DxGridCommandColumn.NewButtonVisible Property
Specifies whether the command column displays the New button.
Namespace: DevExpress.Blazor
Assembly:
DevExpress.Blazor.v22.2.dll
NuGet Package:
DevExpress.Blazor
Declaration
[DefaultValue(true)]
[Parameter]
public bool NewButtonVisible { get; set; }
Property Value
Type |
Default |
Description |
Boolean |
true |
true to display the New button; otherwise, false .
|
To display a command column in the Grid, declare a DxGridCommandColumn object in the Columns template. This column contains CRUD-related buttons (New, Edit, and Delete) and the Clear button that resets values in the filter row.
For information on how to enable data editing, refer to the following topic: Edit Data and Validate Input.
For information on how to filter data, refer to the following topic: Filter Data.
To hide unnecessary command buttons, disable the following options:
The following example hides the New and Edit command buttons:
@using Microsoft.EntityFrameworkCore
@inject IDbContextFactory<NorthwindContext> NorthwindContextFactory
@implements IDisposable
<DxGrid Data="GridDataSource"
DataItemDeleting="OnDataItemDeleting"
KeyFieldName="EmployeeId"
ShowFilterRow="true">
<Columns>
<DxGridCommandColumn NewButtonVisible="false" EditButtonVisible="false" />
<DxGridDataColumn FieldName="FirstName" />
<DxGridDataColumn FieldName="LastName" />
<DxGridDataColumn FieldName="Title" />
<DxGridDataColumn FieldName="HireDate" />
</Columns>
</DxGrid>
@code {
IEnumerable<object> GridDataSource { get; set; }
NorthwindContext Northwind { get; set; }
protected override async Task OnInitializedAsync() {
Northwind = NorthwindContextFactory.CreateDbContext();
GridDataSource = await Northwind.Employees.ToListAsync();
}
async Task OnDataItemDeleting(GridDataItemDeletingEventArgs e) {
var dataItem = Northwind.Employees.Find((e.DataItem as Employee).EmployeeId);
if (dataItem != null) {
Northwind.Remove(dataItem);
await Northwind.SaveChangesAsync();
GridDataSource = await Northwind.Employees.ToListAsync();
}
}
public void Dispose() {
Northwind?.Dispose();
}
}
using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
namespace Grid.Northwind {
public partial class Employee {
public int EmployeeId { get; set; }
[Required]
public string LastName { get; set; }
[Required]
public string FirstName { get; set; }
[Required]
public string Title { get; set; }
public string TitleOfCourtesy { get; set; }
public Nullable<System.DateTime> BirthDate { get; set; }
[Required]
[Range(typeof(DateTime), "1/1/2000", "1/1/2020",
ErrorMessage = "HireDate must be between {1:d} and {2:d}")]
public Nullable<System.DateTime> HireDate { 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 HomePhone { get; set; }
public string Extension { get; set; }
public byte[] Photo { get; set; }
public string Notes { get; set; }
public Nullable<int> ReportsTo { get; set; }
public string PhotoPath { get; set; }
public virtual ICollection<Order> Orders { get; set; }
public string Text => $"{FirstName} {LastName} ({Title})";
public string ImageFileName => $"Employees/{EmployeeId}.jpg";
}
}
using Microsoft.EntityFrameworkCore;
#nullable disable
namespace Grid.Northwind {
public partial class NorthwindContext : DbContext {
public NorthwindContext(DbContextOptions<NorthwindContext> options)
: base(options) {
}
// ...
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<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);
});
See Also