Introduction to the second part of WPF (1)

Part 2 travel to the internal world of WPF

Chapter 2 Introduction to Binding

6.1 status of Data Binding in WPF

Applications have a three-tier structure, namely the data storage layer, data processing layer, and data presentation layer. The storage layer is equivalent to a city's storage zone, which consists of a database and a file system. The processing layer should be called the logic layer more correctly, algorithms related to business logic and used for data processing are concentrated here; the function of the presentation layer is to display processed data to users through a visual interface or other types of interfaces to other applications.

The essence of a program is the data plus algorithm.

6.2 Binding Basics

[Csharp]
Using System. ComponentModel;
 
Namespace FirstWpfApplication. Objects
{
Class Student: INotifyPropertyChanged
{
Private string name;
Public string Name
{
Get {return this. name ;}
Set
{
This. name = value;
// Trigger the System. ComponentModel. INotifyPropertyChanged. PropertyChanged event
PropertyChanged. Invoke (this, new PropertyChangedEventArgs ("Name "));
}
}
 
Public event PropertyChangedEventHandler PropertyChanged;
}
}

Using System. ComponentModel;

Namespace FirstWpfApplication. Objects
{
Class Student: INotifyPropertyChanged
{
Private string name;
Public string Name
{
Get {return this. name ;}
Set
{
This. name = value;
// Trigger the System. ComponentModel. INotifyPropertyChanged. PropertyChanged event
PropertyChanged. Invoke (this, new PropertyChangedEventArgs ("Name "));
}
}

Public event PropertyChangedEventHandler PropertyChanged;
}
}

[Html]
<Grid>
<Grid. RowDefinitions>
<RowDefinition Height = "25"/>
<RowDefinition Height = "5"/>
<RowDefinition Height = "25"/>
<RowDefinition Height = "5"/>
<RowDefinition Height = "25"/>
</Grid. RowDefinitions>
<TextBox x: Name = "textBox1" BorderBrush = "Black" Grid. Row = "0"/>
<TextBox x: Name = "textBox2" BorderBrush = "Black" Grid. Row = "2"/>
<Button x: Name = "button1" Content = "OK" Click = "button#click" Grid. Row = "4"/>
</Grid>

<Grid>
<Grid. RowDefinitions>
<RowDefinition Height = "25"/>
<RowDefinition Height = "5"/>
<RowDefinition Height = "25"/>
<RowDefinition Height = "5"/>
<RowDefinition Height = "25"/>
</Grid. RowDefinitions>
<TextBox x: Name = "textBox1" BorderBrush = "Black" Grid. Row = "0"/>
<TextBox x: Name = "textBox2" BorderBrush = "Black" Grid. Row = "2"/>
<Button x: Name = "button1" Content = "OK" Click = "button#click" Grid. Row = "4"/>
</Grid>
[Csharp]
Public partial class MainWindow: Window
{
Student stu;
 
Public MainWindow ()
{
InitializeComponent ();
 
Stu = new Student ();
 
Binding binding = new Binding ();
Binding. Source = stu;
Binding. Path = new PropertyPath ("Name ");
 
BindingOperations. SetBinding (this. textBox1, TextBox. TextProperty, binding );
}
 
Private void button#click (object sender, RoutedEventArgs e)
{
Stu. Name = textBox2.Text;
}
}

Public partial class MainWindow: Window
{
Student stu;

Public MainWindow ()
{
InitializeComponent ();

Stu = new Student ();

Binding binding = new Binding ();
Binding. Source = stu;
Binding. Path = new PropertyPath ("Name ");

BindingOperations. SetBinding (this. textBox1, TextBox. TextProperty, binding );
}

Private void button#click (object sender, RoutedEventArgs e)
{
Stu. Name = textBox2.Text;
}
}