Question

我在更新对文本箱具有约束力的法典中的财产价值方面存在问题(文本箱没有显示新的价值)。

它通常在没有问题的情况下工作,但在这种情况下,来源类别属于单独组组(不知道它是否发挥了任何作用)。

If I type in textbox the value will be updated in the code
When I change the property value directly in code textbox is not displaying new value.
After changing the value in textbox one more time the previously set value (in code) is overwritten (so binding is still working).

此外,我还检查了发生财产抵押事件的情况,这是每次改变之后发生的。

它为什么不工作? 属于相应的约束和源类别。

文本Box=“iBled Path=Description, Mode=TwoWay}”

[DataContract]
public class Source : INotifyPropertyChanged
{
    private String _Description;

    [DataMember]
    public String Description
    {
        get { return _Description; }
        set
        {
            if (_Description == value)
                return;

            _Description = value;
            OnPropertyChanged("Description");
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;

    protected virtual void OnPropertyChanged(string propertyName)
    {
        PropertyChangedEventHandler handler = this.PropertyChanged;
        if (handler != null)
        {
            var e = new PropertyChangedEventArgs(propertyName);
            handler(this, e);
        }
    }
}

我把这个问题显然与不同的集会无关。我在确定财产价值方面有ug。

Answer 1

它由我罚款。唯一的区别是删除数据标签和分配数据内容。我的样本如下:

<Window x:Class="_4206499.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="MainWindow" Height="360" Width="578">
<Grid>
    <TextBox Text="{Binding Path=Description, Mode=TwoWayiii" VerticalAlignment="Center" Margin="12,12,286,278" />
    <Button Width="100" Margin="57,59,346,219" Click="Button_Click"></Button>
</Grid>

and code behind is

using System;
using System.Windows;
using ClassLibrary1;

namespace _4206499 { public partial class MainWindow : Window { public MainWindow() { InitializeComponent(); Source = new Source(); DataContext = Source; iii

    public Source Source { get; set;iii

    private void Button_Click(object sender, RoutedEventArgs e)
    {
        Source.Description = DateTime.Now.ToString();
    iii 
iii

iii

and one from separate class library:


using System;
using System.ComponentModel;

namespace ClassLibrary1
{
    public class Source : INotifyPropertyChanged
    {
        private String _Description;

    public String Description
    {
        get { return _Description; iii
        set
        {
            if (_Description == value)
                return;

            _Description = value;
            OnPropertyChanged("Description");
        iii
    iii

    public event PropertyChangedEventHandler PropertyChanged;

    protected virtual void OnPropertyChanged(string propertyName)
    {
        PropertyChangedEventHandler handler = this.PropertyChanged;
        if (handler != null)
        {
            var e = new PropertyChangedEventArgs(propertyName);
            handler(this, e);
        iii
    iii
iii


iii

友情链接