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LevelToVisibilityConverter in Silverlight 4

<UserControl x:Class="SLGridImage.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d"
    d:DesignHeight="300" d:DesignWidth="400" xmlns:sdk="http://schemas.microsoft.com/winfx/2006/xaml/presentation/sdk">

    <UserControl.Resources>
        <local:LevelToVisibilityConverter x:Key="LevelToVisibility" />
    </UserControl.Resources>


    <Grid x:Name="LayoutRoot" Background="White">
        <sdk:DataGrid x:Name="dgMarks"  CanUserResizeColumns="False"  SelectionMode="Single" 
               AutoGenerateColumns="False" 
                      VerticalAlignment="Top" 
                      ItemsSource="{Binding MarkCollection}"
                      IsReadOnly="True"  
                      Margin="13,44,0,0" 
                      RowDetailsVisibilityMode="Collapsed" Height="391" 
                      HorizontalAlignment="Left" Width="965" 
                      VerticalScrollBarVisibility="Visible" >
            <sdk:DataGrid.Columns>
                <sdk:DataGridTemplateColumn>
                    <sdk:DataGridTemplateColumn.CellTemplate>
                        <DataTemplate>
                            <Button x:Name="myButton"   
                            Click="myButton_Click">
                                <StackPanel Orientation="Horizontal">
                                    <Image Margin="2, 2, 2, 2"  x:Name="imgMarks"  Stretch="Fill" Width="12" Height="12" 
                                           Source="Images/test.png"
                                           VerticalAlignment="Center"
                                           HorizontalAlignment="Center"
                                        Visibility="{Binding Level, Converter={StaticResource LevelToVisibility}}"
                                     />
                                    <TextBlock Text="{Binding Level}" TextWrapping="NoWrap"  ></TextBlock>

                                </StackPanel>
                            </Button>
                        </DataTemplate>
                    </sdk:DataGridTemplateColumn.CellTemplate>
                </sdk:DataGridTemplateColumn>
                <sdk:DataGridTemplateColumn  Header="Name" >
                    <sdk:DataGridTemplateColumn.CellTemplate>
                        <DataTemplate >
                            <Border>
                                <TextBlock Text="{Binding Name}" />
                            </Border>
                        </DataTemplate>
                    </sdk:DataGridTemplateColumn.CellTemplate>
                </sdk:DataGridTemplateColumn>

                <sdk:DataGridTemplateColumn  Header="Marks" Width="80">
                    <sdk:DataGridTemplateColumn.CellTemplate>
                        <DataTemplate>
                            <Border>
                                <TextBlock Text="{Binding Marks}" />
                            </Border>
                        </DataTemplate>
                    </sdk:DataGridTemplateColumn.CellTemplate>
                </sdk:DataGridTemplateColumn>
            </sdk:DataGrid.Columns>
        </sdk:DataGrid>
    </Grid>
</UserControl>

in .cs:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using System.Collections.ObjectModel;
using System.ComponentModel;

namespace SLGridImage
{
    public partial class MainPage : UserControl
    {
        private MarksViewModel model = new MarksViewModel();
        public MainPage()
        {
            InitializeComponent();
            this.DataContext = model;
        }

        private void myButton_Click(object sender, RoutedEventArgs e)
        {

        }
    }

    public class MarksViewModel : INotifyPropertyChanged
    {

        public MarksViewModel()
        {
            markCollection.Add(new Mark() { Name = "ABC", Marks = 23, Level = 0 });
            markCollection.Add(new Mark() { Name = "XYZ", Marks = 67, Level = 1 });
            markCollection.Add(new Mark() { Name = "YU", Marks = 56, Level = 0 });
            markCollection.Add(new Mark() { Name = "AAA", Marks = 89, Level = 1 });
        }


        private ObservableCollection<Mark> markCollection = new ObservableCollection<Mark>();
        public ObservableCollection<Mark> MarkCollection
        {
            get { return this.markCollection; }
            set
            {
                this.markCollection = value;
                OnPropertyChanged("MarkCollection");
            }
        }

        public event PropertyChangedEventHandler PropertyChanged;

        public void OnPropertyChanged(string propName)
        {
            if (PropertyChanged != null)
                this.PropertyChanged(this, new PropertyChangedEventArgs(propName));
        }
    }

    public class Mark
    {
        public string Name { get; set; }
        public int Marks { get; set; }
        public int Level { get; set; }
    }

    public class LevelToVisibilityConverter : System.Windows.Data.IValueConverter
    {
        #region IValueConverter Members

        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            Visibility isVisible = Visibility.Collapsed;
            if ((value == null))
                return isVisible;
            int condition = (int)value;
            isVisible = condition == 1 ? Visibility.Visible : Visibility.Collapsed;
            return isVisible;
        }

        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            throw new NotImplementedException();
        }

        #endregion
    }
}

when i start getting error on this line

<UserControl.Resources>
        <local:LevelToVisibilityConverter x:Key="LevelToVisibility" />
    </UserControl.Resources>

Type "local: LevelToVisibilityConverter" not found. Ensure that you do not have a reference to the assembly and that all reference assemblies have been built.

What am I missing here? We are waiting for a solution, thanks.

+3
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2 answers

You need to specify the namespace Xml namespace where your LevelToVisibilityConverter is located in your assembly.

Assuming your LevelToVisibilityConverter is in the SLGridImage namespace, you need to add an XML namespace (xmlns: local = "clr-namespace: SLGridImage") as follows

<UserControl x:Class="SLGridImage.MainPage"
  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:local="clr-namespace:SLGridImage"
  <!-- Rest of the declaration -->
>
</UserControl>
+1
source

:

xmlns:local="clr-namespace:SLGridImage"

XAML. intellisense , :) , , / local.

+1

Source: https://habr.com/ru/post/1746128/

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