MVVM模式下ComboBox绑定

定义 ：

class CommonBox
    {
        public string Namepath { get; set; }
        public int Value { get; set; }
    }

//检测线路
        public List<CommonBox> checkLines { get; set; }
        public CommonBox checkLine { get; set; }
 
 this.checkLines = new List<CommonBox>();
 this.checkLines.Add(new CommonBox() { Namepath = "线路1", Value = 1 });
            this.checkLines.Add(new CommonBox() { Namepath = "线路2", Value = 1 });
            this.checkLine = this.checkLines[0];

xaml

 ItemsSource 绑定数据源，

 SelectedItem 当前项，

checkLine.Namepath != " " 判断当前项目是不是为空

<Label Content="检测线路:" HorizontalAlignment="Left" Margin="0,10,0,0" VerticalAlignment="Top"/>
                            <ComboBox HorizontalAlignment="Left" Margin="61,10,0,0" VerticalAlignment="Top" Width="120" 
                                      ItemsSource="{Binding checkLines}"
                                      DisplayMemberPath="Namepath"
                                      SelectedItem="{Binding checkLine}"/>