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DxGrid.DetailExpandButtonDisplayMode Property
Specifies when to display master-detail expand buttons.
Namespace : DevExpress.Blazor
Assembly :
DevExpress.Blazor.v24.2.dll
NuGet Package :
DevExpress.Blazor
# Declaration
# Property Value
Available values:
Name
Description
Auto
Expand buttons are displayed when the DetailRowTemplate is specified.
Never
Expand buttons are always hidden.
The Grid allows users to create master-detail layouts of any complexity. To enable this functionality, specify the DetailRowTemplate .
A user can click a data row’s expand/collapse button to change a detail row’s expansion state and show/hide detail data.
Use the DetailExpandButtonDisplayMode
property to specify when to display master-detail expand buttons in the Grid. The default property value is Auto
. The Grid shows expand buttons if the DetailRowTemplate is specified and the DetailRowDisplayMode is set to Auto
. Otherwise, expand buttons are hidden.
The following example changes DetailExpandButtonDisplayMode
to Never
:
@inject NwindDataService NwindDataService
<DxGrid @ref ="Grid"
Data ="MasterGridData"
DetailExpandButtonDisplayMode ="GridDetailExpandButtonDisplayMode.Never" >
<Columns >
<DxGridDataColumn FieldName ="ContactName" SortIndex ="0" />
<DxGridDataColumn FieldName ="CompanyName" />
<DxGridDataColumn FieldName ="Country" />
<DxGridDataColumn FieldName ="City" />
</Columns >
<DetailRowTemplate >
<Grid_MasterDetail_NestedGrid_DetailContent Customer ="(Customer)context.DataItem" />
</DetailRowTemplate >
</DxGrid >
@ code {
IGrid Grid { get ; set ; }
object MasterGridData { get ; set ; }
protected override async Task OnInitializedAsync ( ) {
MasterGridData = await NwindDataService.GetCustomersAsync();
}
protected override void OnAfterRender (bool firstRender ) {
if (firstRender) {
Grid.ExpandDetailRow(0 );
}
}
}
@inject NwindDataService NwindDataService
<div class ="mb-2" >
Contact Phone: @ Customer.Phone
</div >
<DxGrid Data ="DetailGridData"
PageSize ="5"
AutoExpandAllGroupRows ="true" >
<Columns >
<DxGridDataColumn FieldName ="OrderId" DisplayFormat ="d" GroupIndex ="0" />
<DxGridDataColumn FieldName ="ProductName" Width ="40%" />
<DxGridDataColumn FieldName ="UnitPrice" DisplayFormat ="c" />
<DxGridDataColumn FieldName ="Quantity" />
<DxGridDataColumn FieldName ="Discount" DisplayFormat ="p0" />
<DxGridDataColumn FieldName ="ExtendedPrice" DisplayFormat ="c" />
</Columns >
<GroupSummary >
<DxGridSummaryItem SummaryType ="GridSummaryItemType.Sum"
FieldName ="ExtendedPrice"
FooterColumnName ="ExtendedPrice" />
</GroupSummary >
</DxGrid >
@ code {
[Parameter ]
public Customer Customer { get ; set ; }
object DetailGridData { get ; set ; }
protected override async Task OnInitializedAsync ( ) {
var invoices = await NwindDataService.GetInvoicesAsync();
DetailGridData = invoices
.Where(i => i.CustomerId == Customer.CustomerId)
.ToArray();
}
}
using System ;
using System.Collections.Generic ;
using System.Runtime.InteropServices ;
namespace BlazorDemo.Data.Northwind {
public partial class Customer {
public Customer ( ) {
Orders = new HashSet<Order>();
}
public string CustomerId { get ; set ; }
public string CompanyName { get ; set ; }
public string ContactName { get ; set ; }
public string ContactTitle { 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 Phone { get ; set ; }
public string Fax { get ; set ; }
public virtual ICollection<Order> Orders { get ; set ; }
}
}
using System ;
using System.Collections.Generic ;
using System.Runtime.InteropServices ;
namespace BlazorDemo.Data.Northwind {
public 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 ; }
}
}
builder.Services.AddScoped<NwindDataService>();
See Also