zoukankan      html  css  js  c++  java
  • Tips: Save some typing when binding values to UI in WPF/Silverlight

    As we all know, In WPF or Silverlight application, if we want to update the value in the UI when the underlying data has changed, the class need to implement the "INotifyPropertyChanged” interface, which contains one delegate "PropertyChangedEventHandler”.

    So create a new method, and take the incoming parameter and pass it to the event argument, make sure call the method every time when the property has changed. just like the standard textbook said.

    How about create that method this way:

    Import System.Runtime.CompilerServices namespace.

     

            public event PropertyChangedEventHandler PropertyChanged;
     
            private void OnPropertyChanged([CallerMemberName]string caller = "")
            {
                if (PropertyChanged != null)
                {
                    PropertyChanged(this, new PropertyChangedEventArgs(caller));
                }
            }

     

    With [CallerMemberName] attribute, you don’t have to explicit pass in the property name anymore, just call it in the set part, Framework will take care of the rest. like this:

            private string _foo;
            public string Foo
            {
                get
                {
                    return _foo
                }
                set
                {
                    _foo= value;
                    OnPropertyChanged();
                }
            }

    It’s not some big or fancy things, but maybe your keyboard will live longer. Fingers crossed

    Happy Coding Everyday~ 快乐编码,享受生活~
  • 相关阅读:
    LR11中自定义函数web_custom_request请求
    lr总结
    LR-事务
    LR参数和变量
    lr_save_searched_string函数的使用介绍
    python中判断变量的类型
    python中使用%与.format格式化文本
    应用图层的符号设置
    arcgis python 联合和合并
    arcgis python对于输出参数,获得ERROR 000840: 该值不是 要素类。
  • 原文地址:https://www.cnblogs.com/tedzhang/p/3132007.html
Copyright © 2011-2022 走看看