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No Data Template

The NoDataTemplate allows you to define custom content when the TreeList has no data to show. It lets you change the default No records available localizable text.

Custom content for an empty TreeList

Use the NoDataTemplate to override the message shown while the data is still loading or when you try to filter a non-existing item

@* The example showcases a TreeList with a delay upon initializing its data and filtering on non-existing data *@

<TelerikTreeList Data="@Data"
                 ItemsField="DirectReports"
                 HasChildrenField="HasReports"
                 Pageable="true"
                 Sortable="true"
                 FilterMode="@TreeListFilterMode.FilterMenu"
                 Width="830px" Height="400px">
    <TreeListToolBar>
        <TreeListCommandButton OnClick="@LoadData">Add Data</TreeListCommandButton>
    </TreeListToolBar>
    <TreeListColumns>
        <TreeListColumn Expandable="true" Field="Position" Width="400px" />
        <TreeListColumn Field="FirstName" Width="200px" />
        <TreeListColumn Field="LastName" Width="200px" />
        <TreeListColumn Field="EmployeeId" Width="200px" />
    </TreeListColumns>
    <NoDataTemplate>
        <strong>No Data available / The data is still loading...</strong>
    </NoDataTemplate>
</TelerikTreeList>
@code {
    public class EmployeeHierarchical
    {
        public int EmployeeId { get; set; }
        public string FirstName { get; set; }
        public string LastName { get; set; }
        public string Position { get; set; }
        public List<EmployeeHierarchical> DirectReports { get; set; }
        public bool HasReports { get; set; }
    }

    public List<EmployeeHierarchical> Data { get; set; }

    protected async Task LoadData()
    {
        Data = await GetEmployees();
    }

    async Task<List<EmployeeHierarchical>> GetEmployees()
    {
        await Task.Delay(2000);

        List<EmployeeHierarchical> sampleData = new List<EmployeeHierarchical>();

        EmployeeHierarchical theCEO = new EmployeeHierarchical
        {
            EmployeeId = 1,
            FirstName = "Daryl",
            LastName = "Sweeney",
            Position = "CEO",
            HasReports = true
        };

        theCEO.DirectReports = new List<EmployeeHierarchical>
        {
            new EmployeeHierarchical
            {
                EmployeeId = 2,
                FirstName = "Guy",
                LastName = "Wooten",
                Position = "Chief Technical Officer",
                HasReports = true
            },
            new EmployeeHierarchical
            {
                EmployeeId = 3,
                FirstName = "Nevada",
                LastName = "Hart",
                Position = "Chief Financial Officer",
                HasReports = true,
                DirectReports = new List<EmployeeHierarchical>
                {
                    new EmployeeHierarchical
                    {
                        EmployeeId = 24,
                        FirstName = "Zena",
                        LastName = "Stanford",
                        Position = "VP, Finance"
                    }
                }
            }
        };

        theCEO.DirectReports[0].DirectReports = new List<EmployeeHierarchical>
        {
            new EmployeeHierarchical
            {
                EmployeeId = 4,
                FirstName = "Buffy",
                LastName = "Weber",
                Position = "VP, Engineering",
                HasReports = true,
                DirectReports = new List<EmployeeHierarchical>
                {
                    new EmployeeHierarchical
                    {
                        EmployeeId = 6,
                        FirstName = "Hyacinth",
                        LastName = "Hood",
                        Position = "Team Lead",
                        HasReports = true,
                        DirectReports = new List<EmployeeHierarchical>
                        {
                            new EmployeeHierarchical
                            {
                                EmployeeId = 7,
                                FirstName = "Akeem",
                                LastName = "Carr",
                                Position = "Software Developer, Junior"
                            },
                            new EmployeeHierarchical
                            {
                                EmployeeId = 8,
                                FirstName = "Rinah",
                                LastName = "Simon",
                                Position = "Software Developer"
                            }
                        }
                    },
                    new EmployeeHierarchical
                    {
                        EmployeeId = 9,
                        FirstName = "Gage",
                        LastName = "Daniels",
                        Position = "Software Architect"
                    },
                    new EmployeeHierarchical
                    {
                        EmployeeId = 10,
                        FirstName = "Constance",
                        LastName = "Vazquez",
                        Position = "Director, Engineering",
                        HasReports = true,
                        DirectReports = new List<EmployeeHierarchical>
                        {
                            new EmployeeHierarchical
                            {
                                EmployeeId = 11,
                                FirstName = "Darrel",
                                LastName = "Solis",
                                Position = "Team Lead",
                                HasReports = true,
                                DirectReports = new List<EmployeeHierarchical>
                                {
                                    new EmployeeHierarchical
                                    {
                                        EmployeeId = 12,
                                        FirstName = "Brian",
                                        LastName = "Yang",
                                        Position = "Software Developer, Senior"
                                    },
                                    new EmployeeHierarchical
                                    {
                                        EmployeeId = 13,
                                        FirstName = "Lillian",
                                        LastName = "Bradshaw",
                                        Position = "Software Developer"
                                    },
                                    new EmployeeHierarchical
                                    {
                                        EmployeeId = 14,
                                        FirstName = "Keiko",
                                        LastName = "Espinoza",
                                        Position = "QA Engineer, Junior"
                                    }
                                }
                            }
                        }
                    }
                }
            },
            new EmployeeHierarchical
            {
                EmployeeId = 5,
                FirstName = "Skyler",
                LastName = "Cleveland",
                Position = "VP, Engineering",
                HasReports = true,
                DirectReports = new List<EmployeeHierarchical>
                {
                    new EmployeeHierarchical
                    {
                        EmployeeId = 16,
                        FirstName = "Karleigh",
                        LastName = "Garza",
                        Position = "Team Lead",
                        HasReports = true,
                        DirectReports = new List<EmployeeHierarchical>
                        {
                            new EmployeeHierarchical
                            {
                                EmployeeId = 17,
                                FirstName = "Elmo",
                                LastName = "Tyson",
                                Position = "Software Developer"
                            },
                            new EmployeeHierarchical
                            {
                                EmployeeId = 18,
                                FirstName = "Stacey",
                                LastName = "Lynn",
                                Position = "QA Engineer",
                                HasReports = true,
                                DirectReports = new List<EmployeeHierarchical>
                                {
                                    new EmployeeHierarchical
                                    {
                                        EmployeeId = 19,
                                        FirstName = "Meredith",
                                        LastName = "Parish",
                                        Position = "QA Engineer, Junior"
                                    }
                                }
                            },
                            new EmployeeHierarchical
                            {
                                EmployeeId = 20,
                                FirstName = "Martha",
                                LastName = "Sargent",
                                Position = "Software Developer, Senior"
                            },
                            new EmployeeHierarchical
                            {
                                EmployeeId = 21,
                                FirstName = "Cassady",
                                LastName = "Whitley",
                                Position = "Software Developer"
                            },
                            new EmployeeHierarchical
                            {
                                EmployeeId = 22,
                                FirstName = "Haviva",
                                LastName = "Campbell",
                                Position = "Support Officer"
                            },
                            new EmployeeHierarchical
                            {
                                EmployeeId = 23,
                                FirstName = "Cameron",
                                LastName = "Ayers",
                                Position = "Support Officer"
                            }
                        }
                    }
                }
            }
        };

        sampleData.Add(theCEO);

        return await Task.FromResult(sampleData);
    }
}

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