DxGridDataColumn.GroupRowTemplate Property

Specifies a template used to display group rows when the Grid is grouped by this column.

Namespace: DevExpress.Blazor

Assembly: DevExpress.Blazor.v24.2.dll

NuGet Package: DevExpress.Blazor

Declaration

[Parameter]
public RenderFragment<GridDataColumnGroupRowTemplateContext> GroupRowTemplate { get; set; }

Property Value

Type	Description
RenderFragment<GridDataColumnGroupRowTemplateContext>	The template for the column’s group rows.

Remarks

The GroupRowTemplate allows you to specify custom content and appearance for group rows when the Grid is grouped by this column. To define a common template for all group rows in the Grid, use the DxGrid.DataColumnGroupRowTemplate.

The GroupRowTemplate accepts a GridDataColumnGroupRowTemplateContext object as the context parameter. You can use the parameter’s members to get information about the current group row (for instance, GroupValue, SummaryItems, DataColumn, and so on). You can also access the Grid object and use its members to obtain additional information about the Grid.

The following code snippet customizes group rows displayed when Grid data is grouped by the Country column. Group rows contain the Country field value and summary values highlighted in bold.

Razor

@using Microsoft.EntityFrameworkCore
@inject IDbContextFactory<NorthwindContext> NorthwindContextFactory
@implements IDisposable

<DxGrid Data="@Data"
        ShowGroupPanel="true">
    <Columns>
        <DxGridDataColumn FieldName="Country" GroupIndex="0">
            <GroupRowTemplate>
                <text>@context.DataColumn.FieldName: @context.GroupValue</text>
                @{
                    var summaryItems = context.Grid.GetGroupSummaryItems();
                    if (summaryItems.Any()) {
                        <text> (</text>
                        foreach (var i in summaryItems) {
                            if (i != summaryItems.First()) {
                                <text>, </text>
                            }
                            @context.Grid.GetGroupSummaryLabel(i, context.VisibleIndex)
                            <text>: </text>
                            <b>@context.Grid.GetGroupSummaryFormattedValue(i, context.VisibleIndex)</b>
                        }
                        <text>)</text>
                    }
                }
            </GroupRowTemplate>
        </DxGridDataColumn>
        <DxGridDataColumn FieldName="City" />
        <DxGridDataColumn FieldName="OrderDate"/>
        <DxGridDataColumn FieldName="UnitPrice" DisplayFormat="c" />
        <DxGridDataColumn FieldName="Quantity" />
    </Columns>
    <GroupSummary>
        <DxGridSummaryItem SummaryType="GridSummaryItemType.Count" FieldName="Country" />
        <DxGridSummaryItem SummaryType="GridSummaryItemType.Max" FieldName="OrderDate" />
    </GroupSummary>
</DxGrid>

@code {
    object Data { get; set; }
    NorthwindContext Northwind { get; set; }

    protected override void OnInitialized() {
        Northwind = NorthwindContextFactory.CreateDbContext();
        Data = Northwind.Invoices
            .ToList();
    }

    public void Dispose() {
        Northwind?.Dispose();
    }
}

Invoice

using System;
#nullable disable

namespace Grid.Northwind {
    public partial class Invoice {
        public string ShipName { get; set; }
        public string ShipAddress { get; set; }
        public string ShipCity { get; set; }
        public string ShipRegion { get; set; }
        public string ShipPostalCode { get; set; }
        public string ShipCountry { get; set; }
        public string CustomerId { get; set; }
        public string CustomerName { get; set; }
        public string Address { get; set; }
        public string City { get; set; }
        public string Region { get; set; }
        public string PostalCode { get; set; }
        public string Country { get; set; }
        public string Salesperson { get; set; }
        public int OrderId { get; set; }
        public DateTime? OrderDate { get; set; }
        public DateTime? RequiredDate { get; set; }
        public DateTime? ShippedDate { get; set; }
        public string ShipperName { get; set; }
        public int ProductId { get; set; }
        public string ProductName { get; set; }
        public decimal UnitPrice { get; set; }
        public short Quantity { get; set; }
        public float Discount { get; set; }
        public decimal? ExtendedPrice { get; set; }
        public decimal? Freight { get; set; }
    }
}

NorthwindContext

using Microsoft.EntityFrameworkCore;
#nullable disable

namespace Grid.Northwind {
    public partial class NorthwindContext : DbContext {

        public NorthwindContext(DbContextOptions<NorthwindContext> options)
            : base(options) {
        }
        // ...
        public virtual DbSet<Invoice> Invoices { get; set; }
        // ...
        protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder) {
            if(!optionsBuilder.IsConfigured) {
                optionsBuilder.UseSqlServer("Server=.\\sqlexpress;Database=Northwind;Integrated Security=true");
            }
        }
        // ...
        protected override void OnModelCreating(ModelBuilder modelBuilder) {
        // ...
            modelBuilder.Entity<Invoice>(entity => {
                entity.HasNoKey();
                entity.ToView("Invoices");
                entity.Property(e => e.Address).HasMaxLength(60);
                entity.Property(e => e.City).HasMaxLength(15);
                entity.Property(e => e.Country).HasMaxLength(15);
                entity.Property(e => e.CustomerId)
                    .HasMaxLength(5)
                    .HasColumnName("CustomerID")
                    .IsFixedLength(true);
                entity.Property(e => e.CustomerName)
                    .IsRequired()
                    .HasMaxLength(40);
                entity.Property(e => e.ExtendedPrice).HasColumnType("money");
                entity.Property(e => e.Freight).HasColumnType("money");
                entity.Property(e => e.OrderDate).HasColumnType("datetime");
                entity.Property(e => e.OrderId).HasColumnName("OrderID");
                entity.Property(e => e.PostalCode).HasMaxLength(10);
                entity.Property(e => e.ProductId).HasColumnName("ProductID");
                entity.Property(e => e.ProductName)
                    .IsRequired()
                    .HasMaxLength(40);
                entity.Property(e => e.Region).HasMaxLength(15);
                entity.Property(e => e.RequiredDate).HasColumnType("datetime");
                entity.Property(e => e.Salesperson)
                    .IsRequired()
                    .HasMaxLength(31);
                entity.Property(e => e.ShipAddress).HasMaxLength(60);
                entity.Property(e => e.ShipCity).HasMaxLength(15);
                entity.Property(e => e.ShipCountry).HasMaxLength(15);
                entity.Property(e => e.ShipName).HasMaxLength(40);
                entity.Property(e => e.ShipPostalCode).HasMaxLength(10);
                entity.Property(e => e.ShipRegion).HasMaxLength(15);
                entity.Property(e => e.ShippedDate).HasColumnType("datetime");
                entity.Property(e => e.ShipperName)
                    .IsRequired()
                    .HasMaxLength(40);
                entity.Property(e => e.UnitPrice).HasColumnType("money");
            });
            // ...
            OnModelCreatingPartial(modelBuilder);
        }

        partial void OnModelCreatingPartial(ModelBuilder modelBuilder);
    }
}

Program.cs

using Microsoft.EntityFrameworkCore;
// ...
builder.Services.AddDbContextFactory<NorthwindContext>((sp, options) => {
    var env = sp.GetRequiredService<IWebHostEnvironment>();
    var dbPath = Path.Combine(env.ContentRootPath, "Northwind-5e44b51f.mdf");
    options.UseSqlServer("Server=(localdb)\\MSSQLLocalDB;Integrated Security=true;AttachDbFileName=" + dbPath);
});

Run Demo: Grid - Group Row Template

For more information, refer to the following topics:

• Group Data in Blazor Grid
• Templates in Blazor Grid

Implements

GroupRowTemplate