connection

问题 I've created a database an a table ("Mail") having 2 columns: id INTEGER, content INTEGER. In my aplication I have tested the connection and it works well. using Finisar.SQLite; ... string db = "mydatabase"; SQLiteConnectionsql_con = new SQLiteConnection("Data Source=" + db + ";Version=3;New=False;Compress=True;"); sql_con.Open(); sql_con.Close(); After this I have alter the table "Mail" and it look like this: id INTEGER, content INTEGER, accountid INTEGER. When I tryed the connection again

问题 I'm trying to start my Node on a command prompt like this: C:\IBM\WebSphere\AppServer\profiles\AppSrv01\bin>startnode ADMU0128I: Starting tool with the AppSrv01 profile ADMU3100I: Reading configuration for server: nodeagent ADMU3200I: Server launched. Waiting for initialization status. ADMU3011E: Server launched but failed initialization. Server logs, startServer.log, and other log files under C:\IBM\WebSphere\AppServer\profiles\AppSrv01\logs\nodeagent should contain failure information What

问题 I'm using the following code as the server for sockets while i'm trying to learn sockets, but the client code will work once, i have to run the server script every time before i run the clint code. And so when do i ran this server.php to keep listening for client requests? SERVER.PHP $host = "127.0.0.1"; $port = 25003; set_time_limit(0); $socket = socket_create(AF_INET, SOCK_STREAM, 0) or die("Could not create socket\n"); $result = socket_bind($socket, $host, $port) or die("Could not bind to

问题 I'm using Java to create a client/server application that communicates using TCP. The network that the client is running on has an outbound firewall that prevents the client from connecting to the server. Is there any way/workaround to create a TCP connection through this firewall? I have tried to use common ports that are open such as port 80, 443, and 113, however the firewall appears to drop the connection once it is made (possibly by detecting non-protocol packets). An alternative would

问题 When you create a datacontext, its connection is closed until you retrieve objects and it stays open when you retrieve objects in case you use deferred operators or late binding. Is it possible (in an extension method of the datacontext of not) to force the datacontext to open its Connection without querying LINQ with LINQ or doing a fake query to the database with ExecuteQuery, ExecuteCommand, etc? Thanks 回答1: You can use the DataContext.Connection property to retrieve the connection, and

问题 My Co-worker told me that AJAX connection alive until a user closes his/her browser. As far as I know, ajax connection closes its connection when its request has completed. I tested it with Firebug and a HTTP monitoring tool, I noticed that AJAX connection closes itself. Is he correct???? 回答1: Break down what AJAX is -- and XMLHttpRequest. It's a connection to a URI endpoint for some resource (image, text, whatever). Your browser closes the HTTP connection as soon as it's done. 回答2: Ajax is

问题 We are using an application that contains a jboss @Service mbean which encapsulates a javax.jms.Connection object. During startup of the mbean the connection is created by initializing a remote InitialContext, looking up the ConnectionFactory from that context, and creating a connection from that factory: @Service public class JMSPublisher extends etcc.... { private Connection connection; protected void startService() { Context ctx = getRemoteInitialContext(); ConnectionFactory

问题 I have to create PHP web service with Firebird db . This is the first time I configure connection with this db and I cant get it right. I followed every instructions from php manual site, copied neccesry dll files to win/syste32 folder etc. and it's not working. I dont understand this part: Use --with-pdo-firebird[=DIR] to install the PDO Firebird extension, where the optional [=DIR] is the Firebird base install directory. $ ./configure --with-pdo-firebird Where should I run this? 回答1: These

问题 This question already has an answer here : Closed 7 years ago . Possible Duplicate: android jdbc odbc connection before i used oracle database 11g for my android application and successfully stored values. Unfortunately my oracle database 11g could not open due to some problem . I uninstalled oracle 11g and installed oracle database 10g edition. now i compiled program and close emulator and open table in oracle the values could not be stored . I dont know how this problem occur. Here in my

问题 I set up Hadoop(2.6.0) with multi machines mode : 1 namenode + 3 datanodes. When I used command : start-all.sh, they (namenode, datanode, resource manager, node manager) worked ok. I checked it with jps command and result on each node were bellow: NameNode : 7300 ResourceManager 6942 NameNode 7154 SecondaryNameNode DataNodes: 3840 DataNode 3924 NodeManager And I also uploaded sample text file on HDFS at: /user/hadoop/data/sample.txt. Absolutely no error at that moment. But when I tried to run