绑定DataGridTextColumn中的ViewModel属性 [英] Binding ViewModel property in DataGridTextColumn

问题描述

对于应用程序，我需要使用 DataGridTextColumn 创建具有 MultiBinding的 DataGrid 。
第一个 Binding 使用ItemsSource中给出的属性，第二个 Binding 应该使用我的属性ViewModel。

For an application I need to create a DataGrid with a DataGridTextColumn which has MultiBinding. The first Binding uses a property given in the ItemsSource, the second Binding should use a Property from my ViewModel.

<DataGridTextColumn Header="Hourly wage" SortMemberPath="HourlyWage">
    <DataGridTextColumn.Binding>
        <MultiBinding StringFormat="{}{0}{1}">
            <Binding Path="HourlyWage" />
            <Binding Path="CurrencyUnit" />
        </MultiBinding>
    </DataGridTextColumn.Binding>
</DataGridTextColumn>

在这种情况下，小时工资是当前项目。 CurrencyUnit 是我的ViewModel中的一个属性。
如果我启动我的应用程序，此列为空。

In that case HourlyWage is a property of the current item. CurrencyUnit is a property in my ViewModel. If I start my application this column is empty. So how do I get it displaying both?

我使用Catel作为我的MVVM框架，并使用MahApps.Metro作为我的GUI。我无法在视图中创建ViewModel，因为它是由Catel处理的。

I'm using Catel as my MVVM Framework and MahApps.Metro for my GUI. I can't create a ViewModel in my View as it is handled by Catel.

问候，
Stefan

Regards, Stefan

推荐答案

如果无法访问视图模型，则可以如下定义第二个绑定：

If you cannot access the view model, you can define the second binding as follows:

<Binding RelativeSource="{RelativeSource AncestorType=DataGrid}"
         Path="DataContext.CurrencyUnit" />

绑定的源将设置为DataGrid实例。假设您的视图模型保存了以下项的路径，则路径 DataContext.CurrencyUnit 将引用属性 YourViewModel.CurrencyUnit 。数据网格和货币单位属性。

The source of the Binding will be set to the DataGrid instance. The path DataContext.CurrencyUnit will refer to the property YourViewModel.CurrencyUnit, assuming that your view model holds the items collection for the data grid and the currency unit property.

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