ASP。NET连SQL7接口源代码？

源代码

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(); 
 } 
}

时间： 2024-09-30 03:55:29

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