求解 [问题点数:20分]

Bbs1
本版专家分:0
结帖率 0%
Linq 之 Select 和 where 的用法
最近开始学习linq.自己也总结一下,方便以后查阅。 Select 同 Sql 中的 select 类似,即输出我们要的东东,感觉在 linq 中更加强大。Linq 可以对集合如数组、泛型等操作,这里我们对泛型类型进行举例。建一个类如下:public class Customer { public Customer(string firstName, string ...
C# Linq处理 Where条件筛选
C# Linq处理 Where条件筛选
Linq where
我要做的是什么操作呢 就是查询出数据库某一张表中的指定字段里面的指定数据 例如: 我需要这张表里面的FaresID字段中 1,3,5 这三条数据,那么我们该怎么获取到我们想要的数据呢? 此时我们就需要使用下面这一个方法 简单且快捷 首先给一个整数类型的数组 然后再用where进行条件筛选 要用到Contains这个方法 那么这个方法是做什么的呢 contains是包含的意思,例如:“abc”...
求教 大神拉姆达表达式一个小问题
GroupBy(x=>x.Cycle_starttime).Select(g=> (new { monthly = g.Key.Month.ToString(),count=g.Count(),g.S
linq join on 多条件查询 or 连接
select * from tabel1 inner join table2 on tabel1.id = table2.recipegroupid or tabel1.id = table2.rec
求解~求解~求解~求解~求解~求解~求解
问题是这样rnrn我设置Session过期时间是30分钟 过期后进入登陆页面rnrn当我执行了一个GV删除操作rnrn删除完毕后 session就过期了rnrn再点击进入其他需要验证session的页面就需要重新登陆了rnrn也就操作了1分钟时间 session怎么会过期呢?
解析xml的问题---- 求解求解求解求解求解求解求解求解求解求解求解求解求解求解求解求解
我用java调用servlet,程序如下rn[code=Java]rnURL url = new URL(s);rnrn HttpURLConnection con = (HttpURLConnection) url.openConnection();rn con.setRequestMethod("POST");rn con.setRequestProperty("Proxy-Connection", "Keep-Alive");rn con.setRequestProperty("Content-Type", "application/xml");rn con.setDoOutput(true);rn con.setDoInput(true);rn[/code]rn用con.getInputStream();可以把取过来的值读出来,结果如下格式rn[code=XML]rn rn rn rn rn 0.0 rn 0.0 rn rn rn 0.0 rn 0.0 rn rn rnrn[/code]rnrn我最后要取出这个结果的item里面的值。我就要把con.getInputStream();读出来转成xml对象在读取。怎么做
项目后台报这样的错-----求解指点--求解--求解--求解--求解--求解--求解--求解--求解--求解--
2015-9-22 9:19:17 org.apache.catalina.core.StandardWrapperValve invokern严重: Servlet.service() for servlet action threw exceptionrncom.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown column 'segmentinf0_.flight_no' in 'field list'rn at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)rn at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)rn at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)rn at java.lang.reflect.Constructor.newInstance(Constructor.java:513)rn at com.mysql.jdbc.Util.handleNewInstance(Util.java:389)rn at com.mysql.jdbc.Util.getInstance(Util.java:372)rn at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:980)rn at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3835)rn at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3771)rn at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2435)rn at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2582)rn at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2535)rn at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1911)rn at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:2034)rn at com.mchange.v2.c3p0.impl.NewProxyPreparedStatement.executeQuery(NewProxyPreparedStatement.java:76)rn at org.hibernate.jdbc.AbstractBatcher.getResultSet(AbstractBatcher.java:208)rn at org.hibernate.loader.Loader.getResultSet(Loader.java:1812)rn at org.hibernate.loader.Loader.doQuery(Loader.java:697)rn at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:259)rn at org.hibernate.loader.Loader.loadCollection(Loader.java:2019)rn at org.hibernate.loader.collection.CollectionLoader.initialize(CollectionLoader.java:59)rn at org.hibernate.persister.collection.AbstractCollectionPersister.initialize(AbstractCollectionPersister.java:587)rn at org.hibernate.event.def.DefaultInitializeCollectionEventListener.onInitializeCollection(DefaultInitializeCollectionEventListener.java:83)rn at org.hibernate.impl.SessionImpl.initializeCollection(SessionImpl.java:1744)rn at org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:366)rn at org.hibernate.collection.AbstractPersistentCollection.read(AbstractPersistentCollection.java:108)rn at org.hibernate.collection.AbstractPersistentCollection.readSize(AbstractPersistentCollection.java:131)rn at org.hibernate.collection.PersistentSet.size(PersistentSet.java:162)rn at com.pojos.QNEOrder.object2json(QNEOrder.java:2135)rn at com.actions.QNE_OrderAction.getOrderByJSON(QNE_OrderAction.java:5162)rn at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)rn at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)rn at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)rn at java.lang.reflect.Method.invoke(Method.java:597)rn at org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:270)rn at org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:187)rn at org.springframework.web.struts.DelegatingActionProxy.execute(DelegatingActionProxy.java:113)rn at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431)rn at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)rn at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)rn at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)rn at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)rn at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)rn at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)rn at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)rn at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)rn at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)rn at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)rn at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)rn at org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:198)rn at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)rn at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)rn at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)rn at com.sxy.file.JudgeSessionFilter.doFilter(JudgeSessionFilter.java:45)rn at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)rn at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)rn at com.system.PurviewFilter.doFilter(PurviewFilter.java:142)rn at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)rn at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)rn at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)rn at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)rn at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)rn at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)rn at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)rn at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)rn at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:861)rn at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:606)rn at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)rn at java.lang.Thread.run(Thread.java:662)[img=https://forum.csdn.net/PointForum/ui/scripts/csdn/Plugin/003/monkey/11.gif][/img]
求解 求解 求解
Does this code compile? rn 1. class SubEx extends Exception rn 2.rn 3. class Parent rn 4. void foo(int i) throws SubEx rn 5. if (i > 20)rn 6. throw new Exception();rn 7. rn 8. rn 9.rn10. class Kid extends Parent rn11. void foo(int i) throws Exception //errorrn12. if (i < 20)rn13. throw new SubEx();rn14. rn15. rnrn为什么错,请讲讲
求解。。。求解。。。求解
selectrnisnull(sum(case when cAlarmtype='火警' then 1 else 0 end),0) as F1,rnisnull(sum(case when cAlarmtype='故障' then 1 else 0 end),0) as F2,rnisnull(sum(case when cAlarmtype='管理信息' then 1 else 0 end),0) as F3rnfrom tabrn有需求,当 F1和F2、F3同时等于0的时候就查不出这条数据。rn当然我知道这写法不对,但就这意思:where (F1 !=0 AND F2 !=0 AND F3 !=0)rn求大神解答,因为我用了分页的存储过程,能在where 里面做判断么?
C#之Linq、where()、FindAll()的区别
对于实现了IEnumerable接口的类、类型、集合可以使用Linq、Linq的扩展方法where()、FindAll()来查询符合谓词约束的数据。这三者之间执行的方式是不一样的,同样的数据同样的查询条件返回的结果也不相同。先上代码再分析。 public static void LaterSelect() { var names = new List {
.net mvc 中如何多表查询数据
Strong.IBLL.ISysUserService _userService = new SysUserService(); public ActionResult GetAllUserInfo
C#linq语句的多个实体和多个where查询条件进行查询
.AsEnumerable()延迟执行,不会立即执行。当调用.AsEnumerable()的时候,实际上什么都没有发生。 .ToList()则是立即去执行 下面的两个实体类的多条件查询就是运用了先AsEnumerable,再ToList,这样可以直接执行一次,不然就去执行多次ToList using (var db = new DB()) { ...
linq多表连接+where+max的问题 高手进
from g in datacontext.Users_meals join h in datacontext.Users on g.Userid equals h.Userid group g by
为什么我写的linq中where没有生效啊!!
-
启动项目报这样的错,--求解--求解--求解--求解--求解--求解--求解--求解--
2015-9-19 17:18:58 org.apache.catalina.core.StandardContext listenerStartrn严重: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListenerrnorg.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataLimitDao' defined in file [E:\tomcat6036\webapps\sxyerp\WEB-INF\classes\financeBean.xml]: Cannot resolve reference to bean 'sessionFactory' while setting bean property 'sessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory' defined in file [E:\tomcat6036\webapps\sxyerp\WEB-INF\classes\applicationContext.xml]: Invocation of init method failed; nested exception is org.hibernate.DuplicateMappingException: Duplicate collection role mapping com.pojos.QNEOrder.passengersrn at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:328)rn at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:106)rn at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1308)rn at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1067)rn at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:511)rn at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:450)rn at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:290)rn at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)rn at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:287)rn at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:189)rn at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:562)rn at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:871)rn at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:423)rn at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:272)rn at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:196)rn at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:47)rn at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4206)rn at org.apache.catalina.core.StandardContext.start(StandardContext.java:4705)rn at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:799)rn at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:779)rn at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:601)rn at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1079)rn at org.apache.catalina.startup.HostConfig.deployDirectories(HostConfig.java:1002)rn at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:506)rn at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1317)rn at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:324)rn at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:142)rn at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1065)rn at org.apache.catalina.core.StandardHost.start(StandardHost.java:840)rn at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1057)rn at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:463)rn at org.apache.catalina.core.StandardService.start(StandardService.java:525)rn at org.apache.catalina.core.StandardServer.start(StandardServer.java:754)rn at org.apache.catalina.startup.Catalina.start(Catalina.java:595)rn at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)rn at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)rn at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)rn at java.lang.reflect.Method.invoke(Method.java:597)rn at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)rn at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)rnCaused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory' defined in file [E:\tomcat6036\webapps\sxyerp\WEB-INF\classes\applicationContext.xml]: Invocation of init method failed; nested exception is org.hibernate.DuplicateMappingException: Duplicate collection role mapping com.pojos.QNEOrder.passengersrn at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1403)rn at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:513)rn at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:450)rn at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:290)rn at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)rn at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:287)rn at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:189)rn at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:322)rn ... 39 morernCaused by: org.hibernate.DuplicateMappingException: Duplicate collection role mapping com.pojos.QNEOrder.passengersrn at org.hibernate.cfg.Mappings.addCollection(Mappings.java:147)rn at org.hibernate.cfg.HbmBinder.createClassProperties(HbmBinder.java:2085)rn at org.hibernate.cfg.HbmBinder.createClassProperties(HbmBinder.java:2060)rn at org.hibernate.cfg.HbmBinder.bindRootPersistentClassCommonValues(HbmBinder.java:381)rn at org.hibernate.cfg.HbmBinder.bindRootClass(HbmBinder.java:295)rn at org.hibernate.cfg.HbmBinder.bindRoot(HbmBinder.java:166)rn at org.hibernate.cfg.Configuration.add(Configuration.java:716)rn at org.hibernate.cfg.Configuration.addInputStream(Configuration.java:551)rn at org.springframework.orm.hibernate3.LocalSessionFactoryBean.buildSessionFactory(LocalSessionFactoryBean.java:677)rn at org.springframework.orm.hibernate3.AbstractSessionFactoryBean.afterPropertiesSet(AbstractSessionFactoryBean.java:211)rn at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1460)rn at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1400)rn ... 46 morern2015-9-19 17:18:58 org.apache.catalina.core.StandardContext listenerStartrn严重: Exception sending context initialized event to listener instance of class com.sxy.tasks.TimerManagerrnorg.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataLimitDao' defined in file [E:\tomcat6036\webapps\sxyerp\WEB-INF\classes\financeBean.xml]: Cannot resolve reference to bean 'sessionFactory' while setting bean property 'sessionFactory'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory' defined in file [E:\tomcat6036\webapps\sxyerp\WEB-INF\classes\applicationContext.xml]: Invocation of init method failed; nested exception is org.hibernate.DuplicateMappingException: Duplicate collection role mapping com.pojos.QNEOrder.passengersrn at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:328)rn at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:106)rn at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1308)rn at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1067)rn at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:511)rn at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:450)rn at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:290)rn at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)rn at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:287)rn at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:189)rn at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:562)rn at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:871)rn at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:423)rn at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:272)rn at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:196)rn rn rnrnrnrn
求解求解
[img=https://img-bbs.csdn.net/upload/201401/03/1388718927_311182.png][/img]rnrnrn这种多个列表的箭头怎么实现呢,选中cell的时候跟着移动,。。 cell.selectedBackgroundView 好像不行,是在didSelectRowAtIndexPath写嘛?新手求助, 可以详细点哦,rnrnrn- (UITableViewCell *)multiTablesView:(MultiTablesView *)multiTablesView level:(NSInteger)level cellForRowAtIndexPath:(NSIndexPath *)indexPath; //level为UITableView层次rnrn- (void)multiTablesView:(MultiTablesView *)multiTablesView level:(NSInteger)level didSelectRowAtIndexPath:(NSIndexPath *)indexPath;
求解 求解。。。
发现WIN7真麻烦,早知道就不换XP了rnrn最近装了WIN7之后,装了SQLServer之后,也装了VS2008 这都不是问题rnrn在新建了一个ASP.NET之后,在ASPX里面用了一个SqlDataSource,然后配置数据源,然后新建连接,然后就是填服务器名了,大神们都懂的。rnrn服务器名 无论写 . 还是 我计算机名 都不行。rnrn关于服务里面TCP/IP 和其他服务我都开了 很是奇怪、rnrn<em>求解</em>
求解求解!!
使用windows搜索工具在磁盘中查找文件时,在给出的被查找文件史允许含有通配符“*”和“?”(其中“*”表示该位置上有0个或多个任意字符,“?”表示该位置上有0个或1个字符),以达到搜索多个文件的目的。搜索的过程就是在已存在的若干文件名中查找出与所给的含有通配符“*”和“?”被查找文件名匹配的所有文件名(设文件名存储在某文本文件中,每行一个文件)。rn rnrn
菜鸟问题~~~~~~~~~~~~~~~~~~求解 求解 求解
小弟想实现一个功能就是:rnrn去指定的目录寻找一个txt文件(这个txt文件每天定时有人给我传),但是时间不确定,我得到文件后对他进行处理,但是由于时间不确定,所以有时在文件还没来的时候,windows的定时作业就启动了处理程序,所以请问各位大侠有没有什么方法能使我修改处理程序,让它隔一段时间就去监测是否存在文件,然后再调用。。rn谢谢了
Linq中where查询
一、LINQ的基本语法包含如下的8个上下文关键字,这些关键字和具体的说明如下: 关键字 说明 from 指定范围变量和数据源 where 根据bool表达式从数据源中筛选数据 select 指定查询结果中的元素所具有的类型或表现形式 group 对查询结果按照键值进行分组(IGrouping) into 提供一个标
LINQ简单总结:from n in ... where ... select 、Any()、All()、Take()、Skip()、 First()、 FirstOrDefault()
LINQ;Language Integrated  Query 命名空间:using System.Linq; static void Main(string[] args) { string[] names = {"RH","AHRH","ABRDH","SREHGS","BXDNT","AEGGA","AEGS","EGESA","A
LINQ,where,customer method
from t in Table1 where Method1(t.Field1)==1 select t int Method1(string data) { //处理data数据,返回int }
linq之where用法.(补充where的别一个用法)
Where 子句的用法 我们除了可以如下方式书写带Where子句的LINQ外: from p in products where p.UnitsInStock > 0 && p.UnitPrice > 3.00M select p; 还可以对数组(所有实现了IEnumerable接口的对象都可以)的实体使用 Where 扩展方法。   把一个查询语句写成多个扩展函数的
迷宫求解迷宫求解迷宫求解迷宫求解迷宫求解迷宫求解迷宫求解
迷宫<em>求解</em>迷宫<em>求解</em>迷宫<em>求解</em>迷宫<em>求解</em>迷宫<em>求解</em>迷宫<em>求解</em>迷宫<em>求解</em>迷宫<em>求解</em>迷宫<em>求解</em>迷宫<em>求解</em>迷宫<em>求解</em>迷宫<em>求解</em>迷宫<em>求解</em>迷宫<em>求解</em>迷宫<em>求解</em>迷宫<em>求解</em>迷宫<em>求解</em>迷宫<em>求解</em>迷宫<em>求解</em>迷宫<em>求解</em>迷宫<em>求解</em>迷宫<em>求解</em>迷宫<em>求解</em>迷宫<em>求解</em>迷宫<em>求解</em>迷宫<em>求解</em>迷宫<em>求解</em>迷宫<em>求解</em>迷宫<em>求解</em>迷宫<em>求解</em>迷宫<em>求解</em>迷宫<em>求解</em>迷宫<em>求解</em>迷宫<em>求解</em>迷宫<em>求解</em>迷宫<em>求解</em>迷宫<em>求解</em>迷宫<em>求解</em>迷宫<em>求解</em>迷宫<em>求解</em>迷宫<em>求解</em>迷宫<em>求解</em>迷宫<em>求解</em>迷宫<em>求解</em>迷宫<em>求解</em>迷宫<em>求解</em>迷宫<em>求解</em>迷宫<em>求解</em>迷宫<em>求解</em>迷宫<em>求解</em>迷宫<em>求解</em>迷宫<em>求解</em>迷宫<em>求解</em>迷宫<em>求解</em>
求解
关于安卓 通过 USB 连接电钢琴,USB+midi文件! 有的留言哦
求解
-
LINQ之where查询
/*****LINQ where查询********/ int[] arr = { 32, 43, 345, 234, 543, 23, 543, 34, 65, 345 }; Console.WriteLine(&quot;所有元素&quot;); foreach (var item in arr) { ...
linq where 多条件查询 异常
var query1 = from pl in sds.Tables.AsEnumerable() where SysType == pl.Field("SysType") && us
LINQ - 在Where條件式中使用in與not in
T-SQL的IN:  Select ProductID, ProductName, CategoryID From dbo.Products   Where not CategoryID in (1, 2) T-SQL的NOT IN:  Select ProductID, ProductName, CategoryID From dbo.Products   Where Category
Linq 的Where in语句
var statusesToFind = new List&amp;lt;int&amp;gt; {1, 2, 3, 4}; var foos = from foo in myEntities.Foos where statusesToFind.Contains(foo.Status) select foo;
Linq where示例
IList lists = DeviceManagerManager.GetDeviceManagerAll();             var listgrid = from v in lists                            where v.PutInStorageTime >= putintimestart && v.PutInStorageTime  
求解???
  &amp;lt;window title=&quot;Test of JavaScript Utilities&quot;&amp;gt; &amp;lt;html onClick='l.value = &quot;onClick &quot;+event.area' onUser='l.value =&quot;onUser &quot; +org.zkoss.lang.Objects.toString(event.data)'&amp;gt;&amp;lt;![C...
LINQ的经典例子-Where,Select、SelectMany、SkipWhile子句中使用数组索引
 Where 子句的用法我们除了可以如下方式书写带Where子句的LINQ外: from p in products where p.UnitsInStock > 0 && p.UnitPrice > 3.00M select p;还可以对数组(所有实现了IEnumerable接口的对象都可以)的实体使用 Where 扩展方法。 把一个查询语句写成多个扩展函数的方式,这其实
Linq 基本用法
Linq查询表达式是Linq中的非常重要的一部分内容,它可以从一个或多个给定的数据源中检索数据,并指定检索结果的数据类型和表现形式 下面我们看看常用的Linq查询表达式 下面查询出符合条件的姓名 其中s是Students中的一个对象 from s in Students where s.id<10 select s.Name 如果查询出的内容
求解!!!!】
有一table:rnrnfname idsrnaa 1,12,23,25,2,41,42rnbb 2,32,12rncc 32,1rnrnids字段的值是由几个id组成,且用逗号分开rn请问如何筛选出当 ids 含有 2 的行呀??rnrn
求解。。
#include rnrnint main()rnrn int x;char grade;rn scanf("%d",&x);rn if(x100)rn printf("error\n");rn elsern rn switch(x/10);rn rn case 10:grade='A';break;rn case 9:grade='B';break;rn case 8:grade='C';break;rn case 7:grade='D';break;rn default:grade='E';rn rn printf("%c\n",grade);rn rn return 0;rn
求解??
小弟的SQL不是很通。遇到下面的问题只能用游标,求各位高手在不用游标的情况解决以下的问题。谢谢rn表Arn货号------类别-------上级类别--------销售额rn001-------A-----------空------------1000rn001-------A1-----------A------------700rn001-------A2-----------A------------300rn002-------B-----------空------------3100rn002-------B2-----------B------------500rn002-------B1-----------B------------100rnrnrn得到的结果应该是rn001----A-----空------2000rn001----A1----A------------700rn001----A2----A------------300rn002----B---- 空------------3700rn002----B2----B------------500rn002----B1----B------------100rnrnrnrn求最简单的方法
求解...
看书没看明白C#中属性和索引这俩块(基本上什么都没看明白),<em>求解</em>...
求解!!!!
void printStars(int a)rnwhile(a>0)rnprintf("*");rnprintStars(a-1);rnrnrnrnrnrn如何改变while,就是这个地方用别的代替,不用任何形式的循环rn而是通过查看其参数。如果参数值为非正数,就直接返回。
求解.
我写了个页面...用repter与checkbox组合.绑定了部门对应的人员.rnrn 接下来是想获取选定的值.(值的获取我写好了..)rnrn 碰到的问题是我这些值无法在button onclick的事件中传递出去..!~我把代码贴出来..麻烦大家给分析分析..!~谢谢!rn[code=C#] public void chos (RepeaterItemEventArgs e)rn rn //string[] person = ;rn ArrayList arr = new ArrayList();//定义数组,存放员工工号rn CheckBoxList ck = e.Item.FindControl("ch_renyuan") as CheckBoxList;//从repter中获得checkboxList的IDrn for (int i=0; i < ck.Items.Count; i++)//循环获得checkboxlist被选中的值rn rn if (ck.Items.Count > 0)//判断是否有选择rn rn if (ck.Items[i].Selected == true)//判断哪个被选择rn rn // person += ck.Items[i].Value.ToString();rn arr.Add(ck.Items[i].Value);rn rn rn elsern rn Response.Write(" ");rn rn [/code]
求解!
int InitQueue(LinkQueue *Q)rnrnQ->front=(LinkQueueNode*)malloc(sizeof(LinkQueueNode));rnif(Q->front!=NULL)rnrn Q->rear=Q->front;rn Q->front->next=NULL;rn return(True);rnrnelsern return(False);rnrnrn这段代码的含义是不是创建一个结点,如果创建成功了,头指针和尾指针都指向这个结点?
求解,,,,,
解释段代码:rnstring8rn 0x15 size(1字节) size字节rnstring16rn 0x25 size(2字节) size字节rn@Overridernpublic void OnVisitString(String strValue) rnif(strValue.length() < (1 << 8))rndestBuf[nOffset++] = 0x15;rndestBuf[nOffset++] = (byte) strValue.length();rnelse if(strValue.length() < (1 << 16))rndestBuf[nOffset++] = 0x25;rnMsgCodec.WriteLEShort((short) strValue.length(), destBuf, nOffset);rnnOffset += Short.SIZE/Byte.SIZE;rnelse rndestBuf[nOffset++] = 0x35;rnMsgCodec.WriteLEInteger(strValue.length(), destBuf, nOffset);rnnOffset += Integer.SIZE/Byte.SIZE;rnrnnOffset += MsgCodec.UnicodeToUTF8(strValue, destBuf, nOffset);rn
求解~~
win7系统下,,,新建用户后,在新建的用户上运行软件或者进行其他操作,会对主用户产生影响么?
求解~
个人现在弄了C#不到1年。。很多东西不是很明白。。rn比如说全局变量和局部变量效率方面有多少差异。。一个全局=几个局部rn还有一些类似的问题。。rn想问下各位大大。。我想知道这些东西该学学什么。。看看什么书
求解!!!!!!
Web1.Document.Forms.pageno.value = 11rn其中web1是webbrowse控件的名字rn就是说我的这个pageno是一个form的元素名称,但是我现在要用变量给它的名字赋值,用变量来代替它.rnrnWeb1.Document.Forms.变量名.value = 11 这种写法显然是错的,请问该如何写呢?rn
求解!!!
我想实现非模式对话框,可是不知道哪里设置出错,不行,哪位高手能够指点,指点么?rn//重要RESOURCE代码rn/////////////////////////////////////////////////////////////////////////////rn//rn// Menurn//rnrnIDR_MENU MENU DISCARDABLE rnBEGINrn POPUP "&Dialog"rn BEGINrn MENUITEM "Dialog &1\tF2", IDM_DIALOG1rn MENUITEM "Dialog &2\tF3", IDM_DIALOG2rn MENUITEM "E&xit\tCtrl+X", IDM_EXITrn ENDrn MENUITEM "&Help", IDM_HELPrnENDrnrnrn/////////////////////////////////////////////////////////////////////////////rn//rn// Dialogrn//rnrnIDD_DIALOG DIALOG DISCARDABLE 0, 0, 171, 102rnSTYLE DS_LOCALEDIT | DS_MODALFRAME | WS_POPUP | WS_VISIBLE | WS_CAPTION | rn WS_SYSMENUrnCAPTION "Test Dialog Box"rnFONT 10, "System"rnBEGINrn LISTBOX ID_LIST,7,7,57,28,LBS_SORT | LBS_NOINTEGRALHEIGHT | rn WS_VSCROLL | WS_TABSTOPrn PUSHBUTTON "Select Fruit",IDD_SELFRUIT,7,41,50,14rn EDITTEXT ID_EB1,93,15,71,14,ES_AUTOHSCROLLrn PUSHBUTTON "Edit OK",IDOK,114,41,50,14rn PUSHBUTTON "Red",IDD_RED,61,59,50,14rn PUSHBUTTON "Green",IDD_GREEN,114,81,50,14rn PUSHBUTTON "Cancel",IDCANCEL,7,81,50,14rnENDrnrn/////////////////////////////////////////////////////////////////////////////rn//rn// Acceleratorrn//rnrnIDR_ACCELERATOR ACCELERATORS DISCARDABLE rnBEGINrn VK_F1, IDM_HELP, VIRTKEY, NOINVERTrn VK_F2, IDM_DIALOG1, VIRTKEY, NOINVERTrn VK_F3, IDM_DIALOG2, VIRTKEY, NOINVERTrn "X", IDM_EXIT, VIRTKEY, CONTROL, NOINVERTrnENDrnrn//程序代码rn#include rn#include rn#include rn#include "Resource.h"rnrnLRESULT CALLBACK WindowFunc(HWND, UINT, WPARAM, LPARAM);rnBOOL CALLBACK DialogFunc(HWND, UINT, WPARAM, LPARAM);rnrnchar szWinName[ ] = "MyWin"; /* name of window class */rnHINSTANCE hInst;rnHWND hDlg; /* dialog box handle */rnrnint WINAPI WinMain(HINSTANCE hThisInst, HINSTANCE hPrevInst,rn LPSTR lpszArgs, int nWinMode)rnrn HWND hwnd;rn MSG msg;rn WNDCLASSEX wcl;rn HACCEL hAccel;rn rn /* Define a window class. */rn wcl.cbSize = sizeof(WNDCLASSEX);rn wcl.hInstance = hThisInst; /* handle to this instance */rn wcl.lpszClassName = szWinName; /* window class name */rn wcl.lpfnWndProc = WindowFunc; /* window function */rn wcl.style = 0; /* default style */rn wcl.hIcon = LoadIcon(NULL, IDI_APPLICATION); /* standard icon */rn wcl.hIconSm = LoadIcon(NULL, IDI_WINLOGO); /* small icon */rn wcl.hCursor = LoadCursor(NULL, IDC_ARROW); /* cursor style */rn wcl.lpszMenuName = MAKEINTRESOURCE(IDR_MENU); /* main menu */rn wcl.cbClsExtra = 0; /* no extra */rn wcl.cbWndExtra = 0; /* information needed */rn rn /* Make the window white. */rn wcl.hbrBackground = (HBRUSH) GetStockObject(WHITE_BRUSH);rn rn /* Register the window class.*/rn if(!RegisterClassEx(&wcl)) return 0;rnrn /* Now that a window class has been registered, a windowrn can be created. */rn hwnd = CreateWindow(rn szWinName, /* name of window class */rn "A Modeless Dialog Box", /* title */rn WS_OVERLAPPEDWINDOW, /* window style - normal */rn CW_USEDEFAULT, /* X coordinate - let Wlndows decide */rn CW_USEDEFAULT, /* Y coordinate - let Wlndows decide */rn CW_USEDEFAULT, /* width - let Windows decide */rn CW_USEDEFAULT, /* height - let Windows decide */rn HWND_DESKTOP, /* no parent window */rn NULL, /* no override of class menu */rn hThisInst, /* handle of this instance of the program */rn NULL /* no additional arguments */rn );rn hInst = hThisInst; /* save the current instance handle */rn /* Load accelerators. */rn hAccel = LoadAccelerators(hThisInst, IDR_ACCELERATOR);rnrn /* Display the window. */rn ShowWindow(hwnd, nWinMode);rn UpdateWindow(hwnd);rnrn /* Create the message loop. */rn while(GetMessage(&msg, NULL, 0, 0))rn rn if(!IsDialogMessage(hDlg, &msg)) rn rn /* not for dialog box */rn if(!TranslateAccelerator(hwnd, hAccel, &msg)) rn rn TranslateMessage(&msg); /* translate keyboard messages */rn DispatchMessage(&msg); /* return control to Windows 98 */rn rn rn rn return msg.wParam;rnrnrn/* This function is called by Windows 98 and is passedrn messages from the message queue.rn */rnrnLRESULT CALLBACK WindowFunc(HWND hwnd, UINT message,rn WPARAM wParam, LPARAM lParam)rnrn int response;rn switch(message) rn rn case WM_COMMAND:rn switch(LOWORD(wParam)) rn rn case IDM_DIALOG1: /* this creates modeless dialog box */rn hDlg = CreateDialog(hInst, MAKEINTRESOURCE(IDD_DIALOG), hwnd, (DLGPROC)rn DialogFunc);rn break;rn case IDM_DIALOG2:rn MessageBox(hwnd, "Dialog Not Implemented","Dialog 2",rn MB_OK);rn break;rn case IDM_EXIT:rn response = MessageBox(hwnd, "Quit the Program?",rn "Exit",MB_YESNO);rn if(response == IDYES) PostQuitMessage(0);rn break;rn case IDM_HELP:rn MessageBox(hwnd, "Not Implemented", "Help", MB_OK);rn break;rn rn break;rn case WM_DESTROY: /* terminate the program */rn PostQuitMessage(0);rn break;rn default:rn /* Let Windows 98 process any messages not specified inrn the preceding switch statement. */rn return DefWindowProc(hwnd, message, wParam, lParam);rn rn return 0;rnrnrn/* A simple dialog function. */rnBOOL CALLBACK DialogFunc(HWND hdwnd, UINT message,rn WPARAM wParam, LPARAM lParam)rnrn long i;rn char str[80];rn switch(message) rn rn case WM_COMMAND:rn switch(LOWORD(wParam)) rn rn case IDOK: /* edit box OK button selected */rn /* display contents of the edit box */rn GetDlgItemText(hdwnd,ID_EB1,str,80);rn MessageBox(hdwnd, str, "Edit Box Contains", MB_OK);rn return 1;rn case IDCANCEL:rn DestroyWindow(hdwnd);rn return 1;rn case IDD_RED:rn MessageBox(hdwnd, "You Picked Red", "RED", MB_OK);rn return 1;rn case IDD_GREEN:rn MessageBox(hdwnd, "You Picked Green", "GREEN", MB_OK);rn return 1;rn case ID_LIST: /* process a list box LBN_DBLCLK */rn // see if user made a selectionrn if(HIWORD(wParam)==LBN_DBLCLK) rn rn i = SendDlgItemMessage(hdwnd, ID_LIST,rn LB_GETCURSEL, 0, 0); // get indexrn sprintf(str, "Index in list is: %d", i);rn rn MessageBox(hdwnd, str, "Selection Made", MB_OK);rn rn return 1;rn case IDD_SELFRUIT: /* Select Fruit has been pressed */rn i = SendDlgItemMessage(hdwnd, ID_LIST,rn LB_GETCURSEL, 0, 0); // get indexrn if(i != LB_ERR) sprintf(str, "Index in list is: %d", i);rn else sprintf(str, "No Fruit Selected");rn MessageBox(hdwnd, str, "Selection Made", MB_OK);rn return 1;rn rn break;rn case WM_INITDIALOG: // initialize list boxrn SendDlgItemMessage(hdwnd, ID_LIST,rn LB_ADDSTRING, 0, (LPARAM)"Apple");rn SendDlgItemMessage(hdwnd, ID_LIST,rn LB_ADDSTRING, 0, (LPARAM)"Orange");rn SendDlgItemMessage(hdwnd, ID_LIST,rn LB_ADDSTRING, 0, (LPARAM)"Pear");rn SendDlgItemMessage(hdwnd, ID_LIST,rn LB_ADDSTRING, 0, (LPARAM)"Grape");rn return 1;rn rn return 0;rnrn
求解!!!!!
fwrite(&stud,sizeof(ST),1,fp); fread(&stud,sizeof(ST),1,fp);可以写读数据,那么要删掉文件里的一个结构体数据怎么删,<em>求解</em>!!!!!
求解
我想实现这样一个功能:rn[img=https://img-bbs.csdn.net/upload/201308/28/1377676056_359243.jpg][/img]rn比如:当在输入框中输入2时,就会出现[img=https://img-bbs.csdn.net/upload/201308/28/1377676150_113086.jpg][/img]rn问题来了,我是用js文件中先获取一个空白的div标签,然后调用了append()方法,将第一个模块的代码放入括号内,但是这样的话每个模块中控件的name全重了,致使原来radio标签上的change()方法失效,而且,我不知道怎么才能将这几个模块放到一个List中然后传到后台的Action中,愁煞了,想问问大神
ZoomImage(for jquery 1[1].3.2)1下载
上传形象照之类的截图,都可以用它 上传形象照之类的截图,都可以用它 相关下载链接:[url=//download.csdn.net/download/tjava_net/2693270?utm_source=bbsseo]//download.csdn.net/download/tjava_net/2693270?utm_source=bbsseo[/url]
百度谷歌引擎优化seo学习资料下载
一些SEO学习资料的汇总,有需要的就拿去吧。 相关下载链接:[url=//download.csdn.net/download/monkey252212333/3136985?utm_source=bbsseo]//download.csdn.net/download/monkey252212333/3136985?utm_source=bbsseo[/url]
进程读书报告下载
现代操作系统最基础的任务就是进程管理。操作系统必须为进程分配资源,使进程间可以交换信息,保护各个进程的资源不被其他进程占有,并且使进程可以同步。为了达到这些要求,操作系统必须为每一个进程维护一个数据结构,这个数据结构描述进程的状态和资源所以权,这样才能让操作系统进行进程控制。 相关下载链接:[url=//download.csdn.net/download/xiaoxia0409/5323200?utm_source=bbsseo]//download.csdn.net/download/xiaoxia0409/5323200?utm_source=bbsseo[/url]
相关热词 c# gdi 占用内存 c#中遍历字典 c#控制台模拟dos c# 斜率 最小二乘法 c#进程延迟 c# mysql完整项目 c# grid 总行数 c# web浏览器插件 c# xml 生成xsd c# 操作sql视图
我们是很有底线的