SqlCommand.ExecuteReader() : SqlCommand « System.Data.SqlClient « VB.Net by API

1. VB.Net by API
2. System.Data.SqlClient
3. SqlCommand

SqlCommand.ExecuteReader()

  
Imports System
Imports System.Data
Imports System.Data.SqlClient


public class MainClass
   Shared Sub Main()
      Dim SqlConnection1 As New SqlConnection("server=(local)\SQLEXPRESS;" & _
          "integrated security=sspi;database=MyDatabase")

      Dim thisCommand As SqlCommand = SqlConnection1.CreateCommand()
      thisCommand.CommandText = "Select * from Employee"

      Try
         SqlConnection1.Open()
         Dim thisReader As SqlDataReader = thisCommand.ExecuteReader()
         Dim str As String = thisReader.GetValue(20).ToString()
         thisReader.Close()
      Catch ex As System.InvalidOperationException
         Dim str As String
         str = "Source : " & ex.Source
         str &= ControlChars.NewLine
         str &= "Exception Message : " & ex.Message
         str &= ControlChars.NewLine
         str &= "Stack Trace : " & ex.StackTrace
         Console.WriteLine("Specific Exception:" & str)
      Catch ex As System.Data.SqlClient.SqlException
         Dim str As String
         str = "Source : " & ex.Source
         str &= ControlChars.NewLine
         str &= "Exception Message : " & ex.Message
         Console.WriteLine("Database Exception" & str)

      Catch ex As System.Exception
         Dim str As String
         str = "Source : " & ex.Source
         str &= ControlChars.NewLine
         str &= "Exception Message : " & ex.Message
         Console.WriteLine("Generic Exception" & str )

      Finally
         If SqlConnection1.State = ConnectionState.Open Then
            Console.WriteLine("Finally block closing the connection")
            SqlConnection1.Close()
         End If
      End Try
   End Sub
End Class

   
    
  

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