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App Inventor 2 网络微数据库你用对了吗? - App Inventor 2 中文网 - 清泛...
...
下面推荐2个中文网站,体验差不多,网站如下:
https://tinywebdb.cn/ 经测试,单个键值的容量大小约为 64KB 字节,超过则会保存失败。
https://tinywebdb.appinventor.space/ 经测试,单个键值的容量大小约为 9000 字节(9KB),超...
DendritasMqtt 拓展:用于 websocket 的Mqtt扩展 - App Inventor 2 拓展 - ...
...应该是原始版本,支持原生的TCP协议,用最新版本即可:https://www.fun123.cn/reference/iot/MQTT.html
请自行通过demo研究。
参考来源:https://community.appinventor.mi ... -with-service/14365
https://groups.google.com/d/msg/ ... cn5PzY/Kg8BJEPGAQAJ
Get output parameter value in ADO.NET
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static void Main(string[] args)
{
using( SqlConnection cn = new SqlConnection("server=(local);Database=Northwind;user id=sa;password=;"))
{
SqlCommand cmd = new SqlCommand("CustOrderOne", cn);
cmd.CommandType=CommandType.StoredProcedure ;
SqlParam...
Select where count of one field is greater than one
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I give an example up on Group By between two table in Sql:
Select cn.name,ct.name,count(ct.id) totalcity
from city ct left join country cn on ct.countryid = cn.id
Group By cn.name,ct.name
Having totalcity > 2
s...
基于PECL OAuth打造微博应用 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...致代码如下:
<?php
session_start();
$request_token_url = 'https://open.t.qq.com/cgi-bin/request_token';
$authorize_url = 'https://open.t.qq.com/cgi-bin/authorize';
$access_token_url = 'https://open.t.qq.com/cgi-bin/access_token';
$oauth = new OAuth(
'YOUR_CONSUMER_KEY',...
SqlDataAdapter vs SqlDataReader
... minimum amount of code you should have when using a SqlDataReader:
Using cn As New SqlConnection("..."), _
cmd As New SqlCommand("...", cn)
cn.Open()
Using rdr As SqlDataReader = cmd.ExecuteReader()
While rdr.Read()
''# ...
End While
End Using
End Usi...
App Inventor 2 低功耗蓝牙(BLE) 硬件接入、数据通信及IO控制 - App Invent...
...00001-B5A3-F393-E0A9-E50E24DCCA9E。标准16位UUID技术文档请参考:https://www.bluetooth.com/specifications/assigned-numbers/。
点此自助购买 以上演示的aia源码。BLE专业文档更多关于BLE更深入的技术原理介绍,请参考BLE技术揭秘。
最后做个推广即...
Better techniques for trimming leading zeros in SQL Server?
...pplication,
-- then you may skip the Case-Statement entirely and just use CN.CleanNumber .
DECLARE @WackadooNumber VarChar(50) = ' 0 0123ABC D0 '--'000'--
SELECT WN.WackadooNumber, CN.CleanNumber,
(CASE WHEN WN.WackadooNumber LIKE '%0%' AND CN.CleanNumber = '' THEN '0' ELSE CN.CleanNumber EN...
MFC AFX_WM_CREATETOOLBAR消息相关 - C/C++ - 清泛网 - 专注C/C++及内核技术
...指针。NULL 表示工具栏创建取消。
详细请参见:https://technet.microsoft.com/zh-cn/library/bb982948
定义:
BEGIN_MESSAGE_MAP(CMainFrame, CMDIFrameWndEx)
ON_WM_CREATE()
ON_COMMAND(ID_WINDOW_MANAGER, &CMainFrame::OnWindowManager)
ON_COMMAND(ID_VIEW_CUSTOMIZE, &...
C# CultureInfo命名空间 - 更多技术 - 清泛网 - 专注C/C++及内核技术
C# CultureInfo命名空间using System.Globalization;详细请参考MSDN:https: msdn.microsoft.com zh-cn library system.globalization.cultureinfo.aspxusing System.Globalization;
详细请参考MSDN:https://msdn.microsoft.com/zh-cn/library/system.globalization.cultureinfo.aspxC# CultureInfo ...
