C#

Applications on the handheld terminal need to connect to the server in real time, and the handheld device automatically jumps to sleep state after 5 minutes by default, although you can set the handheld device to never sleep in the advanced options

System. Data. OracleClient has a 32 K size limit when inserting large fields. Some methods of network collection are as follows (Microsoft enterprise database example ):   The transaction must begin before obtaining the temporary LOB. Otherwise,

C # Notes for connecting to the MySql database: 1、c‑linked mysqldata library to download a mysql-connector-net-6.0.4-noinstall.rar file containing a bunch of dll files. Put them all in ProjectBin and introduce them in ~ For mysql. data. cf. dll, do

Public class GetConn{/// /// Database connection string/// Public static string connString{Get{Return ConfigurationManager. deleetpipeline ["connString"];}}Public static string CrmConnString{Get{Return ConfigurationManager. deleetpipeline

I recently wrote a console program. This program has a simple function, that is, exporting data from the database (specifying the table name, specifying the table field name) to the WORD file, and the program has been completed, during the test, it

1 using System. Net;2 using System. IO;3 using System. Text. RegularExpressions;4 private string getHtml (string url, string charSet)5 // The url is the address of the website to be accessed, and charSet is the encoding of the target webpage. If

A Windows API is an API function for a Windows operating system. In C #, calling a Windows API is actually a call of a hosted code to an unmanaged code. The main format is:   Code highlighting produced by Actipro CodeHighlighter

First, it is not a good practice to access a private member of a class. We all know that Private Members cannot be accessed externally. A class contains many private members, such as private fields, private attributes, and private methods. For

1. arrays are fixed in size and cannot be scaled. Although the generic method System. Array. Resize can reset the Array size,However, this method re-creates an array with the new size and initializes it with elements of the old array. Then the

You need to return a value from the SQL query, such as the number of records in the table. You can use the ExecuteScalar () method. This method returns only one value. The following shows the console application code:Using System. Data; Using System.

In general, we use ADO. NET to query the database and return the generic set; and use SqlDataReader to read data and store the data to the object row by row.  Code Code highlighting produced by Actipro CodeHighlighter

Chapter 2 Basic Search Algorithms Data search is a basic computer programming task and has been studied for many years. This chapter only studies one aspect of finding a problem-finding a given value in the list (array. There are two basic methods

Overview Multithreading is an important aspect of attention when building large systems, especially in efficiency (how fast does the system run ?) And performance (the system works normally ?) To make a trade-off between them. The proper use of

I often see my colleagues write code like this: DataSet QueryDB (){DataSet ds = null; Try{// Do something}Catch (Exception ex){// Logs must be recorded here} Return ds;} There are several questions: 1: Obviously, if the QueryDB method has any

  C # default access level of the method: private C # default class access level: internal     1. default access modifier for elements in the namespace   Public: Any other code of the same assembly or other assembly that references the Assembly can

  In the past two days, I wrote code to control the CPU usage. It is displayed as a straight line or curve, and the PerformanceCounter class is used when it is displayed as a straight line.       I am still very interested in this category, and it

  In C/S In the WinForm program, if you want to allow a text box to only enter numbers or letters, you can only enter the following methods ('\ B means: Delete the key ungemb '):   Only letters can be entered Private void textBox2_KeyPress (object

  C # download the webpage source code to obtain the http status code HttpWebRequest hwr = (HttpWebRequest) WebRequest. Create ("http://www.baidu.com "); Hwr. AllowAutoRedirect = false; // redirection not allowed Hwr. Timeout = 10000; // connection

  In programs, DataRow is often used to save some data and complete the value transfer operation. In this case, some DataRow objects are formed, but they are organized using List or Datable. So how to initialize this DataRow? We know that DataRow is

// If you encounter a problem today, you need to pass an initialized value to another function and return the incremental value.// Sum up the difference between out and ref by the wayPrivate void button#click (object sender, EventArgs e){// The ref