display alert, display action sheet

XamarinStudy/XamarinStudy/XamarinStudy/App.xaml.cs

@@ -47,7 +47,9 @@ namespace XamarinStudy
 
 			//MainPage = new SampleAbsoluteLayoutPage();
 
-			MainPage = new SampleRelativeLayoutPage();
+			//MainPage = new SampleRelativeLayoutPage();
+
+			MainPage = new SampleDisplayAlertActionSheetPage();
 		}
 
 		protected override void OnStart()

XamarinStudy/XamarinStudy/XamarinStudy/Views/SampleDisplayAlertActionSheetPage.xaml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
+             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+             x:Class="XamarinStudy.Views.SampleDisplayAlertActionSheetPage">
+    <ContentPage.Content>
+        <StackLayout>
+            <Button x:Name="button1" Text="Alert" Clicked="button1_Clicked"/>
+            <Button x:Name="button2" Text="ChangeText" Clicked="button2_Clicked"/>
+            <Label x:Name="label1" Text="Welcome to Xamarin.Forms!"
+               VerticalOptions="CenterAndExpand"
+               HorizontalOptions="CenterAndExpand"/>
+            <Button x:Name="button3" Text="Font Style ActionSheet" Clicked="button3_Clicked"/>
+            <Button x:Name="button4" Text="Font Size ActionSheet" Clicked="button4_Clicked"/>
+        </StackLayout>
+    </ContentPage.Content>
+</ContentPage>

XamarinStudy/XamarinStudy/XamarinStudy/Views/SampleDisplayAlertActionSheetPage.xaml.cs

@@ -0,0 +1,62 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+using Xamarin.Forms;
+using Xamarin.Forms.Xaml;
+
+namespace XamarinStudy.Views
+{
+	[XamlCompilation(XamlCompilationOptions.Compile)]
+	public partial class SampleDisplayAlertActionSheetPage : ContentPage
+	{
+		public SampleDisplayAlertActionSheetPage()
+		{
+			InitializeComponent();
+		}
+
+		private void button1_Clicked(object sender, EventArgs e)
+		{
+			DisplayAlert("Title", "This is alert.", "OK");
+		}
+
+		private async void button2_Clicked(object sender, EventArgs e)
+		{
+			var result = await DisplayAlert("Question", "Select result.", "YES", "NO");
+			if (result)
+				label1.Text = "YES";
+			else
+				label1.Text = "NO";
+		}
+
+		private async void button3_Clicked(object sender, EventArgs e)
+		{
+			var result = await DisplayActionSheet("Change font style.", "Cancel", null, "Bold", "Italic", "None");
+			switch (result)
+			{
+				case "Bold":
+					label1.FontAttributes = FontAttributes.Bold;
+					break;
+				case "Italic":
+					label1.FontAttributes = FontAttributes.Italic;
+					break;
+				case "None":
+					label1.FontAttributes = FontAttributes.None;
+					break;
+				default:
+					break;
+			}
+		}
+
+		private async void button4_Clicked(object sender, EventArgs e)
+		{
+			var result = await DisplayActionSheet("Change font style.", "Cancel", null, "10", "20", "30", "40", "50");
+			if (result == null)
+				return;
+
+			label1.FontSize = double.Parse(result);
+		}
+	}
+}

XamarinStudy/XamarinStudy/XamarinStudy/XamarinStudy.csproj

@@ -23,6 +23,9 @@
     <EmbeddedResource Update="Views\SampleContentPage.xaml">
       <Generator>MSBuild:UpdateDesignTimeXaml</Generator>
     </EmbeddedResource>
+    <EmbeddedResource Update="Views\SampleDisplayAlertActionSheetPage.xaml">
+      <Generator>MSBuild:UpdateDesignTimeXaml</Generator>
+    </EmbeddedResource>
     <EmbeddedResource Update="Views\SampleElementPage1.xaml">
       <Generator>MSBuild:UpdateDesignTimeXaml</Generator>
     </EmbeddedResource>