Originally this article would like to write about how StackTrace can be lost, but now the content has become a discussion of how to deal with the problem of exception.Should not use try catch, when use? Also bothered me for a long time, as if
StackTrace: stores the stack call information of a method. What does it mean? Method A calls Method B, and method B calls method C. When you call method A, the StackTrace is probably like this: at Project. class. C in c: \ aaa \ Project \ class. cs:
Most of the applications need to be supported by the database interaction, then the relative database access is very important, the most basic is through the way of ADO, there are some relative ORM framework, such as Ef,nhibernate, and so on, follow-
Programmers can often come across a servlet application that connects to a company's database and provides customers with a specific service that is protected by a powerful authentication mechanism that thousands of customers worldwide use. The
Copy codeThe Code is as follows:Public class SqlOperation{# Region attributes/// /// The connection string stored in Web. config/// Protected static string connectionstring = System. Configuration. ConfigurationManager. ConnectionStrings ["hao"].
File downloads usually use an attachment to set the Content-disposition value to "attachment;filename=" + filepath in the HTTP response header, and to set the total length of the download file for Content-length (bytes per unit) To achieve.This
Connecting to the SQL Server database
The code is as follows
Copy Code
Using System;Using System.Collections;Using System.ComponentModel;Using System.Data;Using System.Data.SqlClient;Using System.Drawing;Using System.Web;
Copy Code code as follows:
public class Sqloperation
{
#region Properties
The connection string saved in the web.config
protected static string connectionstring = system.configuration.configurationmanager.connectionstrings["Hao".
Using a Java program to connect to Memcached, you need to add Memcached jar packs to your classpath.
Click to download: Spymemcached-2.10.3.jar
The following procedure assumes that the host of the Memcached service is 127.0.0.1 and the port is 11211.
private static string connstring=configurationmanager.connstrings["ConnString"]. ToString (); Add the appropriate database connection profile to the configuration in app. Config1. Formatting SQL statementsPerform additions and deletions and change
Using System;Using System. Globalization;Namespace ConvertDateTime{/// /// ConvertDateTime returns a brief description of the specified parameters.
/// Public class ConvertDate{Public ConvertDate (){}//************************************** *********
TCP Connection
The foundation of TCP is Socket. In the TCP connection, we will use ServerSocket and Socket. After the client and server establish a connection, the rest is basically the control of I/O.
Let's first look at a simple TCP communication,
Compilation of SQL parameter encapsulation class for database
Copy Code code as follows:
Using System;
Using System.Data;
Using System.Configuration;
Using System.Web;
Using System.Web.Security;
Using System.Web.UI;
Using System.Web.
Copy Code code as follows:
Using System;
Using System.Data;
Using System.Configuration;
Using System.Data.OracleClient;
Using System.Text;
Using System.Windows.Forms;
Using System.Xml;
Using Transactions;
DB Summary description
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