jQuery 增改删查(2)
下拉框
![在这里插入图片描述](https://img-blog.csdnimg.cn/20200818123436115.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L20wXzQ2MzUwOTM5,size_16,color_FFFFFF,t_70#pic_center)
新增操作
ReturnJson msg = new ReturnJson();
Msg.State = false;
条件判断 里面的参数要注意
![在这里插入图片描述](https://img-blog.csdnimg.cn/2020081812350523.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L20wXzQ2MzUwOTM5,size_16,color_FFFFFF,t_70#pic_center)
验证是否重复
![在这里插入图片描述](https://img-blog.csdnimg.cn/20200818123537322.png#pic_center)
开启事务 图片处理
![在这里插入图片描述](https://img-blog.csdnimg.cn/20200818123551249.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L20wXzQ2MzUwOTM5,size_16,color_FFFFFF,t_70#pic_center)
新增数据
![在这里插入图片描述](https://img-blog.csdnimg.cn/20200818123607970.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L20wXzQ2MzUwOTM5,size_16,color_FFFFFF,t_70#pic_center)
视图方面
获取回填参数
![在这里插入图片描述](https://img-blog.csdnimg.cn/20200818123629181.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L20wXzQ2MzUwOTM5,size_16,color_FFFFFF,t_70#pic_center)
请求 关键字var layerIndex = layer.load();
![在这里插入图片描述](https://img-blog.csdnimg.cn/202008181237528.png#pic_center)
![在这里插入图片描述](https://img-blog.csdnimg.cn/20200818124014260.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L20wXzQ2MzUwOTM5,size_16,color_FFFFFF,t_70#pic_center)
修改操作 查询 两个操作 public
![在这里插入图片描述](https://img-blog.csdnimg.cn/20200818124047715.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L20wXzQ2MzUwOTM5,size_16,color_FFFFFF,t_70#pic_center)
第二个public
![在这里插入图片描述](https://img-blog.csdnimg.cn/20200818124114941.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L20wXzQ2MzUwOTM5,size_16,color_FFFFFF,t_70#pic_center)
数据不能重复
![在这里插入图片描述](https://img-blog.csdnimg.cn/20200818124136130.png#pic_center)
开启事务
![在这里插入图片描述](https://img-blog.csdnimg.cn/20200818124148756.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L20wXzQ2MzUwOTM5,size_16,color_FFFFFF,t_70#pic_center)