如何在Xamarin IOS中向事件处理程序传递参数

Question

如何向事件处理程序传递字符串参数？

控制器（A） 编写事件处理程序。

    public event EventHandler ValueChanged; 

    void ResponseCompleted(object sender, CommonCode.ResponseEventArgs e){
        this.InvokeOnMainThread (delegate { 

        if (ValueChanged != null) {
        ValueChanged (this, new EventArgs (e.ResponseData));
// e.ResponseData is an String datatype.
         }
     });
    }

视图控制器（B）

relatedDataSource.ValueChanged += delegate {
 Get Response Data from ViewControllerA
}

- kiran

Answer 1

您可以使用通用的EventHandler。例如：

public event EventHandler<string> ValueChanged;

void ResponseCompleted(object sender, CommonCode.ResponseEventArgs e){
    this.InvokeOnMainThread (delegate { 

    var handler = ValueChanged;
    if (handler != null)
        handler(this, e.ResponseData);
    });
}

relatedDataSource.ValueChanged += (s, responseData) => {
    //Your data is in responseData variable
}

- Norfolc