How to resize or create a thumbnail image from file stream on UWP

最近在搞Ocr相关的windows universal app, 用到了一些图像处理相关的知识. 涉及到了BitmapDecoder/BitmapEncoder/IRandomAccessStream等类,下面总结了IRandomAccessStream的一些扩展方法,以后还会慢慢加上其他常用的. public static class RandomAccessStreamExtension { /// <summary> /// Retrieves an adjusted thumbnail…

Create Shortcut to Get Jar File Meta Information

You have to get meta information of cobertura.jar with command "unzip -q -c cobertura.jar META-INF/MANIFEST.MF". It's too long to write so we gonna create a shortcut "getmeta" for this command. Then we can use "getmeta cobertura&q…

CabArc to create or extract a cab file

CabArc n D:\test.cab D:\output\*.* CabArc x D:\test.cab -r -p D:\output\*.*…

create a large size empty file to measure transfer speed

OS : Windows open cmd fsutil file createnew file_name 1073741824 // 1GB fsutil file createnew file_name 1048576 // 1MB fsutil file createnew file_name 1024 // 1KB fsutil file createnew file_name 1 // 1B Reference: https://www.foolegg.com/how-to-creat…

Stream 基础和常用

来源 : http://www.cnblogs.com/jimmyzheng/archive/2012/03/17/2402814.html 系列目前只作为个人参考. 微软的 stream 结构老大是 Stream(抽象类) -> TextReader(抽象类) -> StreamReader(实体类) -> MemoryStream(实体类),FileStream...等等第4层比较具体了,比较是针对性的类了 basic : 1 bit ( 1个2进制 )8 bit = 1 byte…

Windows下Thumbnail的开发总结

一.引言 Windows Thumbnail Handler是Windows平台下用来为关联的文件类型提供内容预览图的一套COM接口.通过实现Thumbnail相关的COM接口,就可以为为自定义的文件格式提供内容预览图.如下图所示: Thumbnail handler以COM组件的形式注册使用.因此,如果我们想给自己的文件格式开发一个Thumbnail Handler以提供内容预览图,要以COM组件的开发方式进行开发.本人在之前并没有相关的COM开发经验,对于COM组件相关的概念.线程模型及原理…

How to Resize a Datafile (文档 ID 1029252.6)

APPLIES TO: Oracle Database - Enterprise Edition - Version 9.2.0.1 and laterInformation in this document applies to any platform.Checked for relevance on 17 April 2012 PURPOSE This note will discuss resizing of Oracle datafiles (larger or smaller) SC…

How To Create/Extend Swap Partition In Linux Using LVM

https://www.2daygeek.com/how-to-create-extend-swap-partition-in-linux-using-lvm/ BY RAMYA NUVVULA · PUBLISHED : MARCH 28, 2018 || LAST UPDATED: MARCH 28, 2018 We are using LVM for flexible volume management so, why can’t we use LVM for swap space?…

create和grant配合使用，对Mysql进行创建用户和对用户授权

1.首先创建用户username以及密码passwd,授权主机localhost. create user ‘username’@'localhost' identified by 'passwd' 创建了用户后,如果不对用户进行授权的话,则此用户只是对test库具有所有的权限,对于其他的所有库都没有权限. 此时这个用户的状态应该是这样的: +-----------------------------------------------------------------------------…

Git – fatal: Unable to create ‘/.git/index.lock’: File exists错误解决办法

有时候在提交的时候,中间提交出错,导致有文件被lock,所以会报下面的错误: fatal: Unable to create ‘/msg/.git/index.lock’: File exists. If no other git process is currently running, this probably means a git process crashed in this repository earlier. Make sure no other git process is…

linux下安装多个mysql实例（摘自国外：How to create multiple mysql instance in CentOS 6.4 and Red Hat 6.4)

How to create multiple mysql instance in CentOS 6.4 and Red Hat 6.4 from:http://sharadchhetri.com/2013/12/02/create-multiple-mysql-instance-centos-6-4-red-hat-6-4/ December 2, 2013 by sharad chhetri 6 Comments In this tutorial we will learn about how…

RMAN restore fails with ORA-01180: can not create datafile 1

最近在验证.测试备份有效性时,遇到了"ORA-01180: can not create datafile 1"这个错误,顺便结合metalink的官方文档"RMAN restore fails with ORA-01180: can not create datafile 1 (文档 ID 1265151.1)"里面的内容做一个学习.归纳.总结,顺便加深一下理解. creating datafile fno=1 name=/u01/oradata/SCM2/s…

c#创建文件( File.Create() )后对文件写操作出错的分析

在C#中,使用system.IO.File.Create()创建完一个文件之后,如果需要对这个文件进行写操作,会出现错误,提示你“这个文件正在被使用”. 原因是System.IO.File.Create()返回的是一个FileStream,这个需要关闭,才能对其创建的文件进行写操作.有两种方法: 1. 直接关闭,像这样:System.IO.File.Create("the path of the file").Close(); 2. 使用using自动关闭: using(System.…

How to Create a Framework for iOS[RE]

In the previous tutorial, you learned how to create a reusable knob control. However, it might not be obvious how to make it easy for other developers to reuse it. One way to share it would be to provide the source code files directly. However, this…

Create Windows Server 2008 cluster from the command line

How to create a Windows Server 2008 cluster from the command line? Creating a cluster in Server 2008 using the cluster.exe command follows essentially the same process as creating a cluster by using the Microsoft Management Console (MMC) Failover Clu…

RMAN restore fails with ORA-01180: can not create datafile 1 (文档 ID 1265151.1)

http://blog.itpub.net/26655292/viewspace-2131269/ ########Q&A issue1:ORA-01180: can not create datafile 1ORA-01110: data file 1: '/u01/system01.dbf' solution:rman target / catalog rman11g/rman11g@cat11g ########## [root@SsevendbS01 rman]# su - oracle…

#2 create and populate a database && realistic and practical applications

The Chapter3 & Chapter4 of this book tells you how to create a realistic app on the web through the lab. That is really amazing when you finished yourself. I will show you how to make it as follows. FIRST OF ALL, we need a plan of how to make an appl…

Write Custom Java to Create LZO Files

https://cwiki.apache.org/confluence/display/Hive/LanguageManual+LZO LanguageManual LZO Skip to end of metadata Created by Lefty Leverenz, last modified on Sep 19, 2017 Go to start of metadata LZO Compression LZO Compression General LZO Concep…

【转】Create Hello-JNI with Android Studio

[转]Create Hello-JNI with Android Studio From:https://codelabs.developers.google.com/codelabs/android-studio-jni/index.html?index=..%2F..%2Findex#4 访问需要FQ. 没有翻译成中文是因为图片很详细,看不懂英文,根据图片一步一步也能完成.另外开发人员应该具备阅读英文技术博客的能力. 1. Overview In this codelab, you'll l…

[NPM] Create a new project using the npm init <initializer> command

Historically, the npm init command was solely use to create a new package.json file. However, as of npm version 6.1, you can now use a new feature of npm init called the . The initializer you provide will determine how your new application will be bu…

[NPM] Create a node script to replace a complex npm script

In this lesson we will look at pulling out complex npm script logic into an external JavaScript file. Instead of writing bash scripts you can leverage your JavaScript abilities to automate your build process. We’ll use some helper node modules such a…

Deepin Create/Delete Folder refresh

Did u have a problem whth the deepin file manager,Everthime I create/delete a Folder of File i have to refresh. When u right click->new Folder ->nothing happens ->then refresh->it is visble like this video apt-cache show dde-file-manager sudo…

[lean scala]|How to create a SBT project with Intellij IDEA

this article show you how to create a SBT project with IDEA. prerequisite: 1.JDK8 2.Scala 2.11.8 3.Intellij IDEA 2016.3 1.create a new project from: File>New>Project…

File.Create(path)未关闭遇到的一点点问题

本人老菜鸟一枚,不是因为偶是菜鸟中的老手,而是偶是老了但是还是很菜的鸟╮(╯▽╰)╭,不过打今儿起偶想要腾飞…… 今天写文本文件编辑类时遇到一个小问题,下面先将问题描述一下: 1.写文本文件时都会习惯性的判断一下文件是否存在,如果不存在就创建一个出来,也就是下面的代码 if (!File.Exists(logPath)) { File.Create(logPath); } 看起来似乎没什么问题,但是很不凑巧的,问题就是来了,下面几种写文本的方式,在第一次建立文本文件的时候数据都写不进去. Fil…

Node.js NPM Tutorial: Create, Publish, Extend & Manage

A module in Node.js is a logical encapsulation of code in a single unit. It's always a good programming practice to always segregate code in such a way that makes it more manageable and maintainable for future purposes. That's where modules in Node.j…

Walkthrough: Create and use your own Dynamic Link Library (C++)

参考网站:https://docs.microsoft.com/en-us/cpp/build/walkthrough-creating-and-using-a-dynamic-link-library-cpp?view=msvc-160 This step-by-step walkthrough shows how to use the Visual Studio IDE to create your own dynamic link library (DLL) written in Micr…

Total Commander 8.52 Beta 1

Total Commander 8.52 Beta 1http://www.ghisler.com/852_b1.php 10.08.15 Release Total Commander 8.52 beta 1 (32/64) 05.08.15 Fixed: Windows 10: Loading drive buttonbar hanging on some devices (e.g. Surface Pro 3) when SD-Card was in internal card reade…