WPF Binding custom list indexer-CodePudding

I'm trying to make a screen with lots of controls using mvvm It's a settings screen that I want to allow the user to search for the settings he wants, leaving the others invisible.

I wouldn't want to have to create a property for every control, instead I'd like to create a list and index every item from it to a control.

However, for ease of maintenance, I would like to use a custom indexer, in this case a string

I created this list

public class ObservConfigList: ObservableCollection<ConfigModel>
{
    public ConfigModel this[string find]
    {
        get => this.FirstOrDefault(x => x.Config == find);
        set
        {
            var indice = this.IndexOf(this.FirstOrDefault(x => x.Config == find));
            if (indice >= this.Count)
                this[indice] = value;
        }
    }
}

And the xaml was like this

<Grid DataContext="{Binding ListConfig[EMPRESA]}" Style="{StaticResource visibConvert}">
        <Grid.ColumnDefinitions>                
            <ColumnDefinition Style="{StaticResource col1}"/>
            <ColumnDefinition Style="{StaticResource col2}"/>
        </Grid.ColumnDefinitions>
        <TextBlock Text="{Binding Descricao}"/>
        <ComboBox Grid.Column="1" Text="{Binding Valor}">
            <ComboBoxItem Content="SIM"/>
            <ComboBoxItem Content="NÃO"/>
        </ComboBox>
    </Grid>

my viewmodel

  private ObservConfigList _listConfig = new ObservConfigList();
    public ObservConfigList ListConfig { get => _listConfig; set => _listConfig = value; }
    private void ConfigViewModel()
    {
        ConfigEmpresa = new ConfigModel();         

        ConfigEmpresa.Descricao = "Empresa";
        ConfigEmpresa.IsVisible = true;
        ConfigEmpresa.Config = "EMPRESA";
        ListConfig.Add(ConfigEmpresa);
    }

It even worked as I expected at runtime, but I don't know if this is the correct way to do it and in xaml a notification keeps showing that the EMPRESA index is invalid.

CodePudding user response：

I found this question

and modified the code from my list to do so

 public class ObservConfigList
{
    private ObservableCollection<ConfigModel> _listConfig = new ObservableCollection<ConfigModel>();
    public ObservableCollection<ConfigModel> ListConfig { get => _listConfig; set => _listConfig = value; }

    public ConfigModel this[string find]
    {
        get => ListConfig.FirstOrDefault(x => x.Config == find);
        set
        {
            var indice = ListConfig.IndexOf(ListConfig.FirstOrDefault(x => x.Config == find));
            if (indice >= ListConfig.Count)
                ListConfig[indice] = value;
        }
    }
}

This way it no longer displays error notifications.