.NET平台下使用C#连接各种数据库

在.NET平台下，通常我们需要连接不同的数据库，这就需要我们配置连接字符串以及提供常用的class进行数据存取。

1.C#连接Access

@"Provider=Microsoft.ACE.OLEDB.12.0;data source='F:\Code\codebase\introspection\introspection\Data\OriginalData.accdb'"

public class OleDbDataSourceProvider : DbDataSourceProvider

{

/// <summary>

/// connection string is just like "Provider=Microsoft.ACE.OLEDB.12.0;data source='F:\Code\codebase\introspection\introspection\Data\OriginalData.accdb'"

/// </summary>

/// <param name="connectionString"></param>

public OleDbDataSourceProvider(string connectionString)

: base(connectionString)

{ }

public override DbConnection GetDbConnection()

{

return new OleDbConnection(this.ConnectionString);

}

public override DataAdapter CreateAdapter(string query, DbConnection connection)

{

return new OleDbDataAdapter(query, connection as OleDbConnection);

}

}

 2.C#连接SQL Server

@"Data Source=WSWINCNHZ0823;Initial Catalog=D:\SITES\TMS\SERVICES\DataService\APP_DATA\TMS.MDF;Integrated Security=True";

public class SqlDataSourceProvider : DbDataSourceProvider

{

/// <summary>

/// the connections string is just like @"Data Source=WSWINCNHZ0823;Initial Catalog=D:\SITES\TMS\SERVICES\DataService\APP_DATA\TMS.MDF;Integrated Security=True";

/// </summary>

/// <param name="connectionString"></param>

public SqlDataSourceProvider(string connectionString)

: base(connectionString)

{

}

public override DbConnection GetDbConnection()

{

var connection = new SqlConnection(this.ConnectionString);

return connection;

}

public override DataAdapter CreateAdapter(string query, DbConnection connection)

{

return new SqlDataAdapter(query, connection as SqlConnection);

}

}

3.C#连接Oracle

public class OracleDataSourceProvider : DbDataSourceProvider

{

public OracleDataSourceProvider(string connectionString)

: base(connectionString)

{ }

public override DbConnection GetDbConnection()

{

return new OracleConnection(this.ConnectionString);

}

public override DataAdapter CreateAdapter(string query, DbConnection connection)

{

return new OracleDataAdapter(query, connection as OracleConnection);

}

}

4.C#连接MySQL

Based on MySQLDriverCS	@"Data Source=test;Password=***;User ID=root;Location=localhost;Port=3306;Extended Properties="""
	public class MySqlDataSourceProvider : DbDataSourceProvider { public MySqlDataSourceProvider(string connectionString) : base(connectionString) { } public override DbConnection GetDbConnection() { return new MySQLConnection(this.ConnectionString); } public override DataAdapter CreateAdapter(string query, DbConnection connection) { return new MySQLDataAdapter(query, connection as MySQLConnection); } }
Based on net connector	@"SERVER=localhost;DATABASE=sakila;UID=root;PASSWORD=626912";
	public class MySqlDataSourceProviderBasedOnNetConnector : DbDataSourceProvider { /// <summary> /// this is based on net connector, connection string is just like @"SERVER=localhost;DATABASE=sakila;UID=root;PASSWORD=***" /// </summary> /// <param name="connectionString"></param> public MySqlDataSourceProviderBasedOnNetConnector(string connectionString) : base(connectionString) { } public override DbConnection GetDbConnection() { return new MySqlConnection(this.ConnectionString); } public override DataAdapter CreateAdapter(string query, DbConnection connection) { return new MySqlDataAdapter(query, connection as MySqlConnection); } }

5.C#连接IBM DB2

OleDbConnection1.Open(); 
//打开数据库连接 
OleDbDataAdapter1.Fill(dataSet1,"Address"); 
//将得来的数据填入dataSet 
DataGrid1.DataBind(); 
//绑定数据 
OleDbConnection1.Close(); 
//关闭连接 
//增加数据库数据

在Web
Form上新增对应字段数量个数的TextBox，及一个button，为该按键增加Click响应事件代码如下：

this.OleDbInsertCommand1.CommandText
= "INSERTsintosADDRESS(NAME, 
EMAIL, AGE, ADDRESS) VALUES 
('"+TextBox1.Text+"','"+TextBox2.Text+"','"+TextBox3.Text+"','"+TextBox4.Text+"')"; 
OleDbInsertCommand1.Connection.Open(); 
//打开连接 
OleDbInsertCommand1.ExecuteNonQuery(); 
//执行该SQL语句 
OleDbInsertCommand1.Connection.Close(); 
//关闭连接

6.C#连接SyBase

Provider=Sybase.ASEOLEDBProvider.2;Initial
Catalog=数据库名;User ID=用户名;Data Source=数据源;Extended
Properties="";Server Name=ip地址;Network
Protocol=Winsock;Server Port Address=5000;

7.C#连接Express

"Data
Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\TMS.mdf;Integrated
Security=True;User Instance=True"

public class SqlServerExpressDataSourceProvider : DbDataSourceProvider

{

/// <summary>

/// connection string is just
like @"Data
Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\TMS.mdf;Integrated
Security=True;User Instance=True"

/// </summary>

/// <param
name="connectionString"></param>

public SqlServerExpressDataSourceProvider(string connectionString)

: base(connectionString)

{ }

public override DbConnection
GetDbConnection()

{

return new SqlConnection(this.ConnectionString);

}

public override DataAdapter
CreateAdapter(string query, DbConnection connection)

{

return new SqlDataAdapter(query,
connection as SqlConnection);

}

}