WPF TextBlock 文字超长截断并显示省略符号

　　

   <TextBlock x:Name="txtTest" Grid.Column="" FontSize="9pt" Margin="0 2 0 0 " VerticalAlignment="Center" Foreground="#b9b9b9"

                           ScrollViewer.HorizontalScrollBarVisibility="Disabled"

                           ScrollViewer.VerticalScrollBarVisibility="Disabled"

                           TextTrimming="CharacterEllipsis"

                           ToolTip="{Binding Text,ElementName=txtTest}"

                           Text="超长文本" />

TextTrimming="CharacterEllipsis"这个属性，会自动截断文本溢出部分（前提是TextBlock宽度不是auto）