select @change="selectEchartsType" v-model="echartsType"
时间: 2023-11-14 19:04:43 浏览: 25
这是一个 Vue.js 的语法,其中 `@change="selectEchartsType"` 表示当 `echartsType` 的值发生改变时会触发名为 `selectEchartsType` 的方法,`v-model="echartsType"` 则表示将 `echartsType` 绑定到该元素上,使得其值可以通过该元素进行修改。具体实现的效果可能需要结合组件的具体实现来看。
相关问题
<!-- 棚号下拉框 --> <u-select @confirm="determineGreenHouse" v-model="showDetermineGreenHouse" :list="greenhouseList" @cancel="cancelShowCharts" mask-close-able="false" ></u-select> <!-- 区域下拉框 --> <u-select @confirm="determineArea" v-model="showDetermineArea" :list="plantAreaList" @cancel="cancelShowCharts" mask-close-able="false" ></u-select>写出区域分类查询,uniapp+uview
可以通过以下步骤实现区域分类查询:
1. 在 `data` 中定义两个变量 `selectedGreenhouse` 和 `selectedArea` 来存储用户选择的棚号和区域。
2. 在 `mounted` 生命周期中,调用获取棚号列表和区域列表的接口,并将返回的数据分别赋值给 `greenhouseList` 和 `plantAreaList`。
3. 在模板中,使用 `u-select` 组件分别展示棚号下拉框和区域下拉框,并绑定 `v-model` 属性到 `selectedGreenhouse` 和 `selectedArea` 变量上。
4. 在 `methods` 中定义 `determineGreenHouse` 和 `determineArea` 方法来处理用户选择棚号和区域的操作。这两个方法可以根据选择的棚号和区域,结合后端接口进行数据查询。
5. 在 `cancelShowCharts` 方法中,重置 `selectedGreenhouse` 和 `selectedArea` 变量,以便下一次查询时重新选择。
以下是示例代码:
```html
<template>
<view>
<u-select
@confirm="determineGreenHouse"
v-model="selectedGreenhouse"
:list="greenhouseList"
@cancel="cancelShowCharts"
mask-close-able="false"
></u-select>
<u-select
@confirm="determineArea"
v-model="selectedArea"
:list="plantAreaList"
@cancel="cancelShowCharts"
mask-close-able="false"
></u-select>
</view>
</template>
<script>
export default {
data() {
return {
selectedGreenhouse: '',
selectedArea: '',
greenhouseList: [],
plantAreaList: [],
};
},
mounted() {
// 调用获取棚号列表和区域列表的接口,并将返回的数据分别赋值给 greenhouseList 和 plantAreaList
},
methods: {
determineGreenHouse() {
// 根据选择的棚号,结合后端接口进行数据查询
},
determineArea() {
// 根据选择的区域,结合后端接口进行数据查询
},
cancelShowCharts() {
this.selectedGreenhouse = '';
this.selectedArea = '';
},
},
};
</script>
```
DECLARE @nmSupport NUMERIC(14,4),@nmOutst NUMERIC(14,4),@chPart VARCHAR(16) SELECT @chPart = 'XXX' SELECT @nmOutst = 0 SELECT @nmSupport = 0 UPDATE acdb.PAC06.AC06004A SET nmSupport = CASE WHEN chPart = @chPart THEN CASE WHEN nmQty > @nmOutst THEN @nmOutst ELSE nmQty END ELSE CASE WHEN nmQty > nmOutst THEN nmOutst ELSE nmQty END END, nmOutst = CASE WHEN chPart = @chPart then case when @nmOutst>=@nmSupport then @nmOutst-@nmSupport else 0 end else nmOutst-nmSupport END, @nmOutst = CASE WHEN chPart = @chPart then case when @nmOutst>=@nmSupport then @nmOutst-@nmSupport else 0 end else nmOutst-nmSupport END, @nmSupport = case when chPart = @chPart then case when nmQty > @nmOutst then @nmOutst else nmQty end ELSE CASE WHEN nmQty > nmOutst THEN nmOutst ELSE nmQty END end, @chPart = chPart改成用游标遍历的方式
好的,以下是将代码改写为使用游标遍历的方式:
```
DECLARE @nmSupport NUMERIC(14,4), @nmOutst NUMERIC(14,4), @chPart VARCHAR(16)
-- 声明游标
DECLARE cur CURSOR FOR
SELECT chPart, nmQty, nmOutst, nmSupport
FROM acdb.PAC06.AC06004A
-- 初始化变量
SET @chPart = 'XXX'
SET @nmOutst = 0
SET @nmSupport = 0
-- 打开游标
OPEN cur
-- 循环遍历游标中的每一行数据
FETCH NEXT FROM cur INTO @chPart, @nmQty, @nmOutst, @nmSupport
WHILE @@FETCH_STATUS = 0
BEGIN
-- 更新 nmSupport 和 nmOutst 字段的值
UPDATE acdb.PAC06.AC06004A
SET nmSupport = CASE
WHEN chPart = @chPart
THEN CASE
WHEN nmQty > @nmOutst
THEN @nmOutst
ELSE nmQty
END
ELSE CASE
WHEN nmQty > nmOutst
THEN nmOutst
ELSE nmQty
END
END,
nmOutst = CASE
WHEN chPart = @chPart
THEN CASE
WHEN @nmOutst >= @nmSupport
THEN @nmOutst - @nmSupport
ELSE 0
END
ELSE nmOutst - nmSupport
END
WHERE CURRENT OF cur
-- 更新变量的值
SET @nmOutst = CASE
WHEN chPart = @chPart
THEN CASE
WHEN @nmOutst >= @nmSupport
THEN @nmOutst - @nmSupport
ELSE 0
END
ELSE nmOutst - nmSupport
END
SET @nmSupport = CASE
WHEN chPart = @chPart
THEN CASE
WHEN nmQty > @nmOutst
THEN @nmOutst
ELSE nmQty
END
ELSE CASE
WHEN nmQty > nmOutst
THEN nmOutst
ELSE nmQty
END
END
SET @chPart = chPart
-- 继续遍历下一行数据
FETCH NEXT FROM cur INTO @chPart, @nmQty, @nmOutst, @nmSupport
END
-- 关闭游标
CLOSE cur
DEALLOCATE cur
```
以上代码使用游标遍历了表中的每一行数据,并按原代码的逻辑更新了 nmSupport 和 nmOutst 字段的值。同时,变量的更新也改为了在循环中进行。