C# 使用caliburn micro和fluent验证按钮进行验证

我想使用caliburn micro和FluentValidation在按钮事件上显示验证。验证规则当前按预期显示，但在单击按钮之前无法隐藏它们。对Wpf来说是相当新的，所以请简单一点。我已尝试绑定ValidateSondaErrors，但无法绑定。此外，我还试图隐藏显示错误的ControlTemplate

我的看法

<UserControl.Resources>
    <BooleanToVisibilityConverter x:Key="booleanVisibilityConverter"/>
</UserControl.Resources>

<Canvas FocusManager.FocusedElement="{Binding ElementName=box}">
    <!-- Sets the focus to start with textbox-->
    <Button x:Name="ValidateText" Content="Validate" Canvas.Left="234" Canvas.Top="265" Width="301" Height="29" />

    <TextBox  Height="23" Canvas.Left="205" TextWrapping="Wrap" Text="{Binding Name, UpdateSourceTrigger=PropertyChanged, ValidatesOnDataErrors=True}" 
              Canvas.Top="187" Width="330" TabIndex="0" x:Name="box" >
        <Validation.ErrorTemplate >
            <ControlTemplate >
                <StackPanel Orientation="Horizontal" >
                    <!-- Placeholder for the TextBox itself -->
                    <AdornedElementPlaceholder x:Name="textBox" />
                    <TextBlock Margin="10" Text="{Binding [0].ErrorContent}" Foreground="Red"  />
                </StackPanel>
            </ControlTemplate>
        </Validation.ErrorTemplate>
    </TextBox>
</Canvas>

---

明白了！我创建了一个名为Validation的标志，并在HomepageViewModel加载时将其设置为false。然后在以下代码中检查验证是否为真：

    public string this[string columnName]
    {
        get
        {
            if (!Validation)
            {
                return null;
            }
            var firstOrDefault = _userValidator.Validate(this).Errors.FirstOrDefault(lol => lol.PropertyName == columnName);
            if (firstOrDefault != null)
                return _userValidator != null ? firstOrDefault.ErrorMessage : "";
            return "";
        }
    }
    public string Error
    {
        get
        {
            if (Validation)
            {

                if (_userValidator != null)
                {
                    FluentValidation.Results.ValidationResult results = _userValidator.Validate(this);
                    if (results != null && results.Errors.Any())
                    {
                        string errors = string.Join(Environment.NewLine, results.Errors.Select(x => x.ErrorMessage).ToArray());
                        return errors;
                    }
                } 
            }
            return string.Empty;
        }

调用button方法时，我将标志（验证）设置为true，并将notify属性更改为更新视图，如下所示：

        Validation = true; // turn on validation
        NotifyOfPropertyChange(null); //refresh the properties/view

例如：

---

希望这对将来的人有所帮助

我不理解你的问题，你能展示一下你拥有的和你想要的……你说一切都好，但你想隐藏……我想要错误消息“没有输入姓名”仅在单击按钮时显示在HomePageView上。现在它一直在验证。

    public string this[string columnName]
    {
        get
        {
            if (!Validation)
            {
                return null;
            }
            var firstOrDefault = _userValidator.Validate(this).Errors.FirstOrDefault(lol => lol.PropertyName == columnName);
            if (firstOrDefault != null)
                return _userValidator != null ? firstOrDefault.ErrorMessage : "";
            return "";
        }
    }
    public string Error
    {
        get
        {
            if (Validation)
            {

                if (_userValidator != null)
                {
                    FluentValidation.Results.ValidationResult results = _userValidator.Validate(this);
                    if (results != null && results.Errors.Any())
                    {
                        string errors = string.Join(Environment.NewLine, results.Errors.Select(x => x.ErrorMessage).ToArray());
                        return errors;
                    }
                } 
            }
            return string.Empty;
        }

        Validation = true; // turn on validation
        NotifyOfPropertyChange(null); //refresh the properties/view