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我創建了一個大的UserControl
,並且爲了測試目的,我設置了BindingContext = this
。現在我需要一個BindableProperty
,所以我不能再使用這個技巧了,所以我怎麼能設置它來反映它自己?
問題是,我在XAML中使用UserControl,然後它說,SelectedDate綁定的元素不存在,當我設置BindingContext = this
。UserControl綁定到自己
的UserControl
是如此的複雜,唯一的事情,我可以在XAML定義是主要的像
<?xml version="1.0" encoding="UTF-8"?>
<Grid xmlns="http://xamarin.com/schemas/2014/forms" xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml" x:Class="ComplexUserControl" />
我不找到合適的方式去
我創建了一個簡單的UserControl,所以你可以看到,我正在嘗試做什麼
class Test : Grid
{
public static readonly BindableProperty SelectedDateProperty = BindableProperty.Create("SelectedDate", typeof(DateTime), typeof(Test), defaultValue: DateTime.Now, defaultBindingMode: BindingMode.TwoWay);
public DateTime Date1
{
get { return DateTime.Today.AddDays(-1); }
}
public DateTime Date2
{
get { return DateTime.Today; }
}
public DateTime Date3
{
get { return DateTime.Today.AddDays(1); }
}
public Test()
{
InitializeComponent();
}
private void InitializeComponent()
{
ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(1, GridUnitType.Star) });
ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(1, GridUnitType.Star) });
ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(1, GridUnitType.Star) });
Button btn1 = new Button();
btn1.SetBinding(Button.FontSizeProperty, new Binding("SelectedDate", converter: new IsSelectedFontSizeConverter(), converterParameter: Date1));
btn1.SetBinding(Button.TextProperty, new Binding("Date1", stringFormat: "dd"));
Children.Add(btn1, 0, 0);
Button btn2 = new Button();
btn2.SetBinding(Button.FontSizeProperty, new Binding("SelectedDate", converter: new IsSelectedFontSizeConverter(), converterParameter: Date2));
btn2.SetBinding(Button.TextProperty, new Binding("Date2", stringFormat: "dd"));
Children.Add(btn2, 1, 0);
Button btn3 = new Button();
btn3.SetBinding(Button.FontSizeProperty, new Binding("SelectedDate", converter: new IsSelectedFontSizeConverter(), converterParameter: Date3));
btn3.SetBinding(Button.TextProperty, new Binding("Date3", stringFormat: "dd"));
Children.Add(btn3, 2, 0);
}
}
從外部應該可以將SelectedDate設置爲另一個日期。
如何在c#代碼中設置'testcontrol'?因爲我無法在XAML中創建UserControl(在UserControl中進行的計算太多,無法在XAML中執行)? –
您必須設置控件的x:name =「testControl」。 創建test.xaml頁面。
正如我所看到的,你只能在xaml –