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In the past year, the discussion list of various discussion forums or emails on the Internet has been VB. NET And C # To explore the advantages. The main problems that these discussions focus on are: Which one should I learn first, VB. NET Or C # ? I

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connection is successful, true is saved, false is not saved public sub new () 'constructor, establish a connection, open Database conn = new sqlclient. sqlconnection Conn. connectionstring = STR Conn. open () end sub 'queries whether the user in the database has the public function query_user (byval thisuser as model. classmodel) as Boolean 'database query statement dim sqlstr as string sqlstr = "select * From usertable where user_id = '" thisuser. user_name "'and user_pwd ='" thisuser. user

Next, let's take a look at sqlhelper. 1. UML diagram 2, three-tier architecture 3, sqlhelper 4, Configuration File 5, interface 6, design mode I want to begin by saying, in fact, I have successively published several articles about "VB. net Let's talk about this sqlhelper today. When I used the three-tier Data Center charging system for the first time, I didn't use sqlhelper at all, nor did I know what

1. UML diagram 2, three-tier architecture 3, sqlhelper 4, Configuration File 5, interface 6, design mode Next I wrote a few articles, but the last design pattern was not mentioned. This article has been put on hold for a long time because there are some things that have been busy, so I am really sorry to send this article so late. Next, let's take a look at the last article in the series of. Net In fact, this article has been put on hold for a long

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Learn how to make payments for card games in an online room using. net core mvc. Project name: GameCitysSystem) Source code github address: https://github.com/antdesigner/appleGameSVN Development Tool: vs2017 Database: mysql5.7 There are some precautions for the incomplete project Use the "applegameData. SQL" file to initialize the mysql database. The datab