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title | author | description | monikerRange | ms.author | ms.custom | ms.date | uid |
---|---|---|---|---|---|---|---|
ASP.NET Core Blazor QuickGrid component | guardrex | The QuickGrid component is a Razor component for quickly and efficiently displaying data in tabular form. | >= aspnetcore-7.0 | riande | mvc | 02/09/2024 | blazor/components/quickgrid |
ASP.NET Core Blazor QuickGrid
component
:::moniker range=">= aspnetcore-8.0"
The QuickGrid
component is a Razor component for quickly and efficiently displaying data in tabular form. QuickGrid
provides a simple and convenient data grid component for common grid rendering scenarios and serves as a reference architecture and performance baseline for building data grid components. QuickGrid
is highly optimized and uses advanced techniques to achieve optimal rendering performance.
Package
Add a package reference for the Microsoft.AspNetCore.Components.QuickGrid
package.
Sample app
For various QuickGrid
demonstrations, see the QuickGrid for Blazor sample app. The demo site is hosted on GitHub Pages. The site loads fast thanks to static prerendering using the community-maintained BlazorWasmPrerendering.Build
GitHub project.
QuickGrid
implementation
To implement a QuickGrid
component:
- Specify tags for the
QuickGrid
component in Razor markup (<QuickGrid>...</QuickGrid>
). - Name a queryable source of data for the grid. Use either of the following data sources:
- xref:Microsoft.AspNetCore.Components.QuickGrid.QuickGrid%601.Items%2A: A nullable
IQueryable<TGridItem>
, whereTGridItem
is the type of data represented by each row in the grid. - xref:Microsoft.AspNetCore.Components.QuickGrid.QuickGrid%601.ItemsProvider%2A: A callback that supplies data for the grid.
- xref:Microsoft.AspNetCore.Components.QuickGrid.QuickGrid%601.Items%2A: A nullable
- xref:Microsoft.AspNetCore.Components.QuickGrid.QuickGrid%601.Class%2A: An optional CSS class name. If provided, the class name is included in the
class
attribute of the rendered table. - xref:Microsoft.AspNetCore.Components.QuickGrid.QuickGrid%601.Theme%2A: A theme name (default value:
default
). This affects which styling rules match the table. - xref:Microsoft.AspNetCore.Components.QuickGrid.QuickGrid%601.Virtualize%2A: If true, the grid is rendered with virtualization. This is normally used in conjunction with scrolling and causes the grid to fetch and render only the data around the current scroll viewport. This can greatly improve the performance when scrolling through large data sets. If you use xref:Microsoft.AspNetCore.Components.QuickGrid.QuickGrid%601.Virtualize%2A, you should supply a value for xref:Microsoft.AspNetCore.Components.QuickGrid.QuickGrid%601.ItemSize%2A and must ensure that every row renders with a constant height. Generally, it's preferable not to use xref:Microsoft.AspNetCore.Components.QuickGrid.QuickGrid%601.Virtualize%2A if the amount of data rendered is small or if you're using pagination.
- xref:Microsoft.AspNetCore.Components.QuickGrid.QuickGrid%601.ItemSize%2A: Only applicable when using xref:Microsoft.AspNetCore.Components.QuickGrid.QuickGrid%601.Virtualize%2A. xref:Microsoft.AspNetCore.Components.QuickGrid.QuickGrid%601.ItemSize%2A defines an expected height in pixels for each row, allowing the virtualization mechanism to fetch the correct number of items to match the display size and to ensure accurate scrolling.
- xref:Microsoft.AspNetCore.Components.QuickGrid.QuickGrid%601.ItemKey%2A: Optionally defines a value for
@key
on each rendered row. Typically, this is used to specify a unique identifier, such as a primary key value, for each data item. This allows the grid to preserve the association between row elements and data items based on their unique identifiers, even when theTGridItem
instances are replaced by new copies (for example, after a new query against the underlying data store). If not set, the@key
is theTGridItem
instance. - xref:Microsoft.AspNetCore.Components.QuickGrid.QuickGrid%601.Pagination%2A: Optionally links this
TGridItem
instance with a xref:Microsoft.AspNetCore.Components.QuickGrid.PaginationState model, causing the grid to fetch and render only the current page of data. This is normally used in conjunction with a xref:Microsoft.AspNetCore.Components.QuickGrid.Paginator component or some other UI logic that displays and updates the supplied xref:Microsoft.AspNetCore.Components.QuickGrid.PaginationState instance. - In the
QuickGrid
child content (xref:Microsoft.AspNetCore.Components.RenderFragment), specify xref:Microsoft.AspNetCore.Components.QuickGrid.PropertyColumn`2s, which representTGridItem
columns whose cells display values:- xref:Microsoft.AspNetCore.Components.QuickGrid.PropertyColumn%602.Property%2A: Defines the value to be displayed in this column's cells.
- xref:Microsoft.AspNetCore.Components.QuickGrid.PropertyColumn%602.Format%2A: Optionally specifies a format string for the value. Using xref:Microsoft.AspNetCore.Components.QuickGrid.PropertyColumn%602.Format%2A requires the
TProp
type to implement xref:System.IFormattable. - xref:Microsoft.AspNetCore.Components.QuickGrid.ColumnBase%601.Sortable%2A: Indicates whether the data should be sortable by this column. The default value may vary according to the column type. For example, a xref:Microsoft.AspNetCore.Components.QuickGrid.TemplateColumn%601 is sortable by default if any xref:Microsoft.AspNetCore.Components.QuickGrid.TemplateColumn%601.SortBy%2A parameter is specified.
- xref:Microsoft.AspNetCore.Components.QuickGrid.ColumnBase%601.InitialSortDirection%2A: Indicates the sort direction if xref:Microsoft.AspNetCore.Components.QuickGrid.ColumnBase%601.IsDefaultSortColumn%2A is
true
. - xref:Microsoft.AspNetCore.Components.QuickGrid.ColumnBase%601.IsDefaultSortColumn%2A: Indicates whether this column should be sorted by default.
- xref:Microsoft.AspNetCore.Components.QuickGrid.ColumnBase%601.PlaceholderTemplate%2A: If specified, virtualized grids use this template to render cells whose data hasn't been loaded.
For example, add the following component to render a grid.
The component assumes that the Interactive Server render mode (InteractiveServer
) is inherited from a parent component or applied globally to the app, which enables interactive features. For the following example, the only interactive feature is sortable columns.
PromotionGrid.razor
:
:::code language="razor" source="~/../blazor-samples/8.0/BlazorSample_BlazorWebApp/Components/Pages/PromotionGrid.razor":::
For an example that uses an xref:System.Linq.IQueryable with Entity Framework Core as the queryable data source, see the SampleQuickGridComponent
component in the ASP.NET Core Basic Test App (dotnet/aspnetcore
GitHub repository).
To use Entity Framework (EF) Core as the data source:
-
Add a package reference for the
Microsoft.AspNetCore.Components.QuickGrid.EntityFrameworkAdapter
package. -
Call
AddQuickGridEntityFrameworkAdapter
on the service collection in theProgram
file to register an EF-aware xref:Microsoft.AspNetCore.Components.QuickGrid.IAsyncQueryExecutor implementation:builder.Services.AddQuickGridEntityFrameworkAdapter();
QuickGrid supports passing custom attributes to the rendered table element:
<QuickGrid Items="..." custom-attribute="somevalue" class="custom-class">
:::moniker-end
:::moniker range="< aspnetcore-8.0"
The QuickGrid
component is an experimental Razor component for quickly and efficiently displaying data in tabular form. QuickGrid
provides a simple and convenient data grid component for common grid rendering scenarios and serves as a reference architecture and performance baseline for building data grid components. QuickGrid
is highly optimized and uses advanced techniques to achieve optimal rendering performance.
To get started with QuickGrid
:
Add a prerelease package reference for the Microsoft.AspNetCore.Components.QuickGrid
package. If using the .NET CLI to add the package reference, include the --prerelease
option when you execute the dotnet add package
command.
[!NOTE] Because the
Microsoft.AspNetCore.Components.QuickGrid
package is an experimental package for .NET 7, the package remains in prerelease status forever for .NET 7 Blazor apps. The package reached production status for .NET 8 or later. For more information, see an 8.0 or later version of this article.
Add the following component to render a grid.
PromotionGrid.razor
:
@page "/promotion-grid"
@using Microsoft.AspNetCore.Components.QuickGrid
<QuickGrid Items="people">
<PropertyColumn Property="@(p => p.PersonId)" Sortable="true" />
<PropertyColumn Property="@(p => p.Name)" Sortable="true" />
<PropertyColumn Property="@(p => p.PromotionDate)" Format="yyyy-MM-dd" Sortable="true" />
</QuickGrid>
@code {
private record Person(int PersonId, string Name, DateOnly PromotionDate);
private IQueryable<Person> people = new[]
{
new Person(10895, "Jean Martin", new DateOnly(1985, 3, 16)),
new Person(10944, "António Langa", new DateOnly(1991, 12, 1)),
new Person(11203, "Julie Smith", new DateOnly(1958, 10, 10)),
new Person(11205, "Nur Sari", new DateOnly(1922, 4, 27)),
new Person(11898, "Jose Hernandez", new DateOnly(2011, 5, 3)),
new Person(12130, "Kenji Sato", new DateOnly(2004, 1, 9)),
}.AsQueryable();
}
:::moniker-end
Access the component in a browser at the relative path /promotion-grid
.
There aren't current plans to extend QuickGrid
with features that full-blown commercial grids tend to offer, for example, hierarchical rows, drag-to-reorder columns, or Excel-like range selections. If you require advanced features that you don't wish to develop on your own, continue using third-party grids.
QuickGrid
scaffolder
The QuickGrid
scaffolder in Visual Studio scaffolds Razor components with QuickGrid
to display data from a database.
To use the scaffolder, right-click the project in Solution Explorer and select Add > New Scaffolded Item. Open Installed > Common > Razor Component. Select Razor Components using Entity Framework (CRUD).
The scaffolder generates basic Create, Read, Update, and Delete (CRUD) pages based on an Entity Framework Core data model. You can scaffold individual pages or all of the CRUD pages. You select the model class and the DbContext
, optionally creating a new DbContext
if needed.
The scaffolded Razor components are added to the project's Pages
folder in a generated folder named after the model class. The generated Index
component uses QuickGrid
to display the data. Customize the generated components as needed and enable interactivity to take advantage of interactive features, such as sorting and filtering.
The components produced by the scaffolder require server-side rendering (SSR), so they aren't supported when running on WebAssembly.