C#ADO.NET操作数据代码汇总

核心提示：一．用SqlConnection连接SQL Server1..加入命名空间using System.Data.SqlClient;2.连接数据库SqlConnection myConnection = new SqlConnection();myConnection.ConnectionString = "u

一．用SqlConnection连接SQL Server

1..加入命名空间

using System.Data.SqlClient;

2.连接数据库

SqlConnection myConnection = new SqlConnection();

myConnection.ConnectionString = "user id=sa;password=sinofindb;initial catalog=test;data source=127.0.0.1;Connect Timeout=30";

myConnection.Open();

改进（更通用）的方法：

string MySqlConnection="user id=sa;password=sinofindb;Database =test;data source=127.0.0.1;Connect Timeout=30";

SqlConnection myConnection = new SqlConnection(MySqlConnection);

myConnection.Open();

二、用OleDbConnection连接

1.加入命名空间

using System.Data.OleDb;

2.连接sql server

string MySqlConnection="Provider=SQLOLEDB;Data Source=localhost;Initial Catalog=test;Integrated Security=SSPI;";

SqlConnection myConnection = new SqlConnection(MySqlConnection);

myConnection.Open();

3.连接Access(可通过建立.udl文件获得字符串)

string MySqlConnection="Provider=Microsoft.Jet.OLEDB.4.0;Data Source=c:db2000.mdb;

Persist Security Info=False;

4.连接Oracle(也可通过OracleConnection连接)

string MySqlConnection="Provider=MSDAORA;Data Source=db; user id=sa;password=sinofindb";

三.创建Command对象

1．SqlCommand 构造函数

①初始化 SqlCommand 类的新实例。public SqlCommand();

SqlCommand myCommand = new SqlCommand();