1#region 私有构造函数和方法2 3private SqlHelper() { }4 5///<summary> 6/// 将SqlParameter参数数组(参数值)分配给SqlCommand命令. 7/// 这个方法将给任何一个参数分配DBNull.Value; 8/// 该操作将阻止默认值的使用. 9///</summary> 10///<param name="command">命令名</param> 11///<param name="commandParameters">SqlParameters数组</param> 12privatestaticvoid AttachParameters(SqlCommand command, SqlParamet...
privatestaticbool CheckDatabaseExists( string databaseName) {{string sqlCreateDBQuery;bool result = false;try{SqlConnection tmpConn = new SqlConnection(@"Data Source=(localdb)\ProjectsV13;Initial Catalog=Example;Integrated Security=True;Connect Timeout=30;Encrypt=False;TrustServerCertificate=False;ApplicationIntent=ReadWrite;MultiSubnetFailover=False;");sqlCreateDBQuery = string.Format("SELECT dat...
using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Configuration; using System.Data.SqlClient; using System.Data; namespace MYHelper {//不加public,只有dal私有引用;//封装执行sql server增删改查辅助类,提供相应执行sql语句和存储过程的方法//作者:白宁超(http://www.cnblogs.com/baiboy/)static class SQLHelper{//读取配置文件中的连接字符串static string con...
代码如下://需引用命名空间using System.Data; using System.Data.SqlClient;class DBHelper{//定义数据库连接语句,连接语句书写方法参考(文章最后)publicstaticstring connstr = "Data Source=.;Initial Catalog=MobileDB;Integrated Security=True";//创建数据库连接对象publicstatic SqlConnection conn = new SqlConnection (connstr);//定义datatable查询方法,返回tablepublicstatic DataTable Getdatatable(string sqls...
C#同步SQL Server数据库Schema1. 先写个sql处理类:using System; using System.Collections.Generic; using System.Data; using System.Data.SqlClient; using System.Text;namespace PinkDatabaseSync {class DBUtility : IDisposable{private string Server;private string Database;private string Uid;private string Password;private string connectionStr;private SqlConnection sqlConn;public void EnsureConnectionIsOp...
使用该方法,只需要传入几个必要的参数就可以进行数据库的远程连接测试了,连接成功返回TRUE,失败返回false。说明:第一个参数表示你在数据库中的用户,具有可以登录权限的第二个参数表示用户的密码,没有加密第三个参数表示登录的服务器的地址第四个参数表示登录的服务器的端口号第五个参数表示登录的数据库的名字一定记得必要的引用/// <summary> /// 测试数据库连通 /// </summary>public static bool db_connection_test(stri...
这个是针对ACCESS数据库操作的类,同样也是从SQLHELPER提取而来,分页程序的调用可以参考MSSQL那个类的调用,差不多的,只是提取所有记录的数量的时候有多一个参数,这个需要注意一下! using System; using System.Text; using System.Collections; using System.Collections.Specialized; using System.Data; using System.Data.OleDb; using System.Configuration; namespace HoverTree.Web.DBUtili...
1//2015/07/03 2using System;3using System.Collections.Generic;4using System.Linq;5using System.Text;6using System.Threading.Tasks;7using System.Data;8using System.Data.SqlClient;910namespace Ado.netstart_1 11{ 12class Program 13 { 14staticvoid Main(string[] args) 15 { 16//特殊的字符串,数据库连接串 17//第一种18string connectionString = "server=.;database=BookSample;uid=LJK;pwd=123456;"; ...
//对应数据库中的某个表 [Table(Name = "main.Student")] public class Student { [Column(Name = "StuName", DbType = "varchar(50)")] public string StuName { get; set; } [Column(Name = "StuNo", DbType = "varchar(20)", IsPrimaryKey = true)] public string StuNo { get; set; } } public class SqliteDataContext : DataContext { public Table<Student> Stu...
OpenFileDialog openfiledialog1 = new OpenFileDialog();if (openfiledialog1.ShowDialog() == DialogResult.OK){textBox1.Text = openfiledialog1.FileName;//文件路径 }string imageName = DateTime.Now.ToString("yyyymmddhhMMss");//生成文件名到数据库FileStream fs = new FileStream(textBox1.Text, FileMode.Open);BinaryReader br = new BinaryReader(fs);Byte[] byData = br.ReadBytes((int)fs.Length);//生成...
与数据库的连接主要有以下三种类:sqlconnection:数据库连接类;sqlcommand:数据库操作;sqldatareader:数据库读取;SqlDataReader dr = cmd.ExecuteReader();dr.hasrows:是否有数据;dr.read:下移指针读取数据;dr.fieldcount:获取结果集列数;dr.getname;获取指定列的列名; //创建数据库连接类对象 SqlConnection conn = new SqlConnection("server=.;database=mydb;user=??;password=??"); ...
原文:C#破解access数据库密码方法using System; using System.Collections.Generic; using System.IO; using System.Linq; using System.Text; using System.Windows.Forms;namespace Demo {class Program{[STAThread]static void Main(string[] args){OpenFileDialog f = new OpenFileDialog();if (f.ShowDialog() != DialogResult.OK) return;MessageBox.Show("密码:[" + GetPassword(f.FileName) + "]", "密码");}// 获取密码st...
string dbConStr = ConfigurationManager.ConnectionStrings["dbConStr"].ConnectionString;using (SqlConnection conn = new SqlConnection(dbConStr)){using (SqlCommand cmd = conn.CreateCommand()){conn.Open();cmd.CommandText = "SELECT * FROM UserInfo";// where UserName like ‘%a%‘";// cmd.Parameters.AddWithValue() SqlDataReader reader = cmd.ExecuteReader();reader.Read();label1.Text = reader.GetValue...
写在前面: SQLserver的C#封装:https://www.cnblogs.com/mexihq/p/11636785.html Oracle的C#封装:https://www.cnblogs.com/mexihq/p/11700741.html MySQL的C#封装:https://www.cnblogs.com/mexihq/p/12463423.html Access的C#封装:https://www.cnblogs.com/mexihq/p/12466970.html在日常的工作中,通常一个项目会大量用的数据库的各种基本操作,因此小编几个常见的数据库的操作封装成了一个dll方便后续的开发使用。本文则主要是...
数据库C#程序intint32textstringbigintint64binarySystem.Byte[]bitBooleancharstringdatetimeSystem.DateTimedecimalSystem.DecimalfloatSystem.DoubleimageSystem.Byte[]moneySystem.DecimalncharStringntextStringnumericSystem.DecimalnvarcharStringrealSystem.SinglesmalldatetimeSystem.DateTimesmallintInt16smallmoneySystem.DecimaltimestampSystem.DateTimetinyintSystem.BytevarbinarySystem.Byte[]varcharStringVaria...