Binding 之ObjectDataProvider数据源

ObjectDataProvider数据源它可以把对象作为数据源提供给Binding,可用于绑定函数，

实例如下

 

public partial class BindObiectDataProvider : Window
    {
        public BindObiectDataProvider()
        {
            InitializeComponent();
            SetBinding();
        }
        private void Button_Click(object sender, RoutedEventArgs e)
        {
            ObjectDataProvider odp = new ObjectDataProvider();
            odp.MethodName = "add";
            odp.ObjectInstance = new Calculator();
            odp.MethodParameters.Add("100");
            odp.MethodParameters.Add("200");
            MessageBox.Show(odp.Data.ToString());

        }
        private void SetBinding()
        {
            ObjectDataProvider odp = new ObjectDataProvider();//此类是把对象作为数据源提供给Binding
            odp.ObjectInstance = new Calculator();
            odp.MethodName = "add";//指定将要调用Calculator对象总的add方法
            odp.MethodParameters.Add("0");//相当于告诉odp去调用含有二个参数的add可以用于区分重载，
            odp.MethodParameters.Add("0");//类型敏感的因add参数为字符串，古此处也应字符串
            Binding bindingToArg1 = new Binding("MethodParameters[0]")//参数为绑定的路径
            {
                Source = odp,
                BindsDirectlyToSource = true,//告诉Binding对象只负责把从UI得到的数据写入Source(odp)而不是写入odp对象包装的Calculator对象中
                UpdateSourceTrigger = UpdateSourceTrigger.PropertyChanged//枚举值，用于指定更新立即将值回传到Source
            };
            Binding bindingToArg2 = new Binding("MethodParameters[1]")
            {
                Source = odp,
                BindsDirectlyToSource = true,
                UpdateSourceTrigger = UpdateSourceTrigger.PropertyChanged
            };
            Binding bindResulate = new Binding(".") { Source = odp };
            this.textBoxArg1.SetBinding(TextBox.TextProperty, bindingToArg1);
            this.textBoxArg2.SetBinding(TextBox.TextProperty, bindingToArg2);
            this.textBoxResult.SetBinding(TextBox.TextProperty, bindResulate);
        }
    }

 

 <StackPanel>
        <Button Content="绑定非暴露的属性(此处为返回值）" Click="Button_Click"></Button>
        <TextBox Margin="10" x:Name="textBoxArg1"></TextBox>
        <TextBox Margin="10" x:Name="textBoxArg2"></TextBox>
        <TextBox Margin="10" x:Name="textBoxResult"></TextBox>
    </StackPanel>

public  class Calculator
    {
      public string add(string str1,string str2)
      {
          double x = 0;
          double y = 0;
          double z = 0;
          if(double.TryParse(str1,out x)&&double.TryParse(str2,out y))
          {
              z = x + y;
              return z.ToString();
          }
          return "Input Error";
      }
    }