在给ImageBrush绑定动态图片是会报以下错误. Error    4    The provided DependencyObject is not a context for this Freezable. Parameter name: context   MSDN 中是怎么说的呢? A Freezable is a special type of object that has two states: unfrozen and frozen. When unfrozen, a Fre…

[自己的解决方案]数据量大时,可显著提升用户使用体验! 1.Root ListView 参考官方的E1554 点击导航菜单后首先跳出查询条件设置窗体进行设置 可设置查询方案或查询方案的查询条件,排序字段.排序方向,是否只查询前1000条. 2.LookupListView 可设置 TopReturnedObjects = 600 3.Code:http://pan.baidu.com/s/1o8MVKkq  密码:qfmv [官方方案] https://www.devexpress.com/Su…

COMPUTER ORGANIZATION AND ARCHITECTURE DESIGNING FOR PERFORMANCE NINTH EDITION In this section, we look at some of the general characteristics of and the motivation for a reduced instruction set architecture. Specific examples will be seen later in t…

Computer Systems A Programmer's Perspective Second Edition In this chapter, we take a brief look at the design of processor hardware. We study the way a hardware system can execute the instructions of a particular ISA. This view will give you a bette…

Pooled Threads Improve Scalability With New Thread Pool APIs Robert Saccone Portions of this article are based on a prerelease version of Windows Server 2008. Details contained herein are subject to change. Code download available at: VistaThreadPool…

/** Let inheritance help with memory efficiency */ function SignalFire(ID, startingLogs){ this.fireID = ID; this.logsLeft = startingLogs; } SignalFire.prototype = { addLogs: function(numLogs){ this.logsLeft += numLogs; } lightFire: function(){ alert(…

Use Prerender to improve AngularJS SEO Nuget Package of ASP.NET MVC HttpModule for prerender.io: Install-Package DotNetOpen.PrerenderModule Source Code of ASP.NET MVC and ASP.NET Core Middlewares for prerender.io:  https://github.com/dingyuliang/prer…

在官方的swiper(滑块视图容器)中demo代码,运行时会出现Now you can provide attr "wx:key" for a "wx:for" to improve performance.警告 那是因为在<block wx:for-items="{{imgUrls}}">中不存在wx:key="imgUrls"所以才导致报了个警告. 写成<block wx:for="{{imgU…

Now you can provide attr "wx:key" for a "wx:for" to improve performance为警告,不处理不影响程序运行. 消除警告只需要在"wx:for"后面添加wx:key="xxx"就行了 wx:key="xxx"的值取决于项目 wx:key 的值以两种形式提供 1.  字符串,代表在 for 循环的 array 中 item 的某个 property…

Now you can provide attr "wx:key" for a "wx:for" to improve performance 是一个关于性能优化方面的提示. 不处理不影响程序运行. 在wx:for后面添加wx:key="key" 可消除警告. wx:key如果列表中项目的位置会动态改变或者有新的项目添加到列表中,并且希望列表中的项目保持自己的特征和状态(如 <input/>中的输入内容,<switch/>…