舍入WPF绑定中的值

Question

I'm attempting to implement a progress bar with a textbox on top that also displays the progress %. However the percentage is fractional. Is it possible to round a value returned in the dataset via the binding or does it have to be done via the code behind?

<ProgressBar Grid.Row="2" Grid.ColumnSpan="2" Height="25" HorizontalAlignment="Stretch"  Margin="5,5,5,2" Name="pbProgressIndex" VerticalAlignment="Top" Width="Auto" Value="{Binding Path=ProgressIndex, Mode=OneWayToSource}" />
<TextBlock Grid.Row="2" Grid.ColumnSpan="2" Height="25" Name="txtProgressIndex" Text="{Binding Path=ProgressIndex, Mode=OneWayToSource}" Width="Auto" Foreground="Black" FontWeight="Bold" FontSize="14" FontFamily="Verdana" Padding="5" Margin="5,5,5,5" TextAlignment="Center" />

Answer 1

使用绑定的StringFormat属性，例如：

{Binding Path=ProgressIndex, Mode=OneWayToSource, StringFormat=2N}

Answer 2

StringFormat={}{0:#.00}

它对我来说看起来更好;）

Answer 3

In addition to the StringFormat in Femaref's answer you need to get rid of the Mode=OneWayToSource settings. That mode is for pushing values from a control to a bound object (like a ViewModel) without receiving updates made to the value from code, which is the opposite of what you're trying to do. You want the OneWay mode for these which happens to be the default for both the TextBlock.Text. ProgressBar.Value used TwoWay by default, which will still work fine in this case, but you can also set it to Mode=OneWay .