如何具体值传递给转换器参数α [英] How to pass specific value to the converter parameter?

问题描述

我创建了一个类的人，看起来是这样的：

I have created a class Person that looks like this:

public class Person
{
    public enum GenderType
    {
        Female, 
        Male
    }

    public string Name
    {
        get; set;
    }

    public GenderType? Gender
    {
        get; set;
    }
}

接下来，我创建了将要Person类型$ P ​​$ psent对象的数据模板。
下面是XAML code：

Next, I created data template that is going to present objects of type Person.
Here's XAML code:

<DataTemplate 
    x:Key="personTemplate" 
    DataType="{x:Type model:Person}">
  <StackPanel>
    <RadioButton 
        Content="Female" 
        IsChecked="{Binding Path=Gender, 
                    Converter={StaticResource genderConverter}, 
                    ConverterParameter=???}"/>
    <RadioButton 
        Content="Male" 
        IsChecked="{Binding Path=Gender, 
                    Converter={StaticResource genderConverter}, 
                    ConverterParameter=???}"/>
    <RadioButton 
        Content="Not specified" 
        IsChecked="{Binding Path=Gender, 
                    Converter={StaticResource genderConverter}, 
                    ConverterParameter=???}"/>
  </StackPanel>
</DataTemplate>

当然， ??? S在了code都不行:)问题是，我想创建一个中 genderConverter 转换器，它在给定值，即比较 personObject.Gender ，对给定的 Person.GenderType 中的参数提供的值，并返回真如果值匹配。

Of course the ???s in the code won't work :) The problem is that I want to create a genderConverter converter which will compare the given value, i.e. personObject.Gender, against the given Person.GenderType value provided in the parameter and return true if the values match.

我不知道如何使变频器参数通 Person.GenderType.Female ， Person.GenderType.Male 和空，为第一，第二和第三个单选按钮，分别为。

I don't know how to make the converter parameter pass Person.GenderType.Female, Person.GenderType.Male and null, for the first, second and third radio button, respectively.

推荐答案

尝试使用 X：静态标记扩展：

<RadioButton 
        Content="Female" 
        IsChecked="{Binding Path=Gender, 
                    Converter={StaticResource genderConverter}, 
                    ConverterParameter={x:Static model:GenderType.Female}}"/>

或者，你可以只通过一个字符串，并使用 Enum.Parse 来的字符串转换为转换器中的枚举类型：

OR, you could just pass a string and use Enum.Parse to convert that string to the enum type in the converter:

<RadioButton 
        Content="Female" 
        IsChecked="{Binding Path=Gender, 
                    Converter={StaticResource genderConverter}, 
                    ConverterParameter=Female}"/>

-

GenderType gender = (GenderType)Enum.Parse(typeof(GenderType), parameter.ToString());

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