使用转换器绑定到静态资源

发布于 2024-10-11 20:23:15 字数 361 浏览 5 评论 0原文

我有一个 DataGrid 和两个 StaticResource。

我想将 DataGrid 的 RowStyle 绑定到两个 StaticResources 之一。

RowStyle="{StaticResource {Binding Status, Converter={StaticResource MyConverter}}}"

MyConverter 返回 StaticResource 的 Key。

但我收到此错误：

尝试读取或写入受保护的内存。这通常表明其他内存已损坏。

原文

I have a DataGrid and two StaticResource.

I want to bind RowStyle of DataGrid to one of two StaticResources.

RowStyle="{StaticResource {Binding Status, Converter={StaticResource MyConverter}}}"

MyConverter returns StaticResource's Key.

But I get this error:

Attempted to read or write protected memory. This is often an indication that other memory is corrupt.

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过潦 2024-10-18 20:23:15

静态资源键不是可以动态分配的值。键的名称需要内联到 Xaml 中。

正确的方法是这样的： -

RowStyle="{Binding Status, Converter={StaticResource MyConverter}}"

针对“MyConverter”键存储的转换器返回一个 Style 对象。请注意，您可以向转换器添加 ResourceDictionary 类型的属性，并将样式放置在该字典中以供转换器查找。

事实上，我已经编写了一个能够实现此功能的转换器

The Static Resource key is not a value that can be assigned Dynamically. The name of the key needs to inline in the Xaml.

The correct approach is this:-

RowStyle="{Binding Status, Converter={StaticResource MyConverter}}"

Where the converter that is stored against the "MyConverter" key returns a Style object. Note you could add a property of type ResourceDictionary to you converter and place you styles in that dictionary for you converter to lookup.

In fact I have already written a converter capable of this here.

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很糊涂小朋友 2024-10-18 20:23:15

// Another version of writing such a converter

public abstract class BaseConverter : MarkupExtension
{
    protected IServiceProvider ServiceProvider { get; set; }

    public override object ProvideValue(IServiceProvider serviceProvider)
    {
        ServiceProvider = serviceProvider;
        return this;
    }    
}


public class StaticResourceConverter : BaseConverter, IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        return new StaticResourceExtension(value).ProvideValue(ServiceProvider);
    }

    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
    {
        //TODO - implement this for a two-way binding
        throw new NotImplementedException(); 
    }
}

// Another version of writing such a converter

public abstract class BaseConverter : MarkupExtension
{
    protected IServiceProvider ServiceProvider { get; set; }

    public override object ProvideValue(IServiceProvider serviceProvider)
    {
        ServiceProvider = serviceProvider;
        return this;
    }    
}


public class StaticResourceConverter : BaseConverter, IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        return new StaticResourceExtension(value).ProvideValue(ServiceProvider);
    }

    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
    {
        //TODO - implement this for a two-way binding
        throw new NotImplementedException(); 
    }
}

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