Imports System.Data.SqlClient. Public Class Phonebook

Transcription

1 Imports System.Data.SqlClient Public Class Phonebook Dim vbdatabasedataset As New vbdatabasedataset() Dim PhonebookTableAdapter As New vbdatabasedatasettableadapters.phonebooktableadapter() Dim selection As ListViewItem Dim data_input(4) As TextBox Dim Stored_Data As DataTable Private Sub Phonebook_Load(sender As Object, e As EventArgs) Handles MyBase.Load Me.PhonebookTableAdapter.Fill(vbDataBaseDataSet.Phonebook) PopulateListview() data_input(0) = idtextbox data_input(1) = lntextbox data_input(2) = fntextbox data_input(3) = exttextbox data_input(4) = deptextbox Private Sub SetupListView() 'leave this the same' sqllistview.view = View.Details sqllistview.gridlines = True sqllistview.fullrowselect = True sqllistview.multiselect = False sqllistview.columns.add("id", 50, HorizontalAlignment.Left) sqllistview.columns.add("last_name", 150, HorizontalAlignment.Left) sqllistview.columns.add("first_name", 150, HorizontalAlignment.Left) sqllistview.columns.add("extension", 150, HorizontalAlignment.Left) sqllistview.columns.add("department", 150, HorizontalAlignment.Left) Private Sub retbut_click(sender As Object, e As EventArgs) Handles retbut.click Try selection = sqllistview.selecteditems(0) Catch ex As Exception End Try If selection Is Nothing Then MessageBox.Show("Error: Nothing has been selected.") Dim index = 0 data_input(0).text = sqllistview.selecteditems(0).text For Each item In selection.subitems data_input(index).text = item.text index += 1

2 data_input(0).readonly = True MessageBox.Show("Retrieved employee# " + selection.text) Private Sub upbut_click(sender As Object, e As EventArgs) Handles upbut.click If selection Is Nothing Then MessageBox.Show("Error: Nothing Selected") Dim index = 0 sqllistview.selecteditems(0).text = data_input(0).text Dim i As Integer = 0 For Each item In data_input selection.subitems(index).text = item.text index += 1 Stored_Data.Rows(selection.Index).Item(i) = data_input(i).text MessageBox.Show("Updated employee # " + selection.text) Sub PopulateListview() ' leave this the same Stored_Data = Me.PhonebookTableAdapter.GetData() For i As Integer = 0 To Stored_Data.Rows.Count() - 1 Dim dr As DataRow = Stored_Data.Rows(i) Dim listitem As ListViewItem = New ListViewItem(dr("ID").ToString()) listitem.subitems.add(dr("last_name").tostring()) listitem.subitems.add(dr("first_name").tostring()) listitem.subitems.add(dr("extension").tostring()) listitem.subitems.add(dr("department").tostring()) sqllistview.items.add(listitem) Private Sub delbut_click(sender As Object, e As EventArgs) Handles delbut.click retbut.enabled = False MessageBox.Show("row " + sqllistview.selectedindices(0).tostring() + " has been deleted") Stored_Data.Rows.RemoveAt(sqlListView.SelectedIndices(0)) sqllistview.items.remove(sqllistview.selecteditems(0)) Private Sub clearbutton_click(sender As Object, e As EventArgs) Handles clbut.click For Each control As Control In Me.Controls If TypeOf control Is TextBox Then control.text = "" sqllistview.selecteditems.clear()

3 retbut.enabled = False delbut.enabled = False idtextbox.readonly = False selection = Nothing Private Sub deptextbox_textchanged(sender As Object, e As EventArgs) Handles deptextbox.textchanged Private Sub crbut_click(sender As Object, e As EventArgs) Handles crbut.click If Not data_input(3).text.length = 4 Or Not IsNumeric(data_Input(3).Text) Then MessageBox.Show("Error: extension must be 4 digits, no more or less.") Dim new_id As Integer If Integer.TryParse(sqlListView.Items.Item(sqlListView.Items.Count - 1).Text, new_id) Then new_id += 1 sqllistview.items.add(new_id) Dim row As DataRow = Stored_Data.NewRow() row(0) = new_id For i As Integer = 1 To data_input.length - 1 sqllistview.items(sqllistview.items.count - 1).SubItems.Add(data_Input(i).Text) row(i) = data_input(i).text Stored_Data.Rows.Add(row) MessageBox.Show("New Employee created, employee# " + new_id.tostring()) If Not data_input(3).text.length = 4 Or Not IsNumeric(data_Input(3).Text) Then MessageBox.Show("Error: extension must be 4 digits, no more or less.") Dim new_id As Integer If Integer.TryParse(data_Input(0).Text, new_id) Then Dim error_flag = False For Each Item In sqllistview.items If Item.text = new_id.tostring() Then error_flag = True Exit For

4 If Not error_flag Then Dim last As Integer Integer.TryParse(sqlListView.Items(sqlListView.Items.Count - 1).Text, last) If new_id > last Then sqllistview.items.add(new_id) Dim row As DataRow = Stored_Data.NewRow() row(0) = new_id For i As Integer = 1 To data_input.length - 1 sqllistview.items(sqllistview.items.count - 1).SubItems.Add(data_Input(i).Text) row(i) = data_input(i).text Stored_Data.Rows.Add(row) MessageBox.Show("Created employee # " + new_id.tostring()) For Each id As ListViewItem In sqllistview.items Dim integer_id As Integer If Integer.TryParse(id.Text, integer_id) Then If integer_id > new_id Then sqllistview.items.insert(sqllistview.items.indexof(id), new_id) Dim row As DataRow = Stored_Data.NewRow() row(0) = new_id For i As Integer = 1 To data_input.length - 1 sqllistview.items(sqllistview.items.indexof(id) - 1).SubItems.Add(data_Input(i).Text) row(i) = data_input(i).text Stored_Data.Rows.InsertAt(row, sqllistview.items.indexof(id) - 1) MessageBox.Show("New employee created employee# " + new_id.tostring()) Exit For MessageBox.Show("Error: ID already in use!") MessageBox.Show("Error: ID must be a real number") Private Sub Try Me.Validate() Me.ValidateChildren() Me.PhonebookTableAdapter.Update(Me.Stored_Data) Catch ex As Exception MessageBox.Show("An error has prevented the database from updating!" + ex.tostring())

5 End Try Private Sub sqllistview_selectedindexchanged(sender As Object, e As EventArgs) Handles sqllistview.selectedindexchanged If Not sqllistview.selecteditems.count = 0 Then retbut.enabled = True delbut.enabled = True Private Sub idtextbox_textchanged(sender As Object, e As EventArgs) Handles idtextbox.textchanged Private Sub lntextbox_textchanged(sender As Object, e As EventArgs) Handles lntextbox.textchanged Private Sub fntextbox_textchanged(sender As Object, e As EventArgs) Handles fntextbox.textchanged Private Sub exttextbox_textchanged(sender As Object, e As EventArgs) Handles exttextbox.textchanged

6 End Class