connection

问题 I've tried many code to check internet connectivity from Apple docs and other sources. The problem is that if the address is google.com return TRUE , if it's gydsddsds.com return FALSE , but if I disconnect my PC from Internet it return again TRUE ! Have you got a really working method please? 回答1: Use reachability class . It checks the network connectivity 来源： https://stackoverflow.com/questions/6001082/check-internet-connection-on-iphone-doesnt-work

问题 Following on from my last question: I've written some code to upgrade a SQL Server database. Before I upgrade the database, I plan to limit access to the database with the following statement: ALTER DATABASE Test SET SINGLE_USER WITH ROLLBACK IMMEDIATE Before running this code, I'll give the user an opportunity to opt out. At the time of prompting the user, I thought it would be nice to show the list of active connections (continuously polled at a set interval); providing the user with a tool

问题 I am search in MySQL user connection limit in particular database, we got option user connection limit in overall database but not find any step which is provide connection limit on particular database level, if any one have some solution please let me know 回答1: You want to look at the 'account' level limitations: http://dev.mysql.com/doc/refman/5.0/en/user-resources.html You should already have a user for that database, and you can then set MAX_QUERIES_PER_HOUR <number> MAX_UPDATES_PER_HOUR

问题 I want to create a networked embedded device with an HTML5/JS one-page AJAX configuration application. My problem is: browsers open too much connections nowadays, in my device the number of concurrent connections is maximum 4 with a TCP stack in hardware (please remember, it is an embedded device). Any request through a socket > 4 seems to be lost, one has to press F5 until a combination of application and cache elements is sitting in the browser. Now my initial idea was to use a js loader

问题 I'm new to Windows CE so tack it easy. I want to create a GPRS connection pragmatically and dial it in C# for windows CE 5.0 (Visual Stdio 2008). I searched a lot more that 100 pages but nothing!!! for example : http://msdn.microsoft.com/en-us/library/bb840031.aspx For connecting GPRS I have to dial *99# and some settings but I don't know how to use these sample codes with my settings. The connection management tacks no settings or I do not know how. Is there any sample code to create GPRS

问题 I have several databases: - curr - curr_add and many others on the same MariaDB instance. When I submit an sql to curr_add I get connection and the results. When I send the query to curr I get the error: MariaDB: ERROR 2013 (HY000): Lost connection to MySQL server during query and the service stops. When I restart the service each time I want to access the database curr the serivice stops. This is not the case for all other databases of the same instance. The instance and databases exists

问题 I was working on a website on my local computer (mac OS High Sierra) and had put some redirects in the websites .htaccess file (in order to get images from the remote server instead of downloading them). After this it seemed that I could no longer access the website from my Chrome browser. Chrome would answer to any URL leading to the remote server with ERR_CONNECTION_REFUSED . I tried other browsers on my computer such as Firefox, Chrome Canary, Chromium and Opera. None of them could provide

问题 I am trying to do some testing, i am using MAMP and trying to connect to my SQL database on my server. I haven't used PDO before and am having a hard time tracking down what error codes mean what. I am getting this: SQLSTATE[HY000] [2003] Can't connect to MySQL server on 'hostname' (60) My connection function: function getConnection() { $dbhost="hostname"; $dbuser="user"; $dbpass="password"; $dbname="somedb"; $dbh = new PDO("mysql:host=$dbhost;dbname=$dbname", $dbuser, $dbpass); $dbh-

问题 I am aware that there are tons of questions around about this problem but I tried every ungodly way to fix it, still no result. I have created a "test" Derby database within Netbeans. Everything works fine, I can execute SQL commands, alter tables and all within application. But i have to start the server everytime when I open netbeans. But I want my application's itself to start the server with codes. I guess i tried everything to do it. Class.forName("org.apache.derby.jdbc.EmbeddedDriver");

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 7 years ago . Ive seen some apps where you can open your computers web-browser, type in the local IP address to the android device, and access a homepage that hosts from the device. An example is this app: Finger Timer - play.google.com Does anyone know how this is done? Does Google have an API for this, or do you have any