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DxGrid.AutoExpandAllGroupRows Property
Specifies whether to expand all group rows automatically when the grid loads data or users interact with the grid.
Namespace : DevExpress.Blazor
Assembly :
DevExpress.Blazor.v24.2.dll
NuGet Package :
DevExpress.Blazor
# Declaration
# Property Value
Type
Default
Description
Boolean
false
true
to expand all group rows; otherwise, false
.
@using Microsoft.EntityFrameworkCore
@inject IDbContextFactory<NorthwindContext> NorthwindContextFactory
@ implements IDisposable
<DxGrid Data ="GridDataSource"
ShowGroupPanel ="true"
AutoExpandAllGroupRows ="true"
CustomizeCellDisplayText ="OnCustomizeCellDisplayText" >
<Columns >
<DxGridDataColumn FieldName ="OrderDate"
DisplayFormat ="d"
GroupIndex ="0"
GroupInterval ="GridColumnGroupInterval.DateMonth" />
<DxGridDataColumn FieldName ="Customer"
SortMode ="GridColumnSortMode.DisplayText"
GroupInterval ="GridColumnGroupInterval.DisplayText" />
<DxGridDataColumn FieldName ="Freight"
DisplayFormat ="n2" />
</Columns >
</DxGrid >
@ code {
object GridDataSource { get ; set ; }
NorthwindContext Northwind { get ; set ; }
protected override void OnInitialized ( ) {
Northwind = NorthwindContextFactory.CreateDbContext();
GridDataSource = Northwind.Orders
.Include(i => i.Customer)
.Include(i => i.OrderDetails)
.Include(i => i.ShipViaNavigation)
.ToList();
}
void OnCustomizeCellDisplayText (GridCustomizeCellDisplayTextEventArgs e ) {
if (e.FieldName == "Customer" ) {
var customer = (Customer)e.Value;
e.DisplayText = $"{customer.CompanyName} ({customer.Country} , {customer.City} )" ;
}
}
public void Dispose ( ) {
Northwind?.Dispose();
}
}
using Microsoft.EntityFrameworkCore ;
#nullable disable
namespace Grid.Northwind {
public partial class NorthwindContext : DbContext {
public NorthwindContext (DbContextOptions<NorthwindContext> options )
: base (options ) {
}
public virtual DbSet<Category> Categories { get ; set ; }
public virtual DbSet<Customer> Customers { get ; set ; }
public virtual DbSet<Invoice> Invoices { get ; set ; }
public virtual DbSet<Order> Orders { get ; set ; }
public virtual DbSet<OrderDetail> OrderDetails { get ; set ; }
public virtual DbSet<Product> Products { get ; set ; }
public virtual DbSet<Shipper> Shippers { get ; set ; }
public virtual DbSet<Supplier> Suppliers { get ; set ; }
public virtual DbSet<Employee> Employees { 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.HasAnnotation("Relational:Collation" , "SQL_Latin1_General_CP1_CI_AS" );
modelBuilder.Entity<Category>(entity => {
entity.HasIndex(e => e.CategoryName, "CategoryName" );
entity.Property(e => e.CategoryId).HasColumnName("CategoryID" );
entity.Property(e => e.CategoryName)
.IsRequired()
.HasMaxLength(15 );
entity.Property(e => e.Description).HasColumnType("ntext" );
entity.Property(e => e.Picture).HasColumnType("image" );
});
modelBuilder.Entity<Customer>(entity => {
entity.HasIndex(e => e.City, "City" );
entity.HasIndex(e => e.CompanyName, "CompanyName" );
entity.HasIndex(e => e.PostalCode, "PostalCode" );
entity.HasIndex(e => e.Region, "Region" );
entity.Property(e => e.CustomerId)
.HasMaxLength(5 )
.HasColumnName("CustomerID" )
.IsFixedLength(true );
entity.Property(e => e.Address).HasMaxLength(60 );
entity.Property(e => e.City).HasMaxLength(15 );
entity.Property(e => e.CompanyName)
.IsRequired()
.HasMaxLength(40 );
entity.Property(e => e.ContactName).HasMaxLength(30 );
entity.Property(e => e.ContactTitle).HasMaxLength(30 );
entity.Property(e => e.Country).HasMaxLength(15 );
entity.Property(e => e.Fax).HasMaxLength(24 );
entity.Property(e => e.Phone).HasMaxLength(24 );
entity.Property(e => e.PostalCode).HasMaxLength(10 );
entity.Property(e => e.Region).HasMaxLength(15 );
});
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" );
});
modelBuilder.Entity<Order>(entity => {
entity.HasIndex(e => e.CustomerId, "CustomerID" );
entity.HasIndex(e => e.CustomerId, "CustomersOrders" );
entity.HasIndex(e => e.EmployeeId, "EmployeeID" );
entity.HasIndex(e => e.EmployeeId, "EmployeesOrders" );
entity.HasIndex(e => e.OrderDate, "OrderDate" );
entity.HasIndex(e => e.ShipPostalCode, "ShipPostalCode" );
entity.HasIndex(e => e.ShippedDate, "ShippedDate" );
entity.HasIndex(e => e.ShipVia, "ShippersOrders" );
entity.Property(e => e.OrderId).HasColumnName("OrderID" );
entity.Property(e => e.CustomerId)
.HasMaxLength(5 )
.HasColumnName("CustomerID" )
.IsFixedLength(true );
entity.Property(e => e.EmployeeId).HasColumnName("EmployeeID" );
entity.Property(e => e.Freight)
.HasColumnType("money" )
.HasDefaultValueSql("((0))" );
entity.Property(e => e.OrderDate).HasColumnType("datetime" );
entity.Property(e => e.RequiredDate).HasColumnType("datetime" );
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.HasOne(d => d.Customer)
.WithMany(p => p.Orders)
.HasForeignKey(d => d.CustomerId)
.HasConstraintName("FK_Orders_Customers" );
entity.HasOne(d => d.ShipViaNavigation)
.WithMany(p => p.Orders)
.HasForeignKey(d => d.ShipVia)
.HasConstraintName("FK_Orders_Shippers" );
});
modelBuilder.Entity<OrderDetail>(entity => {
entity.HasKey(e => new { e.OrderId, e.ProductId })
.HasName("PK_Order_Details" );
entity.ToTable("Order Details" );
entity.HasIndex(e => e.OrderId, "OrderID" );
entity.HasIndex(e => e.OrderId, "OrdersOrder_Details" );
entity.HasIndex(e => e.ProductId, "ProductID" );
entity.HasIndex(e => e.ProductId, "ProductsOrder_Details" );
entity.Property(e => e.OrderId).HasColumnName("OrderID" );
entity.Property(e => e.ProductId).HasColumnName("ProductID" );
entity.Property(e => e.Quantity).HasDefaultValueSql("((1))" );
entity.Property(e => e.UnitPrice).HasColumnType("money" );
entity.HasOne(d => d.Order)
.WithMany(p => p.OrderDetails)
.HasForeignKey(d => d.OrderId)
.OnDelete(DeleteBehavior.ClientSetNull)
.HasConstraintName("FK_Order_Details_Orders" );
entity.HasOne(d => d.Product)
.WithMany(p => p.OrderDetails)
.HasForeignKey(d => d.ProductId)
.OnDelete(DeleteBehavior.ClientSetNull)
.HasConstraintName("FK_Order_Details_Products" );
});
modelBuilder.Entity<Product>(entity => {
entity.HasIndex(e => e.CategoryId, "CategoriesProducts" );
entity.HasIndex(e => e.CategoryId, "CategoryID" );
entity.HasIndex(e => e.ProductName, "ProductName" );
entity.HasIndex(e => e.SupplierId, "SupplierID" );
entity.HasIndex(e => e.SupplierId, "SuppliersProducts" );
entity.Property(e => e.ProductId).HasColumnName("ProductID" );
entity.Property(e => e.CategoryId).HasColumnName("CategoryID" );
entity.Property(e => e.ProductName)
.IsRequired()
.HasMaxLength(40 );
entity.Property(e => e.QuantityPerUnit).HasMaxLength(20 );
entity.Property(e => e.ReorderLevel).HasDefaultValueSql("((0))" );
entity.Property(e => e.SupplierId).HasColumnName("SupplierID" );
entity.Property(e => e.UnitPrice)
.HasColumnType("money" )
.HasDefaultValueSql("((0))" );
entity.Property(e => e.UnitsInStock).HasDefaultValueSql("((0))" );
entity.Property(e => e.UnitsOnOrder).HasDefaultValueSql("((0))" );
entity.HasOne(d => d.Category)
.WithMany(p => p.Products)
.HasForeignKey(d => d.CategoryId)
.HasConstraintName("FK_Products_Categories" );
entity.HasOne(d => d.Supplier)
.WithMany(p => p.Products)
.HasForeignKey(d => d.SupplierId)
.HasConstraintName("FK_Products_Suppliers" );
});
modelBuilder.Entity<Shipper>(entity => {
entity.Property(e => e.ShipperId).HasColumnName("ShipperID" );
entity.Property(e => e.CompanyName)
.IsRequired()
.HasMaxLength(40 );
entity.Property(e => e.Phone).HasMaxLength(24 );
});
modelBuilder.Entity<Supplier>(entity => {
entity.HasIndex(e => e.CompanyName, "CompanyName" );
entity.HasIndex(e => e.PostalCode, "PostalCode" );
entity.Property(e => e.SupplierId).HasColumnName("SupplierID" );
entity.Property(e => e.Address).HasMaxLength(60 );
entity.Property(e => e.City).HasMaxLength(15 );
entity.Property(e => e.CompanyName)
.IsRequired()
.HasMaxLength(40 );
entity.Property(e => e.ContactName).HasMaxLength(30 );
entity.Property(e => e.ContactTitle).HasMaxLength(30 );
entity.Property(e => e.Country).HasMaxLength(15 );
entity.Property(e => e.Fax).HasMaxLength(24 );
entity.Property(e => e.HomePage).HasColumnType("ntext" );
entity.Property(e => e.Phone).HasMaxLength(24 );
entity.Property(e => e.PostalCode).HasMaxLength(10 );
entity.Property(e => e.Region).HasMaxLength(15 );
});
modelBuilder.Entity<Employee>(entity => {
entity.HasIndex(e => e.EmployeeId, "EmployeeId" );
entity.HasIndex(e => e.LastName, "LastName" );
entity.HasIndex(e => e.FirstName, "FirstName" );
entity.HasIndex(e => e.Title, "Title" );
entity.HasIndex(e => e.BirthDate, "BirthDate" );
entity.HasIndex(e => e.HireDate, "HireDate" );
entity.HasIndex(e => e.Notes, "Notes" );
});
OnModelCreatingPartial(modelBuilder);
}
partial void OnModelCreatingPartial (ModelBuilder modelBuilder ) ;
}
}
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);
});
Note
If a bound data collection is large, the ‘expand all group rows’ operation can cause performance issues and UI freezes.
For more information about data grouping in the Grid component, refer to the following topic: Group Data in Blazor Grid .
See Also