Deleting Selected Item from a Listbox.

Question

I am trying to deleted selected item from a listbox which gets its data from a textfile but I can not feed my Delete method with the right excution to accomplish the task. I I have highted my code in red

 

 

 

using GalaSoft.MvvmLight;

using GalaSoft.MvvmLight.Command;

using PhoneBook.View;

using System.Collections.Generic;

using System.IO;

using System.Linq;

namespace PhoneBook.ViewModel

{

class MainWindowViewModel : ViewModelBase

{

#region Constructor

public MainWindowViewModel()

{

ReadTextFile();

}

#endregion

#region Properties

public const string MyListPropertyName = "ListBox";

private List<string> _listBox = null;

public List<string> ListBox

{

get

{

return _listBox = _listBox ?? new List<string>();

}

set

{

if (_listBox == value)

{

return;

}

RaisePropertyChanged(MyListPropertyName);

_listBox = value;

RaisePropertyChanged(MyListPropertyName);

}

}

private string _selectedItem = null;

public string SelectedItem

{

get

{

return _selectedItem;

}

set

{

if (_selectedItem != null)

{

return;

}

_selectedItem = value;

RaisePropertyChanged();

}

}

#endregion

#region Method

private void DeleteSelectedItemListBox()

{

string FileName = (@"C: \Users\StanleyM\Desktop\PhoneBook\PhoneBook\bin\Debug\Personal.text");

StreamReader streamReader = new StreamReader(FileName);

string line = "";

int Counter = -1;

while ((line = streamReader.ReadLine()) != null)

{

foreach (var item in line)

{

if (item.ToString() == SelectedItem.ToString())

{

Counter--;

ListBox.Remove(line);

}

}

}

}

public void ReadTextFile()

{

string FileName = (@"C: \Users\StanleyM\Desktop\PhoneBook\PhoneBook\bin\Debug\Personal.text");

StreamReader streamReader = new StreamReader(FileName);

string line = "";

int Counter = 0;

while ((line = streamReader.ReadLine()) != null)

{

Counter++;

ListBox.Add(item: line);

}

}

private void PopUpWindow()

{

AddEditView PopUp = new AddEditView();

PopUp.ShowDialog();

}

The below is my view

 

 

#endregion

#region RelayCommand

private RelayCommand _addCommand = null;

public RelayCommand AddCommand

{

get

{

return _addCommand = _addCommand ?? new RelayCommand(() => PopUpWindow());

}

}

private RelayCommand _deleteCommand = null;

public RelayCommand DeleteCommand

{

get

{

return _deleteCommand = _deleteCommand ?? new RelayCommand(() => DeleteSelectedItemListBox());

}

}

#endregion

}

}

 

 

<Window x:Class="PhoneBook.MainWindow"

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"

xmlns:local="clr-namespace:PhoneBook"

mc:Ignorable="d"

Title="MainWindow" Height="350" Width="525">

<Window.Resources>

<ResourceDictionary>

<ResourceDictionary.MergedDictionaries>

<ResourceDictionary Source="/PhoneBook;component/Resource/Resource.xaml"></ResourceDictionary>

</ResourceDictionary.MergedDictionaries>

</ResourceDictionary>

</Window.Resources>

<Border BorderThickness="5" BorderBrush="AliceBlue" Background="AntiqueWhite">

<Grid>

<Grid.ColumnDefinitions>

<ColumnDefinition Width="*"/>

<ColumnDefinition Width="*"/>

</Grid.ColumnDefinitions>

<Grid.RowDefinitions>

<RowDefinition Height="25" />

<RowDefinition Height="*" />

</Grid.RowDefinitions>

<Label Grid.Row="0" Content="List of Clients" ></Label>

<Border Grid.Row="1" BorderThickness="5" Background="Black">

<ListBox SelectedItem="{Binding SelectedItem}"

ItemsSource="{Binding ListBox, UpdateSourceTrigger=PropertyChanged}"

Grid.Row="1">

</ListBox>

</Border>

<Button Grid.Row="1" Grid.Column="1" Width="75" Height="25" VerticalAlignment="Top" Margin="100 10 0 0" HorizontalAlignment="Left" Content="Add" Command="{Binding AddCommand}"></Button>

<Button Grid.Row="1" Grid.Column="1" Width="75" Height="25" VerticalAlignment="Top" Margin="100 60 0 0" HorizontalAlignment="Left" Content="Delete" Command="{Binding DeleteCommand}"></Button>

</Grid>

</Border>

</Window>