This is my Dodel:
public string Name { get; set; }
public string Id { get; set; }
public string Age { get; set; }
public string Description { get; set; }
This is my ListView column:
<GridViewColumn Header="Name">
<GridViewColumn.CellTemplate>
<DataTemplate>
<TextBlock x:Name="textBlock"
Text="{Binding Description}"
ToolTip="{Binding Description}"/>
</DataTemplate>
</GridViewColumn.CellTemplate>
</GridViewColumn>
So in case i want to see in my ToolTip all my properties for example:
name + "\n" + Id + "\n" + Age + + "\n" + Description
Here is what I would have done for that:
<DataTemplate>
<DataTemplate.Resources>
<ToolTip x:Key="Tip">
<TextBlock>
<Run Text="{Binding Name}"/>
<LineBreak/>
<Run Text="{Binding Age, StringFormat='Age: {0}'}"/>
</TextBlock>
</ToolTip>
</DataTemplate.Resources>
<TextBlock Text="{Binding Description}" ToolTip="{StaticResource Tip}"/>
</DataTemplate>
I used Runs so you can Bind Name and other properties on after the other with complete customisation.
Why not add a new string type property to your Model and combine all of them in the constructor.
If you really want to do it this way, this may help you.
Related
I am trying to Group my collection which is based on my following model:
public class Person
{
public string FirstName { get; set; }
public string LastName { get; set; }
public Role PersonRole { get; set; }
}
public class Role
{
public int Id { get; set; }
public string RoleName { get; set; }
}
My PersonCollection,
public ObservableCollection<Person> PersonList;
The collection is populated with three Person object, two with identical roles.
I want to group all my persons as per their RoleName. I have the following XAML:
<Grid.Resources>
<CollectionViewSource x:Key="cvs" Source="{Binding PersonList}">
<CollectionViewSource.GroupDescriptions>
<PropertyGroupDescription PropertyName="PersonRole.RoleName"/>
</CollectionViewSource.GroupDescriptions>
</CollectionViewSource>
</Grid.Resources>
<ListBox ItemsSource="{Binding Source={StaticResource cvs}}">
<ListBox.ItemTemplate>
<DataTemplate>
<TextBlock Text="{Binding FirstName}"/>
</DataTemplate>
</ListBox.ItemTemplate>
<ListBox.GroupStyle>
<GroupStyle>
<GroupStyle.HeaderTemplate>
<DataTemplate>
<TextBlock Text="{Binding PersonRole.RoleName}" FontWeight="Bold" Background="ForestGreen" Margin="0,5,0,0"/>
</DataTemplate>
</GroupStyle.HeaderTemplate>
</GroupStyle>
</ListBox.GroupStyle>
</ListBox>
However the rendered UI is not displaying the grouped RoleName in the list box. Also I would like to show the grouping horizontally where the groups appear horizontally while the grouped items appear vertically. Appreciate any help in advance.
Here's the output I am seeing:
Since you have already provided GroupDescriptons at your CollectionViewSource, groupStyle will pick the property name from there only.
All you need is to bind with Name property of CollectionViewGroup class to access the value of the property on which grouping is applied. In group style, binding is against CollectionViewGroup class and not against your Model class.
So, this is how you will do it:
<TextBlock Text="{Binding Name}" FontWeight="Bold"
Background="ForestGreen" Margin="0,5,0,0"/>
And regarding to align groups horizontally, you can set ItemsPanelTemplate of Group to be VirtualizingStackPanel with Orientation set to Horizontal which makes your groups to be aligned horizontally.
<ListBox.GroupStyle>
<GroupStyle>
<GroupStyle.Panel>
<ItemsPanelTemplate>
<VirtualizingStackPanel Orientation="Horizontal"/>
</ItemsPanelTemplate>
</GroupStyle.Panel>
<GroupStyle.HeaderTemplate>
<DataTemplate>
<TextBlock Text="{Binding Name}" FontWeight="Bold"
Background="ForestGreen" Margin="0,5,0,0"/>
</DataTemplate>
</GroupStyle.HeaderTemplate>
</GroupStyle>
</ListBox.GroupStyle>
A ListView displays a collection of the following class:
public class Employee
{
private string _department;
private string _manager;
private string _name;
private string _address;
public string Department
{
get { return _department; }
}
public string Manager
{
get { return _manager; }
}
public string Name
{
get { return _name; }
}
public string Address
{
get { return _address; }
}
}
There is a 1-to-1 relation between Department and Manager, so any 2 rows with the same department will also have the same manager.
I want to group by Department/Manager, with the group header showing "Department (Manager)".
My CollectionViewSource looks like
<CollectionViewSource x:Key="cvsEmployees" Source="{Binding Employees}">
<CollectionViewSource.GroupDescriptions>
<PropertyGroupDescription PropertyName="Department" />
<PropertyGroupDescription PropertyName="Manager" />
</CollectionViewSource.GroupDescriptions>
</CollectionViewSource>
The plan is to not display the first level header (Department) and to somehow bind to both the Department (1st level) and the Manager (2nd level) from the 2nd level header.
3 questions:
To avoid displaying the 1st level header, I have an empty data template in the groupstyle:
<GroupStyle>
<GroupStyle.HeaderTemplate>
<DataTemplate>
</DataTemplate>
</GroupStyle.HeaderTemplate>
</GroupStyle>
This seems very clunky. Is there a more elegant way to skip a group header?
How do I bind to the 1st grouping level property (Department) from the 2nd level header (Manager) to achieve the required "Department (Manager)" ?
Is there a better way to do this than creating 2 grouping level?
Thanks
Solved the main stumbling block, question 2 above: how to bind from the group header to a property that is not the grouping property.
The solution is to change the data context to:{Binding Items}. The ItemSource properties are then available
<GroupStyle>
<GroupStyle.HeaderTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal" Margin="0,10,0,3" DataContext="{Binding Items}" >
<TextBlock Text="{Binding Path=Department}" FontWeight="Bold" Margin="3"/>
<TextBlock Text="{Binding Path=Manager, StringFormat='({0})'}" Margin="3"/>
</StackPanel>
</DataTemplate>
</GroupStyle.HeaderTemplate>
</GroupStyle>
I would create another model part, which represents the dual grouping that you need to have happen:
Model Classes:
public class EmployeeModel {
private readonly Employee _Employee;
public DepartmentManager ManagementInfo { get; private set; }
public string Name {
get { return _Employee.Name; }
}
public string Address {
get { return _Employee.Address; }
}
public EmployeeModel(Employee employee) {
this._Employee = employee;
this.ManagementInfo = new DepartmentManager(employee.Department, employee.Manager);
}
}
public class DepartmentManager {
public string Department { get; private set; }
public string Manager { get; private set; }
public DepartmentManager(string dept, string manager) {
this.Department = dept;
this.Manager= manager;
}
public override bool Equals(object obj) {
var model = obj as DepartmentManager;
if(null == model)
return false;
return Department.Equals(model.Department, StringComparison.InvariantCultureIgnoreCase) &&
Manager.Equals(model.Manager, StringComparison.InvariantCultureIgnoreCase);
}
}
XAML:
<CollectionViewSource x:Key="cvsEmpsModel" Source="{Binding EmployeesModel}">
<CollectionViewSource.GroupDescriptions>
<PropertyGroupDescription PropertyName="ManagementInfo" />
</CollectionViewSource.GroupDescriptions>
</CollectionViewSource>
<DataTemplate DataType="{x:Type models:EmployeeModel}">
<StackPanel Orientation="Horizontal">
<TextBlock Text="{Binding Name}" />
<TextBlock Text="{Binding Address}" />
</StackPanel>
</DataTemplate>
...
<ListView ItemsSource="{Binding Source={StaticResource cvsEmpsModel}}">
<ListView.GroupStyle>
<GroupStyle>
<GroupStyle.HeaderTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal" Margin="0,10,0,3" DataContext="{Binding Items}">
<TextBlock Text="{Binding Path=ManagementInfo.Manager}" FontWeight="Bold" Margin="3" />
<TextBlock Text="{Binding Path=ManagementInfo.Department, StringFormat='({0})'}" Margin="3" />
</StackPanel>
</DataTemplate>
</GroupStyle.HeaderTemplate>
</GroupStyle>
</ListView.GroupStyle>
</ListView>
Then in your Window/ViewModel:
this.EmployeesModel = new ObservableCollection<EmployeeModel>(MyListOfEmployersFromDB.Select(e => new EmployeeModel(e)));
Note, I've overriden Equals in the DepartmentManager class, but not GetHashCode, ideally you should do a custom implementation of that. I had to override equals so the grouping view source would correctly group the same entries. You could get rid of this need, buy constructing the DepartmentManager for the same Employees outside of the collection, and pass them into the EmployeeModel ctr.
Does anybody know how to binding two ObservableCollections in one ListBox?
these two ObservableCollections both have a Property string "name" to display in the ListBox,
int the ListBox top area, will display the ObservableCollection1 items and in the ListBox bottom area I want display the ObservableCollection2 items, how to do that?
<ListBox x:Name="m_CtrlMediaList" Grid.Column="2" AllowDrop="True" SelectionMode="Extended">
<ListBox.ItemsSource>
<CompositeCollection>
<CollectionContainer Collection="{Binding directorys}"/>
<CollectionContainer Collection="{Binding files}"/>
</CompositeCollection>
</ListBox.ItemsSource>
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Vertical">
<TextBlock Text="{Binding name, Mode=OneWay}" FontWeight="Bold" FontSize="14"/>
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
the data is like:
class ElementFile
{
...
string name (get;set;}
...
}
class ElementDirectory
{
...
string name (get;set;}
...
public ObservableCollection<ElementDirectory> directorys { get; set; }
public ObservableCollection<ElementFile> files { get; set; }
...
}
Why can not display the "name"?
The composite collection is what you are looking for. Example.
I am new to WPF and MVVM. After a long invention i got to know how to retrieve data from database and bind it to a itemcontrol/listview/gridview.
But my problem i am not getting how to read bunch of textbox values and store as a new record in database.
Here is my sample code..
View
<ItemsControl ItemsSource="{Binding AllEmployees}">
<ItemsControl.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<TextBox Width="100" Text="{Binding FirstName}" Margin="4"/>
<TextBox Width="100" Text="{Binding LastName}" Margin="4"/>
<TextBox Width="100" Text="{Binding Age}" Margin="4"/>
</StackPanel>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
<!-- For new Employee Details -->
<StackPanel>
<TextBox x:Name="FirstName"/>
<TextBox x:Name="LastName"/>
<TextBox x:Name="Age"/>
<Button Content="New" Command="{Binding NewEmployeeCommand}"/>
</StackPanel>
My cs file is
public ObservableCollection<DataAccess.Employee> AllEmployees
{
get;
private set;
}
public EmployeeListViewModel(EmployeeRepository employeeRepository)
{
if (employeeRepository == null)
{
throw new ArgumentNullException("employeeRepository");
}
_employeeRepository = employeeRepository;
this.AllEmployees = new ObservableCollection<DataAccess.Employee>
(_employeeRepository.ListAll());
}
Now how could i store a new employee Firstname, Lastname, Age in database by reading those text boxes..
How to write function for NewEmployeeCommand event to read the textboxes( mapping of textboxes to appropriate datafileds in database) and store the data in database.
Thanks a Lot !
if you're trying to use MVVM just need to:
Create your ViewModel to contain all the properties your View needs
Bind to those properties in Xaml
For example:
public class EmployeeListViewModel
{
public ObservableCollection<Employee> AllEmployees {get;private set;}
public string FirstName {get;set;}
public string LastName {get;set;}
public int? Age {get;set;}
public ICommand NewEmployeeCommand {get;set;}
//You need to connect to this method by using a Delegate/RelayCommand see link below
public void AddNewEmployee()
{
//Add your real code here to actually insert into the db
var result = InsertEmployeeIntoDatabase(FirstName,LastName,Age);
//You probably want to add this new employee to the list now ;)
AllEmployees.Add(result);
//Now you probably want to reset your fields
FirstName = null;
LastName = null;
Age = null;
}
}
Click here for an implementation of a delegate command
And then just edit your xaml like this:
<ItemsControl ItemsSource="{Binding AllEmployees}">
<ItemsControl.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<TextBox Width="100" Text="{Binding FirstName}" Margin="4"/>
<TextBox Width="100" Text="{Binding LastName}" Margin="4"/>
<TextBox Width="100" Text="{Binding Age}" Margin="4"/>
</StackPanel>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
<!-- For new Employee Details -->
<StackPanel>
<TextBox Text={Binding FirstName}"/>
<TextBox Text={Binding LastName}"/>
<TextBox Text={Binding Age}"/>
<Button Content="New" Command="{Binding NewEmployeeCommand}"/>
</StackPanel>
You could pass references in the command parameter:
<StackPanel>
<TextBox x:Name="FirstName"/>
<TextBox x:Name="LastName"/>
<Button Content="New" Command="{Binding NewEmployeeCommand}">
<Button.CommandParameter>
<x:Array Type="{x:Type TextBox}">
<x:Reference Name="FirstName"/>
<x:Reference Name="LastName"/>
</x:Array>
</Button.CommandParameter>
</Button>
</StackPanel>
Depending on what kind of event you use you case the parameter and get the values:
TextBox[] textBoxes = e.Parameter as TextBox[]; //RoutedEvent
TextBox[] textBoxes = parameter as TextBox[]; //If the executed handler provides the parameter
string firstName = textBoxes[0].Text;
string lastName = textBoxes[1].Text;
//create entry; store in DB
Via binding:
<Button.CommandParameter>
<local:MyEntry FirstName="{Binding ElementName=FirstName, Path=Text}"
LastName="{Binding ElementName=LastName, Path=Text}"/>
</Button.CommandParameter>
MyEntry entry = parameter as MyEntry;
//store in DB
you dont read the Textbox values. you need a NewEmployeeViewModel and bind the TextBoxes to the properties.
EDIT:
just create a class with INotifyPropertyChanged and the Properties you need.
public class NewEmployee : INotifyPropertyChanged
{
public string FirstName
{
get{return this._firstname;}
set{this._firstname = value;
OnPropertyChanged("FirstName");}
}
//... other properties
}
xaml
<StackPanel DataContext={Binding MyNewEmployeeProperty}>
<TextBox x:Name="FirstName" Text={Binding FirstName}/>
<TextBox x:Name="LastName" Text={Binding LastName}/>
<TextBox x:Name="Age" Text={Binding Age}/>
<Button Content="New" Command="{Binding NewEmployeeCommand}"/>
</StackPanel>
I got the Correct answer.
My New entry form in xmal Should be
<StackPanel>
<TextBox Text={Binding Employee.FirstName}"/>
<TextBox Text={Binding Employee.LastName}"/>
<TextBox Text={Binding Employee.Age}"/>
<Button Content="New" Command="{Binding NewEmployeeCommand}"/>
</StackPanel>
My cs file
public class EmployeeListViewModel : INotifyPropertyChanged
{
Employee _employee;
RelayCommand _addNewEmployee;
EmployeeRepository _employeeRepository;
public Employee Employee
{
get
{
return _employee;
}
set
{
_employee = value;
OnPropertyChanged("Employee");
}
}
public void NewEmployeeCommand()
{
if(_addNewEmployee == null)
{
_addNewEmployee = new RelayCommand( param => NewEmployeeCommandExecute(),
param => NewEmployeeCommandCanExecute
);
}
}
void NewEmployeeCommandExecute()
{
_employeeRepository.Add(Employee);
_employeeRepository.Save();
}
bool NewEmployeeCommandCanExecute
{
get
{
return true;
}
}
}
I have a window MainWindow.xaml and
private static Tutorial tutorial; there.
Also I have class Structure.cs where I describe child types
public class Tutorial
{
public string Name { get; set; }
public IList<Chapter> Chapters = new List<Chapter>();
}
public class Chapter
{
public string Name { get; set; }
public IList<Unit> Units = new List<Unit>();
}
public class Unit
{
public string Name { get; set; }
public IList<Frame> Frames = new List<Frame>();
...
}
I want to bind tutorial structure to treeview. How can I do this?
I tried this way.
<TreeView Grid.Row="2" x:Name="treeViewStruct" Margin="5,0,5,0" Background="LemonChiffon" BorderBrush="Bisque" BorderThickness="1" ScrollViewer.VerticalScrollBarVisibility="Auto" IsTextSearchEnabled="True" Cursor="Hand">
<TreeView.Resources>
<HierarchicalDataTemplate DataType = "{x:Type Structure:Chapter}"
ItemsSource = "{Binding Path=Units}">
<TextBlock Text="{Binding Path=Name}"/>
</HierarchicalDataTemplate>
<DataTemplate DataType="{x:Type Structure:Unit}">
<TextBlock Text="{Binding Path=Name}"/>
</DataTemplate>
</TreeView.Resources>
</TreeView>
It doesn't work.
Please, help! I'm a newbie in WPF. I need dynamic tree
so that when I add a chapter or a unit in the object tutorial, tree is updated.
And for this way of binding please throw the idea how can I get a collection item, when I selected some tree node.
This may help :
<HierarchicalDateTemplate DataType = "{x:Type local:Tutorial}"
ItemsSource="{Binding Chapters}">
<TextBlock Text="{Binding Name}"/>
</HierarchicalDateTemplate>
<HierarchicalDateTemplate DataType = "{x:Type local:Chapter}"
ItemsSource="{Binding Units}"
<TextBlock Text="{Binding Name}"/>
</HierarchicalDateTemplate>
<DateTemplate DataType = "{x:Type local:Unit}"
<TextBlock Text="{Binding Name}"/>
</DateTemplate>