The Ignite UI for Blazor Row Dragging feature in Blazor Hierarchical Grid is easily configurable and is used for rearranging rows within the grid by dragging and dropping them to a new position using the mouse. It is initialized on the root IgbHierarchicalGrid component and is configurable via the RowDraggable input.
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Configuration
In order to enable row-dragging for your IgbHierarchicalGrid, all you need to do is set the grid's RowDraggable to true. Once this is enabled, a row-drag handle will be displayed on each row. This handle can be used to initiate row dragging. Clicking on the drag-handle and moving the cursor while holding down the button will cause the grid's RowDragStart event to fire. Releasing the click at any time will cause RowDragEnd event to fire.
The drag handle icon can be templated using the grid's DragIndicatorIconTemplate. In the example we're building, let's change the icon from the default one (drag_indicator) to drag_handle.
To do so, we can use the DragIndicatorIcon to pass a template inside of the IgbHierarchicalGrid's body:
With the help of the grid's row drag events you can create a grid that allows you to reorder rows by dragging them.
<IgbHierarchicalGridData="CustomersData"PrimaryKey="ID"RowDraggable="true"RowDragEndScript="WebHierarchicalGridReorderRowHandler"></IgbHierarchicalGrid>
// In JavaScript
igRegisterScript("WebHierarchicalGridReorderRowHandler", (args) => {
const ghostElement = args.detail.dragDirective.ghostElement;
const dragElementPos = ghostElement.getBoundingClientRect();
const grid = document.getElementsByTagName("igc-hierarchical-grid")[0];
const rows = Array.prototype.slice.call(document.getElementsByTagName("igx-hierarchical-grid-row"));
const currRowIndex = this.getCurrentRowIndex(rows,
{ x: dragElementPos.x, y: dragElementPos.y });
if (currRowIndex === -1) { return; }
// remove the row that was dragged and place it onto its new location
grid.deleteRow(args.detail.dragData.key);
grid.data.splice(currRowIndex, 0, args.detail.dragData.data);
}, false);
function getCurrentRowIndex(rowList, cursorPosition) {
for (const row of rowList) {
const rowRect = row.getBoundingClientRect();
if (cursorPosition.y > rowRect.top + window.scrollY && cursorPosition.y < rowRect.bottom + window.scrollY &&
cursorPosition.x > rowRect.left + window.scrollX && cursorPosition.x < rowRect.right + window.scrollX) {
// returntheindexofthetargetedrowreturnparseInt(row.attributes["data-rowindex"].value);
}
}
return-1;
}
razor
Make sure that there is a PrimaryKey specified for the grid! The logic needs an unique identifier for the rows so they can be properly reordered.
Once RowDraggable is enabled and a drop zone has been defined, you need to implement a simple handler for the drop event. When a row is dragged, check the following:
Is the row expanded? If so, collapse it.
Was the row dropped inside of the grid?
If so, on which other row was the dragged row dropped?
Once you've found the target row, swap the records' places in the Data array
Was the row initially selected? If so, mark it as selected.
Below, you can see this implemented:
<IgbHierarchicalGridData="SingersData"PrimaryKey="ID"RowDraggable="true"RowDragEndScript="WebGridReorderRowHandler"></IgbHierarchicalGrid >
//In JavaScript
igRegisterScript("WebGridReorderRowHandler", (args) => {
const ghostElement = args.detail.dragDirective.ghostElement;
const dragElementPos = ghostElement.getBoundingClientRect();
const grid = document.getElementsByTagName("igc-hierarchical-grid")[0];
const rows = Array.prototype.slice.call(document.getElementsByTagName("igx-hierarchical-grid-row"));
const currRowIndex = this.getCurrentRowIndex(rows,
{ x: dragElementPos.x, y: dragElementPos.y });
if (currRowIndex === -1) { return; }
// remove the row that was dragged and place it onto its new location
grid.deleteRow(args.detail.dragData.key);
grid.data.splice(currRowIndex, 0, args.detail.dragData.data);
}, false);
function getCurrentRowIndex(rowList, cursorPosition) {
for (const row of rowList) {
const rowRect = row.getBoundingClientRect();
if (cursorPosition.y > rowRect.top + window.scrollY && cursorPosition.y < rowRect.bottom + window.scrollY &&
cursorPosition.x > rowRect.left + window.scrollX && cursorPosition.x < rowRect.right + window.scrollX) {
// returntheindexofthetargetedrowreturnparseInt(row.attributes["data-rowindex"].value);
}
}
return-1;
}
razor
With these few easy steps, you've configured a grid that allows reordering rows via drag/drop! You can see the above code in action in the following demo.
Notice that we also have row selection enabled and we preserve the selection when dropping the dragged row.
EXAMPLE
MODULES
DATA
RAZOR
JS
CSS
using System;
using System.Net.Http;
using System.Collections.Generic;
using System.Threading.Tasks;
using System.Text;
using Microsoft.AspNetCore.Components.WebAssembly.Hosting;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
using IgniteUI.Blazor.Controls; // for registering Ignite UI modulesnamespaceInfragistics.Samples
{
publicclassProgram
{
publicstaticasync Task Main(string[] args)
{
var builder = WebAssemblyHostBuilder.CreateDefault(args);
builder.RootComponents.Add<App>("app");
builder.Services.AddScoped(sp => new HttpClient { BaseAddress = new Uri(builder.HostEnvironment.BaseAddress) });
// registering Ignite UI modules
builder.Services.AddIgniteUIBlazor(
typeof(IgbHierarchicalGridModule)
);
await builder.Build().RunAsync();
}
}
}cs
using System;
using System.Collections.Generic;
publicclassSingersDataItem
{
publicdouble ID { get; set; }
publicstring Artist { get; set; }
publicstring Photo { get; set; }
publicdouble Debut { get; set; }
publicdouble GrammyNominations { get; set; }
publicdouble GrammyAwards { get; set; }
publicbool HasGrammyAward { get; set; }
public List<SingersDataItem_ToursItem> Tours { get; set; }
public List<SingersDataItem_AlbumsItem> Albums { get; set; }
}
publicclassSingersDataItem_ToursItem
{
publicstring Tour { get; set; }
publicstring StartedOn { get; set; }
publicstring Location { get; set; }
publicstring Headliner { get; set; }
publicstring TouredBy { get; set; }
}
publicclassSingersDataItem_AlbumsItem
{
publicstring Album { get; set; }
publicstring LaunchDate { get; set; }
publicdouble BillboardReview { get; set; }
publicdouble USBillboard200 { get; set; }
publicstring Artist { get; set; }
}
publicclassSingersData
: List<SingersDataItem>
{
publicSingersData()
{
this.Add(new SingersDataItem()
{
ID = 0,
Artist = @"Naomí Yepes",
Photo = @"https://static.infragistics.com/xplatform/images/people/names/naomi.jpg",
Debut = 2011,
GrammyNominations = 6,
GrammyAwards = 0,
HasGrammyAward = false,
Tours = new List<SingersDataItem_ToursItem>()
{
new SingersDataItem_ToursItem()
{
Tour = @"Faithful Tour",
StartedOn = @"Sep 12",
Location = @"Worldwide",
Headliner = @"NO",
TouredBy = @"Naomí Yepes"
},
new SingersDataItem_ToursItem()
{
Tour = @"City Jam Sessions",
StartedOn = @"Aug 13",
Location = @"North America",
Headliner = @"YES",
TouredBy = @"Naomí Yepes"
},
new SingersDataItem_ToursItem()
{
Tour = @"Christmas NYC 2013",
StartedOn = @"Dec 13",
Location = @"United States",
Headliner = @"NO",
TouredBy = @"Naomí Yepes"
},
new SingersDataItem_ToursItem()
{
Tour = @"Christmas NYC 2014",
StartedOn = @"Dec 14",
Location = @"North America",
Headliner = @"NO",
TouredBy = @"Naomí Yepes"
},
new SingersDataItem_ToursItem()
{
Tour = @"Watermelon Tour",
StartedOn = @"Feb 15",
Location = @"Worldwide",
Headliner = @"YES",
TouredBy = @"Naomí Yepes"
},
new SingersDataItem_ToursItem()
{
Tour = @"Christmas NYC 2016",
StartedOn = @"Dec 16",
Location = @"United States",
Headliner = @"NO",
TouredBy = @"Naomí Yepes"
},
new SingersDataItem_ToursItem()
{
Tour = @"The Dragon Tour",
StartedOn = @"Feb 17",
Location = @"Worldwide",
Headliner = @"NO",
TouredBy = @"Naomí Yepes"
},
new SingersDataItem_ToursItem()
{
Tour = @"Organic Sessions",
StartedOn = @"Aug 18",
Location = @"United States, England",
Headliner = @"YES",
TouredBy = @"Naomí Yepes"
},
new SingersDataItem_ToursItem()
{
Tour = @"Hope World Tour",
StartedOn = @"Mar 19",
Location = @"Worldwide",
Headliner = @"NO",
TouredBy = @"Naomí Yepes"
}}
,
Albums = new List<SingersDataItem_AlbumsItem>()
{
new SingersDataItem_AlbumsItem()
{
Album = @"Initiation",
LaunchDate = @"September 3, 2013",
BillboardReview = 86,
USBillboard200 = 1,
Artist = @"Naomí Yepes"
},
new SingersDataItem_AlbumsItem()
{
Album = @"Dream Driven",
LaunchDate = @"August 25, 2014",
BillboardReview = 81,
USBillboard200 = 1,
Artist = @"Naomí Yepes"
},
new SingersDataItem_AlbumsItem()
{
Album = @"The dragon journey",
LaunchDate = @"May 20, 2016",
BillboardReview = 60,
USBillboard200 = 2,
Artist = @"Naomí Yepes"
},
new SingersDataItem_AlbumsItem()
{
Album = @"Organic me",
LaunchDate = @"August 17, 2018",
BillboardReview = 82,
USBillboard200 = 1,
Artist = @"Naomí Yepes"
},
new SingersDataItem_AlbumsItem()
{
Album = @"Curiosity",
LaunchDate = @"December 7, 2019",
BillboardReview = 75,
USBillboard200 = 12,
Artist = @"Naomí Yepes"
}}
});
this.Add(new SingersDataItem()
{
ID = 1,
Artist = @"Babila Ebwélé",
Photo = @"https://static.infragistics.com/xplatform/images/people/names/babila.jpg",
Debut = 2009,
GrammyNominations = 0,
GrammyAwards = 11,
HasGrammyAward = true,
Tours = new List<SingersDataItem_ToursItem>()
{
new SingersDataItem_ToursItem()
{
Tour = @"The last straw",
StartedOn = @"May 09",
Location = @"Europe, Asia",
Headliner = @"NO",
TouredBy = @"Babila Ebwélé"
},
new SingersDataItem_ToursItem()
{
Tour = @"No foundations",
StartedOn = @"Jun 04",
Location = @"United States, Europe",
Headliner = @"YES",
TouredBy = @"Babila Ebwélé"
},
new SingersDataItem_ToursItem()
{
Tour = @"Crazy eyes",
StartedOn = @"Jun 08",
Location = @"North America",
Headliner = @"NO",
TouredBy = @"Babila Ebwélé"
},
new SingersDataItem_ToursItem()
{
Tour = @"Zero gravity",
StartedOn = @"Apr 19",
Location = @"United States",
Headliner = @"NO",
TouredBy = @"Babila Ebwélé"
},
new SingersDataItem_ToursItem()
{
Tour = @"Battle with myself",
StartedOn = @"Mar 08",
Location = @"North America",
Headliner = @"YES",
TouredBy = @"Babila Ebwélé"
}}
,
Albums = new List<SingersDataItem_AlbumsItem>()
{
new SingersDataItem_AlbumsItem()
{
Album = @"Pushing up daisies",
LaunchDate = @"May 31, 2000",
BillboardReview = 86,
USBillboard200 = 42,
Artist = @"Babila Ebwélé"
},
new SingersDataItem_AlbumsItem()
{
Album = @"Death's dead",
LaunchDate = @"June 8, 2016",
BillboardReview = 85,
USBillboard200 = 95,
Artist = @"Babila Ebwélé"
}}
});
this.Add(new SingersDataItem()
{
ID = 2,
Artist = @"Ahmad Nazeri",
Photo = @"https://static.infragistics.com/xplatform/images/people/names/ahmad.jpg",
Debut = 2004,
GrammyNominations = 3,
GrammyAwards = 1,
HasGrammyAward = true,
Tours = new List<SingersDataItem_ToursItem>()
{
}
,
Albums = new List<SingersDataItem_AlbumsItem>()
{
new SingersDataItem_AlbumsItem()
{
Album = @"Emergency",
LaunchDate = @"March 6, 2004",
BillboardReview = 98,
USBillboard200 = 69,
Artist = @"Ahmad Nazeri"
},
new SingersDataItem_AlbumsItem()
{
Album = @"Bursting bubbles",
LaunchDate = @"April 17, 2006",
BillboardReview = 69,
USBillboard200 = 39,
Artist = @"Ahmad Nazeri"
}}
});
this.Add(new SingersDataItem()
{
ID = 3,
Artist = @"Kimmy McIlmorie",
Photo = @"https://static.infragistics.com/xplatform/images/people/names/kimmy.jpg",
Debut = 2007,
GrammyNominations = 21,
GrammyAwards = 3,
HasGrammyAward = true,
Tours = new List<SingersDataItem_ToursItem>()
{
}
,
Albums = new List<SingersDataItem_AlbumsItem>()
{
new SingersDataItem_AlbumsItem()
{
Album = @"Here we go again",
LaunchDate = @"November 18, 2017",
BillboardReview = 68,
USBillboard200 = 1,
Artist = @"Kimmy McIlmorie"
}}
});
this.Add(new SingersDataItem()
{
ID = 4,
Artist = @"Mar Rueda",
Photo = @"https://static.infragistics.com/xplatform/images/people/names/mar.jpg",
Debut = 1996,
GrammyNominations = 14,
GrammyAwards = 2,
HasGrammyAward = true,
Tours = new List<SingersDataItem_ToursItem>()
{
}
,
Albums = new List<SingersDataItem_AlbumsItem>()
{
}
});
this.Add(new SingersDataItem()
{
ID = 5,
Artist = @"Izabella Tabakova",
Photo = @"https://static.infragistics.com/xplatform/images/people/names/izabella.jpg",
Debut = 2017,
GrammyNominations = 7,
GrammyAwards = 11,
HasGrammyAward = true,
Tours = new List<SingersDataItem_ToursItem>()
{
new SingersDataItem_ToursItem()
{
Tour = @"Final breath",
StartedOn = @"Jun 13",
Location = @"Europe",
Headliner = @"YES",
TouredBy = @"Izabella Tabakova"
},
new SingersDataItem_ToursItem()
{
Tour = @"Once bitten",
StartedOn = @"Dec 18",
Location = @"Australia, United States",
Headliner = @"NO",
TouredBy = @"Izabella Tabakova"
},
new SingersDataItem_ToursItem()
{
Tour = @"Code word",
StartedOn = @"Sep 19",
Location = @"United States, Europe",
Headliner = @"NO",
TouredBy = @"Izabella Tabakova"
},
new SingersDataItem_ToursItem()
{
Tour = @"Final draft",
StartedOn = @"Sep 17",
Location = @"United States, Europe",
Headliner = @"YES",
TouredBy = @"Izabella Tabakova"
}}
,
Albums = new List<SingersDataItem_AlbumsItem>()
{
new SingersDataItem_AlbumsItem()
{
Album = @"Once bitten",
LaunchDate = @"July 16, 2007",
BillboardReview = 79,
USBillboard200 = 53,
Artist = @"Izabella Tabakova"
},
new SingersDataItem_AlbumsItem()
{
Album = @"Your graciousness",
LaunchDate = @"November 17, 2004",
BillboardReview = 69,
USBillboard200 = 30,
Artist = @"Izabella Tabakova"
},
new SingersDataItem_AlbumsItem()
{
Album = @"Dark matters",
LaunchDate = @"November 3, 2002",
BillboardReview = 79,
USBillboard200 = 85,
Artist = @"Izabella Tabakova"
}}
});
this.Add(new SingersDataItem()
{
ID = 6,
Artist = @"Nguyễn Diệp Chi",
Photo = @"https://static.infragistics.com/xplatform/images/people/names/nguyen.jpg",
Debut = 1992,
GrammyNominations = 4,
GrammyAwards = 2,
HasGrammyAward = true,
Tours = new List<SingersDataItem_ToursItem>()
{
}
,
Albums = new List<SingersDataItem_AlbumsItem>()
{
new SingersDataItem_AlbumsItem()
{
Album = @"Library of liberty",
LaunchDate = @"December 22, 2003",
BillboardReview = 93,
USBillboard200 = 5,
Artist = @"Nguyễn Diệp Chi"
}}
});
this.Add(new SingersDataItem()
{
ID = 7,
Artist = @"Eva Lee",
Photo = @"https://static.infragistics.com/xplatform/images/people/names/eva.jpg",
Debut = 2008,
GrammyNominations = 2,
GrammyAwards = 0,
HasGrammyAward = false,
Tours = new List<SingersDataItem_ToursItem>()
{
}
,
Albums = new List<SingersDataItem_AlbumsItem>()
{
new SingersDataItem_AlbumsItem()
{
Album = @"Just a tease",
LaunchDate = @"May 3, 2001",
BillboardReview = 91,
USBillboard200 = 29,
Artist = @"Eva Lee"
}}
});
this.Add(new SingersDataItem()
{
ID = 8,
Artist = @"Siri Jakobsson",
Photo = @"https://static.infragistics.com/xplatform/images/people/names/siri.jpg",
Debut = 1990,
GrammyNominations = 2,
GrammyAwards = 8,
HasGrammyAward = true,
Tours = new List<SingersDataItem_ToursItem>()
{
new SingersDataItem_ToursItem()
{
Tour = @"Basket case",
StartedOn = @"Jan 07",
Location = @"Europe, Asia",
Headliner = @"NO",
TouredBy = @"Siri Jakobsson"
},
new SingersDataItem_ToursItem()
{
Tour = @"The bigger fish",
StartedOn = @"Dec 07",
Location = @"United States, Europe",
Headliner = @"YES",
TouredBy = @"Siri Jakobsson"
},
new SingersDataItem_ToursItem()
{
Tour = @"Missed the boat",
StartedOn = @"Jun 09",
Location = @"Europe, Asia",
Headliner = @"NO",
TouredBy = @"Siri Jakobsson"
},
new SingersDataItem_ToursItem()
{
Tour = @"Equivalent exchange",
StartedOn = @"Feb 06",
Location = @"United States, Europe",
Headliner = @"YES",
TouredBy = @"Siri Jakobsson"
},
new SingersDataItem_ToursItem()
{
Tour = @"Damage control",
StartedOn = @"Oct 11",
Location = @"Australia, United States",
Headliner = @"NO",
TouredBy = @"Siri Jakobsson"
}}
,
Albums = new List<SingersDataItem_AlbumsItem>()
{
new SingersDataItem_AlbumsItem()
{
Album = @"Under the bus",
LaunchDate = @"May 14, 2000",
BillboardReview = 67,
USBillboard200 = 67,
Artist = @"Siri Jakobsson"
}}
});
this.Add(new SingersDataItem()
{
ID = 9,
Artist = @"Pablo Cambeiro",
Photo = @"https://static.infragistics.com/xplatform/images/people/names/pablo.jpg",
Debut = 2011,
GrammyNominations = 5,
GrammyAwards = 0,
HasGrammyAward = false,
Tours = new List<SingersDataItem_ToursItem>()
{
new SingersDataItem_ToursItem()
{
Tour = @"Beads",
StartedOn = @"May 11",
Location = @"Worldwide",
Headliner = @"NO",
TouredBy = @"Pablo Cambeiro"
},
new SingersDataItem_ToursItem()
{
Tour = @"Concept art",
StartedOn = @"Dec 18",
Location = @"United States",
Headliner = @"YES",
TouredBy = @"Pablo Cambeiro"
},
new SingersDataItem_ToursItem()
{
Tour = @"Glass shoe",
StartedOn = @"Jan 20",
Location = @"Worldwide",
Headliner = @"YES",
TouredBy = @"Pablo Cambeiro"
},
new SingersDataItem_ToursItem()
{
Tour = @"Pushing buttons",
StartedOn = @"Feb 15",
Location = @"Europe, Asia",
Headliner = @"NO",
TouredBy = @"Pablo Cambeiro"
},
new SingersDataItem_ToursItem()
{
Tour = @"Dark matters",
StartedOn = @"Jan 04",
Location = @"Australia, United States",
Headliner = @"YES",
TouredBy = @"Pablo Cambeiro"
},
new SingersDataItem_ToursItem()
{
Tour = @"Greener grass",
StartedOn = @"Sep 09",
Location = @"United States, Europe",
Headliner = @"NO",
TouredBy = @"Pablo Cambeiro"
},
new SingersDataItem_ToursItem()
{
Tour = @"Apparatus",
StartedOn = @"Nov 16",
Location = @"Europe",
Headliner = @"NO",
TouredBy = @"Pablo Cambeiro"
}}
,
Albums = new List<SingersDataItem_AlbumsItem>()
{
new SingersDataItem_AlbumsItem()
{
Album = @"Fluke",
LaunchDate = @"August 4, 2017",
BillboardReview = 93,
USBillboard200 = 98,
Artist = @"Pablo Cambeiro"
},
new SingersDataItem_AlbumsItem()
{
Album = @"Crowd control",
LaunchDate = @"August 26, 2003",
BillboardReview = 68,
USBillboard200 = 84,
Artist = @"Pablo Cambeiro"
}}
});
this.Add(new SingersDataItem()
{
ID = 10,
Artist = @"Athar Malakooti",
Photo = @"https://static.infragistics.com/xplatform/images/people/names/athar.jpg",
Debut = 2017,
GrammyNominations = 0,
GrammyAwards = 0,
HasGrammyAward = false,
Tours = new List<SingersDataItem_ToursItem>()
{
}
,
Albums = new List<SingersDataItem_AlbumsItem>()
{
new SingersDataItem_AlbumsItem()
{
Album = @"Pushing up daisies",
LaunchDate = @"February 24, 2016",
BillboardReview = 74,
USBillboard200 = 77,
Artist = @"Athar Malakooti"
}}
});
this.Add(new SingersDataItem()
{
ID = 11,
Artist = @"Marti Valencia",
Photo = @"https://static.infragistics.com/xplatform/images/people/names/marti.jpg",
Debut = 2004,
GrammyNominations = 1,
GrammyAwards = 1,
HasGrammyAward = true,
Tours = new List<SingersDataItem_ToursItem>()
{
new SingersDataItem_ToursItem()
{
Tour = @"Cat eat cat world",
StartedOn = @"Sep 00",
Location = @"Worldwide",
Headliner = @"YES",
TouredBy = @"Marti Valencia"
},
new SingersDataItem_ToursItem()
{
Tour = @"Final straw",
StartedOn = @"Sep 06",
Location = @"United States, Europe",
Headliner = @"NO",
TouredBy = @"Marti Valencia"
}}
,
Albums = new List<SingersDataItem_AlbumsItem>()
{
new SingersDataItem_AlbumsItem()
{
Album = @"Nemesis",
LaunchDate = @"June 30, 2004",
BillboardReview = 94,
USBillboard200 = 9,
Artist = @"Marti Valencia"
},
new SingersDataItem_AlbumsItem()
{
Album = @"First chance",
LaunchDate = @"January 7, 2019",
BillboardReview = 96,
USBillboard200 = 19,
Artist = @"Marti Valencia"
},
new SingersDataItem_AlbumsItem()
{
Album = @"God's advocate",
LaunchDate = @"April 29, 2007",
BillboardReview = 66,
USBillboard200 = 37,
Artist = @"Marti Valencia"
}}
});
this.Add(new SingersDataItem()
{
ID = 12,
Artist = @"Alicia Stanger",
Photo = @"https://static.infragistics.com/xplatform/images/people/names/alicia.jpg",
Debut = 2010,
GrammyNominations = 1,
GrammyAwards = 0,
HasGrammyAward = false,
Tours = new List<SingersDataItem_ToursItem>()
{
}
,
Albums = new List<SingersDataItem_AlbumsItem>()
{
new SingersDataItem_AlbumsItem()
{
Album = @"Forever alone",
LaunchDate = @"November 3, 2005",
BillboardReview = 82,
USBillboard200 = 7,
Artist = @"Alicia Stanger"
}}
});
this.Add(new SingersDataItem()
{
ID = 13,
Artist = @"Peter Taylor",
Photo = @"https://static.infragistics.com/xplatform/images/people/names/peter.jpg",
Debut = 2005,
GrammyNominations = 0,
GrammyAwards = 2,
HasGrammyAward = true,
Tours = new List<SingersDataItem_ToursItem>()
{
new SingersDataItem_ToursItem()
{
Tour = @"Love",
StartedOn = @"Jun 04",
Location = @"Europe, Asia",
Headliner = @"YES",
TouredBy = @"Peter Taylor"
},
new SingersDataItem_ToursItem()
{
Tour = @"Fault of treasures",
StartedOn = @"Oct 13",
Location = @"North America",
Headliner = @"NO",
TouredBy = @"Peter Taylor"
},
new SingersDataItem_ToursItem()
{
Tour = @"For eternity",
StartedOn = @"Mar 05",
Location = @"United States",
Headliner = @"YES",
TouredBy = @"Peter Taylor"
},
new SingersDataItem_ToursItem()
{
Tour = @"Time flies",
StartedOn = @"Jun 03",
Location = @"North America",
Headliner = @"NO",
TouredBy = @"Peter Taylor"
},
new SingersDataItem_ToursItem()
{
Tour = @"Highest difficulty",
StartedOn = @"Nov 01",
Location = @"Worldwide",
Headliner = @"YES",
TouredBy = @"Peter Taylor"
},
new SingersDataItem_ToursItem()
{
Tour = @"Sleeping dogs",
StartedOn = @"May 04",
Location = @"United States, Europe",
Headliner = @"NO",
TouredBy = @"Peter Taylor"
}}
,
Albums = new List<SingersDataItem_AlbumsItem>()
{
new SingersDataItem_AlbumsItem()
{
Album = @"Decisions decisions",
LaunchDate = @"April 10, 2008",
BillboardReview = 85,
USBillboard200 = 35,
Artist = @"Peter Taylor"
},
new SingersDataItem_AlbumsItem()
{
Album = @"Climate changed",
LaunchDate = @"June 20, 2015",
BillboardReview = 66,
USBillboard200 = 89,
Artist = @"Peter Taylor"
}}
});
}
}cs
@using IgniteUI.Blazor.Controls
@inject IJSRuntime JS<divclass="container vertical ig-typography"><divclass="container vertical fill"><IgbHierarchicalGridAutoGenerate="false"Data="SingersData"Name="hierarchicalGrid"
@ref="hierarchicalGrid"Id="hierarchicalGrid"PrimaryKey="ID"RowDraggable="true"RowDragEndScript="WebHierarchicalGridReorderRowHandler"><IgbColumnField="Artist"Header="Artist"DataType="GridColumnDataType.String"Sortable="true"></IgbColumn><IgbColumnField="Photo"Header="Photo"DataType="GridColumnDataType.Image"></IgbColumn><IgbColumnField="Debut"Header="Debut"DataType="GridColumnDataType.Number"Sortable="true"></IgbColumn><IgbColumnField="GrammyNominations"Header="Grammy Nominations"DataType="GridColumnDataType.Number"Sortable="true"></IgbColumn><IgbColumnField="GrammyAwards"Header="Grammy Awards"DataType="GridColumnDataType.Number"Sortable="true"></IgbColumn><IgbRowIslandChildDataKey="Albums"AutoGenerate="false"><IgbColumnField="Album"Header="Album"DataType="GridColumnDataType.String"Sortable="true"></IgbColumn><IgbColumnField="LaunchDate"Header="Launch Date"DataType="GridColumnDataType.Date"Sortable="true"></IgbColumn><IgbColumnField="BillboardReview"Header="Billboard Review"DataType="GridColumnDataType.String"Sortable="true"></IgbColumn><IgbColumnField="USBillboard200"Header="US Billboard 200"DataType="GridColumnDataType.String"Sortable="true"></IgbColumn><IgbRowIslandChildDataKey="Songs"AutoGenerate="false"><IgbColumnField="Number"Header="No."DataType="GridColumnDataType.String"Sortable="true"></IgbColumn><IgbColumnField="Title"Header="Title"DataType="GridColumnDataType.String"Sortable="true"></IgbColumn><IgbColumnField="Released"Header="Released"DataType="GridColumnDataType.Date"Sortable="true"></IgbColumn><IgbColumnField="Genre"Header="Genre"DataType="GridColumnDataType.String"Sortable="true"></IgbColumn></IgbRowIsland></IgbRowIsland><IgbRowIslandChildDataKey="Tours"AutoGenerate="false"><IgbColumnField="Tour"Header="Tour"DataType="GridColumnDataType.String"Sortable="true"></IgbColumn><IgbColumnField="StartedOn"Header="Started on"DataType="GridColumnDataType.String"Sortable="true"></IgbColumn><IgbColumnField="Location"Header="Location"DataType="GridColumnDataType.String"Sortable="true"></IgbColumn><IgbColumnField="Headliner"Header="Headliner"DataType="GridColumnDataType.String"Sortable="true"></IgbColumn></IgbRowIsland></IgbHierarchicalGrid></div></div>@code {protectedoverrideasync Task OnAfterRenderAsync(bool firstRender)
{
var hierarchicalGrid = this.hierarchicalGrid;
}
private IgbHierarchicalGrid hierarchicalGrid;
private SingersData _singersData = null;
public SingersData SingersData
{
get
{
if (_singersData == null)
{
_singersData = new SingersData();
}
return _singersData;
}
}
}razor
igRegisterScript("WebHierarchicalGridReorderRowHandler", (args) => {
const ghostElement = args.detail.dragDirective.ghostElement;
const dragElementPos = ghostElement.getBoundingClientRect();
const grid = document.getElementsByTagName("igc-hierarchical-grid")[0];
const rows = Array.prototype.slice.call(document.getElementsByTagName("igx-hierarchical-grid-row"));
const currRowIndex = this.getCurrentRowIndex(rows,
{ x: dragElementPos.x, y: dragElementPos.y });
if (currRowIndex === -1) { return; }
// remove the row that was dragged and place it onto its new location
grid.deleteRow(args.detail.dragData.key);
grid.data.splice(currRowIndex, 0, args.detail.dragData.data);
}, false);
functiongetCurrentRowIndex(rowList, cursorPosition) {
for (const row of rowList) {
const rowRect = row.getBoundingClientRect();
if (cursorPosition.y > rowRect.top + window.scrollY && cursorPosition.y < rowRect.bottom + window.scrollY &&
cursorPosition.x > rowRect.left + window.scrollX && cursorPosition.x < rowRect.right + window.scrollX) {
// return the index of the targeted rowreturnparseInt(row.attributes["data-rowindex"].value);
}
}
return -1;
}
js
/*
CSS styles are loaded from the shared CSS file located at:
https://static.infragistics.com/xplatform/css/samples/
*/css
Limitations
Currently, there are no known limitations for the RowDraggable.