devexpress-wpf

问题 I create DevExpress GridControl. Here full code of GroupBox and GridControl, because i do not know why it shows empty tooltip. I try to make many changes at code, read DevExpress forum but it not work. <GroupBox Grid.Row="0"> <GroupBox.Header> <TextBlock FontWeight="Bold" Text="GroupBox"/> </GroupBox.Header> <Grid ScrollViewer.CanContentScroll="True" ScrollViewer.HorizontalScrollBarVisibility="Auto" ScrollViewer.VerticalScrollBarVisibility="Auto" > <Grid.RowDefinitions> <RowDefinition Height=

问题 File Name SampleProject My xaml file Mainwindow.xaml---------- <Window x:Class="SampleProject.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:dxdo="http://schemas.devexpress.com/winfx/2008/xaml/docking" Closing="Window_Closing" Title="MainWindow" Height="800" Width="800" WindowState="Maximized"> <Grid> <dxdo:DockLayoutManager x:Name="docklayoutmanager1" dxdo:RestoreLayoutOptions.RemoveOldPanels="False"