WPF RadGridView 默認日期值到空值

Question

如何覆蓋 Telerik radgridview 的默認日期值 (1/1/1900) 以在 xaml 中清空

xaml 綁定就像：

<telerik:GridViewDataColumn  Header="Estimated Start On" DataMemberBinding="{Binding EstdStartDate,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged,StringFormat=N2}"   Width="100"  IsFilterable="False" IsGroupable="False">
    <telerik:GridViewDataColumn.CellTemplate>
             <DataTemplate>
                 <Label Content="{Binding EstdStartDate}" Height="30"    />
             </DataTemplate>
    </telerik:GridViewDataColumn.CellTemplate>
</telerik:GridViewDataColumn>

謝謝，薩拉蒂

Answer 1

看看如何實現WPF 值轉換器。

看法：

<telerik:GridViewDataColumn DataMemberBinding="{Binding DateColumn, Converter={StaticResource MyDateConverter}" IsReadOnly="True">

轉換器：

public class MyDateConverter:IValueConverter  
{  
    public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)  
    {  
        if (value is DateTime)
        {
            DateTime test = (DateTime) value;
            if (test.Year > 1900) // If year is greater than 1900 then display
            {
                string date = test.ToString("d/M/yyyy"); // Your date format
                return date;
            }
        }

        return string.Empty;
    }  

    public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)  
    {  
        throw new NotImplementedException();  
    }  
}  

Answer 2

嘗試轉換默認值。 這里 DateTime.MinValue 是默認值

if (EndDate == DateTime.MinValue)
{
    Response.Write("Null");
}