<TelerikGrid Data=@MyData EditMode="@GridEditMode.Incell" Pageable="true" Height="500px" Navigable="true"
             OnUpdate="@UpdateHandler" OnDelete="@DeleteHandler" OnCreate="@CreateHandler">
    <GridToolBar>
        <GridCommandButton Command="Add" Icon="add">Add Employee</GridCommandButton>
    </GridToolBar>
    <GridColumns>
        <GridColumn Field=@nameof(SampleData.ID) Title="ID" Editable="false" />
        <GridColumn Field=@nameof(SampleData.Name) Title="Name" />
        <GridColumn Field=@nameof(SampleData.OnLeave) Title="On Leave" />
        <GridCommandColumn>
            <GridCommandButton Command="Save" Icon="save" ShowInEdit="true">Update</GridCommandButton>
            <GridCommandButton Command="Delete" Icon="delete">Delete</GridCommandButton>
        </GridCommandColumn>
    </GridColumns>
</TelerikGrid>

@code {
    async Task UpdateHandler(GridCommandEventArgs args)
    {
        string fieldName = args.Field;
        object newVal = args.Value;

        SampleData item = (SampleData)args.Item; 

        var index = MyData.FindIndex(i => i.ID == item.ID);
        if (index != -1)
        {
            MyData[index] = item;
        }
    }

    async Task CreateHandler(GridCommandEventArgs args)
    {
        SampleData item = (SampleData)args.Item;
        item.ID = MyData.Count + 1;
        MyData.Insert(0, item);
    }

    async Task DeleteHandler(GridCommandEventArgs args)
    {
        SampleData item = (SampleData)args.Item;
        MyData.Remove(item);
    }

    public class SampleData
    {
        public int ID { get; set; }
        public string Name { get; set; }
        public bool OnLeave { get; set; }
    }

    public List<SampleData> MyData { get; set; }

    protected override void OnInitialized()
    {
        MyData = new List<SampleData>();

        for (int i = 0; i < 50; i++)
        {
            MyData.Add(new SampleData()
            {
                ID = i,
                Name = "Name " + i.ToString(),
                OnLeave = i % 3 == 0
            });
        }
    }
}