Dropdown not showing selected item

Radzen.Blazor Components
1

I'm pretty new to Blazor/Radzen environment and I know I'm not the sharpest clam in the bucket but I still can't figure this out. In all the sample code I could find it didn't seem like the OnChange event needed to do anything to set the SelectedText other than invoking StateHasChanged

I have a List of Properties, the two important fields are string WAddressDisplay and double PropID.
The Dropdown populates perfectly. I can select the item I want and the OnChange fires perfectly but the selection doesn't show up in the Dropdown selection. I know the item is properly selected because the OnChange returns the correct item.

Here's my HTML for the dropdown

   <RadzenDropDown AllowClear="true" TValue="string"
              Name="pAddress" AllowFiltering="true"
              @bind-Value=@boundValue
              Data=@PropertyList
              TextProperty="WAddressDisplay" 
              ValueProperty="PropID"
              Change=@(args => OnChange(args, "newAddress")) Class="w-100">
   </RadzenDropDown>

Here is my OnChange

double boundValue = 0;
   ...
    void OnChange(object value, string name)
    {
        var str = value is IEnumerable<object> ? string.Join(", ", (IEnumerable<object>)value) : value;
        if (name == "newAddress")
        {
            if (str != null)
            {
                propertyLink = boundValue;
                buttonOKDisabled = false;
                InvokeAsync(StateHasChanged);
            }
            else
            {
                boundValue = 0;
                propertyLink = "";
                buttonOKDisabled = true;
            }
        }
    }

This is my PropertyDTO (abbreviated)

  public class PropertyLookupDto
    {
        public int Id { get; set; }
        [Required]
        [StringLength(4)]
        public string Town { get; set; } = null!;
        public double PropId { get; set; }
        [StringLength(40)]
        public string WAddressDisplay { get; set; }
    }

Selecting an item:
image

Results after selecting an item:
image

OK button has been enabled and the PropID has been properly selected, it's just the selected text is still blank :frowning:

2

To set the selection of RadzenDropDownList you should use its Value property. Or @bind-Value if you want RadzenDropDown to update the property too. Check the dropdown demos for further reference: Blazor DropDown component

3

I added a @bind-Value as suggested and that did clean up my OnChange logic a little so that's great but the Dropdown Selected Item area is still blank. All the logic in the actual code is working perfectly.

I updated the original post with the new code and sample snapshots of the issue.

Let me know if more details might be helpful.
Any suggestions would be greatly appreciated.

4

What are the values of PropId? Are they unique?