RadOpenFileDialog or RadSaveFileDialog with Filter, for example fileDialog.Filter = "Excel Worksheets|*.xlsx;*.xls|All Files|*.*"; fileDialog.FilterIndex = 1; This should filter the files in MainPane on load to xls files only (index is 1-based). However, filter is not applied on load - regression in R3 2018.
Hi, The fix for the issue will be available in next LIB version (2018.3.917). It will also be included in our official version – R3 2018 SP1, scheduled for the mid of October, 2018. Best regards, Ralitsa Kumanova