Row Dragging in Blazor Tree Grid

La función de arrastrar filas Ignite UI for Blazor en Blazor Tree Grid se puede configurar fácilmente y se utiliza para reorganizar filas dentro de la cuadrícula arrastrándolas y soltándolas en una nueva posición con el mouse. Se inicializa en el componente raíz IgbTreeGrid y se puede configurar a través de la entrada RowDraggable.

すぐに使用できる機能のフルセット は、ページング、ソート、フィルタリング、編集、グループ化から行と列の仮想化まで、あらゆる機能をカバーします。.NET 開発者には制限はありません。

無料で試してみる

Blazor Tree Grid Row Drag Example

EXAMPLE

DATA

MODULES

RAZOR

JS

CSS

using System;
using System.Collections.Generic;
public class EmployeesNestedDataItem
{
    public double ID { get; set; }
    public double Age { get; set; }
    public double Salary { get; set; }
    public double Productivity { get; set; }
    public string City { get; set; }
    public string Country { get; set; }
    public string Phone { get; set; }
    public string HireDate { get; set; }
    public string Name { get; set; }
    public string Title { get; set; }
    public List<EmployeesNestedDataItem_EmployeesItem> Employees { get; set; }
}
public class EmployeesNestedDataItem_EmployeesItem
{
    public double Age { get; set; }
    public double Salary { get; set; }
    public double Productivity { get; set; }
    public string City { get; set; }
    public string Country { get; set; }
    public string Phone { get; set; }
    public string HireDate { get; set; }
    public double ID { get; set; }
    public string Name { get; set; }
    public string Title { get; set; }
}

public class EmployeesNestedData
    : List<EmployeesNestedDataItem>
{
    public EmployeesNestedData()
    {
        this.Add(new EmployeesNestedDataItem()
        {
            ID = 1,
            Age = 55,
            Salary = 80000,
            Productivity = 90,
            City = @"Berlin",
            Country = @"Germany",
            Phone = @"609-202-505",
            HireDate = @"2008-03-20",
            Name = @"John Winchester",
            Title = @"Development Manager",
            Employees = new List<EmployeesNestedDataItem_EmployeesItem>()
            {
                new EmployeesNestedDataItem_EmployeesItem()
                {
                    Age = 43,
                    Salary = 70000,
                    Productivity = 80,
                    City = @"Hamburg",
                    Country = @"Germany",
                    Phone = @"609-444-555",
                    HireDate = @"2011-06-03",
                    ID = 3,
                    Name = @"Michael Burke",
                    Title = @"Senior Software Developer"
                },
                new EmployeesNestedDataItem_EmployeesItem()
                {
                    Age = 29,
                    Salary = 60000,
                    Productivity = 80,
                    City = @"Munich",
                    Country = @"Germany",
                    Phone = @"609-333-444",
                    HireDate = @"2009-06-19",
                    ID = 2,
                    Name = @"Thomas Anderson",
                    Title = @"Senior Software Developer"
                },
                new EmployeesNestedDataItem_EmployeesItem()
                {
                    Age = 31,
                    Salary = 90000,
                    Productivity = 80,
                    City = @"Warasw",
                    Country = @"Poland",
                    Phone = @"609-222-205",
                    HireDate = @"2014-08-18",
                    ID = 11,
                    Name = @"Monica Reyes",
                    Title = @"Software Development Team Lead"
                },
                new EmployeesNestedDataItem_EmployeesItem()
                {
                    Age = 35,
                    Salary = 70000,
                    Productivity = 70,
                    City = @"Koln",
                    Country = @"Germany",
                    Phone = @"609-502-525",
                    HireDate = @"2015-09-17",
                    ID = 6,
                    Name = @"Roland Mendel",
                    Title = @"Senior Software Developer"
                }}

        });
        this.Add(new EmployeesNestedDataItem()
        {
            ID = 4,
            Age = 42,
            Salary = 90000,
            Productivity = 80,
            City = @"Kielce",
            Country = @"Poland",
            Phone = @"609-202-505",
            HireDate = @"2014-01-22",
            Name = @"Ana Sanders",
            Title = @"CEO",
            Employees = new List<EmployeesNestedDataItem_EmployeesItem>()
            {
                new EmployeesNestedDataItem_EmployeesItem()
                {
                    Age = 44,
                    Salary = 80000,
                    Productivity = 80,
                    City = @"Warasw",
                    Country = @"Poland",
                    Phone = @"609-202-505",
                    HireDate = @"2014-04-04",
                    ID = 14,
                    Name = @"Laurence Johnson",
                    Title = @"Director"
                },
                new EmployeesNestedDataItem_EmployeesItem()
                {
                    Age = 25,
                    Salary = 85000,
                    Productivity = 55,
                    City = @"Paris",
                    Country = @"France",
                    Phone = @"609-202-505",
                    HireDate = @"2017-11-09",
                    ID = 5,
                    Name = @"Elizabeth Richards",
                    Title = @"Vice President"
                },
                new EmployeesNestedDataItem_EmployeesItem()
                {
                    Age = 39,
                    Salary = 88000,
                    Productivity = 88,
                    City = @"London",
                    Country = @"UK",
                    Phone = @"609-202-505",
                    HireDate = @"2010-03-22",
                    ID = 13,
                    Name = @"Trevor Ashworth",
                    Title = @"Director"
                }}

        });
        this.Add(new EmployeesNestedDataItem()
        {
            ID = 18,
            Age = 49,
            Salary = 77000,
            Productivity = 70,
            City = @"Manchester",
            Country = @"UK",
            Phone = @"222-555-577",
            HireDate = @"2014-01-22",
            Name = @"Victoria Lincoln",
            Title = @"Senior Accountant",
            Employees = new List<EmployeesNestedDataItem_EmployeesItem>()
            {
                new EmployeesNestedDataItem_EmployeesItem()
                {
                    Age = 43,
                    Salary = 70000,
                    Productivity = 80,
                    City = @"Hamburg",
                    Country = @"Germany",
                    Phone = @"609-444-555",
                    HireDate = @"2011-06-03",
                    ID = 23,
                    Name = @"Thomas Burke",
                    Title = @"Senior Accountant"
                },
                new EmployeesNestedDataItem_EmployeesItem()
                {
                    Age = 29,
                    Salary = 60000,
                    Productivity = 80,
                    City = @"Munich",
                    Country = @"Germany",
                    Phone = @"609-333-444",
                    HireDate = @"2009-06-19",
                    ID = 22,
                    Name = @"Michael Anderson",
                    Title = @"Junior Accountant"
                },
                new EmployeesNestedDataItem_EmployeesItem()
                {
                    Age = 31,
                    Salary = 90000,
                    Productivity = 80,
                    City = @"Warasw",
                    Country = @"Poland",
                    Phone = @"609-222-205",
                    HireDate = @"2014-08-18",
                    ID = 21,
                    Name = @"Roland Reyes",
                    Title = @"Accountant Team Lead"
                },
                new EmployeesNestedDataItem_EmployeesItem()
                {
                    Age = 35,
                    Salary = 70000,
                    Productivity = 70,
                    City = @"Koln",
                    Country = @"Germany",
                    Phone = @"609-502-525",
                    HireDate = @"2015-09-17",
                    ID = 24,
                    Name = @"Monica Mendel",
                    Title = @"Senior Software Developer"
                }}

        });
        this.Add(new EmployeesNestedDataItem()
        {
            ID = 10,
            Age = 61,
            Salary = 85000,
            Productivity = 890,
            City = @"Lyon",
            Country = @"France",
            Phone = @"259-266-887",
            HireDate = @"2010-01-01",
            Name = @"Yang Wang",
            Title = @"Localization Developer",
            Employees = new List<EmployeesNestedDataItem_EmployeesItem>()
            {
                new EmployeesNestedDataItem_EmployeesItem()
                {
                    Age = 31,
                    Salary = 90000,
                    Productivity = 80,
                    City = @"Warasw",
                    Country = @"Poland",
                    Phone = @"609-222-205",
                    HireDate = @"2014-08-18",
                    ID = 11,
                    Name = @"Monica Reyes",
                    Title = @"Software Development Team Lead"
                },
                new EmployeesNestedDataItem_EmployeesItem()
                {
                    Age = 35,
                    Salary = 70000,
                    Productivity = 70,
                    City = @"Koln",
                    Country = @"Germany",
                    Phone = @"609-502-525",
                    HireDate = @"2015-09-17",
                    ID = 6,
                    Name = @"Roland Mendel",
                    Title = @"Senior Software Developer"
                }}

        });
        this.Add(new EmployeesNestedDataItem()
        {
            ID = 35,
            Age = 35,
            Salary = 75000,
            Productivity = 75,
            City = @"Warasw",
            Country = @"Poland",
            Phone = @"688-244-844",
            HireDate = @"2014-01-22",
            Name = @"Janine Munoz",
            Title = @"HR",
            Employees = new List<EmployeesNestedDataItem_EmployeesItem>()
            {
                new EmployeesNestedDataItem_EmployeesItem()
                {
                    Age = 43,
                    Salary = 70000,
                    Productivity = 80,
                    City = @"Hamburg",
                    Country = @"Germany",
                    Phone = @"609-444-555",
                    HireDate = @"2011-06-03",
                    ID = 3,
                    Name = @"Michael Burke",
                    Title = @"Senior Software Developer"
                },
                new EmployeesNestedDataItem_EmployeesItem()
                {
                    Age = 31,
                    Salary = 90000,
                    Productivity = 80,
                    City = @"Warasw",
                    Country = @"Poland",
                    Phone = @"609-222-205",
                    HireDate = @"2014-08-18",
                    ID = 11,
                    Name = @"Monica Reyes",
                    Title = @"Software Development Team Lead"
                }}

        });
        this.Add(new EmployeesNestedDataItem()
        {
            ID = 10,
            Age = 49,
            Salary = 95000,
            Productivity = 80,
            City = @"Krakow",
            Country = @"Poland",
            Phone = @"677-266-555",
            HireDate = @"2010-01-01",
            Name = @"Yang Wang",
            Title = @"Sales Manager",
            Employees = new List<EmployeesNestedDataItem_EmployeesItem>()
            {
                new EmployeesNestedDataItem_EmployeesItem()
                {
                    Age = 29,
                    Salary = 60000,
                    Productivity = 80,
                    City = @"Munich",
                    Country = @"Germany",
                    Phone = @"609-333-444",
                    HireDate = @"2009-06-19",
                    ID = 2,
                    Name = @"Thomas Anderson",
                    Title = @"Senior Software Developer"
                },
                new EmployeesNestedDataItem_EmployeesItem()
                {
                    Age = 35,
                    Salary = 70000,
                    Productivity = 70,
                    City = @"Koln",
                    Country = @"Germany",
                    Phone = @"609-502-525",
                    HireDate = @"2015-09-17",
                    ID = 6,
                    Name = @"Roland Mendel",
                    Title = @"Senior Software Developer"
                }}

        });
    }
}csコピー

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 modules

namespace Infragistics.Samples
{
    public class Program
    {
        public static async 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(IgbInputModule),
                typeof(IgbPropertyEditorPanelModule),
                typeof(IgbTreeGridModule),
                typeof(IgbPaginatorModule)
            );
            await builder.Build().RunAsync();
        }
    }
}csコピー

@using IgniteUI.Blazor.Controls

<div class="container vertical ig-typography">
    <div class="container horizontal fill">
        <div class="container vertical" style="padding: 0.5rem;">
            <IgbTreeGrid
            AutoGenerate="false"
            Name="treeGrid"
            @ref="treeGrid"
            Id="treeGrid"
            Data="EmployeesNestedData"
            ChildDataKey="Employees"
            RowDraggable=true
            RowDragEndScript="OnTreeGridRowDragEndHandler"
            Width="100%"
            Height="100%"
           >
                <IgbColumn
                Field="Name"
                Header="Name"
                DataType="GridColumnDataType.String"
                Sortable="true"
                Editable="true"
                >
                </IgbColumn>

                <IgbColumn
                Field="HireDate"
                Header="Hire Date"
                DataType="GridColumnDataType.Date"
                Sortable="true"
                >
                </IgbColumn>

                <IgbColumn
                Field="Age"
                Header="Age"
                DataType="GridColumnDataType.Number"
                Sortable="true"
                >
                </IgbColumn>
            </IgbTreeGrid>
        </div>
        <div class="container vertical" style="padding: 0.5rem;">
            <IgbTreeGrid AutoGenerate="false"
                         Name="treeGrid2"
                         @ref="treeGrid2"
                         Id="treeGrid2"
                         Data="Data2"
                         EmptyGridMessage="Drag and Drop a row from the left grid to this grid"
                         ChildDataKey="Employees"
                         Width="100%"
                         Height="100%"
                         >
                <IgbColumn Field="Name"
                           Header="Name"
                           DataType="GridColumnDataType.String"
                           Sortable="true"
                           Editable="true"
                           >
                </IgbColumn>

                <IgbColumn Field="HireDate"
                           Header="Hire Date"
                           DataType="GridColumnDataType.Date"
                           Sortable="true"
                           >
                </IgbColumn>

                <IgbColumn Field="Age"
                           Header="Age"
                           DataType="GridColumnDataType.Number"
                           Sortable="true"
                           >
                </IgbColumn>
            </IgbTreeGrid>
        </div>
    </div>
</div>

@code {

    protected override async Task OnAfterRenderAsync(bool firstRender)
    {
        var treeGrid = this.treeGrid;
        var treeGrid2 = this.treeGrid2;

    }

    protected override void OnInitialized()
    {

        this.Data2 = new List<EmployeesNestedDataItem_EmployeesItem>() { };
    }

    private IgbTreeGrid treeGrid;
    private IgbTreeGrid treeGrid2;

    private List<EmployeesNestedDataItem_EmployeesItem> Data2 { get; set; }

    private EmployeesNestedData _employeesNestedData = null;
    public EmployeesNestedData EmployeesNestedData
    {
        get
        {
            if (_employeesNestedData == null)
            {
                _employeesNestedData = new EmployeesNestedData();
            }
            return _employeesNestedData;
        }
    }

}razorコピー

function addRowAndChildrenTreeGrid(row, newData) {
    if (newData.includes(row)) {
        return;
    }
    else if (newData.length > 0 && row.Employees) {
        for (let i = row.Employees.length; i >= 0; i--) {
            if (newData.includes(row.Employees[i])) {
                let index = newData.findIndex(element => element.ID === row.Employees[i].ID);
                if (index > -1) {
                    newData.splice(index, 1);
                }
            }
        }
    }

    for (let record of newData) {
        if (record.Employees && record.Employees.includes(row)) {
            return;
        }
    }

    newData.push(row);
}
function OnTreeGridRowDragEndHandler(evt) {
    const ghostElement = evt.detail.dragDirective.ghostElement;
    const dragElementPos = ghostElement.getBoundingClientRect();
    const gridPosition = treeGrid2.getBoundingClientRect();
    const withinXBounds = dragElementPos.x >= gridPosition.x && dragElementPos.x <= gridPosition.x + gridPosition.width;
    const withinYBounds = dragElementPos.y >= gridPosition.y && dragElementPos.y <= gridPosition.y + gridPosition.height;
    if (withinXBounds && withinYBounds) {
        const newData = [...treeGrid2.data];
        const draggedRowData = evt.detail.dragData.data;
        addRowAndChildrenTreeGrid(draggedRowData, newData);
        treeGrid2.data = newData;
    }
}

igRegisterScript("OnTreeGridRowDragEndHandler", OnTreeGridRowDragEndHandler, false);jsコピー

/*
CSS styles are loaded from the shared CSS file located at:
https://static.infragistics.com/xplatform/css/samples/
*/
cssコピー

Like this sample? Get access to our complete Ignite UI for Blazor toolkit and start building your own apps in minutes. Download it for free.

Configuration

Para habilitar el arrastre de filas para su IgbTreeGrid, todo lo que necesita hacer es establecer la cuadrícula RowDraggable en true. Una vez que esto esté habilitado, se mostrará un controlador de arrastre de fila en cada fila. Este controlador se puede utilizar para iniciar el arrastre de filas. Al hacer clic en el controlador de arrastre y mover el cursor mientras se mantiene presionado el botón, se activará el evento de RowDragStart la cuadrícula. Soltar el clic en cualquier momento hará que RowDragEnd se active el evento.

<IgbTreeGrid RowDraggable="true">
</IgbTreeGrid>
razor

Templating the Drag Icon

Se puede crear una plantilla para el icono del controlador de arrastre utilizando DragIndicatorIconTemplate de la cuadrícula. En el ejemplo que estamos creando, cambiemos el ícono predeterminado (drag_indicator) a drag_handle.

Para hacerlo, podemos usar el DragIndicatorIcon para pasar una plantilla dentro del cuerpo de the IgbTreeGrid:

<IgbTreeGrid Data="CustomersData" PrimaryKey="ID" RowDraggable="true" DragIndicatorIconTemplate="dragIndicatorIconTemplate" @ref="grid">
</IgbTreeGrid>

private RenderFragment<IgbGridEmptyTemplateContext> dragIndicatorIconTemplate = (context) =>
{
    return @<div>
        <IgbIcon IconName="drag_handle" Collection="material"></IgbIcon>
    </div>;
};
razor

Application Demo

Row Reordering Demo

Con la ayuda de los eventos de arrastre de filas de la cuadrícula, puede crear una cuadrícula que le permita reordenar las filas arrastrándolas.

<IgbTreeGrid Data="CustomersData" PrimaryKey="ID" RowDraggable="true" RowDragStartScript="WebTreeGridReorderRowStartHandler" RowDragEndScript="WebTreeGridReorderRowHandler"></IgbTreeGrid>
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.

Una vez que RowDraggable esté habilitado y se haya definido una zona de colocación, debe implementar un controlador simple para el evento de colocación. Cuando se arrastra una fila, verifique lo siguiente:

• ¿Se amplía la fila? Si es así, colapsarlo.
• ¿Se dejó caer la fila dentro de la cuadrícula?
• Si es así, ¿en qué otra fila se soltó la fila arrastrada?
• Una vez que haya encontrado la fila de destino, intercambie las ubicaciones de los registros en la matriz Data.
• ¿Se seleccionó inicialmente la fila? Si es así, márquelo como seleccionado.

A continuación, puedes ver esto implementado:

//in JavaScript
igRegisterScript("WebTreeGridReorderRowStartHandler", (args) => {
    const draggedRow = args.detail.dragElement;
    const row = this.treeGrid.getRowByIndex(draggedRow.getAttribute('data-rowindex'));
    if (row.expanded) {
        row.expanded = false;
    }
}, false);

igRegisterScript("WebTreeGridReorderRowHandler", (args) => {
    const ghostElement = args.detail.dragDirective.ghostElement;
    const dragElementPos = ghostElement.getBoundingClientRect();
    const grid = document.getElementsByTagName("igc-tree-grid")[0];
    const rows = Array.prototype.slice.call(document.getElementsByTagName("igx-tree-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
    const draggedRow = args.detail.dragData.data;
    const childRows = this.findChildRows(grid.data, draggedRow);
    //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);
    // reinsert the child rows
    childRows.reverse().forEach(childRow => {
        grid.data.splice(currRowIndex + 1, 0, childRow);
    });
}, false);

function findChildRows(rows, parent) {
    const childRows = [];
    rows.forEach(row => {
        if (row.ParentID === parent.ID) {
            childRows.push(row);
            // Recursively find children of current row
            const grandchildren = this.findChildRows(rows, row);
            childRows.push(...grandchildren);
        }
    });
    return childRows;
}

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) {
            // return the index of the targeted row
            return parseInt(row.attributes["data-rowindex"].value);
        }
    }
    return -1;
}
razor

¡Con estos sencillos pasos, ha configurado una cuadrícula que permite reordenar filas mediante arrastrar y soltar! Puede ver el código anterior en acción en la siguiente demostración.

Observe que también tenemos habilitada la selección de filas y conservamos la selección al soltar la fila arrastrada.

EXAMPLE

DATA

MODULES

RAZOR

JS

CSS

using System;
using System.Collections.Generic;
public class EmployeesNestedTreeDataItem
{
    public double Age { get; set; }
    public string HireDate { get; set; }
    public double ID { get; set; }
    public string Name { get; set; }
    public string Phone { get; set; }
    public bool OnPTO { get; set; }
    public double ParentID { get; set; }
    public string Title { get; set; }
}

public class EmployeesNestedTreeData
    : List<EmployeesNestedTreeDataItem>
{
    public EmployeesNestedTreeData()
    {
        this.Add(new EmployeesNestedTreeDataItem()
        {
            Age = 55,
            HireDate = @"2008-03-20",
            ID = 1,
            Name = @"Johnathan Winchester",
            Phone = @"0251-031259",
            OnPTO = false,
            ParentID = -1,
            Title = @"Development Manager"
        });
        this.Add(new EmployeesNestedTreeDataItem()
        {
            Age = 42,
            HireDate = @"2014-01-22",
            ID = 4,
            Name = @"Ana Sanders",
            Phone = @"(21) 555-0091",
            OnPTO = true,
            ParentID = -1,
            Title = @"CEO"
        });
        this.Add(new EmployeesNestedTreeDataItem()
        {
            Age = 49,
            HireDate = @"2014-01-22",
            ID = 18,
            Name = @"Victoria Lincoln",
            Phone = @"(071) 23 67 22 20",
            OnPTO = true,
            ParentID = -1,
            Title = @"Accounting Manager"
        });
        this.Add(new EmployeesNestedTreeDataItem()
        {
            Age = 61,
            HireDate = @"2010-01-01",
            ID = 10,
            Name = @"Yang Wang",
            Phone = @"(21) 555-0091",
            OnPTO = false,
            ParentID = -1,
            Title = @"Localization Manager"
        });
        this.Add(new EmployeesNestedTreeDataItem()
        {
            Age = 43,
            HireDate = @"2011-06-03",
            ID = 3,
            Name = @"Michael Burke",
            Phone = @"0452-076545",
            OnPTO = true,
            ParentID = 1,
            Title = @"Senior Software Developer"
        });
        this.Add(new EmployeesNestedTreeDataItem()
        {
            Age = 29,
            HireDate = @"2009-06-19",
            ID = 2,
            Name = @"Thomas Anderson",
            Phone = @"(14) 555-8122",
            OnPTO = false,
            ParentID = 1,
            Title = @"Senior Software Developer"
        });
        this.Add(new EmployeesNestedTreeDataItem()
        {
            Age = 31,
            HireDate = @"2014-08-18",
            ID = 11,
            Name = @"Monica Reyes",
            Phone = @"7675-3425",
            OnPTO = false,
            ParentID = 1,
            Title = @"Software Development Team Lead"
        });
        this.Add(new EmployeesNestedTreeDataItem()
        {
            Age = 35,
            HireDate = @"2015-09-17",
            ID = 6,
            Name = @"Roland Mendel",
            Phone = @"(505) 555-5939",
            OnPTO = false,
            ParentID = 11,
            Title = @"Senior Software Developer"
        });
        this.Add(new EmployeesNestedTreeDataItem()
        {
            Age = 44,
            HireDate = @"2009-10-11",
            ID = 12,
            Name = @"Sven Cooper",
            Phone = @"0695-34 67 21",
            OnPTO = true,
            ParentID = 11,
            Title = @"Senior Software Developer"
        });
        this.Add(new EmployeesNestedTreeDataItem()
        {
            Age = 44,
            HireDate = @"2014-04-04",
            ID = 14,
            Name = @"Laurence Johnson",
            Phone = @"981-443655",
            OnPTO = false,
            ParentID = 4,
            Title = @"Director"
        });
        this.Add(new EmployeesNestedTreeDataItem()
        {
            Age = 25,
            HireDate = @"2017-11-09",
            ID = 5,
            Name = @"Elizabeth Richards",
            Phone = @"(2) 283-2951",
            OnPTO = true,
            ParentID = 4,
            Title = @"Vice President"
        });
        this.Add(new EmployeesNestedTreeDataItem()
        {
            Age = 39,
            HireDate = @"2010-03-22",
            ID = 13,
            Name = @"Trevor Ashworth",
            Phone = @"981-443655",
            OnPTO = true,
            ParentID = 5,
            Title = @"Director"
        });
        this.Add(new EmployeesNestedTreeDataItem()
        {
            Age = 44,
            HireDate = @"2014-04-04",
            ID = 17,
            Name = @"Antonio Moreno",
            Phone = @"(505) 555-5939",
            OnPTO = false,
            ParentID = 18,
            Title = @"Senior Accountant"
        });
        this.Add(new EmployeesNestedTreeDataItem()
        {
            Age = 50,
            HireDate = @"2007-11-18",
            ID = 7,
            Name = @"Pedro Rodriguez",
            Phone = @"035-640230",
            OnPTO = false,
            ParentID = 10,
            Title = @"Senior Localization Developer"
        });
        this.Add(new EmployeesNestedTreeDataItem()
        {
            Age = 27,
            HireDate = @"2016-02-19",
            ID = 8,
            Name = @"Casey Harper",
            Phone = @"0342-023176",
            OnPTO = true,
            ParentID = 10,
            Title = @"Senior Localization"
        });
        this.Add(new EmployeesNestedTreeDataItem()
        {
            Age = 25,
            HireDate = @"2017-11-09",
            ID = 15,
            Name = @"Patricia Simpson",
            Phone = @"069-0245984",
            OnPTO = false,
            ParentID = 7,
            Title = @"Localization Intern"
        });
        this.Add(new EmployeesNestedTreeDataItem()
        {
            Age = 39,
            HireDate = @"2010-03-22",
            ID = 9,
            Name = @"Francisco Chang",
            Phone = @"(91) 745 6200",
            OnPTO = false,
            ParentID = 7,
            Title = @"Localization Intern"
        });
        this.Add(new EmployeesNestedTreeDataItem()
        {
            Age = 25,
            HireDate = @"2018-03-18",
            ID = 16,
            Name = @"Peter Lewis",
            Phone = @"069-0245984",
            OnPTO = true,
            ParentID = 7,
            Title = @"Localization Intern"
        });
    }
}csコピー

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 modules

namespace Infragistics.Samples
{
    public class Program
    {
        public static async 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(IgbInputModule),
                typeof(IgbTreeGridModule)
            );
            await builder.Build().RunAsync();
        }
    }
}csコピー

@using IgniteUI.Blazor.Controls

@inject IJSRuntime JS

<div class="container vertical ig-typography">
    <div class="container vertical fill">
        <IgbTreeGrid
        AutoGenerate="false"
        Name="treeGrid"
        @ref="treeGrid"
        Id="treeGrid"
        Data="EmployeesNestedTreeData"
        PrimaryKey="ID"
        ForeignKey="ParentID"
        RowDragStartScript="WebTreeGridReorderRowStartHandler"
        RowDraggable="true"
        RowDragEndScript="WebTreeGridReorderRowHandler">
            <IgbColumn
            Field="Name"
            Header="Full Name"
            DataType="GridColumnDataType.String"
            Resizable="true"
            Sortable="true"
            Filterable="true"
            Editable="true">
            </IgbColumn>

            <IgbColumn
            Field="Age"
            DataType="GridColumnDataType.Number"
            Resizable="false"
            Sortable="false"
            Filterable="false"
            Editable="true">
            </IgbColumn>

            <IgbColumn
            Field="Title"
            DataType="GridColumnDataType.String"
            Resizable="true"
            Sortable="true"
            Filterable="true"
            Editable="true">
            </IgbColumn>

            <IgbColumn
            Field="HireDate"
            Header="Hire Date"
            DataType="GridColumnDataType.Date"
            Resizable="true"
            Sortable="true"
            Filterable="true"
            Editable="true">
            </IgbColumn>

        </IgbTreeGrid>

    </div>
</div>

@code {
    

    protected override async Task OnAfterRenderAsync(bool firstRender)
    {
        var treeGrid = this.treeGrid;

    }

    private IgbTreeGrid treeGrid;

    private EmployeesNestedTreeData _employeesNestedTreeData = null;
    public EmployeesNestedTreeData EmployeesNestedTreeData
    {
        get
        {
            if (_employeesNestedTreeData == null)
            {
                _employeesNestedTreeData = new EmployeesNestedTreeData();
            }
            return _employeesNestedTreeData;
        }
    }

}razorコピー

igRegisterScript("WebTreeGridReorderRowStartHandler", (args) => {
    const draggedRow = args.detail.dragElement;
    const row = this.treeGrid.getRowByIndex(draggedRow.getAttribute('data-rowindex'));
    if (row.expanded) {
        row.expanded = false;
    }
}, false);

igRegisterScript("WebTreeGridReorderRowHandler", (args) => {
    const ghostElement = args.detail.dragDirective.ghostElement;
    const dragElementPos = ghostElement.getBoundingClientRect();
    const grid = document.getElementsByTagName("igc-tree-grid")[0];
    const rows = Array.prototype.slice.call(document.getElementsByTagName("igx-tree-grid-row"));
    const currRowIndex = this.getCurrentRowIndex(rows,
    { x: dragElementPos.x, y: dragElementPos.y });
    if (currRowIndex === -1) { return; }
    const draggedRow = args.detail.dragData.data;
    const childRows = this.findChildRows(grid.data, draggedRow);
    //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);
    // reinsert the child rows
    childRows.reverse().forEach(childRow => {
        grid.data.splice(currRowIndex + 1, 0, childRow);
    });
}, false);

function findChildRows(rows, parent) {
    const childRows = [];
    rows.forEach(row => {
        if (row.ParentID === parent.ID) {
            childRows.push(row);
            // Recursively find children of current row
            const grandchildren = this.findChildRows(rows, row);
            childRows.push(...grandchildren);
        }
    });
    return childRows;
}

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) {
            // return the index of the targeted row
            return parseInt(row.attributes["data-rowindex"].value);
        }
    }
    return -1;
}

jsコピー

/*
CSS styles are loaded from the shared CSS file located at:
https://static.infragistics.com/xplatform/css/samples/
*/
cssコピー

Limitations

Actualmente, no existen limitaciones conocidas para RowDraggable.

API References

• RowDraggable
• RowDragStart
• RowDragEnd
• IgbTreeGrid

Additional Resources

Nuestra comunidad es activa y siempre da la bienvenida a nuevas ideas.

• Ignite UI for Blazor Foros
• Ignite UI for Blazor GitHub