Timepicker Updatesourcetrigger = propertychanged不更改值 [英] Timepicker Updatesourcetrigger=propertychanged doesn't change value

问题描述

我正在Windows窗体中托管一个WPF用户控件
在wpf用户控件中，我正在使用wpfToolkit.extended中的timepicker

如果我使用up或downkeys或者只是在textfield中输入一个时间源不被更新allthough我正在使用Updatesourcetrigger = propertychanged。

当我在dropdrownlist中选择一个时间一切正常应该的方式
这是工具包的命名空间。

  xmlns：xctk =clr-namespace：Xceed.Wpf.Toolkit ; assembly = WPFToolkit.Extended
  

这是timepicker的xaml

$ b $时间间隔格式=LongTimeTimeInterval =00：15：00.000Value ={Binding Path = StartTime，UpdateSourceTrigger = PropertyChanged}b

 < xctk： >< / xctk：TimePicker> 
  

如果我在WPFusercontrol外面单击，而不是将焦点改为wpf usercontrol中的另一个控件。绑定的时间没有更新。

任何想法如何解决这个问题？

解决方案

找到解决这个问题的解决方案：
我给了TimePicker一个名字（在这种情况下是'tpFrom'），那么我在TimePicker上使用了TextBoxBase.TextChanged事件。
这是Xaml现在的样子：

 < xctk：TimePicker Name =tpFromFormat = LongTimeTextBoxBase.TextChanged =TimePicker_TextChangedTimeInterval =00：15：00.000Value ={Binding Path = StartTime，UpdateSourceTrigger = PropertyChanged}>< / xctk：TimePicker> 
  

在我们的eventhandler中的代码中，我们将重点放在我们的timepicker上。

  private void TimePicker_TextChanged（object sender，TextChangedEventArgs e）
 {
 tpFrom.Focus（）; 
} 
  

现在，每当文字发生变化时，值也会发生变化，问题解决： - ）

I'm hosting a WPF usercontrol in a windows form In the wpf user control I am using a timepicker from wpfToolkit.extended

If I use the up or downkeys or just enter a time in the textfield the source is not updated allthough I am using Updatesourcetrigger = propertychanged.

When I select a time in the dropdrownlist everything works the way it should. This is the namespace of the toolkit.

xmlns:xctk="clr-namespace:Xceed.Wpf.Toolkit;assembly=WPFToolkit.Extended"

This is the xaml for the timepicker

  <xctk:TimePicker  Format="LongTime" TimeInterval="00:15:00.000" Value="{Binding Path=StartTime, UpdateSourceTrigger=PropertyChanged}" ></xctk:TimePicker>

If I click outside the WPFusercontrol without changing the focus to another control in the wpf usercontrol first. The Binded time is not updated.

Any idea how I can fix this?

解决方案

Found a solution for this problem: I've given the TimePicker a name (In this case 'tpFrom') then I've used the TextBoxBase.TextChanged event on the TimePicker. This is what the Xaml looks like now:

<xctk:TimePicker Name="tpFrom"  Format="LongTime"  TextBoxBase.TextChanged="TimePicker_TextChanged"  TimeInterval="00:15:00.000" Value="{Binding Path=StartTime, UpdateSourceTrigger=PropertyChanged}"></xctk:TimePicker>

In the code behind in our eventhandler we'll put the focus on our timepicker.

  private void TimePicker_TextChanged(object sender, TextChangedEventArgs e)
    {
        tpFrom.Focus();            
    }

Now everytime the text changes, the value changes as well and the problem is solved :-)

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