catch exception ex

TPS: The so-called "each subclass of a table (table Per Subclass)": The parent class is a table, each subclass a table, the parent class table holds the public information, the Child class table only saves its own unique informationThis strategy

Build the exception package, write the Testexception.java program, the main method has the following code, to determine the possible exceptions, to capture processing. PackageCom.yichang; Public classTestException { Public Static voidMain (string[]

Add, delete, modify, and query mysql Databases Try{// Insert new user information into the databaseString strsql = "insert into httang_test.test (id, name, password, adress) values ('" + this. idTextBox. text + "','" + this. nameTextBox. text + "','"

Java thread synchronization and asynchronous thread pool1) Multi-threaded concurrency, multiple threads simultaneously request the same resource, will inevitably cause the data of this resource unsafe, a thread modified B lineProcess, and the B

Some users have long reported that the ArcSDE SDK does not directly obtain the number of element elements. Users can only obtain the total number of elements through the basic query loop, because the development of SDE has not been viewed, I didn't

Now do the program to convert the dynamic page into a static page, today teaches you to implement static page generation method in ASP.Using System;Using System.Data;Using System.Configuration;Using System.Web;Using System.Web.Security;Using

I have written an article about java multicast. Today, let's take a look at how java implements unicast in the LAN. Let's add two key points of network programming: 1. It is easier to look at the problem with the process as the object. A process is

1. First, let's take a look:2. ext codeCopy codeThe Code is as follows:// Ext. namespace ('xqh. ExtJs. framework ');XQH. ExtJs. Frame. RoleManage = function (){This. init ();};Ext. extend (XQH. ExtJs. Frame. RoleManage, Ext. util. Observable ,{Init:

Tag: height system execute test on () frame seconds oid PosObjective. There are no Task.run and Task.delay methods under NET4.0, and. NET4.5 has been implemented for those who are still using. NET4.0, how do you implement both methods Under.

1. Start with 1 new jsonutils classespublic class Jsonutils {/**** @author Wangwei JSON tool class* @param**//**** Serialize List object to JSON text*/public static String tojsonstring (list List){Jsonarray Jsonarray = jsonarray.fromobject

Increase://get the data on the WinForm firstSqlConnection conn =NewSqlConnection (Dbhelper.strconn); Try{Conn. Open (); stringsql =string. Format (@"INSERT into [dbo]. [Body] ([Danwei],[name],[junxian],[ruwu],[beizhu],[jiguan],[hunfou]

Java thread synchronization and asynchronous thread pool1) Multi-threaded concurrency, multiple threads simultaneously request the same resource, will inevitably cause the data of this resource unsafe,a thread modified B lineprocess data, while the

Directly modify the file path can be, others do not need to modify, Help class has been written for everyone, can be used directly1, Scroller:/** * Download File * @author Liupeng * @param request * @param response * @return * @throws Exception * * @

In Java, the Jsonobject and Jsonarray base classes are provided in the Json-lib-2.3-jdk15.jar package for JSON serialization and deserialization operations. But we are more accustomed to encapsulating it further and achieving better reuse.The

In this Web API-infested era, the Web service technology is actually a bit outdated, outdated technology does not mean that there is no use, and some places can still continue with his, I explained the Web service, from my recent interview was asked

1. Open the configuration file 2. Remove the unwanted block and add the log block 3. Add "Custom Trace Listener" 4. Define Attributes 5. Add Definition Class Library "customtracelistenerextensions" 6. Write the code as follows:

1. First look at the effect of the picture: 2.ext Code Copy Code code as follows: Ext.namespace (' Xqh. Extjs.frame '); Xqh. ExtJs.Frame.RoleManage = function () { This.init (); }; Ext.extend (XQH. ExtJs.Frame.RoleManage,

ASP tutorial. NET implementation XML insert and delete node information code The following implementation inserts node information into the appropriate location in the XML file 　 Let's say we want to change the original XML file structure by

First, the basic concept of multithreadingExclusive: Maintains state consistency by blocking harmful interference between multiple concurrent behaviors. Asynchronous methods are usually used sychronizedState dependency: Triggering, blocking,

Using System; Using System.Collections.Generic; Using System.Linq; Using System.Text; Using System.Security.Cryptography; Using System.IO; Namespace WindowsFormsApplication1 { #region TripleDES algorithm public class