标签: net

.NET开源，不仅支持跨平台开发，重要的是跨平台运行，可以在Windows以外的其他平台进行开发，同时微软承诺将对这些平台提供.NET应用的运行环境及框架支持，这使得java虚拟机的优势荡然无存！ .NET 开源，集成 Clang 和 LLVM 并且自带 Android 模拟器，这意味着 Visual Studio 这个当下最好没有之一的 IDE 正式支持编写 Android 和 iOS 程序。 .NET 本次开源的内容涉及 .NET Framework Libraries、.NET Core Framework Libraries 和 RyuJit VM，允许开发者编写运行于 Mac OS X 和 Linux 的 .NET 程序。此外，微软开始像个人开发者提供免费的 Visual Studio Community 2013，相当于原 Visual Studio Professional 免费向个人提供。开源在 MIT 协议下进行，并提供开源保证（patent promis）。   没错，当这个消息在Connect(); 大会上宣布后，全世界开发者的圈子已经炸开了锅！ 那么.NET开源究竟意味着什么？为什么这一消息对于开发者犹如重磅**？它对微软及业界将产生什么影响？带着三个问题让我们先从程序员世界的那些破事儿说起。   ◆ java与.NET两大阵营 计算机语言的发展经历了机器语言、汇编语言、高级语言以及C、C++、java等翘楚在历史上闪耀过后，聪明的灵长类动物人类将编程语言做成了各种简便易学易用的开发工具和开发平台，利用这些工具平台你只须像搭建高乐积木般就能码出自己想要的东西，当然你还得会削积木（掌握语言）。 后来经过时间演化形成了两大开发阵营——java和.NET，简单说前者是跨平台的开发工具，可以在不同操作系统上进行开发、运行、维护；而后者是跨语言的开发平台，允许使用多种编程语言结合其工具进行开发，但开发过程和应用程序的运行只能在Windows平台上实现。两者各有优劣，一目了然。 尽管.NET倚恃他爹微软以实力雄厚、功能强大著称，但自互联网时代特别是移动互联时代微软固守Windows平台的局限性，其自然被灵活机动跨平台的java抢尽风头。然而纳德拉显然不是吃素的，.NET开源了，不仅支持跨平台开发，重要的是跨平台运行，这使得java虚拟机的优势荡然无存。 ◆ 被逼急的纳德拉：.NET开源对java影响深远 历史证明，开源与商业软件就像两股相互抑制的力量，它们是一种此消彼长的关系，但绝不会完全吞并另一方。 过去十几年，java顺应互联网发展趋势以其卓越的通用性、安全性、平台可移植性赢得了全球开发者的青睐，并积累起庞大的簇拥人群。然而却鲜有人知道java起步之初就受到了来自微软与Adobe的双向绞杀而一度濒危，艰难存活下来之后，其真正的发家则在于移动时代的到来，安卓平台给了它广阔空间和涅槃之力。 如今，java在服务器端和手持设备领域已如日中天。 谷歌公司手持java利器，号召开源势力对微软穷追猛打的这些年真的把微软逼急了。 微软新帅纳德拉上任后的三把火，让谷歌明白了他们正在挑衅一只受了轻伤的狮子，而这只狮子正在重振雄风。事实证明微软在多年之前就已拥抱开源，参与Linux内核贡献并成立开放技术子公司，而今年早些时候对Roslyn编译器的开源亦是其.NET开源大计的前奏。 甚至一些开源社区的领袖人物也表示不再将微软视为“敌人”，同时他们认为未来.NET与java将互不干涉地共存。 ◆ 纳德拉的计谋 我们看到纳德拉上任后实施的一系列举措让微软在潜移默化中得到改变，“移动为先、云为先”的两个“先”字在这段日子里得到了明确的执行。从Office跨平台免费到VS跨平台免费以及VS Emulator for Android的发放，微软在跨平台上大做文章并拉拢个人消费者和开发者，表面上似乎丢车保帅采取Windows平台让利策略，实则在暗地里下一盘很大的棋。 众所周知，苹果依赖品牌溢价而大卖硬件，其封闭的软件生态为诸多开发者所诟病，结果就是导致了安卓的野蛮生长。 纳德拉似乎看到了谷歌的弱点：尽管安卓系统在智能移动市场垄断地位已现，但业内一股安卓“去谷歌化”的暗流却在蔓延滋生，也就是说谷歌正逐渐丧失对安卓的控制，当年ATT公司放任UNIX变种发展导致BSD的反超和一枝独秀就是最好的例证。 纳德拉的新策略致力于将微软的生态核心从Windows转移至Azure云，.NET平台的开放有利于实现微软新生态向安卓平台的渗透，助长安卓系统继续野蛮生长，加速其脱离谷歌的控制。 在未来，我们或将看到大量优质的.NET应用运行在安卓和iOS平台上，而这一切的背后都将伴随着Azure云的影子。 不久前，微软市值升至4089亿美元位居全球第二并超过谷歌公司。我们看到微软正逐渐走出PC时代的思维困局，朝着即将到来的下一波移动浪潮布局着有利战略。 不得不说，继施密特、库克之后，纳德拉是一个不简单的硅谷经理人。那个老鲍用充满激情大嗓门喊着”Web Developers! Web Developers! Web Developers!”的时代已成为过去，如今的微软则让人看到了盖茨时代的狡黠。   --整理自网易新闻。

When I'm driving back and forth between my home and my office, I usually tune in to the National Public Radio (NPR) . One of the topics that's been bouncing around for the last few months is that of "net neutrality" (or lack thereof).   The idea behind net neutrality is that everyone's data on the Internet should be treated equally. Specifically, Internet Service Providers (ISPs) and governments should not discriminate or charge differently based on things like the user, content, site, platform, application, type of attached equipment, and modes of communication.   There are, of course, both proponents and opponents to this concept. The problem is that every time I hear someone talk about it, what they say seems to make sense. For example, a speaker the other day made the point that if someone's vital signs are being monitored remotely in a life or death situation, then you really wouldn't mind if they paid more in order to get guaranteed quality of service (QoS), even if that slightly impacted your online movie viewing pleasure.   The end result is that I no longer have a clue which side I'm on. My head hurts. All of which brings me to the fact that someone called Vi Hart is pretty definite as to which side she's on. I just saw an amazingly clever video presentation that explains net neutrality -- and a whole lot more -- in terms that even I can understand.       According to her website , "Vi" usually rhymes with "Hi," but the non-English pronunciation is often like "Vee," and she will also answer to "Six" and "Not-Emacs."   One thing I can safely say is that Vi has certainly given me a lot to think about. I see that she also has some other topics and videos on her website. I can feel myself being drawn to the one titled Happy Pi Day? NOPE as we speak.   In the meantime, what's your take on net neutrality? Should people and companies be allowed to pay more to get a better QoS? Should they be forced to pay more? Should ISPs be allowed to charge different customers differently in general? How about giving their partners' companies preferential service and/or rates over those partners' competitor companies?

I like to listen to the National Public Radio (NPR) when I'm driving back and forth between my home and my office. One of the topics that's been bouncing around for the last few months is that of "net neutrality" (or lack thereof).   The idea behind net neutrality is that everyone's data on the Internet should be treated equally. Specifically, Internet Service Providers (ISPs) and governments should not discriminate or charge differently based on things like the user, content, site, platform, application, type of attached equipment, and modes of communication.   There are, of course, both proponents and opponents to this concept. The problem is that every time I hear someone talk about it, what they say seems to make sense. For example, a speaker the other day made the point that if someone's vital signs are being monitored remotely in a life or death situation, then you really wouldn't mind if they paid more in order to get guaranteed quality of service (QoS), even if that slightly impacted your online movie viewing pleasure.   The end result is that I no longer have a clue which side I'm on. My head hurts. All of which brings me to the fact that someone called Vi Hart is pretty definite as to which side she's on. I just saw an amazingly clever video presentation that explains net neutrality -- and a whole lot more -- in terms that even I can understand.     According to her website , "Vi" usually rhymes with "Hi," but the non-English pronunciation is often like "Vee," and she will also answer to "Six" and "Not-Emacs."   One thing I can safely say is that Vi has certainly given me a lot to think about. I see that she also has some other topics and videos on her website. I can feel myself being drawn to the one titled Happy Pi Day? NOPE as we speak.   In the meantime, what's your take on net neutrality? Should people and companies be allowed to pay more to get a better QoS? Should they be forced to pay more? Should ISPs be allowed to charge different customers differently in general? How about giving their partners' companies preferential service and/or rates over those partners' competitor companies?

  许多应用程序，如VC2008、AutoCAD2008等安装时如果检测到系统中的.NET Framework版本低，就要重新安装高版本的，例如VC2008第一步就要安装.NET Framework3.5，如果安装.NET Framework失败，VC2008也无法继续安装下去。 有时，安装.NET Framework3.5时会出现：“ Microsoft .NET Framework 4.0 安装时发生严重错误 ”导致安装失败，即使先卸载低版本的.NET Framework，甚至使用Microsoft的NET Framework自动清理工具cleanup_tool.exe完全清理干净也不行。出现这种情况 一般是使用Ghost盘安装Windows XP时将IE进行**安装，导致用户权限不够引起的。 解决办法是修改用户权限后再安装，下面以XP系统安装.NET Framework4.0为例： 第一步： 1.开始—运行—执行cmd—在DOS窗口中执行net stop wuauserv，停止该服务（Windows系统自动更新的服务），以便操作Windows系统目录下的SoftwareDistribution文件夹。 2.打开Windows XP系统安装目录，一般为C:\Windows。 3.在打开的窗口中找到文件夹SoftwareDistribution，把它重命名为SDold，做个备份。 4.开始—运行—执行cmd—在DOS窗口中输入net start wuauserv，重新启动该服务,会重建一个空的SoftwareDistribution文件夹。 第二步： 1.开始—运行—执行regedit，打开注册表编辑器 2.找到注册表HKEY_LOCAL_MACHINE\SOFWARE\Microsoft\Internet Explorer下的MAIN子键，点击main后，在菜单中点击“编辑”–“权限”，点击后再用户权限窗口中就会出现“允许完全控制”等，勾上即可。 第三步： 从Microsoft网站上（http://www.microsoft.com/zh-cn/download/details.aspx?id=17718）下载、安装 .NET Framework4.0(文件名：dotNetFx40_Full_x86_x64.exe)， 参考文章及清理工具下载：http://support.microsoft.com/kb/2497934/zh-cn)。  

之前画了一个板子，PCB基本已经完成了。之前用的RAM有几根地址线没有用到，现在想加上。修改完之后，编译没有问题，但是在导入的时候出现Unmatched net ，弹出这个窗口就没办法往下进行了。在网上搜了一下，很多人都说可以把PCB删掉重新导入就没有问题了，但是如果我的PCB基本都画完了，总不能都删了再重新画吧。 再Altium designer的HELP里搜了一下，发现是因为原理图和PCB中有些net和component对应不上。出现这个问题。 解决方法： 删除PCB中所有的net。再PCB中，DESIGN--NETLIST---EDIT NET,选中所有的net后删掉就可以了。