By design when you hit the Add More Files
button - the current Items
collection of the RadUpload
control gets cleared in order to be re-populated after all selected files pass certain checks. This is not considered a bug but rather an implementation decision. And this behavior is causing the issue you described. However, your feedback on the matter raised a new discussion and we decided to add a feature request
for changing this behavior of the control. And if the feature gathers enough popularity, we will definitely consider its implementation.
In the meantime, you can try binding the SelectedItem
of the ComboBoxes
to business items in order to keep the selection but I'm not sure if this approach would be suitable for your needs.
the Telerik team
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