c# Windows programming often uses multiple threads. When you want to change the page data of the main thread in the newly opened thread, you need to delegate through the delegate
public deleg
Month: October 2021
MySQL Delete Database
Use ordinary users to log in to the MySQL server. You may need specific permissions to create or delete MySQL databases, so we use the root user to log in here, and the root user has the highest pe
Limit the row as a sum of a column equal to a value in MySQL
I want to write a query that returns all rows until the sum of the values in one column reaches a certain value.
For example, in the following table:
DATE ETC Meeting
2013-02-01 00:0
C # Dahua camera capture class
1 class Camera < span style="color: #008000;">// Dahua camera class
2 {
3 private IDevice m_dev; /* Device object*/
4 List m_frameList = new List() ; /* Image cache list */
5 Thread render
Access element beyond the end of the array of C
I have been reading K&R’s book on C and found that the pointer algorithm in C allows access to an element beyond the end of the array. I know that C allows memory to do almost anything, but I just
MySQL command summary (3)
MySQL data query
Several common types of conditional query comparison operator <,>,<=, >=,=,!= logical transport symbol and, or, not fuzzy query where field like Value (% stands for r
Mysql – Detect lock table (locked by lock table)
Is there a way to detect locked tables in MySQL? I mean the table locked by the LOCK TABLE table WRITE/READ command.
(Please note that readers interested in detecting named locks acquired usi
Mysql library, table, record, related operations (1)
Library, table, record, related operations (1) Database configuration # The purpose of unified configuration through the configuration file: unified management of the server (mysqld) and client (cl
C # Netcore HTTP request package
public class NewHttpClient2
{
public enum BodyFormat
{
Formed, Json
}
public BodyFormat BodyType;
public string Method;
public Uri Uri;
public Encoding ContentEncoding;
public Di
[Mysql] mysql basic operation
Basic operation of MySQL Basic operation of data: CRUD (Create, Retrieve, Update, Delete Classified according to the object of operation, basic SQL operations can be divided into:
library operati