CODEWITHSUNDEEP
c#wpfcheckboxcheckboxlist
ale
ale

Reputation: 3431

Clear values of a CheckBoxList?

I have one listBox with check box, when an event end, I need uncheck each check box.

This is my xaml, but in code how can I clear this values? Thanks

<ListBox Name="_employeeListBox" ItemsSource="{Binding employeeList}" Margin="409,27,41,301">
    <ListBox.ItemTemplate>
        <DataTemplate>
            <Grid>
                <Grid.ColumnDefinitions>
                    <ColumnDefinition />
                    <ColumnDefinition />
                    <ColumnDefinition />
                    <ColumnDefinition />
                    <ColumnDefinition />
                </Grid.ColumnDefinitions>
                <CheckBox Grid.Column="0" Name="CheckBoxZone" Content="{Binding OperatorNum}" Tag="{Binding TheValue}" Checked="CheckBoxZone_Checked"/>
                <TextBlock Grid.Column="1"></TextBlock>
                <TextBlock Grid.Column="2" Text="{Binding Name}"></TextBlock>
                <TextBlock Grid.Column="3"></TextBlock>
                <TextBlock Grid.Column="4" Text="{Binding LastName}"></TextBlock>
            </Grid>
        </DataTemplate>
    </ListBox.ItemTemplate>
</ListBox>

  private void _searchProjectsbyEmployeebutton_Click_1(object sender, RoutedEventArgs e)
    {
        List<EmployeebyProject> employeebyProjectList = new List<EmployeebyProject>();
        if (EmployeeCollectionToInsert.Count != 0)
        {
            foreach (var employee in EmployeeCollectionToInsert)
            {
                foreach(var employeebyProject in employee.EmployeebyProject)
                {
                    employeebyProjectList.Add(employeebyProject);
                }
            }
            LoadEmployeebyProject(employeebyProjectList);  
            //HERE I NEED UNCHECKED the ListBoxChecked.             
        }
        else { MessageBox.Show("Please select an employee to search his project."); }
    }

Upvotes: 4

Views: 855

Answers (2)

Fredrik Hedblad
Fredrik Hedblad

Reputation: 84657

You are binding ItemsSource in the ListBox and the ListBox is using VirtualizingStackPanel as its ItemsPanel so all ListBoxItem containers may or may not be generated at any given time.
So even if you search the Visual Tree etc. to get all the CheckBoxes to uncheck, you can't be sure that you've unchecked them all.

I suggest you bind IsChecked to a new property in the same class as you've defined OperatorNum (which, by the looks of your question, probably is Employee or similar). This way, all you need to do to uncheck the CheckBoxes is to set IsChecked to False in your source class.
Also make sure you implement INotifyPropertyChanged

Example Xaml

<CheckBox Grid.Column="0"
          Name="CheckBoxZone"
          Content="{Binding OperatorNum}"
          Tag="{Binding TheValue}"
          IsChecked="{Binding IsChecked}"/>

Employee

public class Employee : INotifyPropertyChanged
{
    private bool m_isChecked;
    public bool IsChecked
    {
        get { return m_isChecked; }
        set
        {
            m_isChecked = value;
            OnPropertyChanged("IsChecked");
        }
    }
    // Etc..

    public event PropertyChangedEventHandler PropertyChanged;
    private void OnPropertyChanged(string propertyName)
    {
        if (PropertyChanged != null)
        {
            PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
        }
    }
}

Upvotes: 2

Haris Hasan
Haris Hasan

Reputation: 30097

This post explains how you can get the items of a Template based ListBox. You can use similar technique to find the CheckBox and once you have have got the CheckBox, checking or unchecking is simple

Upvotes: 1

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