<TelerikGrid Data=@GridData Pageable="true"
             SelectedItems="@SelectedItems"
             SelectionMode="GridSelectionMode.Multiple">
    <RowTemplate Context="employee">
        <td>
            <TelerikCheckBox Value="@employee.IsSelected" ValueChanged="@((bool value) => ChangeHandler(value, employee.EmployeeId))" />
        </td>
        <td>
            <img class="rounded-circle" src="@($"images/{employee.EmployeeId}.jpg")" alt="Alternate Text" />
            @employee.Name
        </td>
        <td>
            @employee.Team
        </td>
    </RowTemplate>
    <GridColumns>
        <GridColumn Title="Select" />
        <GridColumn Field=@nameof(Employee.Name) />
        <GridColumn Field=@nameof(Employee.Team) Title="Team" />
    </GridColumns>
</TelerikGrid>

@if (SelectedItems != null)
{
    <ul>
        @foreach (Employee employee in SelectedItems)
        {
            <li>
                @employee.Name
            </li>
        }
    </ul>
}

@code{
    public List<Employee> GridData { get; set; }
    public IEnumerable<Employee> SelectedItems { get; set; } = Enumerable.Empty<Employee>();

    protected override void OnInitialized()
    {
        GridData = new List<Employee>();
        for (int i = 0; i < 15; i++)
        {
            GridData.Add(new Employee()
            {
                EmployeeId = i,
                Name = "Employee " + i.ToString(),
                Team = "Team " + i % 3
            });
        }

        // select Employee with 3 through 5. Not required
        SelectedItems = GridData.Skip(2).Take(3).ToList();
        foreach (var item in SelectedItems)
        {
            item.IsSelected = true;
        }
    }

    void ChangeHandler(bool isSelected, int employeeId)
    {
        Employee currEmployee = GridData.Where(empl => empl.EmployeeId == employeeId).First();
        if (currEmployee != null)
        {
            //update the model first
            currEmployee.IsSelected = isSelected;
            
            //handle selected items collection
            var itemsToSelect = SelectedItems.ToList();
            if (isSelected)
            {
                itemsToSelect.Add(currEmployee);
            }
            else
            {
                itemsToSelect.Remove(currEmployee);
            }
            SelectedItems = new List<Employee>(itemsToSelect);
        }
    }

    public class Employee
    {
        public int EmployeeId { get; set; }
        public string Name { get; set; }
        public string Team { get; set; }
        // for row selection with a row template
        public bool IsSelected { get; set; }
    }
}