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C# 實(shí)現(xiàn)基于ADO.NET框架的DBHelper工具類(簡化數(shù)據(jù)庫操作)_C#教程_腳本...
ADO.NET是.NET框架中用于與數(shù)據(jù)庫交互的核心組件,提供了一套用于連接數(shù)據(jù)庫、執(zhí)行SQL查詢、插入、更新和刪除數(shù)據(jù)的類庫,包括SqlConnection、SqlCommand、SqlDataReader等,本文介紹如何使用DBHelper類封裝數(shù)據(jù)庫操作,以提高代碼的可維護(hù)性和復(fù)用性,感興趣的朋友一起看看吧+ 目錄 GPT4.0+Midjo
www.dbjr.com.cn/program/326511b...htm 2025-6-6
Android操作SQLite基本用法_Android_腳本之家
第一句代碼中,創(chuàng)建Activity時(shí)會(huì)自動(dòng)生成。在Activity中創(chuàng)建數(shù)據(jù)庫,這里我們給數(shù)據(jù)庫起名為“info.db”,數(shù)據(jù)庫版本號(hào)為1,代碼如下: 1 2 3 //依靠DatabaseHelper帶全部參數(shù)的構(gòu)造函數(shù)創(chuàng)建數(shù)據(jù)庫 DBHelper dbHelper =newDBHelper(MainActivity.this,"info.db",null,1); SQLiteDatabase db = dbHelper.getWritableData...
www.dbjr.com.cn/article/2322...htm 2025-6-9
asp.net下使用DbProviderFactories的數(shù)據(jù)庫操作類_實(shí)用技巧_腳本之家
Dim dbfactory As DbProviderFactory = DbProviderFactories.GetFactory(dbProviderName) Dim dbconn As DbConnection = dbfactory.CreateConnection() dbconn.ConnectionString = XPDBHelper.dbConnectionString Return dbconn End Function '創(chuàng)建數(shù)據(jù)庫連接 Public Shared Function CreateConnection(ByVal connectionString As ...
www.dbjr.com.cn/article/238...htm 2025-5-20
Asp.Net Oracle數(shù)據(jù)的通用操作類_實(shí)用技巧_腳本之家
With the Partitioning, OLAP and Data Mining options 首先OraDbHelper.cs 復(fù)制代碼代碼如下: using System; using System.Data; using System.Configuration; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; usi...
www.dbjr.com.cn/article/215...htm 2025-5-19
php操作mysqli(示例代碼)_php實(shí)例_腳本之家
$dbHelper=new mysqliHelp; $dbHelper->connect('localhost', 'root', '', 'tt'); //$dbHelper->db->select_db("tt"); //$dbHelper->db->set_charset("utf8"); //這里如果是MYSQLI_USE_RESULT,下面的$dbHelper->data_seek($query,10);就會(huì)出錯(cuò) ...
www.dbjr.com.cn/article/424...htm 2025-5-29
Android實(shí)現(xiàn)商品展示效果_Android_腳本之家
dbHelper=new DBHelper(context,1); } public void add(Goods goods){ SQLiteDatabase sqLiteDatabase=dbHelper.getWritableDatabase(); ContentValues values=new ContentValues(); values.put("name",goods.getName()); values.put("amount",goods.getAmount()); sqLiteDatabase.insert("goods",null,values); ...
www.dbjr.com.cn/article/1141...htm 2025-6-7
C#中實(shí)現(xiàn)登錄功能的完整步驟_C#教程_腳本之家
DataTable table= DbHelper.GetDataSet(sql); //判斷表的行數(shù),大于等于1表示有數(shù)據(jù),用戶存在,否則返回null if (table.Rows.Count < 1) return null; //新建一個(gè)admin對(duì)象 Admin admin = new Admin(); admin.adminId = Convert.ToInt32(table.Rows[0]["adminId"]); admin.adminName = table.Rows[0]...
www.dbjr.com.cn/article/2143...htm 2025-6-5
System.Data.SQLite 數(shù)據(jù)庫詳細(xì)介紹_SQLite_腳本之家
public SQLiteDBHelper(string dbPath) { this.connectionString = "Data Source=" + dbPath; } /// /// 創(chuàng)建SQLite數(shù)據(jù)庫文件 /// /// 要?jiǎng)?chuàng)建的SQLite數(shù)據(jù)庫文件路徑 public static void CreateDB(string dbPath) { using (SQLiteConnection connection = new SQLiteConnection...
www.dbjr.com.cn/article/263...htm 2025-6-7
ADO.NET制做一個(gè)登錄案例_實(shí)用技巧_腳本之家
namespace ADO.NET登錄案例1 { public class DBHelper { public static string GetConnectionStrings() { //使用ConfigurationManager類,來獲取連接字符串的信息。 return ConfigurationManager.ConnectionStrings["ConStr"].ConnectionString; } } }4.這次我依然使用存儲(chǔ)過程,創(chuàng)建一個(gè)根據(jù)用戶名查詢的存儲(chǔ)過程: 1...
www.dbjr.com.cn/article/889...htm 2025-5-25
servlet分頁代碼示例_JSP編程_腳本之家
2.創(chuàng)建一個(gè) DBHelper 對(duì)象用以與數(shù)據(jù)庫進(jìn)行交互 復(fù)制代碼代碼如下: package com.dao; import com.tool.UserData; import java.math.BigDecimal; import java.sql.*; import java.util.*; import java.util.Date; /** * Created by lx_sunwei on 14-1-6. ...
www.dbjr.com.cn/article/452...htm 2025-6-6