts a data item that should be deleted.
Specify the key data field to enable the Data Grid to identify individual data items.

The Data Grid displays the predefined edit form that consists of data editors for each visible column. The editor type depends on the corresponding column’s type. You can disable a column’s EditorVisible property to hide an editor from the edit form. To customize a column’s editor, define the EditTemplate.

Data Grid

<DxDataGrid Data="@Data"
            RowRemovingAsync="@OnRowRemoving"
            RowUpdatingAsync="@OnRowUpdating"
            RowInsertingAsync="@OnRowInserting"
            KeyFieldName="Id">
    <DxDataGridCommandColumn />
    @*...*@
</DxDataGrid>

@code {
    // ...

    Task OnRowRemoving(Supplier dataItem) {
        await NwindDataService.RemoveEmployeeAsync(dataItem);
        await UpdateDataAsync();
    }
    Task OnRowUpdating(Supplier dataItem, IDictionary<string, object> newValues) {
        await NwindDataService.UpdateEmployeeAsync(dataItem, newValues);
        await UpdateDataAsync();
    }
    Task OnRowInserting(IDictionary<string, object> newValues) {
        await NwindDataService.InsertEmployeeAsync(newValues);
        await UpdateDataAsync();
    }
}

Grid

To enable data editing in the new Grid, do the following:

Like for the Data Grid, add DxGridCommandColumn to display the predefined New, Edit, and Delete command buttons. To hide unnecessary buttons, use the NewButtonVisible, EditButtonVisible, and DeleteButtonVisible properties.
Use the EditFormTemplate to define the edit form content. The Grid creates an edit model based on a bound data item. Use the template’s context parameter to access this edit model.

The default edit form shows only the predefined Save and Cancel buttons. You can disable the EditFormButtonsVisible option to hide these buttons and implement custom buttons.
Handle the following events to post changes to an underlying data source:
- EditModelSaving - Fires when a user adds a new row or edits an existing row. Use the event argument’s EditModel property to access the edit model that stores all changes. The DataItem property specifies an actual data item. The IsNew property defines whether the edit model corresponds to a new or existing row.
  
  Once the event handler is processed, the edit form is closed. If you do not save changes to the data source and want to keep the edit form opened, set the event argument’s Cancel property to true.
- DataItemDeleting - Fires when a user deletes a row. The event argument’s DataItem property specifies the data item that should be removed.
If your data object has a primary key, assign it to the KeyFieldName or KeyFieldNames property. The Grid uses field values to compare and identify data items. If you do not specify these properties, the Grid uses standard .NET value equality comparison to identify data items.

For detailed information on how to enable data editing and use edit-related options, refer to the following topic: Editing and Validation in Blazor Grid.

New Grid

<DxGrid Data="@Data"
        EditModelSaving="OnEditModelSaving"
        DataItemDeleting="OnDataItemDeleting"
        KeyFieldName="Id">
    <Columns>
        <DxGridCommandColumn />
            @*...*@
    </Columns>
    <EditFormTemplate Context="EditFormContext">
        @{
            var employee = (EditableEmployee)EditFormContext.EditModel;
        }
        <DxFormLayout CssClass="w-100">
            <DxFormLayoutItem Caption="First Name:" ColSpanMd="6">
                <DxTextBox @bind-Text="@employee.FirstName" />
            </DxFormLayoutItem>
            <DxFormLayoutItem Caption="Last Name:" ColSpanMd="6">
                <DxTextBox @bind-Text="@employee.LastName" />
            </DxFormLayoutItem>
            @*...*@
        </DxFormLayout>
    </EditFormTemplate>
</DxGrid>

@code {
    // ...
    async Task OnEditModelSaving(GridEditModelSavingEventArgs e) {
        if(e.IsNew)
            await NwindDataService.InsertEmployeeAsync((EditableEmployee)e.EditModel);
        else
            await NwindDataService.UpdateEmployeeAsync((EditableEmployee)e.DataItem, (EditableEmployee)e.EditModel);
        await UpdateDataAsync();
    }
    async Task OnDataItemDeleting(GridDataItemDeletingEventArgs e) {
        await NwindDataService.RemoveEmployeeAsync((EditableEmployee)e.DataItem);
        await UpdateDataAsync();
    }
}

Validation

Data Grid

The Data Grid allows you to validate user input based on data annotation attributes. To do this, define the EditFormTemplate to create a custom edit form and use Blazor’s standard EditForm component inside this template as described in this topic.

Grid

The new Grid validates user input automatically based on data annotation attributes. To disable validation, set the ValidationEnabled property to false.

The following table describes how to update events and methods related to the edit function when you migrate to the new Grid:

Data Grid (Events)	New Grid (Events)
InitNewRow	CustomizeEditModel
RowEditStart RowEditStartAsync RowInsertStart RowInsertStartAsync	EditStart
RowEditCancel RowEditCancelAsync	EditCanceling
Data Grid (Methods)	New Grid (Methods)
CancelRowEdit	CancelEditAsync
StartRowEdit	StartEditRowAsync StartEditNewRowAsync StartEditDataItemAsync

Filter Row

Data Grid

To display the filter row in the Data Grid, enable the DxDataGrid.ShowFilterRow option. The filter row displays different in-place editors based on the column types. For more information, refer to the ShowFilterRow property description.

To prevent users from filtering data by individual columns, set their AllowFilter property to false.

<DxDataGrid Data="@DataSource"
            ShowFilterRow="true">
    @*...*@
    <DxDataGridDateEditColumn Field="Date" DisplayFormat="D" />
    <DxGridDataColumn Field="TemperatureC" Caption="@("Temp. (\x2103)")" Width="120px" 
                      AllowFilter="false"/>
    @*...*@
</DxDataGrid>

Grid

To display the filter row in the new Grid, enable the property with the same name: DxGrid.ShowFilterRow. The filter row displays a predefined text editor for all data columns. To display a custom editor in the filter row cell, define the FilterRowCellTemplate.

To prevent users from filtering data by individual columns, set their FilterRowEditorVisible property to false.

<DxGrid Data="@DataSource"
        ShowFilterRow="true">
    <Columns>
        <DxGridDataColumn FieldName="Date" DisplayFormat="D">
            <FilterRowCellTemplate>
                <DxDateEdit Date="(DateTime?)context.FilterRowValue"
                            DateChanged="(DateTime? v) => context.FilterRowValue = v"
                            ClearButtonDisplayMode="DataEditorClearButtonDisplayMode.Auto" />
            </FilterRowCellTemplate>
        </DxGridDataColumn>
        <DxGridDataColumn FieldName="TemperatureC" Caption="@("Temp. (\x2103)")" Width="120px" 
                          FilterRowEditorVisible="false"/>
        @*...*@
    </Columns>
    @*...*@
</DxGrid>

Summary

The new Grid, like the Data Grid, includes the TotalSummary and GroupSummary properties used to add summary items. You should replace DxDataGridSummaryItem objects with DxGridSummaryItem objects, and update item properties as shown in the table below.

Data Grid	New Grid
DxDataGrid.TotalSummary	DxGrid.TotalSummary
DxDataGrid.GroupSummary	DxGrid.GroupSummary

DxDataGridSummaryItem	DxGridSummaryItem
SummaryType (Accepts SummaryItemType enum values)	SummaryType (Accepts GridSummaryItemType enum values)
Field	FieldName
ShowInColumn	FooterColumnName
DisplayFormat	ValueDisplayFormat and DisplayText properties
Visible	-
Alignment	-
GroupSummaryPosition	FooterColumnName

Data Grid

<DxDataGrid Data="@Data" >
    @*...*@
    <TotalSummary>
        <DxDataGridSummaryItem Field="Date"
                               SummaryType=SummaryItemType.Min
                               DisplayFormat="First: {0:D}"/>
        <DxDataGridSummaryItem ShowInColumn="TemperatureC"
                               SummaryType=SummaryItemType.Count/>
    </TotalSummary>
</DxDataGrid>

New Grid

<DxGrid Data="@Data" >
    @*...*@
    <TotalSummary>
        <DxGridSummaryItem FieldName="Date"
                           SummaryType=GridSummaryItemType.Min
                           ValueDisplayFormat="D"/>
        <DxGridSummaryItem FooterColumnName="TemperatureC"
                           SummaryType=GridSummaryItemType.Count/>
    </TotalSummary>
</DxGrid>

Row Selection

Both the Data Grid and the new Grid support single and multiple row selection. They allow users to select rows by mouse clicks and/or in the selection column.

However, these components have different API members and default behavior as described below.

Data Grid

The Data Grid contains the SelectionMode property that accepts DataGridSelectionMode enumeration values:

SingleSelectedDataRow (Default Value)
MultipleSelectedDataRows
OptimizedMultipleSelection

Users can click rows to select them. To disable row selection, set the SelectionMode property to DataGridSelectionMode.None.

To access data items that correspond to the selected row(s), use the SingleSelectedDataRow or MultipleSelectedDataRows property depending on selection mode.

To display the selection column, declare a DxDataGridSelectionColumn object between the <DxDataGrid> and </DxDataGrid> tags or in the Columns template (see the Declaration section).

Data Grid

<DxDataGrid Data="@Data"
            SelectionMode="DataGridSelectionMode.MultipleSelectedDataRows"
            @bind-MultipleSelectedDataRows="@SelectedDataItems">
    <DxDataGridSelectionColumn />
    @*...*@
</DxDataGrid>

@code {
    IEnumerable<object> Data { get; set; };
    IReadOnlyList<object> SelectedDataItems { get; set; };
    // ...
}

Grid

The new Grid also includes the SelectionMode property, but it accepts the following GridSelectionMode enumeration values:

Single - Use it instead of SingleSelectedDataRow.
Multiple (Default Value) - Use it instead of MultipleSelectedDataRows and OptimizedMultipleSelection.

The AllowSelectRowByClick property specifies whether users can select rows by mouse clicks, tap gestures, and keyboard shortcuts. The default property value is false. To enable row selection, set this property to true.

To access data items that correspond to the selected row(s), use the SelectedDataItem or SelectedDataItems property depending on selection mode.

To display the selection column, declare a DxGridSelectionColumn object in the Columns template.

New Grid

<DxGrid Data="@Data"
        SelectionMode="GridSelectionMode.Multiple"
        AllowSelectRowByClick="true"
        @bind-SelectedDataItems="@SelectedDataItems">
    <Columns>
        <DxGridSelectionColumn />
        @*...*@
    </Columns>
</DxGrid>

@code {
    IEnumerable<object> Data { get; set; }
    IReadOnlyList<object> SelectedDataItems { get; set; }
    // ...
}

Paging

Both the Data Grid and new Grid can display a pager to enable data navigation. These components also support the page size selector.

The following table maps paging properties that are available in the Data Grid and Grid components:

Data Grid	New Grid
PageSize	PageSize
PageIndex	PageIndex
PagerNavigationMode	PagerNavigationMode
PagerSwitchToInputBoxButtonCount	PagerSwitchToInputBoxButtonCount
PagerVisibleNumericButtonCount	PagerVisibleNumericButtonCount
PagerAutoHideNavButtons	PagerAutoHideNavButtons
ShowPager	PagerVisible
PagerPageSizeSelectorVisible	PageSizeSelectorVisible
PagerAllowedPageSizes	PageSizeSelectorItems
PagerAllDataRowsItemVisible	PageSizeSelectorAllRowsItemVisible
PageCount	-

Data Grid

<DxDataGrid Data="@Data" 
            PageSize="7"
            PagerNavigationMode="PagerNavigationMode.InputBox"
            PagerPageSizeSelectorVisible="true"
            PagerAllowedPageSizes="@(new int[] { 2, 10, 20, 40 })"
            PagerAllDataRowsItemVisible="true">
    @*...*@
</DxDataGrid>

New Grid

<DxGrid Data="@Data" 
        PageSize="7"
        PagerNavigationMode="PagerNavigationMode.InputBox"
        PageSizeSelectorVisible="true"
        PageSizeSelectorItems="@(new int[] { 2, 10, 20, 40 })"
        PageSizeSelectorAllRowsItemVisible="true">
    @*...*@
</DxGrid>

Templates

Column Display Template

Data Grid

Use a column’s DisplayTemplate property. The Context parameter returns a processed data item.

Data Grid

<DxDataGrid Data="@Data">
    <DxDataGridColumn Field="Date">
        <DisplayTemplate>
            var inStock = (context as Product).Availability;
            @*...*@
        </DisplayTemplate>
    </DxDataGridColumn>
    @*...*@
</DxDataGrid>

Grid

Use the DxGridDataColumn.CellDisplayTemplate property. The Context parameter returns a GridDataColumnCellDisplayTemplateContext object. To obtain a processed data item, use the parameter’s DataItem property.

New Grid

<DxGrid Data="@Data" >
    <Columns>
        <DxGridDataColumn FieldName="Date">
            <CellDisplayTemplate>
                var inStock = (context.DataItem as Product).Availability;
                @*...*@
            </CellDisplayTemplate>
        </DxGridDataColumn>
    </Columns>
    @*...*@
</DxGrid>

Other Templates

The Data Grid also allows you to specify a column’s EditTemplate. In the new Grid, you should define the entire edit form template. Refer to the Edit Data section for more information.

The new Grid has no alternative for the DxDataGrid.RowPreviewTemplate supported in the Data Grid.

Row Preview

Data Grid

Specify the RowPreviewTemplate property to show preview sections under each data row across all columns. Use properties of the template’s context parameter to access the following information:

RowIndex - A zero-based row index.
DataItem - A data item that corresponds to the row.

Data Grid

<DxDataGrid Data="@Data">
    <Columns>
        @* ... *@
    <Columns>
    <RowPreviewTemplate Context="ItemInfo">
        @{
            Employee employee = ItemInfo.DataItem;
            <div class="d-flex align-items-start p-1">
                <img src="@(StaticAssetUtils.GetImagePath(employee.ImageFileName))" width="76" />
                <div class="ps-2 text-wrap">@employee.Notes</div>
            </div>
        }
    </RowPreviewTemplate>
</DxDataGrid>

Grid

Set the DetailRowDisplayMode property to GridDetailRowDisplayMode.Always and specify the DetailRowTemplate property to show preview sections under each data row across all columns.

Use properties of the template’s context parameter to access the following information:

DataItem - A data item that corresponds to the row.
Grid - The Grid object.

New Grid

<DxGrid Data="GridData"
        DetailRowDisplayMode="GridDetailRowDisplayMode.Always">
    <Columns>
        @* ... *@
    </Columns>
    <DetailRowTemplate>
        @{
            var employee = (Employee)context.DataItem;
            <text>@employee.Notes</text>
        }
    </DetailRowTemplate>
</DxGrid>

HTML Decoration

Data Grid

Handle the HtmlRowDecoration and HtmlDataCellDecoration events to color a row or cell, respectively. Use the event arguments (CssClass, Attributes, Style) to customize an element’s appearance.

Data Grid

<DxDataGrid Data="@Data"
            HtmlRowDecoration="@OnHtmlRowDecoration"
            HtmlDataCellDecoration="@OnHtmlDataCellDecoration">
    <Columns>
        <DxDataGridColumn Field="@nameof(Invoice.OrderId)" />
        @* ... *@
    <Columns>
</DxDataGrid>

@code {
    void OnHtmlRowDecoration(DataGridHtmlRowDecorationEventArgs<Invoice> eventArgs) {
       if(eventArgs.VisibleIndex % 2 == 1)
            eventArgs.CssClass = " table-dark"; 
    }

    void OnHtmlDataCellDecoration(DataGridHtmlDataCellDecorationEventArgs<Invoice> eventArgs) {
        if(eventArgs.DataItem.Quantity > largeOrder) {
            eventArgs.CssClass += " font-weight-bold";
        }
    }
}

Grid

Handle the common CustomizeElement event to customize Grid elements. Use the event’s ElementType argument to identify a target element’s type.

To customize element appearance, use event arguments with the same names as in the Data Grid (CssClass, Attributes, Style).

New Grid

<DxGrid Data="@Data"
        CustomizeElement="Grid_CustomizeElement">
    <Columns>
        <DxDataGridColumn Field="@nameof(Invoice.OrderId)" />
        @* ... *@
    <Columns>
</DxGrid>

@code {
    void Grid_CustomizeElement(GridCustomizeElementEventArgs e) {
        if(e.ElementType == GridElementType.DataRow) {
           e.CssClass = " table-dark"; 
        }

        if (e.Grid.GetDataItem(e.VisibleIndex).Quantity > largeOrder) {
            e.CssClass += " font-weight-bold";
        }

    }
}

Master-Detail View

Data Grid

Follow the steps below to create hierarchical layouts in the Data Grid:

Add a master grid to your application.
Bind the master grid to data and enable its ShowDetailRow property to display detail rows.
Add the master grid’s columns to the Columns collection.
Add the DetailRowTemplate template to the grid’s markup to create the detail view. Specify the template’s context parameter to access data item properties.
Add the second data grid to the template. Bind the grid to a detail data source that uses the template’s context object as a filter criteria.
Specify the KeyFieldName property to enable the grid to identify individual data items.

Data Grid

<DxDataGrid @ref="@grid"
            Data="@DataSource"
            KeyFieldName="@nameof(Customer.CustomerId)"
            ShowDetailRow="true">
    <Columns>
        <DxDataGridColumn Field="@nameof(Customer.ContactName)" />
        @* ... *@
    </Columns>
    <DetailRowTemplate Context="dataItem">
        <DxTabs>
            <DxTabPage Text="Invoices">
                @* ... *@
            </DxTabPage>
            <DxTabPage Text="Contact Info">
                @* ... *@
            </DxTabPage>
        </DxTabs>
    </DetailRowTemplate>
</DxDataGrid>

@code {
    IEnumerable<Customer> DataSource;
    DxDataGrid<Customer> grid;

    protected override async Task OnInitializedAsync() {
        DataSource = await NwindDataService.GetCustomersAsync();
    }
}

Grid

Follow the steps below to create hierarchical layouts in the Grid:

Add a master grid to your application.
Bind the master grid to data and add columns to its Columns collection.
Add the DetailRowTemplate to the grid’s markup to create a detail view.
Optional. We recommend that you allocate the detail grid to a separate component. Separation improves the application structure and prevents excessive component redraw operations.
Add a second data grid to the template. Bind this grid to a detail data source that uses the template’s context object as a filter criteria.

New Grid

@inject NwindDataService NwindDataService

<DxGrid @ref="Grid" 
        Data="MasterGridData">
    <Columns>
        @* ... *@
    </Columns>
    <DetailRowTemplate>
        <Grid_MasterDetail_NestedGrid_DetailContent Customer="(Customer)context.DataItem" />
    </DetailRowTemplate>
</DxGrid>

@code {
    IGrid Grid { get; set; }
    object MasterGridData { get; set; }

    protected override async Task OnInitializedAsync() {
        var invoices = await NwindDataService.GetInvoicesAsync();
        DetailGridData = invoices
            .Where(i => i.CustomerId == Customer.CustomerId)
            .ToArray();
    }
}

Save and Load Layout

Data Grid

Use the SaveLayout() and LoadLayout(String) methods to save/restore the Data Grid layout on demand. Both methods return and accept the layout object as a JSON string.

You can also handle the following save/restore layout events:

LayoutChanged - Fires when a user changes a grid’s layout.
LayoutRestoring - Fires when a grid has been initialized and you can restore its layout (if needed).

Data Grid

<DxDataGrid ...
    LayoutRestoring="@OnLayoutRestoring"
    LayoutChanged="@OnLayoutChanged">
</DxDataGrid>

@code {
     void OnLayoutChanged(IDataGridLayout dataGridLayout) {
        var layout = dataGridLayout.SaveLayout();
        SaveLayoutToLocalStorage(e.Layout); // Persist the layout in your storage
    }

    void OnLayoutRestoring(IDataGridLayout dataGridLayout) {
        var layout = LoadLayoutFromLocalStorage() ; // Restore layout from your storage
        dataGridLayout.LoadLayout(layout);
    }
}

Grid

Use the SaveLayout() and LoadLayout(GridPersistentLayout) methods to save/restore the Grid layout on demand. Both methods return and accept the layout object as a GridPersistentLayout instance.

You can also handle the following save/restore events to keep the layout persistence:

LayoutAutoSaving - Fires when a user changes a grid’s layout.
LayoutAutoLoading - Fires when a grid has been initialized and you can restore its layout (if needed).

New Grid

 <DxGrid ...
        LayoutAutoLoading="Grid_LayoutAutoLoading"
        LayoutAutoSaving="Grid_LayoutAutoSaving">
</DxGrid>

@code {
     async Task Grid_LayoutAutoLoading(GridPersistentLayoutEventArgs e) {
        e.Layout = await LoadLayoutFromLocalStorageAsync(); // Restore layout from your storage
    }

    async Task Grid_LayoutAutoSaving(GridPersistentLayoutEventArgs e) {
        await SaveLayoutToLocalStorageAsync(e.Layout); // Persist the layout in your storage
    }
}

Tools

Both Grids allow you to incorporate a toolbar to perform data shaping operations from the UI. Replace the HeaderTemplate with the ToolbarTemplate and use the toolbar without changes:

Data Grid

<DxDataGrid ...>
    <HeaderTemplate>
        <DxToolbar>
            <DxToolbarItem Text="New" IconCssClass="grid-toolbar-new" />
            <DxToolbarItem Text="Edit" IconCssClass="grid-toolbar-edit" />
            <DxToolbarItem Text="Delete" IconCssClass="grid-toolbar-delete" />
            <DxToolbarItem Text="Show Filter Row" IconCssClass="grid-toolbar-filter-row" />
            <DxToolbarItem Text="Examples" IconCssClass="grid-toolbar-document" />
        </DxToolbar>
    </HeaderTemplate>
    @* ... *@
</DxDataGrid>

New Grid

<DxGrid ...>
    <ToolbarTemplate>
        <DxToolbar>
            <DxToolbarItem Text="New" IconCssClass="grid-toolbar-new" />
            <DxToolbarItem Text="Edit" IconCssClass="grid-toolbar-edit" />
            <DxToolbarItem Text="Delete" IconCssClass="grid-toolbar-delete" />
            <DxToolbarItem Text="Show Filter Row" IconCssClass="grid-toolbar-filter-row" />
            <DxToolbarItem Text="Examples" IconCssClass="grid-toolbar-document" />
        </DxToolbar>
    </ToolbarTemplate>
    @* ... *@
</DxGrid>

Why Are There Two Grid Components?

Feature Comparison

Component Name

Bind to Data Synchronously

Bind to Data Asynchronously

Data Grid

Grid

Large Datasets

Data Grid

Grid

Large Datasets from HTTP Services

Data Grid

Grid

Columns

Declaration

Data Grid

Grid

Column Types

Main Column Properties

Resize Columns

Data Grid

Grid

Column Chooser

Data Grid

Grid

Sort Data

Group Data

Edit Data

Edit Modes

Enable Editing

Data Grid

Grid

Validation

Data Grid

Grid

Other Editing-Related API

Filter Row

Data Grid

Grid

Summary

Row Selection

Data Grid

Grid

Paging

Vertical Scrolling

Data Grid

Grid

Horizontal Scrolling

Data Grid

Grid

Fixed Columns

Data Grid

Grid

Virtual Scrolling

Data Grid

Grid

Handle a Row Click

Data Grid

Grid

Templates

Column Display Template

Data Grid

Grid

Other Templates

Row Preview

Data Grid

Grid

HTML Decoration

Data Grid

Grid

Master-Detail View

Data Grid

Grid

Save and Load Layout

Data Grid

Grid

Tools