VB.Net/Database ADO.net/SqlCommand Delete

Delete database record

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 deleteSql As String = _
         "DELETE FROM Employee " & _
         "WHERE ID = @ID"
      Try
         Dim da As New SqlDataAdapter
         da.SelectCommand = New SqlCommand(sql, thisConnection)
         Dim ds As New DataSet
         da.Fill(ds, "Employee")
         Dim dt As DataTable = ds.Tables("Employee")
         Console.WriteLine("Before altering the dataset")
         For Each row As DataRow In dt.Rows
            Console.WriteLine("{0} | {1} | {2}", _
               row("ID").ToString().PadRight(10), _
               row("FirstName").ToString().PadRight(10), _
               row("LastName"))
         Next
         Dim deleteCmd As New SqlCommand(deleteSql, thisConnection)
         deleteCmd.Parameters.Add("@ID", _
            SqlDbType.Int, 4, "ID")
         Dim filter1 As String = _
            "firstname = "Joe" and lastname = "Yin""
         For Each row As DataRow In dt.Select(filter1)
            row.Delete()
         Next

         da.DeleteCommand = deleteCmd
         da.Update(ds, "employee")
         Console.WriteLine("After altering the dataset")
         For Each row As DataRow In dt.Rows
            Console.WriteLine("{0} | {1} | {2}", _
               row("ID").ToString().PadRight(10), _
               row("FirstName").ToString().PadRight(10), _
               row("LastName"))
         Next
      Catch ex As SqlException
         Console.WriteLine("Error: " & ex.ToString())
      Finally
         thisConnection.Close()
         Console.WriteLine("Connection Closed")
      End Try
   End Sub
End Class

Execute Delete command and check the result

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")
      "Create Command object
      Dim nonqueryCommand As SqlCommand = thisConnection.CreateCommand()
      Try
         " Open Connection
         thisConnection.Open()
         Console.WriteLine("Connection Opened")
         "Create Command objects
         Dim scalarCommand As New SqlCommand("SELECT COUNT(*) FROM Employee", thisConnection)
         " Execute Scalar Query
         Console.WriteLine("Before INSERT, Number of Employees = {0}", _
            scalarCommand.ExecuteScalar())

         " Set up and execute DELETE Command
         nonqueryCommand.rumandText = _
            "DELETE FROM Employee WHERE " & _
            "Firstname="A" AND Lastname="A""
         Console.WriteLine("Executing {0}", nonqueryCommand.rumandText)
         Console.WriteLine("Number of rows affected : {0}", _
            nonqueryCommand.ExecuteNonQuery())
         " Execute Scalar Query
         Console.WriteLine("After Delete, Number of Employee = {0}", _
            scalarCommand.ExecuteScalar())
      Catch ex As SqlException
         " Display error
         Console.WriteLine("Error: " & ex.ToString())
      Finally
         " Close Connection
         thisConnection.Close()
         Console.WriteLine("Connection Closed")
      End Try
   End Sub
End Class