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DxGrid.ClearSelection() Method
Namespace : DevExpress.Blazor
Assembly :
DevExpress.Blazor.v24.2.dll
NuGet Package :
DevExpress.Blazor
# Declaration
C#
public void ClearSelection ( )
Grid rows can be selected in the following ways:
Users click rows, tap rows, or execute keyboard shortcuts to select rows. To enable this functionality, set the AllowSelectRowByClick property to true
.
Users click checkboxes or radio buttons in the selection column. To display this column, declare a DxGridSelectionColumn object in the Columns template.
You call the Select*
method. Refer to the Grid’s member table for the list of available methods.
Call the ClearSelection
method to clear selection of all rows on all pages.
@using Microsoft.EntityFrameworkCore
@inject IDbContextFactory<NorthwindContext> NorthwindContextFactory
@ implements IDisposable
<DxGrid Data ="GridDataSource"
AllowSelectRowByClick ="true"
@bind-SelectedDataItems ="@ SelectedDataItems"
KeyFieldName ="ProductId"
@ref ="MyGrid" >
<Columns >
<DxGridDataColumn FieldName ="ProductName" />
<DxGridDataColumn FieldName ="UnitPrice" />
<DxGridDataColumn FieldName ="QuantityPerUnit" />
<DxGridDataColumn FieldName ="UnitsInStock" />
</Columns >
</DxGrid >
<br />
<DxButton Click ="() => MyGrid.ClearSelection()" > Clear Selection</DxButton >
@ code {
IEnumerable<object > GridDataSource { get ; set ; }
NorthwindContext Northwind { get ; set ; }
IReadOnlyList<object > SelectedDataItems { get ; set ; }
IGrid MyGrid { get ; set ; }
protected override void OnInitialized ( ) {
Northwind = NorthwindContextFactory.CreateDbContext();
GridDataSource = Northwind.Products
.ToList();
SelectedDataItems = GridDataSource.Skip(1 ).Take(2 ).ToList();
}
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 ;
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: Data Grid - Selection API
For more information about selection in the Grid component, refer to the following topic: Selection and Focus in Blazor Grid .
See Also