search is not working in ios xamarin.forms
Question
i have a searchbar in my app. the code for searching is as follows:
private void search_TextChanged(object sender, TextChangedEventArgs e)
{
if (list_total_reg_std.Count != 0)
{
if (string.IsNullOrEmpty(e.NewTextValue))
{
if (filtered == false)
registeredstdslist.ItemsSource = list_total_reg_std;
else
registeredstdslist.ItemsSource = list_filtered_reg_std;
}
else
{
if (filtered == false)
registeredstdslist.ItemsSource = list_total_reg_std.Where(x => x.name.ToLower().Contains(e.NewTextValue) || x.stdid.ToLower().Contains(e.NewTextValue) || x.edlevel.ToString().ToLower().Contains(e.NewTextValue));
else
registeredstdslist.ItemsSource = list_filtered_reg_std.Where(x => x.name.ToLower().Contains(e.NewTextValue) || x.stdid.ToLower().Contains(e.NewTextValue) || x.edlevel.ToString().ToLower().Contains(e.NewTextValue));
}
}
}
this is my xaml:
<?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="ALNahrainAlphaApp.Accounting"
xmlns:images="clr-namespace:ALNahrainAlphaApp;assembly=ALNahrainAlphaApp">
<ContentPage.ToolbarItems >
<ToolbarItem Order="Secondary"
Text="logout"
Priority="2"
Clicked="ToolbarItem_Clicked"
/>
</ContentPage.ToolbarItems>
<ContentPage.Resources>
<Style TargetType="Grid">
<Setter Property="VisualStateManager.VisualStateGroups">
<VisualStateGroupList>
<VisualStateGroup x:Name="CommonStates">
<VisualState x:Name="Normal" />
<VisualState x:Name="Selected">
<VisualState.Setters>
<Setter Property="BackgroundColor"
Value="#f4f0ec" />
</VisualState.Setters>
</VisualState>
</VisualStateGroup>
</VisualStateGroupList>
</Setter>
</Style>
</ContentPage.Resources>
<ContentPage.Content>
<AbsoluteLayout Padding="0" HorizontalOptions="FillAndExpand" VerticalOptions="FillAndExpand">
<StackLayout BackgroundColor="White" AbsoluteLayout.LayoutBounds="0, 0, 1, 1" AbsoluteLayout.LayoutFlags="All">
<StackLayout HorizontalOptions="CenterAndExpand" VerticalOptions="CenterAndExpand" >
<SearchBar HorizontalOptions="FillAndExpand" x:Name="search" TextChanged="search_TextChanged"/>
<RefreshView x:Name="refresh" >
<CollectionView x:Name="registeredstdslist" SelectionChanged="registeredstdslist_SelectionChanged" SelectionMode="Single" >
<CollectionView.Header>
<Grid Padding="2" ColumnSpacing="1" RowSpacing="1">
<Grid.RowDefinitions>
<RowDefinition Height="35"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="0.4*"/>
<ColumnDefinition Width="0.5*"/>
<ColumnDefinition Width="0.5*"/>
<ColumnDefinition Width="0.3*"/>
<ColumnDefinition Width="0.2*"/>
<ColumnDefinition Width="0.3*"/>
</Grid.ColumnDefinitions>
<Label
Grid.Column="0"
Text="StdID"
TextColor="Black"
VerticalOptions="Center"
HorizontalOptions="Center"
LineBreakMode="TailTruncation"
/>
<Label
Grid.Column="1"
Text="Name"
TextColor="Black"
VerticalOptions="Center"
HorizontalOptions="Center"
LineBreakMode="TailTruncation"
/>
<Label
Grid.Column="2"
Text="Reg Date"
TextColor="Black"
VerticalOptions="Center"
HorizontalOptions="Center"
LineBreakMode="TailTruncation"
/>
<Label
Grid.Column="3"
Text="Edlevel"
TextColor="Black"
VerticalOptions="Center"
HorizontalOptions="Center"
LineBreakMode="TailTruncation"
/>
<Label
Grid.Column="4"
Text="Grade"
TextColor="Black"
VerticalOptions="Center"
HorizontalOptions="Center"
LineBreakMode="TailTruncation"
/>
<Label
Grid.Column="5"
Text="Status"
TextColor="Black"
VerticalOptions="Center"
HorizontalOptions="Center"
LineBreakMode="TailTruncation"
/>
</Grid>
</CollectionView.Header>
<CollectionView.ItemTemplate>
<DataTemplate >
<Grid ColumnSpacing="1" RowSpacing="0" Padding="9,0,0,0" >
<Grid.RowDefinitions>
<RowDefinition Height="40"/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="0.4*"/>
<ColumnDefinition Width="0.5*"/>
<ColumnDefinition Width="0.5*"/>
<ColumnDefinition Width="0.3*"/>
<ColumnDefinition Width="0.2*"/>
<ColumnDefinition Width="0.3*"/>
</Grid.ColumnDefinitions>
<Label
Grid.Column="0"
Text="{Binding stdid}"
TextColor="Black"
VerticalOptions="Center"
HorizontalOptions="Center"
LineBreakMode="TailTruncation"
FontSize="13"
/>
<Label
Grid.Column="1"
Text="{Binding name}"
TextColor="Black"
VerticalOptions="Center"
HorizontalOptions="Center"
LineBreakMode="TailTruncation"
FontSize="13"
/>
<Label
Grid.Column="2"
Text="{Binding DateofReg}"
TextColor="Black"
VerticalOptions="Center"
HorizontalOptions="Center"
LineBreakMode="TailTruncation"
FontSize="13"
/>
<Label
Grid.Column="3"
Text="{Binding edlevel}"
TextColor="Black"
VerticalOptions="Center"
HorizontalOptions="Center"
LineBreakMode="TailTruncation"
FontSize="13"
/>
<Label
Grid.Column="4"
Text="{Binding grade}"
TextColor="Black"
VerticalOptions="Center"
HorizontalOptions="Center"
LineBreakMode="TailTruncation"
Padding="10"
FontSize="13"
/>
<Image
Grid.Column="5"
VerticalOptions="Center"
HorizontalOptions="Center"
HeightRequest="20"
WidthRequest="20"
>
<Image.Triggers>
<DataTrigger TargetType="Image" Binding="{Binding status}" Value="false" >
<Setter Property="Source" Value="{OnPlatform Android=redtik.png,iOS=redtik.png}"/>
</DataTrigger>
<DataTrigger TargetType="Image" Binding="{Binding status}" Value="true" >
<Setter Property="Source" Value="{OnPlatform Android=greentik.png, iOS=greentik.png}"/>
</DataTrigger>
</Image.Triggers>
</Image>
</Grid>
</DataTemplate>
</CollectionView.ItemTemplate>
</CollectionView>
</RefreshView>
<StackLayout VerticalOptions="EndAndExpand" HorizontalOptions="FillAndExpand" Orientation="Horizontal" BackgroundColor="#0d98ba">
<StackLayout Style="{StaticResource ButtonNavigationBarStackLayoutStyle}" x:Name="stckAddStd">
<Image Margin="0,10,0,5" x:Name="imgAdd" Style="{StaticResource ButtonNavigationBarImageStyle}" />
</StackLayout>
<StackLayout Style="{StaticResource ButtonNavigationBarStackLayoutStyle}" x:Name="stckfilter">
<Image Margin="0,10,0,10" x:Name="imgfilter" Style="{StaticResource ButtonNavigationBarImageStyle}" />
</StackLayout>
<StackLayout Style="{StaticResource ButtonNavigationBarStackLayoutStyle}" x:Name="stckshare">
<Image Margin="0,10,0,10" x:Name="imgshare" Style="{StaticResource ButtonNavigationBarImageStyle}" />
</StackLayout>
</StackLayout>
</StackLayout>
</StackLayout>
<ContentView x:Name="popupLoadingView" BackgroundColor="Transparent" Padding="10, 0" IsVisible="false" AbsoluteLayout.LayoutBounds="0, 0, 1, 1" AbsoluteLayout.LayoutFlags="All">
<StackLayout VerticalOptions="Center" HorizontalOptions="Center">
<StackLayout Orientation="Vertical" HeightRequest="150" WidthRequest="200" BackgroundColor="Transparent">
<ActivityIndicator x:Name="activityIndicator" Margin="0,50,0,0" VerticalOptions="Center" HorizontalOptions="Center" Color="Black" WidthRequest="40" HeightRequest="40" ></ActivityIndicator>
</StackLayout>
</StackLayout>
</ContentView>
</AbsoluteLayout>
</ContentPage.Content>
</ContentPage>
the registeredstdslist is a collection view that has data about students that i get from a database. the code works well on android but on my ios simulator, it doesn't work. the collectionview shows no data when i write something in the searchbar though what i write has letters like some data in my list. and when i erase what i wrote, all data are displayed again. why is that? what am i doing wrong?
Update: i added this:
private void search_TextChanged(object sender, TextChangedEventArgs e)
{
if (list_total_reg_std.Count != 0)
{
if (string.IsNullOrEmpty(e.NewTextValue))
{
if (filtered == false)
registeredstdslist.ItemsSource = list_total_reg_std;
else
registeredstdslist.ItemsSource = list_filtered_reg_std;
}
else
{
if (filtered == false)
if(list_total_reg_std.FindAll(x => x.name.ToLower().Contains(e.NewTextValue)).Count==0)
DisplayAlert("Operation Failed", "No matchiing data!", "Cancel");
// registeredstdslist.ItemsSource = list_total_reg_std.Where(x => x.name.ToLower().Contains(e.NewTextValue) || x.stdid.ToLower().Contains(e.NewTextValue) || x.edlevel.ToString().ToLower().Contains(e.NewTextValue));
else
registeredstdslist.ItemsSource = list_filtered_reg_std.Where(x => x.name.ToLower().Contains(e.NewTextValue) || x.stdid.ToLower().Contains(e.NewTextValue) || x.edlevel.ToString().ToLower().Contains(e.NewTextValue));
}
}
it actually gave No matching data but why? and why does it work on android with no problems and on ios it doesn't?
1 answers
solution1
1 ACCPTED 2022-06-02 00:04:06
One problem I see is that if you type any upper case, it will not match.
x.name.ToLower().Contains(e.NewTextValue) should be x.name.ToLower().Contains(e.NewTextValue.ToLower()) .
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.
Related Question
Xamarin.Forms labels not working anymore, on iOS
DateTimePicker in Xamarin.Forms iOS
Xamarin.Forms Shell GoToAsync is not working as expected in iOS
Xamarin.Forms SkiaSharp Gradient working on Android but not on iOS
Changing height of custom progresssbar not working Xamarin.Forms iOS
Carousel View in Xamarin.Forms iOS
Stop the IOS bouncing in Xamarin.Forms
Xamarin.Forms Firebase Analytics for iOS
MicroCharts on Xamarin.Forms iOS outside of ViewPort
Xamarin.Forms - iOS RegisteredForRemoteNotifications not getting called
Related Tags