محتاج الكود بحث عن اخر فاتورة مبيعات (مستعجل يا اخواني)

PHP كود :
Private Sub btnSearch_Click(sender As Object, e As EventArgs) Handles btnSearch.Click
        Dim connectionString As String = "connection"
        Using connection As New SqlConnection(connectionString)
                     Dim query As String = "SELECT TOP 10 * FROM Invoices WHERE 1=1"

            If Not String.IsNullOrEmpty(txtDate.Text) Then
                query &= " AND InvoiceDate = @InvoiceDate"
            End If
            If Not String.IsNullOrEmpty(txtInvoiceNumber.Text) Then
                query &= " AND InvoiceNumber = @InvoiceNumber"
            End If
            If Not String.IsNullOrEmpty(txtCustomerName.Text) Then
                query &= " AND CustomerName LIKE @CustomerName"
            End If

            query &= " ORDER BY CreatedDate DESC"

            Using command As New SqlCommand(query, connection)
                              If Not String.IsNullOrEmpty(txtDate.Text) Then
                    command.Parameters.AddWithValue("@InvoiceDate", txtDate.Text)
                End If
                If Not String.IsNullOrEmpty(txtInvoiceNumber.Text) Then
                    command.Parameters.AddWithValue("@InvoiceNumber", txtInvoiceNumber.Text)
                End If
                If Not String.IsNullOrEmpty(txtCustomerName.Text) Then
                    command.Parameters.AddWithValue("@CustomerName", "%" & txtCustomerName.Text & "%")
                End If

                Dim adapter As New SqlDataAdapter(command)
                Dim table As New DataTable()
                adapter.Fill(table)
                dataGridViewResults.DataSource = table
            End Using
        End Using
    End Sub