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C# MVC System.Web.Mvc.WebViewPage<TModel>.Model.get returned null

I am encountering a strange issue. I have a dropdown list for countries in a form that is populated from the Controller. ... joins to itself, I was not the one who created it....

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sts开发工具导入gradle构建的springboot项目报错，什么原因？

setting.gradle文件配置如下：点击Build Model按钮后：控制台报错：...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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商品多图、或者动态多图（微博多图）的数据表如何设计？

目前在做一个发布动态的功能，类似微博和朋友圈的动能里面涉及到可以支持发布9张图片现在需要设计多张图片和动态表的结构关联在动态表topic表里有图片字段pic，第一种思路，存放图片名称用逗号分割或json存放 A ... "100002", "3": "100003", } 不知道大家在设计这种表结构的时候用的什么方案？哪种方式更好，为什么？...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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configuration - File replacements in angular.json causing errors in Angular 11 library

I created an Angular 11 library. Inside the angular.json file for the library workspace, I am trying to add fileReplacements ... is causing the issue. Please help me out with this....

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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raspbian - systemd, python-service can't copy to /etc/

I have a python service that is running via systemd on a raspberry-pi. I want to use subprocess.call to copy a ... have permission problems? Is there a neat way to solve this?...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c# - Access is denied. (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED))' firewall INetFwPolicy2

Access is denied. private void MakeRule(string IP, int Protocole, NET_FW_RULE_DIRECTION_ ruleDirection, string ruleName) { Type ... catch (Exception ex) { throw ex; } }...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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C++ 如何从将遍历带中文的字符串呢？

我现在需要从一个 utf-8 文件中读取文本内容，然后将文件内容读入到 std::string中但是由于 u8 中文字符的长度是不定的，处理起来相当麻烦，而且还要区分带 bom 的和不带 bom 的文件请问也没有更简 ... } } 附带一些有关链接 unicode编码中一个汉字占几个字节？汉字 Unicode 编码范围 C++输出中文字符(转)...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c# - How to get type of TKey and TValue given a Dictionary<TKey,TValue> type

I want to get type of TKey and TValue given a Dictionary<TKey,TValue> type. eg. If type is Dictionary<Int32,String ... to get keyType = typeof(Int32) and valueType = typeof(String)...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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火狐浏览器 input 上禁用鼠标右键取消默认系统菜单失效

火狐浏览器下将input 设置为 disable=“true” 原本已经屏蔽的鼠标右键功能在不可编辑的input上再次出现系统默认菜单而正常的input确实可以实现屏蔽右键功能其他浏览器均正常...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c# - Load object from xml, edit values in a dynamic UI and save back to xml

I just read and applied it to the dynamic object on the panel for the container, the label for the title, the ... resources> I have no prior knowledge of parsing Xml with C#....

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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请问类似这种立体的效果图，用什么实现比较好

...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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asynchronous - ClojureScript cljs.core.async/go doesn't work inside jsdom

I am trying to migrate ClojureScript tests from "Chrome Headless" to jsdom using Karma and shadow-cljs as test runners. ... : "dangerously", pretendToBeVisual: true } } }) };...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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vue 使用webpack打包，怎么生成单个的页面

我们现在的项目，打包之后生成一个index.html入口文件，因为这个入口文件引用的js太多，现在我想打包之后生成两个入口文件，不同入口文件引用不同的js怎么实现...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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vue 打包dist 文件太大，怎么解决？

下面是我进行npm run dist 的webpack，但是打包出来的sendMessageQj.js文件有7MB多，就是有几个组件，然后打包出来了，还有一个编辑器的源码，还可以再从这个文件 ... false } }), new webpack.LoaderOptionsPlugin({ minimize: true }) ]) } install.js...

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sql server select * from table where columns in list

My table: id ppvnid varid prdid partnerid 19 8 1 9 1 20 8 3 9 1 21 8 5 9 1 22 10 1 9 1 23 10 3 9 1 24 10 6 9 1...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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webpack - Symfony bundle - managing assets

I am creating a symfony bundle. I don't understand how to deal with assets in my bundle. I am used to Webpack Encore and ... to solve this. Thank you in advance, have a great day....

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c# - Migrating database connection string from appconfig.json to Environment Variable

I have a .Net 5 Web API hosted as an Azure App Service. The app connects to a MySql database, also hosted on ... 'd like to get it working on my development machine first. Thanks...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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acumatica - Prepare Payments page not showing PayDate after adding a filter

I added a new filter to Prepare payment(AP503000). The filter works as expected. After testing I realized that the Pay Date( ... } else { yield return item; } } } #endregion } }...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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微信小程序地图中translateMarker 的rotate 是有旋转中心吗？为什么自动旋转怪怪的

因为公司需求使用uniapp 开发小程序，在地图模块中使用了translateMarker，但是用了之后发现translateMarker的旋转角度不对我设置的是 autoRotate:true 发现它自己旋转的角度怪怪的，难道它有自己的想法？本来想给大家动图 ... 线的原因吗？还是说旋转角度的原因？希望大佬或者官方出来帮忙指正一下是什么原因，蟹蟹~...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Angular route parameter from parent cannot be retrieved

I have a strange issue where I have the following route setup: const routes: Routes = [ { path: '', component: ... ); Am I missing something? Sorry for my bad english......

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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iview按需加载问题

vue-cli4，按需加载时，Tree的加载有问题 import { Table, Page, Tree } from 'view-design' components: { Table: Table, Page: Page, Tree: Tree },...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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css文本溢出隐藏出错了

我设置的这个文本溢出隐藏在正常宽度下可以正常显示为什么窗口缩小后文本的位置就变了呢？掉下去了我本来不想给文字加宽度的，但是如果不给宽度的话文字直接就下去了 ... : ellipsis; display: -webkit-box; -webkit-line-clamp: 4; -webkit-box-orient: vertical; } } }...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mysql 插入当前时间now()失败

//?新增班级 router.post('/class/add',common.jsonParser,(req, res) => { let sql = `INSERT?INTO?class(class_id,class_name,createTime)?VALUES?(' ... 2020-09-12 就成功，写成now()就插入失败这是什么原因啊？...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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objective c - UIView not centered after pushing UIViewController

I'm using objective-c in my project. I want to show a new UIViewController (for example A) with navigation bar this ... device, why this is happening and how to resolve my problem?...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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antd的form组件能否一个大name对应多个小name

如果可以的话，这样做写Form内的组件很方便翻遍了文档，只有Form.List有这个功能，但是Form.List毕竟是做动态增删表单的，它设计的子name只能是数组，这样在某些场景就很不方便，有没有更好的办法 <Form.List ... { bar: 'xxx' } ] ... } 这里的list要是支持对象就好了，某些场景下数组确实很不方便 ...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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连接字符串的区别？

str += “a”+”b” str = str + “a” + “b” 计算过程有什么区别 ps:《高性能JavaScript》说下式运算速度更快一点。...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - RLLib tunes PPOTrainer but not A2CTrainer

I am making a comparison between both kind of algorithms against the CartPole environment. Having the imports as: import ray ... I've coded something wrong. Is this a common issue?...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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nginx中的uptream是否不支持被嵌套？

原配置写成： #Dynamic Server list upstream dynamic_server_group { server dn1.xxx.com; } #Static Server list upstream static_server_group { ... 请问是否nginx不支持在location中嵌套使用多个upsteam设置？...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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