瞄到BindingGroup用法

文章转载于https://www.cnblogs.com/dangnianxiaoqingxin/p/12653988.html

2.BindingGroup的使用

 public class MyClass 
    {             
        public int StartValue { get; set; }    
        public int EndValue { get; set; } 
    }

 public class RangeValidationRule : ValidationRule
    {
        public override ValidationResult Validate(object value, CultureInfo cultureInfo)
        {
            BindingGroup bindingGroup = (BindingGroup)value;
            MyClass mc = (MyClass)bindingGroup.Items[0];
            int startValue = (int)bindingGroup.GetValue(mc, "StartValue");
            int endValue = (int)bindingGroup.GetValue(mc, "EndValue");
            bool isEnabled = (bool)bindingGroup.GetValue(mc, "IsEnabled");

            if (startValue > endValue)
            {
                return new ValidationResult(true, null);
            }

            return new ValidationResult(false, "Input should between 0 and 100");
        }
    }

 MyClass mc = new MyClass();
        public MainWindow()
        {
            InitializeComponent();
         
            this.DataContext = mc;
        }

 <Grid Name="Grid1" Width="400" Height="300" >
       
        <Grid.RowDefinitions>
            <RowDefinition/>
            <RowDefinition/>
            <RowDefinition/>
        </Grid.RowDefinitions>
        <Grid.BindingGroup>
            <BindingGroup NotifyOnValidationError="True">
                <BindingGroup.ValidationRules >
                    <local:RangeValidationRule2 ValidationStep="ConvertedProposedValue"  />
                </BindingGroup.ValidationRules>
            </BindingGroup>
        </Grid.BindingGroup>
        <TextBox Grid.Row="0" Name="tb1" Text="{Binding StartValue}">
           
        </TextBox>
        <TextBox Grid.Row="1" Text="{Binding EndValue}"/>
        <Button Name="btn1" Content="btn1" Grid.Row="2" Click="Button_Click"  >
          
           
        </Button>
    </Grid>

验证：

  this.Grid1.BindingGroup.CommitEdit();

文章转载于https://www.cnblogs.com/dangnianxiaoqingxin/p/12653988.html