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Gets or sets the currently selected item.
Not fully supported by the *.ssjson and *.sjs format. ArgumentOutOfRangeException could occur if Items lost data.
T SelectedItem { get; set; }
Property SelectedItem As T
ISelector<DropDownItem> selector = worksheet.Controls.AddDropDown(20, 20, 120, 20);
selector.Items.Add(new DropDownItem("Pending"));
selector.Items.Add(new DropDownItem("Approved"));
selector.SelectedItem = selector.Items[1];
DropDownItem selectedItem = selector.SelectedItem;