VB.Net by API/System.Data.SqlClient/SqlConnection — различия между версиями

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Текущая версия на 12:50, 26 мая 2010

SqlConnection.Database

  
Imports System
Imports System.Data
Imports System.Data.SqlClient
public class MainClass
   Shared Sub Main()
      Dim connString As String = "server=(local)\SQLEXPRESS; " & _
         "integrated security=sspi;"
      Dim conn As New SqlConnection(connString)
      Try
         conn.Open()
         Console.WriteLine("Connection Opened")
         Console.WriteLine("Connection Properties")
         Console.WriteLine("- ConnectionString : {0}",conn.ConnectionString)
         Console.WriteLine("- Database : {0}",conn.Database)
         Console.WriteLine("- DataSource : {0}", conn.DataSource)
         Console.WriteLine("- ServerVersion : {0}", conn.ServerVersion)
         Console.WriteLine("- State : {0}", conn.State)
         Console.WriteLine("- WorkstationId : {0}", conn.WorkstationId)
      Catch ex As SqlException
         Console.WriteLine("Error: " & ex.ToString())
      Finally
         conn.Close()
         Console.WriteLine("Connection Closed")
      End Try
   End Sub
End Class


SqlConnection.DataSource

  
Imports System
Imports System.Data
Imports System.Data.SqlClient
public class MainClass
   Shared Sub Main()
      Dim connString As String = "server=(local)\SQLEXPRESS; " & _
         "integrated security=sspi;"
      Dim conn As New SqlConnection(connString)
      Try
         conn.Open()
         Console.WriteLine("Connection Opened")
         Console.WriteLine("Connection Properties")
         Console.WriteLine("- ConnectionString : {0}",conn.ConnectionString)
         Console.WriteLine("- Database : {0}",conn.Database)
         Console.WriteLine("- DataSource : {0}", conn.DataSource)
         Console.WriteLine("- ServerVersion : {0}", conn.ServerVersion)
         Console.WriteLine("- State : {0}", conn.State)
         Console.WriteLine("- WorkstationId : {0}", conn.WorkstationId)
      Catch ex As SqlException
         Console.WriteLine("Error: " & ex.ToString())
      Finally
         conn.Close()
         Console.WriteLine("Connection Closed")
      End Try
   End Sub
End Class


SqlConnection.InfoMessage

  
Imports System
Imports System.Collections
Imports System.Data
Imports System.IO
Imports System.Xml.Serialization
Imports System.Windows.Forms
Imports System.Data.SqlClient

Public Class MainClass
    Shared Dim WithEvents con As SqlConnection
    Shared Sub Main()
        con = New SqlConnection("Server=(local)\SQLEXPRESS;Initial Catalog=master;Integrated Security=SSPI") 
        Dim cmd As New SqlCommand()
        cmd.rumandText = "PRINT("This raises an InfoMessage event")"
        cmd.Connection = con
        Try
            con.Open()
            cmd.ExecuteNonQuery()
        Finally
            con.Close()
        End Try
    End Sub
    Shared Sub con_InfoMessage(ByVal Sender As Object, _
                 ByVal E As SqlInfoMessageEventArgs) Handles con.InfoMessage
        Console.WriteLine( _
                   "{0} - {1}", "InfoMessage", E.Errors.Item(0).ToString())
    End Sub
End Class


SqlConnection.ServerVersion

  
Imports System
Imports System.Data
Imports System.Data.SqlClient
public class MainClass
   Shared Sub Main()
      Dim connString As String = "server=(local)\SQLEXPRESS; " & _
         "integrated security=sspi;"
      Dim conn As New SqlConnection(connString)
      Try
         conn.Open()
         Console.WriteLine("Connection Opened")
         Console.WriteLine("Connection Properties")
         Console.WriteLine("- ConnectionString : {0}",conn.ConnectionString)
         Console.WriteLine("- Database : {0}",conn.Database)
         Console.WriteLine("- DataSource : {0}", conn.DataSource)
         Console.WriteLine("- ServerVersion : {0}", conn.ServerVersion)
         Console.WriteLine("- State : {0}", conn.State)
         Console.WriteLine("- WorkstationId : {0}", conn.WorkstationId)
      Catch ex As SqlException
         Console.WriteLine("Error: " & ex.ToString())
      Finally
         conn.Close()
         Console.WriteLine("Connection Closed")
      End Try
   End Sub
End Class


SqlConnection.StateChange

  
Imports System
Imports System.Collections
Imports System.Data
Imports System.IO
Imports System.Xml.Serialization
Imports System.Xml
Imports System.Windows.Forms
Imports System.Data.SqlClient

Public Class MainClass
    Shared Dim WithEvents con As SqlConnection
    Shared Sub Main()
        con = New SqlConnection("Server=(local)\SQLEXPRESS;Initial Catalog=MyDatabase;Integrated Security=SSPI") 
        Dim cmd As New SqlCommand()
        cmd.rumandText = "SELECT TOP 5 FirstName, LastName FROM Employee"
        cmd.Connection = con
        Try
            con.Open()
            Dim reader As SqlDataReader = cmd.ExecuteReader()
            While reader.Read()
                Console.WriteLine( _
                       "{0} - {1}", reader.GetString(0), reader.GetString(1))
            End While
            reader.Close()
        Finally
            con.Close()
        End Try
    End Sub
    Shared Sub con_StateChange(ByVal Sender As Object, _
                 ByVal E As StateChangeEventArgs) Handles con.StateChange
        Console.WriteLine( _
                   "{0} - {1}", "ConnectionState", E.CurrentState.ToString())
    End Sub
End Class


SqlConnection.Version

  
Imports System
Imports System.Data
Imports System.Data.SqlClient
public class MainClass
   Shared Sub Main()
      Dim connString As String = "server=(local)\SQLEXPRESS; " & _
         "integrated security=sspi;"
      Dim conn As New SqlConnection(connString)
      Try
         conn.Open()
         Console.WriteLine("Connection Opened")
         Console.WriteLine("Connection Properties")
         Console.WriteLine("- ConnectionString : {0}",conn.ConnectionString)
         Console.WriteLine("- Database : {0}",conn.Database)
         Console.WriteLine("- DataSource : {0}", conn.DataSource)
         Console.WriteLine("- ServerVersion : {0}", conn.ServerVersion)
         Console.WriteLine("- State : {0}", conn.State)
         Console.WriteLine("- WorkstationId : {0}", conn.WorkstationId)
      Catch ex As SqlException
         Console.WriteLine("Error: " & ex.ToString())
      Finally
         conn.Close()
         Console.WriteLine("Connection Closed")
      End Try
   End Sub
End Class


SqlConnection.WorkstationId

  
Imports System
Imports System.Data
Imports System.Data.SqlClient
public class MainClass
   Shared Sub Main()
      Dim connString As String = "server=(local)\SQLEXPRESS; " & _
         "integrated security=sspi;"
      Dim conn As New SqlConnection(connString)
      Try
         conn.Open()
         Console.WriteLine("Connection Opened")
         Console.WriteLine("Connection Properties")
         Console.WriteLine("- ConnectionString : {0}",conn.ConnectionString)
         Console.WriteLine("- Database : {0}",conn.Database)
         Console.WriteLine("- DataSource : {0}", conn.DataSource)
         Console.WriteLine("- ServerVersion : {0}", conn.ServerVersion)
         Console.WriteLine("- State : {0}", conn.State)
         Console.WriteLine("- WorkstationId : {0}", conn.WorkstationId)
      Catch ex As SqlException
         Console.WriteLine("Error: " & ex.ToString())
      Finally
         conn.Close()
         Console.WriteLine("Connection Closed")
      End Try
   End Sub
End Class
Источник — «http://vbex.ru/index.php?title=VB.Net_by_API/System.Data.SqlClient/SqlConnection&oldid=2370»