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Vote

DropDownList will not fire ValueChange event on selection

I have a situation where I'm trying to make a configurable list of selections. The selection is 2-part - first you pick a main category, then you pick a specific item in that category, so two dropdowns. I've made it such that the second dropdown only appears when the first item has been selected. Also, the user can decide how many configurations to add - so there's a button to add additional pairs as well.

The second dropdown does not seem to work correctly. It will appear as expected when the category is picked, with the correct items, but it will not let you actually select anything.

Attached is a Blazor project where the error can be seen.

Step 1: Navigate to the bug page.

Step 2: Select an item in the first dropdown. The second will appear.

Step 3: Select an item in the second dropdown. The item does not show up in the selection window, but shows as selected if you reopen the dropdown.


The same issue can be seen on the ComboBox component as well.