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WPF Datagrid contains ComboBox while display textblock when display and combobox in editing mode
XAML: <Window x:Class="WpfApplication1.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft ...
分类:Windows程序   时间:2020-07-25 09:54:03    阅读次数:103
MySQL中位数计算方法
在网上搜到的一种算法是利用自增长变量进行排序,然后再根据位置序号取。感觉有些复杂了,还是group_concat来的省事些 1. 按顺序聚合,逗号分隔,并计数 group_concat( number order by number asc) 2. 根据逗号拆分,判断奇偶数去截取中间位置的那个数 具 ...
分类:数据库   时间:2020-07-22 21:01:59    阅读次数:111
MYSQL批量修改
UPDATE `test`SET `code` = ( CASE WHEN `id` = 1 THEN 11 WHEN `id` = 2 THEN 22 WHEN `id` = 3 THEN 33 END )WHERE `id` IN (1, 2, 3); ...
分类:数据库   时间:2020-07-21 22:17:14    阅读次数:163
JVM垃圾回收概述
什么是垃圾 什么是垃圾( Garbage) 呢? ?垃圾是指在运行程序中没有任何指针指向的对象,这个对象就是需要被回收的垃圾。 ?外文: An object is considered garbage when it can no longer be reached from any pointer ...
分类:其他好文   时间:2020-07-21 22:00:23    阅读次数:63
When “ERROR CAN NOT MAP ERROR CODE : 21” is displayed
When “ERROR CAN NOT MAP ERROR CODE : 21” is displayed [1] Phenomenon ? “ERROR CAN NOT MAP ERROR CODE : 21” is displayed and the equipment does not ope ...
分类:其他好文   时间:2020-07-21 13:47:51    阅读次数:74
How to prevent user to login second time when its already logged in.
How to prevent user to login second time when its already logged in. If you are using Forms Authentication, it should already be storing your Authenti ...
分类:其他好文   时间:2020-07-21 09:34:28    阅读次数:78
2Ants(独立,一个个判,弹性碰撞,想象)
AntsDescriptionAn army of ants walk on a horizontal pole of length l cm, each with a constant speed of 1 cm/s. When a walking ant reaches an end of th ...
分类:其他好文   时间:2020-07-21 01:11:57    阅读次数:78
Codeforces #657 Problem B
##题目 Pasha loves to send strictly positive integers to his friends. Pasha cares about security, therefore when he wants to send an integer n, he encry ...
分类:其他好文   时间:2020-07-19 23:37:51    阅读次数:80
Eclipse: export project such that Windows and Mac can both run it (SWT)
You appear to be running a SWT application. On macOS you must specify the -XstartOnFirstThread option when running the jar to run SWT correctly: jar - ...
分类:Windows程序   时间:2020-07-19 23:37:21    阅读次数:101
goldengate Director web页面不能正确识别到goldengate 实例的状态
在Admintool中配置时,测试连接是通的,但在directorweb页面显示是不通的状态,如下图:在MOS上查到,CannotGetDirectorToRecognizeGoldenGateInstances--EOFfromGGSCI-unexpectedendofstream.Closingconnection(DocID1568098.1)APPLIESTO:ManagementPack
分类:Web程序   时间:2020-07-19 11:29:07    阅读次数:86
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