C#WPF DataGrid转换器

‘{local：DateConverter}’值不是有效的MarkupExtension表达式.无法在名称空间’clr-namespace：Yabba’中解析’DateConverter’. ‘DateConverter’必须是MarkupExtension的子类.

然而,我所有的例子都显示了DateConverter：IValueConverter.

我只是想根据日期更改列以列出我想要的内容.但无法获得任何1个示例/方法.

XAML

<Window Name="MainForm" x:Class="Yabba.MainWindow"
    xmlns:local="clr-namespace:Yabba"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="MainWindow" Height="655.217" Width="887.851" Loaded="Window_Loaded">
<Window.Resources>
    <local:DateConverter x:Key="dateConverter"/>
</Window.Resources>
<Grid>
    <DataGrid Name="dataGrid1"  AutoGenerateColumns="False" PreviewKeyDown="dataGrid1_KeyDown" CanUserAddRows="false" SelectionUnit="FullRow" IsReadOnly="True" SelectionMode="Single" HorizontalAlignment="Left" VerticalAlignment="Top" Height="348" Width="753" SelectionChanged="dataGrid1_SelectionChanged" Margin="0,20,0" MouseDoubleClick="dataGrid1_MouseDoubleClick">
        <DataGrid.Columns>
            <DataGridTextColumn Header="Question" Binding="{Binding title}"></DataGridTextColumn>
            <DataGridTextColumn Header="Period" Binding="{Binding started,Converter={local:DateConverter}}"></DataGridTextColumn>
        </DataGrid.Columns>
    </DataGrid>
</Grid>

码

namespace Yabba {
/// <summary>
[ValueConversion(typeof(DateTime),typeof(String))]
public class DateConverter : IValueConverter {
    public object Convert(object value,Type targetType,object parameter,CultureInfo culture) {
        DateTime date = (DateTime)value;
        return date.ToShortDateString();
    }

    public object ConvertBack(object value,CultureInfo culture) {
        string strValue = value as string;
        DateTime resultDateTime;
        if (DateTime.TryParse(strValue,out resultDateTime)) {
            return resultDateTime;
        }
        return DependencyProperty.UnsetValue;
    }
}

我在这做错了什么？

为使用此示例的任何人添加了注释:(无关联,请查看所选答案的答案)

您可能需要根据需要更改类型.

[ValueConversion(typeof(DateTime),typeof(String))]

我不得不改变我的

[ValueConversion(typeof(String),typeof(String))]

然后重铸到DateTime

DateTime date = DateTime.Parse((string)value);