深入浅出WPF 第二部分(8)

6.3.11 使用ObjectDataProvider对象作为Binding的Source

ObjectDataProvider，顾名思义就是把对象作为数据源提供给Binding。前面还提到过XmlDataProvider，也就是把XML数据作为数据源提供给Binding。这个类的父类都是DataSourceProvider。

public MainWindow()        {            InitializeComponent();            SetBinding();        }        private void SetBinding()        {            ObjectDataProvider odp = new ObjectDataProvider();            odp.ObjectInstance = new Calculator();            odp.MethodName = "Add";            odp.MethodParameters.Add("0");            odp.MethodParameters.Add("0");            this.textBox1.SetBinding(TextBox.TextProperty, new Binding()                {                    Source = odp,                    Path = new PropertyPath("MethodParameters[0]"),                    BindsDirectlyToSource = true,                    UpdateSourceTrigger=UpdateSourceTrigger.PropertyChanged                });            this.textBox2.SetBinding(TextBox.TextProperty, new Binding()                {                    Source = odp,                    Path = new PropertyPath("MethodParameters[1]"),                    BindsDirectlyToSource = true,                    UpdateSourceTrigger=UpdateSourceTrigger.PropertyChanged                });            this.textBlock1.SetBinding(TextBlock.TextProperty, new Binding()                {                    Source = odp,                    Path = new PropertyPath("."),                });        }    }    public class Calculator    {        public string Add(string arg1, string arg2)        {            double x = 0;            double y = 0;            double z = 0;            if (double.TryParse(arg1, out x) && double.TryParse(arg2, out y))            {                z = x + y;                return z.ToString();            }            return "Input error!";        }    }