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?

来自viewmodel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;
      }
    }

最佳答案

只需针对要验证的属性引发NotifyPropertyChanged事件,或者如果您位于.NET 4.5或Silverlight 4中,请使用INotityDataErrorInfo

关于wpf - 强制进行IDataErrorInfo验证,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/13378474/

10-14 22:48