如何将C?事件处理程序标记为“已处理”?

if (someCondition && uxExportResults.IsEnabled) { ... }

这将仅在启用控件时禁用它。

另一个选项是暂时禁用事件,如下所示:

private void ExportResults_IsEnabledChanged (object sender, DependencyPropertyChangedEventArgs e)
{
    if (some condition)
    {
        uxExportResults.IsEnabledChanged -= ExportResults_IsEnabledChanged;
        try
        {
            uxExportResults.IsEnabled = false; // this will cause another call to the event handler, eventually resulting in a stack overflow
        }
        finally
        {
            uxExportResults.IsEnabledChanged += ExportResults_IsEnabledChanged;
        }
    }
}

最简单的解决方案是在设置之前检查isenabled的值。

private void ExportResults_IsEnabledChanged (object sender, DependencyPropertyChangedEventArgs e)
{
  if (uxExportResults.IsEnabled == true)
  {
    uxExportResults.IsEnabled = false;
  }
}

另外,如果您能够更改按钮的代码,则除非值实际更改,否则isenabled不应发送事件。

public bool IsEnabled
{
  get { return isEnabled; }
  set
  {
    if(isEnabled != value)
    {
      isEnabled = value;
      IsEnabledChanged(this,args);
    }
  }
}