When you select a date in DropDownList with dates in it (List<DateTime>), the @bind-Value is shaving off the milliseconds.
===ADMIN EDIT===
In the meantime, as a workaround for displaying milliseconds correctly, you can bind the DropDownList to a model. This way, you can use the "Id" to retrieve the selected item and display its precise milliseconds. Below is an example I've prepared to demonstrate this approach:
Selected value: @myDdlData.ToList().Where(x => x.Id == selectedValueId).FirstOrDefault()?.MyValueField.ToString("MM/dd/yyyy HH:mm:ss.fff")
<br />
<TelerikDropDownList Data="@myDdlData"
TextField="MyTextField"
ValueField="Id"
@bind-Value="selectedValueId">
</TelerikDropDownList>
@code {
public class MyDdlModel
{
public int Id { get; set; }
public DateTime MyValueField { get; set; }
public string MyTextField => MyValueField.ToString("MM/dd/yyyy HH:mm:ss.fff"); // Display formatted DateTime
}
private int selectedValueId { get; set; } = 1;
private IEnumerable<MyDdlModel> myDdlData = GenerateRandomDateTimes(20);
private static IEnumerable<MyDdlModel> GenerateRandomDateTimes(int count)
{
Random random = new Random();
DateTime startDate = DateTime.Now;
return Enumerable.Range(1, count)
.Select(x => new MyDdlModel
{
Id = x, // Unique integer Id
MyValueField = startDate.AddDays(x)
.AddMinutes(random.Next(0, 60))
.AddSeconds(random.Next(0, 60))
.AddMilliseconds(random.Next(0, 1000))
}).ToList();
}
}
I have a cascading DropDownList scenario with virtual scrolling. When the first DropDownList changes value, the second one should reset its scrollbar to the top, because it now contains new data. This doesn't happen.
Here is a REPL test page.
===
ADMIN EDIT
===
As a workaround for the time being, you may track when the value is changed in the parent DropDownList to dispose and re-initialize the child DropDownList.
Here is an example: https://blazorrepl.telerik.com/mdafHabk585ZtzyV54.