VB.Net/Database ADO.net/Sql Data Type

Select @@Identity

  
Imports System.Windows.Forms
Imports System.Data.SqlClient
Imports System.Data

Public Class Form1
    Inherits System.Windows.Forms.Form
    Public Shared Sub Main()
        Dim MyIdentityValue As Integer
        Dim objConnection As New SqlClient.SqlConnection("server=.;database=pubs;trusted_connection=true")
        Dim objCommand As New SqlClient.SqlCommand("INSERT INTO jobs (desc, minV, maxV) VALUES("desc", 50, 100)")
        objConnection.Open()
        objCommand.Connection = objConnection
        If objCommand.ExecuteNonQuery > 0 = True Then
            Dim objIdentifier As New SqlClient.SqlCommand("Select @@Identity", objConnection)
            Try
                MyIdentityValue = objIdentifier.ExecuteScalar
            Catch
                MyIdentityValue = 0
            End Try
        End If
        objConnection.Close()
        System.Console.WriteLine(MyIdentityValue)
    End Sub
End Class

Sql data type: integer, date and decimal

 
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

Type safe data from SqlDataReader

 
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