Create a Custom Command Column

In the following code, command-editing is a custom command column. It displays links that redirect a user to a separate page for editing. The column is configured using a cellTemplate. Note that it is an unbound column, that is, it does not have the dataField specified.

jQuery
JavaScript
$(function(){
    $("#treeListContainer").dxTreeList({
        dataSource: [
            { id: '1', fullName: "John Heart", position: "CEO" },
            // ... 
        ],
        columns: [
            "fullName", "position", 
            {
                name: "command-editing",
                allowFiltering: false,
                allowSorting: false,
                cellTemplate: function(cellElement, cellInfo) {
                    cellElement.append("<a href='./edit?id=" + cellInfo.data.id + "'>Edit</a>");
                }
            }
        ]
    });

});
Angular
HTML
TypeScript
<dx-tree-list 
    [dataSource]="dataSource">        
    <dxi-column dataField="fullName"></dxi-column>
    <dxi-column dataField="position"></dxi-column>
    <dxi-column
        name="command-editing"
        [allowFiltering]="false"
        [allowSorting]="false" 
        cellTemplate="cellTemplate">
        <div *dxTemplate="let data of 'cellTemplate'">
            <a [routerLink]="['/edit']" [queryParams]="{ id: data.data.id }">Edit</a>
        </div>
    </dxi-column>
</dx-tree-list>
// app.component.ts
import { dxTreeListModule } from "devextreme-angular";
import { AppRoutingModule } from "./app-routing.module";
// ...    
export class AppComponent {
    dataSource = [
        { id: '1', fullName: "John Heart", position: "CEO" },
        // ... 
    ];
} 
@NgModule({
    imports: [
        dxTreeListModule
        // ...
    ],
    // ...
})
TypeScript
// app-routing.module.ts
import { RouterModule, Routes } from "@angular/router";
import { APP_BASE_HREF } from "@angular/common";
// ...    
const routes: Routes = [
    { path: '', redirectTo: '/yourBaseRoot', pathMatch: 'full' },
    { path: 'edit', component: YourEditComponent }
];
@Component({
    // ...
    providers: [
        { provide: APP_BASE_HREF, useValue : '/yourBaseRoot' },
        // ...
    ]
})  
@NgModule({
    imports: [
        RouterModule.forRoot(routes)
        // ...
    ],
    // ...
})
export class AppRoutingModule { }
ASP.NET MVC Controls
Razor C#
@(Html.DevExtreme().TreeList()
    .ID("treeList")
    .DataSource(new object[] {
        new { 
            id = "1", 
            fullName = "John Heart", 
            position = "CEO" 
        }
        // ...
    })
    .Columns(columns => {
        columns.Add().DataField("fullName");
        columns.Add().DataField("position");
        columns.Add().Name("command-editing")
            .AllowFiltering(false)
            .AllowSorting(false)
            .CellTemplate(@<text>
                <a href="@Url.Action("Edit")?id=<%= data.id %>">Edit</a>
            </text>);
    })
)

You can also customize the built-in command columns. See the Command Columns topic for more details.