I have a custom view with some bindable properties. There is something wrong, so when I try to open the page it won't open. I'm not getting an error or output. Using FreshMVVM to push the page model.
When I remove the BindableProperty BarcodeTypeProperty
, the page opens.
public class BarcodeView : Image
{
public static readonly BindableProperty BarcodeValueProperty = BindableProperty.Create(nameof(BarcodeValue), typeof(string), typeof(BarcodeView));
public string BarcodeValue
{
get => (string)GetValue(BarcodeValueProperty);
set => SetValue(BarcodeValueProperty, value);
}
public static readonly BindableProperty BarcodeTypeProperty = BindableProperty.Create(nameof(BarcodeType), typeof(BarcodeType), typeof(BarcodeView));
public BarcodeType BarcodeType
{
get => (BarcodeType)GetValue(BarcodeTypeProperty);
set => SetValue(BarcodeTypeProperty, value);
}
}
The BarcodeType is an Enum:
public enum BarcodeType
{
DataMatrix,
Pdf417
}
Usage in Xaml:
<view:BarcodeView BarcodeType="{Binding BarcodeType}" BarcodeValue="abcd"/>
尝试给BarcodeTypeProperty
一个默认值,因为enum不能为null。
public static readonly BindableProperty BarcodeTypeProperty = BindableProperty.Create("BarcodeType", typeof(BarcodeType), typeof(BarcodeView), BarcodeView.DataMatrix);
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