如何从我的选择器中获得价值?Xamarin形成
本文关键字:Xamarin 形成 我的 选择器 | 更新日期: 2023-09-27 18:28:28
我很难从选择器中取出选定的string
。这是我的代码:
XAML:
<Picker x:Name="thePicker" >
<Picker.Items>
<x:String>info1</x:String>
<x:String>info2 </x:String>
</Picker.Items>
</Picker>
代码:
thePicker.SelectedIndex = 1; //here is the problem i suppose, any idea what i should type?
var ourPickedItem = thePicker.Items[thePicker.SelectedIndex];
现在,即使我选择了数字2,我也只能得到值"info1"。它与SelectedIndex
有关,所以它只选择"1",但我不知道如何编写代码使其适用于所选项目。
您应该看看这个:
picker.SelectedIndexChanged += (sender, args) =>
{
if (picker.SelectedIndex == -1)
{
boxView.Color = Color.Default;
}
else
{
string colorName = picker.Items[picker.SelectedIndex];
boxView.Color = nameToColor[colorName];
}
};
否则,在新版Xamarin表单2.3.4中存在
可绑定选取器
您可以设置ItemSource
<Picker ItemsSource="{Binding Countries}" />
并绑定SelectedIndex属性
SelectedIndex="{Binding CountriesSelectedIndex}"
XLabs已经提供了它
<ContentPage x:Class="XLabs.Samples.Pages.Controls.ExtendedPickerPage"
xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
xmlns:controls="clr-namespace:XLabs.Forms.Controls;assembly=XLabs.Forms"
Title="Picker">
<ContentPage.Content>
<StackLayout x:Name="myStackLayout">
<Label Text="Xaml:" />
<controls:ExtendedPicker x:Name="myPicker"
DisplayProperty="FirstName"
ItemsSource="{Binding MyDataList}"
SelectedItem="{Binding TheChosenOne}" />
</StackLayout>
</ContentPage.Content>