ASP。NET连SQL7接口源代码？

作者： unknow

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(); 
  } 
}

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