C# wpf xaml 绑定到在后面的代码中创建的对象
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wpf xaml binding to object created in code behind
提问by xnonamex
Just to start off I am quite new to C# and xaml.
刚开始，我对 C# 和 xaml 还很陌生。
I have watched, checked tutorials, about binding, but most of what I have seen create an object in the xaml. However I want to create the object in the code and then bind to it's properties. Furthermore I will have several objects defined in code later on. In general I want to bind to text boxes.
我看过、检查过关于绑定的教程，但我所看到的大部分内容都在 xaml 中创建了一个对象。但是我想在代码中创建对象，然后绑定到它的属性。此外，稍后我将在代码中定义几个对象。一般来说，我想绑定到文本框。
In general my code looks something like this:
一般来说，我的代码看起来像这样：
MainWindow.xaml.cs
主窗口.xaml.cs
public partial class MainWindow : Window
{
MyTestObject myTestObject;
public MainWindow()
{
myTestObject= new MyTestObject ();
this.DataContext = this;
InitializeComponent();
}
}
MyTestObject .cs
我的测试对象 .cs
class MyTestObject : INotifyPropertyChanged
{
public MyTestObject ()
{
}
private string testString = "Test";
public string TestString
{
get { return testString; }
set
{
if (value == testString) return;
testString = value;
this.OnPropertyChanged("TestString");
}
}
public event PropertyChangedEventHandler PropertyChanged;
protected void OnPropertyChanged(string propertyName)
{
if (PropertyChanged != null)
this.PropertyChanged(this, new System.ComponentModel.PropertyChangedEventArgs(propertyName));
}
}
Eventually I will have quite a lot of (numerical) properties, which will be displayed in several text boxes, because the software is intended as an interface to an external hardware component that sends measured data. I have tried several ways of binding but I have not succeeded yet. I would be most grateful for an example how to bind the previously mentioned property to a TextBox.
最终我将拥有相当多的（数字）属性，它们将显示在几个文本框中，因为该软件旨在作为发送测量数据的外部硬件组件的接口。我尝试了几种绑定方法，但还没有成功。我将非常感谢如何将前面提到的属性绑定到TextBox.
采纳答案by Michael G
Set the Datacontext to myTestObject. Or, make a public property for myTestObject and set your Xaml binding to {Binding MyTestObjectPropertyHere.TestString}
将数据上下文设置为 myTestObject。或者，为 myTestObject 创建一个公共属性并将您的 Xaml 绑定设置为 {Binding MyTestObjectPropertyHere.TestString}
For example:
例如：
public partial class MainWindow : Window
{
MyTestObject myTestObject;
public MainWindow()
{
myTestObject = new MyTestObject ();
this.DataContext = myTestObject;
InitializeComponent();
}
}
Xaml
xml
<TextBox Text="{Binding Path=TestString}" />
Example with binding to the MainWindow as the datacontext:
绑定到 MainWindow 作为数据上下文的示例：
public partial class MainWindow : Window
{
MyTestObject myTestObject;
public MyTestObject MyTestObjectProperty { get { return myTestObject; } }
public MainWindow()
{
myTestObject = new MyTestObject ();
this.DataContext = this;
InitializeComponent();
}
}
Xaml
xml
<TextBox Text="{Binding Path=MyTestObjectProperty.TestString}" />
