ASP.NET连SQL7接口源代码

核心提示：The following example shows what a simple ADO.NET application that connects to the Northwind database and returns a list of Categories would look like. The exam

The following example shows what a simple ADO.NET application that connects to the Northwind database and returns a list of Categories would look like. The example writes the output to the console, or command PRompt.

The following example shows what a simple ADO.NET application that connects to the Northwind database and returns a list of Categories. The example writes the output to the console, or command prompt.

SqlClient
[Visual Basic]
Imports System
Imports System.Data
Imports System.Data.SqlClient
Imports Microsoft.VisualBasic

Public Class Sample

　Public Shared Sub Main()
　　Dim nwindConn As SqlConnection = New SqlConnection("Data Source=localhost;" & _
　　　　　　　　　　　　　　　　　　　　　　　　　　　 "User Id=sa;PassWord=pwd;Initial Catalog=northwind")

　　Dim catCMD As SqlCommand = nwindConn.CreateCommand()
　　catCMD.CommandText = "SELECT CategoryID, CategoryName FROM Categories"

　　nwindConn.Open()

　　Dim myReader As SqlDataReader = catCMD.ExecuteReader()

　　Do While myReader.Read()
　　　Console.WriteLine(vbTab & "{0}" & vbTab & "{1}", myReader.GetInt32(0), myReader.GetString(1))
　　Loop

　　myReader.Close()
　　nwindConn.Close()
　End Sub
End Class
[C#]
using System;
using System.Data;
using System.Data.SqlClient;

class Sample
{
　public static void Main()
　{
　　SqlConnection nwindConn = new SqlConnection("Data Source=localhost;User Id=sa;Password=pwd;Initial Catalog=northwind");

　　SqlCommand catCMD = nwindConn.CreateCommand();
　　catCMD.CommandText = "SELECT CategoryID, CategoryName FROM Categories";

　　nwindConn.Open();

　　SqlDataReader myReader = catCMD.ExecuteReader();

　　while (myReader.Read())
　　{
　　　Console.WriteLine("\t{0}\t{1}", myReader.GetInt32(0), myReader.GetString(1));
　　}

　　myReader.Close();
　　nwindConn.Close();
　}
}
OleDb
[Visual Basic]
Imports System
Imports System.Data
Imports System.Data.OleDb
Imports Microsoft.VisualBasic

Public Class Sample

　Public Shared Sub Main()
　　Dim nwindConn As OleDbConnection = New OleDbConnection("Provider=SQLOLEDB;Data Source=localhost;" & _
　　　　　　　　　　　　　　　　　　　　　　　　　　　　　 "User Id=sa;Password=pwd;Initial Catalog=northwind")

　　Dim catCMD As OleDbCommand = nwindConn.CreateCommand()
　　catCMD.CommandText = "SELECT CategoryID, CategoryName FROM Categories"

　　nwindConn.Open()

　　Dim myReader As OleDbDataReader = catCMD.ExecuteReader()

　　Do While myReader.Read()
　　　Console.WriteLine(vbTab & "{0}" & vbTab & "{1}", myReader.GetInt32(0), myReader.GetString(1))
　　Loop

　　myReader.Close()
　　nwindConn.Close()
　End Sub
End Class
[C#]
using System;
using System.Data;
using System.Data.OleDb;

class Sample
{
　public static void Main()
　{
　　OleDbConnection nwindConn = new OleDbConnection("Provider=SQLOLEDB;Data Source=localhost;User Id=sa;Password=pwd;Initial Catalog=northwind");

　　OleDbCommand catCMD = nwindConn.CreateCommand();
　　catCMD.CommandText = "SELECT CategoryID, CategoryName FROM Categories";

　　nwindConn.Open();

　　OleDbDataReader myReader = catCMD.ExecuteReader();

　　while (myReader.Read())
　　{
　　　Console.WriteLine("\t{0}\t{1}", myReader.GetInt32(0), myReader.GetString(1));
　　}

　　myReader.Close();
　　nwindConn.Close();
　}
}