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C# Lodop与C-Lopdop选择打印机

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原文：https://www.cnblogs.com/huaxie/p/9766886.html https://www.cnblogs.com/huaxie/p/10857490.html https://blog.csdn.net/zhou120189162/article/details/79937432 //SET_PRINTER_INDEX(oIndexOrName);按序号或名称指定打印机，选定后禁止手工重选； CreateOneFormPage(); LODOP.SET_PRINT_MODE("TRYLINKPRINTER_NOALERT",true);//这个语句设置网络共享打印机连接不通时是否提示一下 if (LODOP.SET_PRINTER_INDEX(0))//这里指定第0号打印机打印 LODOP.PRINT(); 1.C-Lopdop选择打印机(C-Lodop特有的函数Create_Printer_List) C-Lodop获取打印机列表Create_Printer_List，此方法Lodop不支持，是C-Lodop特有的函数，客户端本地打印单独用c-lodop，或集中打印等，可以获得本机或云主机的打印机列表。 2.Lodop选择打印机 <head> <meta http-equiv="Content-Type" content="text/html;

Opencart - Customer uploads different files to one product with different responses from the site

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问题 I am using Opencart 1.5.6 and I have two file upload options for one product. One option is an image and the other is a video. I am setting it up to show a preview of the image once they upload. In catalog/controller/product/product.php under public function upload() I have changed the code as follows to get a thumbnail image and change the success message: if (!$json && is_uploaded_file($this->request->files['file']['tmp_name']) && file_exists($this->request->files['file']['tmp_name'])) {

How to get attribute from selected option of select in jQuery?

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I have the next selectbox in HTML: <select id="listbox-taskStatus" class="selectpicker"> <option status="0">In progress</option> <option status="1">Not started</option> <option status="2">Done</option> <option status="3">Failed</option> </select> I want to read the attribute value from selected option. If just to take the value, it's simple: var value = $('#listbox-taskStatus').val(); But what should I do, if I want to get the attribute value from selected option? I know, that .attr() must help, but when I tried to use it I've got the incorrect result. I've tried the next: var status = $('

How to create HTML select option from JSON hash?

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I have a simple JSON code: [{'1':'Name'}, {'2', 'Age'}, {'3','Gender'}] I have a select tag in my HTML: <select name="datas" id="datas"></select> I need a simple way to create HTML select box from this JSON, like this: <select name="datas" id="datas"> <option value="1">Name</option> <option value="2">Age</option> <option value="3">Gender</option> </select> Just for kicks here is an answer in pure javascript, also you probably do not need an array for this just a simple object will suffice <select name="datas" id="datas"></select> <script> html = ""; obj = { "1" : "Name", "2": "Age", "3" :

thymeleaf multiple selected on edit

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I am totally changing this question, as part of it was answered here with great help of Avnish! Tom sent me to the right direction so thank you Tom! My problem is that I do not know how to tell Thymeleaf to preselect object elements when editing it. Let me show you: This solution works: <select class="form-control" id="parts" name="parts" multiple="multiple"> <option th:each="part : ${partsAtribute}" th:selected="${servisAttribute.parts.contains(part)}" th:value="${part.id}" th:text="${part.name}">Part name</option> </select> I have tried this: <select class="form-control" th:field="*{parts}"

Haproxy调度器详细介绍

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测试环境: 调度器:Haproxy: IP : 192.168.4.5/24 客户端:client : IP : 192.168.4.10/24 一.Haproxy 特点: 1.它是免费,快速并且可靠的一种解决方案 2.适用于那些负载特别大的web站点,这些站点通常又需要会话保持或七层处理 3.提供高可用性,负载均衡以及基于TCP和HTTP应用的代理二.Haproxy 工作模式 1.mode http #客户端请求被深度分析后在发往服务器 2.mode tcp #4层调度,不检查第7层信息 3.mode health #仅做健康状态检查,使用的频率很低. 三.Haproxy:配置文件说明: 配置文件可由如下部分构成: 1.defaults: 为后续的其他部分设置缺省参数缺省参数可以被后续部分重置 2.frontend 描述接收客户端侦听套接字集 3.backend 描述转发链接的服务器集 4.listen 把frontend和backend结合到一起的完整声明四.配置文件板块说明 /etc/haproxy/haproxy.cfg global log 127.0.0.1 local2 ##[err warning info debug] chroot /usr/local/haproxy pidfile /var/run/haproxy.pid #

React Warning: flattenChildren(…): Encountered two children with the same key

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Could someone please explain how to fix this error Warning: flattenChildren(...): Encountered two children with the same key I have replicated my code below, but for some reason CodePen is not showing the error. var FilterOptions = React.createClass({ changeOption: function(type, e) { var val = e.target.value; this.props.changeOption(val, type); }, render: function() { return ( <div className="filter-options"> <div className="filter-option"> <select id="product" name="Product" value={this.props.product} onChange={this.changeOption.bind(this, 'product')}> <option value=''>Product</option> {this

Convert a List of Options to an Option of List using Scalaz

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I want to transform a List[Option[T]] into a Option[List[T]] . The signature type of the function is def lo2ol[T](lo: List[Option[T]]): Option[List[T]] The expected behavior is to map a list that contains only Some s into a Some containing a list of the elements inside the elements Some 's. On the other hand, if the input list has at least one None , the expected behavior is to just return None . For example: scala> lo2ol(Some(1) :: Some(2) :: Nil) res10: Option[List[Int]] = Some(List(1, 2)) scala> lo2ol(Some(1) :: None :: Some(2) :: Nil) res11: Option[List[Int]] = None scala> lo2ol(Nil : List

Python--Click

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Click Click 是 Flask 的开发团队 Pallets 的另一款开源项目，它是用于快速创建命令行的第三方模块。我们知道，Python 内置了一个 Argparse 的标准库用于创建命令行，但使用起来有些繁琐， Click 相比于 Argparse ，就好比 requests 相比于 urllib 。 Click 是一个第三方库，因此，在使用之前需要先安装： pip install click 参考文档 http://click.pocoo.org/6/options/ Click 对argparse 的主要改进在易用性，使用Click 分为两个步骤：使用 @click.command() 装饰一个函数，使之成为命令行接口；使用 @click.option() 等装饰函数，为其添加命令行选项等。看一下官方文档的入门例子： import click @click.command() @click.option('--count', default=1, help='Number of greetings.') @click.option('--name', prompt='Your name', help='The person to greet.') def hello(count, name): """Simple program that greets

vue js select下拉框

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<template> <ul id="select"> <li> <div class="select-head"> <span class="select-head-cont">{{cont}}</span> <span class="select-icon">▼</span> </div> <ul class="option"> <li class="option-item" v-for="v in 10" @click="optionClick(v-1)">{{v-1}}</li> </ul> </li> </ul> </template> <style type="text/css"> ul,li{ list-style: none; padding: 0; margin: 0; } /*下拉框样式*/ #select{ margin-right: .05rem; background: rgba(0,0,0,0); width: .5rem; height: .28rem; font-family: "微软雅黑"; font-size: 16px; color: white; border: 1px #DDDDDD solid; border-radius: 3px; } .select-head{ overflow: hidden; width: 100%;

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