小编nos*_*ict的帖子

我想完成一项简单的任务.需要实现textbox lostfocus,当用户输入数据时,只要一个字段被填充并且他到达下一个字段,它就应该在前一个字段上激活验证功能.另外,我正在使用MVVM模式.

所以我有这门课

public class data : INotifyPropertyChanged
{

    public string name;
    public string Name
    {
        get
        {
            return name;
        }

        set
        {
            name = value;
            OnPropertyChanged("Name");
        }
    }
    public string firstname;
    public string FirstName
    {
        get
        {
            return firstname;
        }

        set
        {
            firstname = value;
            OnPropertyChanged("FirstName");
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;
    private void OnPropertyChanged(string propertyName)
    {
        if (this.PropertyChanged != null)
        {
            // Raise the PropertyChanged event
            this.PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
        }
    }
} 

在Viewmodel中我得到了这个

data1 = new data() { …