Hi! Using Radzen Blazor 1.56.2, with application set to use .NET 9 (but I have .NET 10 installed), I’ve ran into a bizarre problem: I have set up two dropdowns, where the second (Division) will appear once the first (Department) is populated. The Division does appear appropriately, but the selected Department value does not appear in it.
If I remove the “Change="@DropDown0Change"“ parameter calling the event, then the selected department name DOES appear.
If I go into the event “protected async System.Threading.Tasks.Task DropDown0Change(System.Object args)” and delete everything between the {} brackets, it makes no difference at all.
Default appearance:
Once a department is chosen:
“Department” dropdown’s selected value doesn’t appear, but the clear “X” button does. (Codebehind shows the selected value as well, this appears to be a front-end problem.)
Why could this be happening?
Any help would be much appreciated,
thanks!
Hi @david.cole,
This could happen if:
- There is an exception happening after selecting the first value - check Radzen's Output pane and your browser developer tools.
- One or both of the dropdowns are somewhat misconfigured - check if TextProperty and ValueProperty are correctly set to an existing property name.
If you need further help please provide the source code. Check the FAQ for tips how to format code blocks in our forum.
Thanks, I will check the FAQ and try some things - I could have configured something incorrectly. Will update this thread in a couple of days or so as I try to work this out. (I did look at the output pane in Radzen then in Visual Studio, there were no exceptions thrown, and text/value properties are correctly set, so this issue is definitely odd. )
Found the problem: The ID field had one letter that was in uppercase when it should have been lowercase. Very subtle issue, but it’s now working! Thanks again for replying! 
