WPF datagrid：禁用某些行中的编辑 [英] WPF datagrid: disable editing in certain rows

问题描述

我有一个像订单表绑定到一个 DataGrid 的东西。
我想禁止在行上编辑，订单日期到期（截止日期>当前日期）：显示为灰色，禁止进入编辑模式。

这是我有的：

 < Style TargetType ={x：Type WPFToolkit：DataGridRow}> 
< Style.Triggers> 
< MultiTrigger> 
< MultiTrigger.Conditions> 
<！ - ？ order_date> current_date  - > 
<！ - 一些其他条件 - 已经工作 - > 
< /MultiTrigger.Conditions> 
< Setter Property =IsEnabledValue =False/> 
< Setter Property =ForegroundValue =LightGray/> 
< / MultiTrigger> 
< /Style.Triggers> 
< / Style> 
  

订单日期是一个定义如下的模板列：

 < WPFToolkit：DataGridTemplateColumn SortMemberPath =order_dateHeader =截止日期> 
< WPFToolkit：DataGridTemplateColumn.CellTemplate> 
< DataTemplate> 
< TextBlock Text ={Binding Path = order_date，
 ConverterCulture ='ru-RU'，StringFormat ='{} {0：d}'}/> 
< / DataTemplate> 
< / WPFToolkit：DataGridTemplateColumn.CellTemplate> 
< WPFToolkit：DataGridTemplateColumn.CellEditingTemplate> 
< DataTemplate> 
< WPFToolkit：DatePicker SelectedDate ={Binding Path = order_date}/> 
< / DataTemplate> 
< / WPFToolkit：DataGridTemplateColumn.CellEditingTemplate> 
< / WPFToolkit：DataGridTemplateColumn> 
  

有没有办法在订单日期到期的行中禁用编辑模式？

解决方案

所以似乎一切正常，但你需要一种方法来检查（order_date> current_date）在一个触发器？如果是这样的话，你可以编写一个ValueConverter，就像DateExpiredConverter一样，并检查那里的条件并返回一个布尔值。

转换器类可能看起来像这样： p>

  public class DateExpiredConverter：IValueConverter 
 {
 public object Convert（object value，Type targetType，object parameter，CultureInfo文化）
 {
 DateTime order_date =（DateTime）value; 
 
 if（order_date> System.DateTime.Now）
 {
 return true; 
} 
 else 
 {
 return false; 
} 
} 
 
 public object ConvertBack（object value，Type targetType，object parameter，CultureInfo culture）
 {
 throw new Exception（The method或操作未实现。）; 
} 
} 
  

然后在你的触发器中你做这样的事情： / p>

 < Style TargetType ={x：Type WPFToolkit：DataGridRow}> 
< Style.Triggers> 
< DataTrigger Binding ={Binding Path = order_date，Converter = {StaticResource DateExpiredConverter}}Value =True> 
< Setter Property =IsEnabledValue =False/> 
< Setter Property =ForegroundValue =LightGray/> 
< / DataTrigger> 
< /Style.Triggers> 
< / Style> 
  

我没有测试过这个代码，但应该与你所需要的非常接近。 >

I have something like orders table bound to a DataGrid. I want to disable editing on rows, where order date is expired (deadline date > current date): show them greyed and ban entering into edit mode.

Here is what I have:

<Style TargetType="{x:Type WPFToolkit:DataGridRow}">
    <Style.Triggers>
        <MultiTrigger>
            <MultiTrigger.Conditions>
                <!-- ??? order_date > current_date -->
                <!-- some other condition - already works -->
            </MultiTrigger.Conditions>
            <Setter Property="IsEnabled" Value="False"/>
            <Setter Property="Foreground" Value="LightGray"/>
        </MultiTrigger>
    </Style.Triggers>
</Style>

The order date is a template column defined as follows:

<WPFToolkit:DataGridTemplateColumn SortMemberPath="order_date" Header="Deadline" >
    <WPFToolkit:DataGridTemplateColumn.CellTemplate>
        <DataTemplate>
            <TextBlock Text="{Binding Path=order_date,  
                ConverterCulture='ru-RU', StringFormat='{}{0:d}'}" />
        </DataTemplate>
    </WPFToolkit:DataGridTemplateColumn.CellTemplate>
    <WPFToolkit:DataGridTemplateColumn.CellEditingTemplate>
        <DataTemplate>
            <WPFToolkit:DatePicker SelectedDate="{Binding Path=order_date}" />
        </DataTemplate>
    </WPFToolkit:DataGridTemplateColumn.CellEditingTemplate>
</WPFToolkit:DataGridTemplateColumn>

Is there a way to disable editing mode in rows where order date has expired?

解决方案

So it seems that everything works but you need a way to check (order_date > current_date) in a Trigger? If that is the case, you could write a ValueConverter like perhaps DateExpiredConverter and check the condition there and return a boolean.

The converter class might look something like this:

public class DateExpiredConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        DateTime order_date = (DateTime)value;

        if (order_date > System.DateTime.Now)
        {
            return true;
        }
        else
        {
            return false;
        }
    }

    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
    {
        throw new Exception("The method or operation is not implemented.");
    }
}

Then in your trigger you do something like this:

<Style TargetType="{x:Type WPFToolkit:DataGridRow}">
    <Style.Triggers>
        <DataTrigger Binding="{Binding Path=order_date, Converter={StaticResource DateExpiredConverter}}" Value="True">
                <Setter Property="IsEnabled" Value="False"/>
                <Setter Property="Foreground" Value="LightGray"/>
        </DataTrigger>
    </Style.Triggers>
</Style>

I haven't tested this code but it should be pretty close to what you need.

这篇关于WPF datagrid：禁用某些行中的编辑的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！