标准解释: ListboxVisualization as listbox in which a list of entries is displayed with one short description each. Listbox with keyVisualization as listbox whose entries display both the key and the description. 分析:很多情况下我们难以找到它们之间的区别,是因为我们在GUI的全局设置里设置了以下
参考:MySQL中KEY.PRIMARY KEY.UNIQUE KEY.INDEX 的区别 对于题目中提出的问题,可以拆分来一步步解决.在 MySQL 中 KEY 和 INDEX 是同义.那这个问题就可以简化为 PRIMARY KEY,UNIQUE KEY 和 INDEX 的区别.而这三者也正好是索引的划分,主键索引,唯一索引和普通索引(INDEX). 使用 INDEX 来加速从数据库中读取数据.INDEX 通常加在那些 JOIN, WHERE,和 ORDER BY 子句的列上. 创建索引时,需
在create table的语句中,key和index混淆在一起,官方手册中的解释是这样: KEY is normally a synonym for INDEX. The key attribute PRIMARY KEY can also be specified as just KEY when given in a column definition. This was implemented for compatibility with other database systems.
截图如下: 1.实现Converter 获取到listbox,并得到listitem在listbox中的index public class ItemContainerToZIndexConverter : IValueConverter { public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture) { var i