Wpf日历组合框多重绑定 [英] Wpf calendar combobox multibinding

问题描述

你好，

我有一个WPF，C＃问题。我想将组合框值放入日历中



WPF代码：

< ComboBox Name = cbWorkerHorizo​​ntalAlignment =LeftMargin =96,10,0,0VerticalAlignment =TopWidth =198
 ItemsSource ={Binding Path = Companies}SelectedItem ={Binding Path = Company }> 
< / ComboBox> 
 
< Label Content ={Binding Path = Company}Horizo​​ntalAlignment =LeftMargin =10,6,0,0VerticalAlignment =Top/> 
 
< Calendar Name =KalenderTag ={Binding Path = Company}SelectedDatesChanged =Calendar_SelectedDatesChangedHorizo​​ntalAlignment =LeftMargin =10,10,10,10VerticalAlignment =顶部> 
< Calendar.CalendarDayButtonStyle> 
< Style TargetType ={x：Type CalendarDayButton}> 
< Setter Property =Background> 
< Setter.Value> 
< MultiBinding Converter ={StaticResource formatterView}> 
< Binding Path =Company/> 
< Binding Path =Date/> 
< / MultiBinding> 
< /Setter.Value> 
< / Setter> 
< / Style> 
< /Calendar.CalendarDayButtonStyle> 
< / Calendar> 

问题是Label显示正确的值，但多重绑定显示{DependencyProperty。 ComboBox值的UnsetValue}。



我尝试过：



显示值的标签，但它有效，只有多重绑定不起作用。

解决方案

我在Binding FallbackValue =添加了它的工作原理

Hello,
i hava got a WPF, C# problem. I want to get the combobox value into the calendar

The WPF Code:

  <ComboBox Name="cbWorker" HorizontalAlignment="Left" Margin="96,10,0,0" VerticalAlignment="Top" Width="198"
   ItemsSource="{Binding Path=Companies}" SelectedItem="{Binding Path=Company}"  >
                  </ComboBox>

 <Label Content="{Binding Path=Company}" HorizontalAlignment="Left" Margin="10,6,0,0" VerticalAlignment="Top"/>

<Calendar Name="Kalender" Tag="{Binding Path=Company}" SelectedDatesChanged="Calendar_SelectedDatesChanged" HorizontalAlignment="Left" Margin="10,10,10,10" VerticalAlignment="Top">
                <Calendar.CalendarDayButtonStyle>
                    <Style TargetType="{x:Type CalendarDayButton}">
                        <Setter Property="Background" >
                            <Setter.Value>
                                <MultiBinding Converter="{StaticResource formatterView}">
                                    <Binding Path="Company" />
                                    <Binding Path="Date" />
                                </MultiBinding>
                            </Setter.Value>
                        </Setter>
                    </Style>
                </Calendar.CalendarDayButtonStyle>
            </Calendar>

The problem is that the Label shows the right value but the multi binding says {DependencyProperty.UnsetValue} for the ComboBox value.

What I have tried:

The label to show the value but it works and only the multi Binding did not work.

解决方案

I added at the Binding FallbackValue="" and it works

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