DxGridSelectionColumn.CellDisplayTemplate Property
Specifies a template for selection column cells.
Namespace: DevExpress.Blazor
Assembly:
DevExpress.Blazor.v21.2.dll
NuGet Package:
DevExpress.Blazor
Declaration
[Parameter]
public RenderFragment<GridSelectionColumnCellDisplayTemplateContext> CellDisplayTemplate { get; set; }
Property Value
A selection column allows users to select and deselect rows. This column contains checkboxes or radio buttons depending on the selection mode.
You can define the CellDisplayTemplate
to display custom content in selection column cells that correspond to data rows. Use the template’s context
parameter to access the DataItem, SelectionColumn, and Grid objects. The parameter’s Selected property specifies whether the row is selected. The VisibleIndex property returns the row’s visible index.
The example below demonstrates how to display custom Select buttons in column cells and switch to single row selection mode.
@using Microsoft.EntityFrameworkCore
@inject IDbContextFactory<NorthwindContext> NorthwindContextFactory
@implements IDisposable
<DxGrid Data="GridDataSource"
SelectionMode="GridSelectionMode.Single"
@bind-SelectedDataItem="@SelectedDataItem"
KeyFieldName="ProductId"
@ref="MyGrid">
<Columns>
<DxGridSelectionColumn>
<CellDisplayTemplate >
<DxButton Click="@(() => MyGrid.SelectDataItem(context.DataItem))"
Text="Select" RenderStyle="ButtonRenderStyle.Link"/>
</CellDisplayTemplate>
</DxGridSelectionColumn>
<DxGridDataColumn FieldName="ProductName" />
<DxGridDataColumn FieldName="UnitPrice" />
<DxGridDataColumn FieldName="QuantityPerUnit" />
<DxGridDataColumn FieldName="UnitsInStock" />
</Columns>
</DxGrid>
@code {
IEnumerable<object> GridDataSource { get; set; }
NorthwindContext Northwind { get; set; }
object SelectedDataItem { get; set; }
IGrid MyGrid { get; set; }
protected override void OnInitialized() {
Northwind = NorthwindContextFactory.CreateDbContext();
GridDataSource = Northwind.Products.ToList();
SelectedDataItem = GridDataSource.FirstOrDefault();
}
public void Dispose() {
Northwind?.Dispose();
}
}
using System;
using System.Collections.Generic;
#nullable disable
namespace Grid.Northwind {
public partial class Product {
public Product() {
OrderDetails = new HashSet<OrderDetail>();
}
public int ProductId { get; set; }
public string ProductName { get; set; }
public int? SupplierId { get; set; }
public int? CategoryId { get; set; }
public string QuantityPerUnit { get; set; }
public decimal? UnitPrice { get; set; }
public short? UnitsInStock { get; set; }
public short? UnitsOnOrder { get; set; }
public short? ReorderLevel { get; set; }
public bool Discontinued { get; set; }
public virtual Category Category { get; set; }
public virtual Supplier Supplier { get; set; }
public virtual ICollection<OrderDetail> OrderDetails { 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<Product> Products { 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<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");
});
// ...
OnModelCreatingPartial(modelBuilder);
}
partial void OnModelCreatingPartial(ModelBuilder modelBuilder);
}
}
using Microsoft.EntityFrameworkCore;
// ...
public class Startup {
// ...
public void ConfigureServices(IServiceCollection services) {
// ...
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);
});
}
// ...
}
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);
});
See Also