1.后臺模型類（一般定義主視窗類MainWindow的后臺模型類MainWindowModel）中增加命令空間參考using System.ComponentModel;
2.修改類MainWindowModel繼承INotifyPropertyChanged，定義事件PropertyChanged;
3.修改被前臺系結的屬性set值，
具體參見如下代碼：
public class MainWindowModel:INotifyPropertyChanged
{
public event PropertyChangedEventHandler PropertyChanged;
#region MES狀態
private string _MESState = "離線";
/// <summary>
///
/// </summary>
public string MESState
{
get { return _MESState; }
set
{
if (_MESState != value)
_MESState= value;
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("MESState"));
}
}
#endregion
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標籤：WPF
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