[英]How Can I Check/UnCheck All Checkboxes in Listbox in C# WPF?
I have a ListBox
contains checkboxes in DataTemplate
and I have two buttons "Select All" and "UnSelect All".I want to make that checkboxes to check all and uncheck all with clicking select and unselect buttons and I want to implement INotifyPropertyChanged
to class. 我有一个
ListBox
其中包含DataTemplate
中的复选框,并且有两个按钮“全选”和“全部取消选择”。我想使该复选框通过单击选择和取消选择按钮来全部选中和全部取消选中,并且我想实现INotifyPropertyChanged
类。 How Can I do that things? 我该怎么做?
Thanks for your answers in advance.. 感谢您的提前答复。
XAML CODE XAML代码
<StackPanel>
<ListBox Name="lstUserDefination"
ScrollViewer.VerticalScrollBarVisibility="Auto" SelectionMode="Multiple">
<ListBox.ItemTemplate>
<DataTemplate>
<ListBoxItem>
<CheckBox Name="chkUser" Content="{Binding AuthorityName}"/>
</ListBoxItem>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
</StackPanel>
C# CODE C#代码
public partial class UserDefinationEdit : Window
{
public ObservableCollection<Authority> authorityList { get; set; }
public UserDefinationEdit()
{
InitializeComponent();
CreateCheckBoxList();
lstUserDefination.ItemsSource = authorityList;
}
private void Window_MouseDown(object sender, MouseButtonEventArgs e)
{
if (e.LeftButton == MouseButtonState.Pressed)
{
DragMove();
}
}
public void CreateCheckBoxList()
{
authorityList = new ObservableCollection<Authority>();
authorityList.Add(new Authority() {AuthorityValue = 0, AuthorityName = "0 - " });
authorityList.Add(new Authority() { AuthorityValue = 1, AuthorityName = "1 - " });
authorityList.Add(new Authority() { AuthorityValue = 2, AuthorityName = "2 - " });
authorityList.Add(new Authority() { AuthorityValue = 3, AuthorityName = "3 - " });
authorityList.Add(new Authority() { AuthorityValue = 4, AuthorityName = "4 - " });
authorityList.Add(new Authority() { AuthorityValue = 5, AuthorityName = "5 - " });
authorityList.Add(new Authority() { AuthorityValue = 6, AuthorityName = "6 - " });
this.DataContext = this;
}
private void btnUnselectall_Click(object sender, RoutedEventArgs e)
{
lstUserDefination.UnselectAll();
}
private void btnSelectAll_Click(object sender, RoutedEventArgs e)
{
lstUserDefination.SelectAll();
}
}
public class Authority
{
public string AuthorityName { get; set; }
public int AuthorityValue { get; set; }
public bool IsChecked { get; set; }
}
}
Add binding for IsChecked
property in ListBoxItem
template 在
ListBoxItem
模板中为IsChecked
属性添加绑定
<CheckBox Name="chkUser" Content="{Binding AuthorityName}" IsChecked="{Binding IsChecked}"/>
And change your button handlers to 并将您的按钮处理程序更改为
private void btnUnselectall_Click(object sender, RoutedEventArgs e)
{
foreach (var a in authorityList)
{
a.IsChecked = false;
}
}
private void btnSelectAll_Click(object sender, RoutedEventArgs e)
{
foreach (var a in authorityList)
{
a.IsChecked = true;
}
}
Note that your Authority
class should implement INotifyPropertyChanged
to make this work. 请注意,您的
Authority
类应该实现INotifyPropertyChanged
来完成这项工作。
public class Authority : INotifyPropertyChanged
{
private string authorityName;
private int authorityValue;
private bool isChecked;
public string AuthorityName
{
get { return authorityName; }
set
{
authorityName = value;
NotifyPropertyChanged();
}
}
public int AuthorityValue
{
get { return authorityValue; }
set
{
authorityValue = value;
NotifyPropertyChanged();
}
}
public bool IsChecked
{
get { return isChecked; }
set
{
isChecked = value;
NotifyPropertyChanged();
}
}
public event PropertyChangedEventHandler PropertyChanged;
private void NotifyPropertyChanged(string propertyName = "")
{
if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
}
}
}
Implement INotifyPropertyChanged
: 实现
INotifyPropertyChanged
:
public class Authority : INotifyPropertyChanged
{
private string _authorityName;
public string AuthorityName
{
get { return _authorityName; }
set { _authorityName = value; NotifyPropertyChanged(); }
}
private string _authorityValue;
public string AuthorityValue
{
get { return _authorityValue; }
set { _authorityValue = value; NotifyPropertyChanged(); }
}
private bool _isChecked;
public bool IsChecked
{
get { return _isChecked; }
set { _isChecked = value; NotifyPropertyChanged(); }
}
public event PropertyChangedEventHandler PropertyChanged;
private void NotifyPropertyChanged([CallerMemberName] String propertyName = "")
{
if (PropertyChanged != null)
PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
}
}
Set the IsChecked
property of all Authority
objects: 设置所有
Authority
对象的IsChecked
属性:
private void btnUnselectall_Click(object sender, RoutedEventArgs e)
{
Select(false);
}
private void btnSelectAll_Click(object sender, RoutedEventArgs e)
{
Select(true);
}
private void Select(bool select)
{
foreach (Authority authority in authorityList)
authority.IsChecked = select;
}
Bind the IsChecked
property in your XAML: 在您的XAML中绑定
IsChecked
属性:
<CheckBox Name="chkUser" IsChecked="{Binding IsChecked}" Content="{Binding AuthorityName}"/>
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