1
我已經將依賴屬性MyList添加到wpf文本框中。依賴屬性的類型爲列表<字符串>。爲了使事情更容易XAML我已經定義了一個轉換器，這樣我可以有以下的語法：WPF Visual Studio Designer和Expression Blend不依賴DependencyProperty上的TypeConverter
<Grid>
<controls:MyTextBox x:Name="Hello" MyList="One,Two" Text="Hello" />
</Grid>
在Visual Studio中，我不能在所有編輯財產和Expression Blend中我可以輸入字符串但它會產生下面的XAML代碼：
<controls:MyTextBox x:Name="Hello" Text="Hello" >
<controls:MyTextBox.MyList>
<System_Collections_Generic:List`1 Capacity="2">
<System:String>One</System:String>
<System:String>Two</System:String>
</System_Collections_Generic:List`1>
</controls:MyTextBox.MyList>
</controls:MyTextBox>
任何想法如何我可以在這兩個Visual Studio中編輯此屬性爲一個字符串，混合？
public class MyTextBox : TextBox
{
[TypeConverter(typeof(MyConverter))]
public List<string> MyList
{
get { return (List<string>)GetValue(MyListProperty); }
set { SetValue(MyListProperty, value); }
}
public static readonly DependencyProperty MyListProperty = DependencyProperty.Register("MyList", typeof(List<string>), typeof(MyTextBox), new FrameworkPropertyMetadata(new List<string> { "one" }));
}
public class MyConverter : TypeConverter
{
public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType)
{
if(sourceType == typeof(string))
return true;
return base.CanConvertFrom(context, sourceType);
}
public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)
{
if(value is string)
return new List<string>(((string)value).Split(','));
return base.ConvertFrom(context, culture, value);
}
public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType)
{
if(destinationType == typeof(string))
return true;
return base.CanConvertTo(context, destinationType);
}
public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType)
{
if(destinationType == typeof(string))
{
var ret = string.Empty;
var s = ret;
((List<string>)value).ForEach(v => s += s + v + ",");
ret = ret.Substring(0, ret.Length - 1);
return ret;
}
return base.ConvertTo(context, culture, value, destinationType);
}
}