wpf - 强制 IDataErrorInfo 验证

Question

我在某些面板上有两个控件:文本框和组合框:

<TextBox Text="{Binding ShapeName, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged, ValidatesOnDataErrors=True}" />

<ComboBox SelectedItem="{Binding ActiveStageViewModel, Mode=OneWayToSource, UpdateSourceTrigger=PropertyChanged, ValidatesOnDataErrors=True}" />

当我在组合框上选择某些内容时，我需要强制对文本框进行 idataerrorinfo 验证。怎么做？

View 模型中的代码:

string IDataErrorInfo.this[string propertyName]
    {
      get
      {
        var error = string.Empty;

        if (propertyName == Expression.GetPropertyName(() => ActiveStageViewModel))
        {
          // TODO: Add functionality to force ShapeName property validation
          return error;
        }

        if (propertyName == Expression.GetPropertyName(() => ShapeName))
        {
          error = ValidateShapeName();
        }

        TooltipMessage = error;
        return error;
      }
    }

Answer 1

只需提高NotifyPropertyChanged您要验证的属性的事件，或者如果您使用 .NET 4.5 或 Silverlight 4，请使用 INotityDataErrorInfo .