[英]xamarin forms How to pass enum value to XAML and use it in switch statement?
[英]Xamarin Forms Switch XAML
我是Xamarin的新手,我正在尝试创建一个包含一些组件的简单页面。
这些组件之一是Switch,它本身可以正常工作,但我想将基本文本“ inactive / active”改为“ male / female”
我已经看到在Windows Phone的Xaml中有一个带有On / OffContent属性的ToggleSwitch组件,但是我似乎找不到Xamarin Forms的XAML等效项。
任何想法 ?
谢谢!
有人问了缺少内置的开关选项,或者至少是不能重命名开关选项。
您可以使用自定义渲染,在操作系统级别修改文本,或者像我选择的那样做,只需构建自己的开关即可。
此switch
是水平排列的两个按钮,文本为“ 是”和“ 否” 。 选中的按钮显示红色边框,而未选择的显示透明边框。
class CustomSwitch : Grid
{
public event EventHandler<SelectedItemChangedEventArgs> ItemSelected;
private Button negative;
private Button positive;
public static readonly BindableProperty SelectedItemProperty = BindableProperty.Create<CustomSwitch, Object>(t => t.SelectedItem, null, BindingMode.TwoWay, propertyChanged: OnSelectedItemChanged);
public CustomSwitch()
{
try
{
this.HorizontalOptions = LayoutOptions.Center;
this.VerticalOptions = LayoutOptions.Center;
negative = new Button();
negative.Text = "No";
negative.Style = <YourNameSpace>.AppStyling.Style_Button_Switch;
negative.Clicked += (o,s) => OnSelectedItemChanged(this, ItemSelected, (int)Classes.Collections.Enums.SelectionStatus.False);
positive = new Button();
positive.Text = "Yes";
positive.Style = <YourNameSpace>.AppStyling.Style_Button_Switch;
positive.Clicked += (o, s) => OnSelectedItemChanged(this, ItemSelected, (int)Classes.Collections.Enums.SelectionStatus.True);
this.Children.Add(negative, 0,0);
this.Children.Add(positive, 1,0);
}
catch(System.Exception ex)
{
<YourNameSpace>.Classes.Helpers.Helper_ErrorHandling.SendErrorToServer(ex, this.GetType().Name, System.Reflection.MethodBase.GetCurrentMethod().Name);
}
}
public Object SelectedItem
{
get
{
return base.GetValue(SelectedItemProperty);
}
set
{
if (SelectedItem != value)
{
base.SetValue(SelectedItemProperty, value);
InternalUpdateSelected();
}
}
}
private void InternalUpdateSelected()
{
if((int)SelectedItem == (int)Classes.Collections.Enums.SelectionStatus.False)
{
negative.BorderColor = <YourNameSpace>.AppStyling.Color_Selected;
positive.BorderColor = <YourNameSpace>.AppStyling.Color_UnSelected;
positive.Opacity = <YourNameSpace>.AppStyling.Opaque_High;
}
else if ((int)SelectedItem == (int)Classes.Collections.Enums.SelectionStatus.True)
{
negative.BorderColor = <YourNameSpace>.AppStyling.Color_UnSelected;
negative.Opacity = <YourNameSpace>.AppStyling.Opaque_High;
positive.BorderColor = <YourNameSpace>.AppStyling.Color_Selected;
}
else
{
negative.BorderColor = <YourNameSpace>.AppStyling.Color_UnSelected;
negative.Opacity = <YourNameSpace>.AppStyling.Opaque_High;
positive.BorderColor = <YourNameSpace>.AppStyling.Color_UnSelected;
positive.Opacity = <YourNameSpace>.AppStyling.Opaque_High;
}
}
private static void OnSelectedItemChanged(BindableObject bindable, object oldValue, object newValue)
{
CustomSwitch boundSwitch = (CustomSwitch)bindable;
if((int)newValue != (int)Classes.Collections.Enums.SelectionStatus.Unselected)
{
boundSwitch.SelectedItem = (int)newValue == (int)Classes.Collections.Enums.SelectionStatus.False ? (int)Classes.Collections.Enums.SelectionStatus.False : (int)Classes.Collections.Enums.SelectionStatus.True;
}
if (boundSwitch.ItemSelected != null)
{
boundSwitch.ItemSelected(boundSwitch, new SelectedItemChangedEventArgs(newValue));
}
boundSwitch.InternalUpdateSelected();
}
}
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