VB.Net by API/System.Data.SqlClient/SqlDataReader

SqlDataReader.GetOrdinal

  
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 * FROM Employee"
        cmd.Connection = con
        Try
            con.Open()
            Dim reader As SqlDataReader = cmd.ExecuteReader()
            Dim OrderIDIdx As Integer = reader.GetOrdinal("ID")
            "Dim OrderDateIdx As Integer = reader.GetOrdinal("FirstName")
            "Dim OrderFreightIdx As Integer = reader.GetOrdinal("LastName")
            Do
                While reader.Read()
                    Dim OrderID As Integer = reader.GetInt32(OrderIDIdx)
                    "Dim OrderDate As DateTime = reader.GetDateTime(OrderDateIdx)
                    "Dim OrderFreight As Decimal = reader.GetDecimal(OrderFreightIdx)
                    "Console.WriteLine(OrderID & vbTab & OrderDate & vbTab & OrderFreight)
                    Console.WriteLine(OrderID & vbTab )
                End While
            Loop While reader.NextResult()
            reader.Close()
        Finally
            con.Close()
        End Try
    End Sub
End Class

SqlDataReader.GetSchemaTable()

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

public class MainClass
   Shared Sub Main()
      Dim thisConnection As New SqlConnection("server=(local)\SQLEXPRESS;" & _
          "integrated security=sspi;database=MyDatabase")
      Dim sql As String = "SELECT * FROM Employee"
      Dim thisCommand As New SqlCommand(sql, thisConnection)
      Try
         thisConnection.Open()
         Console.WriteLine("Connection Opened")
         Dim thisReader As SqlDataReader = thisCommand.ExecuteReader()
         Dim schema As DataTable = thisReader.GetSchemaTable()
         For Each row As DataRow In schema.Rows
            For Each col As DataColumn In schema.Columns
               Console.WriteLine(col.ColumnName & " = " & row(col).ToString())
            Next
         Next
         thisReader.Close()
      Catch ex As SqlException
         Console.WriteLine("Error: " & ex.ToString())
      Finally
         thisConnection.Close()
         Console.WriteLine("Connection Closed")
      End Try
   End Sub
End Class

SqlDataReader.GetString

  
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 FirstName, LastName FROM Employee"
        cmd.Connection = con
        Try
            con.Open()
            Dim reader As SqlDataReader = cmd.ExecuteReader(CommandBehavior.SingleRow)
            While reader.Read()
                Console.WriteLine("{0} - {1}", _
                                reader.GetString(0), reader.GetString(1))
            End While
            reader.Close()
        Finally
            con.Close()
        End Try
    End Sub
End Class

SqlDataReader.NextResult()

  
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 * FROM Employee; SELECT * FROM Employee"
        cmd.Connection = con
        Try
            con.Open()
            Dim reader As SqlDataReader = cmd.ExecuteReader()
            Do
                While reader.Read()
                    Console.WriteLine(reader(0) & vbTab & reader(1))
                End While
            Loop While reader.NextResult()
            reader.Close()
        Finally
            con.Close()
        End Try
    End Sub
End Class

SqlDataReader.Read()

  
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 FirstName, LastName FROM Employee"
        cmd.Connection = con
        Try
            con.Open()
            Dim reader As SqlDataReader = cmd.ExecuteReader(CommandBehavior.SingleRow)
            While reader.Read()
                Console.WriteLine("{0} - {1}", _
                                reader.GetString(0), reader.GetString(1))
            End While
            reader.Close()
        Finally
            con.Close()
        End Try
    End Sub
End Class