我有2个控件:
DatePicker:仅适用于日期
带有TimeMask的TextBox:仅限时间
它们都链接到同一个属性DateTime EffectiveDate
但问题是当我更改DatePicker上的Date时,它会将TimeTextBox中的Time更改回12:00。
我理解它的原因,但是最好的解决方案是让它们分开工作但是绑定到相同的属性?
我试图占用当前时间并在set属性中构建一个新的Date但总是出现溢出错误。
答案 0 :(得分:3)
你可以这样做:
private DateTime _effectiveDate;
...
public DateTime DateOfEffectiveDate
{
get { return _effectiveDate; }
set
{
_effectiveDate = new DateTime(value.Year, value.Month, value.Day, _effectiveDate.Hour, _effectiveDate.Minute, _effectiveDate.Second);
}
}
public DateTime TimeOfEffectiveDate
{
get { return _effectiveDate; }
set
{
_effectiveDate = new DateTime(_effectiveDate.Year, _effectiveDate.Month, _effectiveDate.Day, value.Hour, value.Minute, value.Second);
}
}
答案 1 :(得分:3)
您可以使用值转换器来保持值
public class DateConverter : IValueConverter
{
private DateTime timePickerDate;
public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
timePickerDate = ((DateTime)(value));
return value;
}
public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
if (value == null) return timePickerDate;
var datePickerDate = ((DateTime)(value));
// compare relevant parts manually
if (datePickerDate.Hour != timePickerDate.Hour
|| datePickerDate.Minute != timePickerDate.Minute
|| datePickerDate.Second != timePickerDate.Second)
{
// correct the date picker value
var result = new DateTime(datePickerDate.Year,
datePickerDate.Month,
datePickerDate.Day,
timePickerDate.Hour,
timePickerDate.Minute,
timePickerDate.Second);
// return, because this event handler will be executed a second time
return result;
}
return datePickerDate;
}
}
让两个有问题的控件绑定到一个属性,但让日期选择器使用转换器来覆盖时间。
<Grid Margin="10,5" >
<Grid.ColumnDefinitions>
<ColumnDefinition/>
<ColumnDefinition Width="auto"/>
</Grid.ColumnDefinitions>
<sdk:DatePicker Grid.Column="0" TabIndex="1" Padding="0" SelectedDate="{Binding EffectiveDate, Mode=TwoWay, Converter={StaticResource DateConverter}}" SelectedDateFormat="Short"/>
<toolkit:TimePicker Grid.Column="1" Value="{Binding EffectiveDate, Mode=TwoWay}" Margin="0" Padding="0" HorizontalAlignment="Left" TabIndex="2" />
</Grid>
答案 2 :(得分:1)
内置的DatePicker控件只选择没有任何特定时间的日期,所以我担心尝试在TextBox中显示所选日期的时间是没有意义的。每次选择新日期时,DatePicker将有效清除时间部分。这就是控制的工作原理。
因此,您应该将DatePicker和TextBox分别绑定到两个不同的源属性,分别为DateTime?
和TimeSpan
。
另一种选择是使用另一个选择日期和时间的控件,例如:http://wpftoolkit.codeplex.com/wikipage?title=DateTimePicker
答案 3 :(得分:0)
抓住dateTimePicker1_ValueChanged
事件,然后设置binded field value
合并date
和time
部分
private void dateTimePicker1_ValueChanged(object sender, EventArgs e)
{
DateTime dt = dateTimePicker1.Value;
int hour = Convert.ToInt32(textBox1.Text.Split(':')[0]);
int minute = Convert.ToInt32(textBox1.Text.Split(':')[1]);
bindedfield = new DateTime(dt.Year, dt.Month, dt.Day, hour, minute, 0);
}