weixin_39964899的博客Window.ShowDialog() 返回值为bool?。...解决方法:ShowDialog()的注释为:// Returns:// A System.Nullable value of type System.Boolean that specifies whether// the activity was accepted (true) or c...
五花肉.的博客for (int i = 0; i < item.Controls.Count; i++) //System.NullReferenceException:“未将对象引用设置到对象的实例。” { var ss = item.Controls[i]; Type type = ss.GetType(); if (item.Controls[i]....