WPF 界面与后台双向数据绑定

    <Label x:Name="lbScore1" Content="{Binding Score1, Mode=TwoWay}" Width="200" FontSize="15" VerticalContentAlignment="Center" HorizontalContentAlignment="Center"/>
            <Label x:Name="lbScore2" Content="{Binding Score2, Mode=TwoWay}"  Width="200" FontSize="15" VerticalContentAlignment="Center" HorizontalContentAlignment="Center"/>
            <Label x:Name="lbScore3" Content="{Binding Score3, Mode=TwoWay}"  Width="200" FontSize="15" VerticalContentAlignment="Center" HorizontalContentAlignment="Center"/>
            <Label x:Name="lbScore4" Content="{Binding Score4, Mode=TwoWay}"  Width="200" FontSize="15" VerticalContentAlignment="Center" HorizontalContentAlignment="Center"/>
            <Label x:Name="lbScore5" Content="{Binding Score5, Mode=TwoWay}"  Width="200" FontSize="15" VerticalContentAlignment="Center" HorizontalContentAlignment="Center"/>

1.UI界面里面的Label绑定数据，双向绑定用TwoWay，默认为OneWay，这儿必须加上Mode=TwoWay。

 

  public class UserScore : INotifyPropertyChanged
    {
        private string userName;
        private string score1;
        private string score2;
        private string score3;
        private string score4;
        private string score5;

        public string UserName
        {
            get
            {
                return userName;
            }
            set
            {
                this.userName = value;
            }
        }

        public string Score1
        {
            get
            {
                return score1;
            }
            set
            {
                this.score1 = value;//value转到定义，?其实就是public int age//这里暂时不知道这种机制

                if (PropertyChanged != null)//如果没有点击实现接口，就没有propertychanged这个成员
                {
                    this.PropertyChanged.Invoke(this, new PropertyChangedEventArgs(Score1));
                }
            }
        }
        public string Score2
        {
            get
            {
                return score2;
            }
            set
            {
                this.score2 = value;

                if (PropertyChanged != null)
                {
                    this.PropertyChanged.Invoke(this, new PropertyChangedEventArgs(Score2));
                }
            }
        }
        public string Score3
        {
            get
            {
                return score3;
            }
            set
            {
                this.score3 = value;

                if (PropertyChanged != null)
                {
                    this.PropertyChanged.Invoke(this, new PropertyChangedEventArgs(Score3));
                }
            }
        }
        public string Score4
        {
            get
            {
                return score4;
            }
            set
            {
                this.score4 = value;

                if (PropertyChanged != null)
                {
                    this.PropertyChanged.Invoke(this, new PropertyChangedEventArgs(Score4));
                }
            }
        }
        public string Score5
        {
            get
            {
                return score5;
            }
            set
            {
                this.score5 = value;

                if (PropertyChanged != null)
                {
                    this.PropertyChanged.Invoke(this, new PropertyChangedEventArgs(Score5));
                }
            }
        }

        public event PropertyChangedEventHandler PropertyChanged;
    }

2.后台类代码：必须为INotifyPropertyChanged接口类， public class UserScore : INotifyPropertyChanged //在此要选择INotifyPropertyChanged，右键，解析得到命名空间，但还要增多一步：选择INotifyPropertyChanged，右键，实现接口。

 

     private void BindingData()
        {
            for (int i = 0; i < 10; i++)
            {
                ctlList[i].lbScore1.DataContext = scoreList[curPage * 10 + i];
                ctlList[i].lbScore2.DataContext = scoreList[curPage * 10 + i];
                ctlList[i].lbScore3.DataContext = scoreList[curPage * 10 + i];
                ctlList[i].lbScore4.DataContext = scoreList[curPage * 10 + i];
                ctlList[i].lbScore5.DataContext = scoreList[curPage * 10 + i];
            }
        }

3.cs后台添加数据绑定对象，scoreList链表里面存放的是UserScore接口类，ctlList存放的是控件。这样就实现了双向数据绑定，任何一方改变都会有更新，在通过数据库数据对接，就基本上实现了数据的双向通信。