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DxGrid.GetGroupSummaryDisplayText(IGridSummaryItem, Int32) Method
Namespace : DevExpress.Blazor
Assembly :
DevExpress.Blazor.v24.1.dll
NuGet Package :
DevExpress.Blazor
# Declaration
C#
public string GetGroupSummaryDisplayText (
IGridSummaryItem item,
int visibleIndex
)
# Parameters
Name
Type
Description
item
IGridSummaryItem
The group summary item.
visibleIndex
Int32
The group row’s index.
# Returns
Type
Description
String
The group summary item’s display text.
Specify the DisplayText property or handle the CustomizeSummaryDisplayText event to customize the summary display text .
The following code snippet customizes group rows. These rows contain group field values and summary values that are formatted in italics.
@using Microsoft.EntityFrameworkCore
@inject IDbContextFactory<NorthwindContext> NorthwindContextFactory
@ implements IDisposable
<DxGrid Data ="@ Data"
ShowGroupPanel ="true"
CustomizeSummaryDisplayText ="Grid_CustomizeSummaryDisplayText" >
<Columns >
<DxGridDataColumn FieldName ="Country" GroupIndex ="0" Width ="200px" >
<GroupRowTemplate >
<text> @ context.DataColumn.FieldName : @ context.GroupValue</text>
@{
var summaryItems = context.Grid.GetGroupSummaryItems();
if (summaryItems.Any())
{
<text> (</text>
foreach (var i in summaryItems)
{
<i>@context.Grid.GetGroupSummaryDisplayText(i, context.VisibleIndex)</i>
}
<text>)</text>
}
}
</GroupRowTemplate >
</DxGridDataColumn >
<DxGridDataColumn FieldName ="City" />
<DxGridDataColumn FieldName ="OrderDate" Width ="200px" />
<DxGridDataColumn FieldName ="UnitPrice" DisplayFormat ="c" Width ="120px" />
<DxGridDataColumn FieldName ="Quantity" Width ="120px" />
</Columns >
<GroupSummary >
<DxGridSummaryItem SummaryType ="GridSummaryItemType.Count" FieldName ="Country" />
</GroupSummary >
</DxGrid >
@ code {
object Data { get ; set ; }
NorthwindContext Northwind { get ; set ; }
IGrid Grid1 { get ; set ; }
@* ... *@
protected override void OnInitialized ( ) {
Northwind = NorthwindContextFactory.CreateDbContext();
Data = Northwind.Invoices
.ToList();
}
void Grid_CustomizeSummaryDisplayText (GridCustomizeSummaryDisplayTextEventArgs e ) {
e.DisplayText = string .Format("Count of Orders : {0}" , e.Value);
}
public void Dispose ( ) {
Northwind?.Dispose();
}
}
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 ; }
}
}
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 ) ;
}
}
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);
});
For more information about summaries in the Grid component, refer to the following topic: Summary in Blazor Grid .
See Also