BusyIndicator using MVVM 忙碌状态指示器的的实现

ViewModel 视图模型

public abstract class ViewModelBase : INotifyPropertyChanged
{
    private bool isbusy;

    public bool IsBusy
    {
        get
        {
            return isbusy;
        }
        set
        {
            isbusy = value;
            RaisePropertyChanged("IsBusy");
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;

    protected void RaisePropertyChanged(string propertyName)
    {
        PropertyChangedEventHandler handler = PropertyChanged;

        if (handler != null)
        {
            handler(this, new PropertyChangedEventArgs(propertyName));
        }
    }
}

View 视图

<extWpfTk:BusyIndicator IsBusy="{Binding IsBusy}">
        <ContentControl />
    </extWpfTk:BusyIndicator>

当 IsBusy = true 时，　　BusyIndicator 就开始显示出来

参考网址 http://stackoverflow.com/questions/12384012/busyindicator-using-mvvm

Extended WPF Toolkit 下载地址 http://wpftoolkit.codeplex.com/releases/view/99072