temp3
Imports System.IO
Public Class Form1
'Create private varables
Private addressDList As Dictionary(Of String, List(Of String))
Private lstAddress As List(Of Address)
Private fileName As String = "address.txt"
Private fs As FileStream
Private textIn As StreamReader
Private textOut As StreamWriter
Private addressItem As Address
Private searchTerm As String
Private tempAddress As Address
'Find adress function
Private Function FindAddress(ByVal nickName As String) As Address
For Each addr As Address In lstAddress
If addr.NickName = nickName Then
Return addr
End If
Next
'return nothing
Return Nothing
End Function
'create the subroutene for saveAllAddress
Private Sub SaveAllAddress()
Try
'if the file exists. Delete it
If File.Exists(fileName) Then
File.Delete(fileName)
Else
'Create new file if it does not exist
File.Create(fileName)
End If
'Create a new file if the file is not there
fs = New FileStream(fileName, FileMode.Create)
textOut = New StreamWriter(fs)
'Go through each of the values in the file
For Each kvp As KeyValuePair(Of String, List(Of String)) In addressDList
Dim addressEntry = New Address(kvp.Key, kvp.Value.Item(0), kvp.Value.Item(1))
textOut.WriteLine(addressEntry.NickName + "," + addressEntry.FullName + "," + addressEntry.Email)
Next
'close the file
textOut.Close()
Catch ex As IOException
MessageBox.Show(ex.Message, "IOException")
Finally
If fs IsNot Nothing Then
fs.Close()
End If
End Try
End Sub
'All the form load functions
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs)
addressDList = New Dictionary(Of String, List(Of String))
lstAddress = New List(Of Address)
'If the address file exists read the file
If File.Exists(fileName) Then
Try
fs = New FileStream(fileName, FileMode.Open) textIn = New StreamReader(fs) Do While textIn.Peek <> -1
'reads the line of the file that was opened
Dim row As String = textIn.ReadLine
Dim columns() As String = row.Split(CChar(","))
'if the contents does not exist add to the file
If Not addressDList.ContainsKey(columns(0)) Then
Dim lstNameEmail = New List(Of String)
lstNameEmail.Add(columns(1) + "," + columns(2))
lstNameEmail.Add(columns(3))
addressDList.Add(columns(0), lstNameEmail)
addressItem = New Address(columns(0), columns(1) + ", " + columns(2), columns(3))
lstAddress.Add(addressItem)
End If
Loop
textIn.Close()
'close the file
DataGridView1.DataSource = lstAddress
'Catch if the file is not found
Catch ex As FileNotFoundException
MessageBox.Show(fileName + "not found.", "File Not Found")
Catch ex As IOException
MessageBox.Show(ex.Message, "IOException")
Finally
If fs IsNot Nothing Then
fs.Close()
End If
End Try
End If
End Sub
'On click event for the search Private Sub btnSearch_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSearch.Click
Dim searchTerm As String
searchTerm = txtSearch.Text.Trim
'if the search term is blank
If searchTerm = "" Then
MessageBox.Show("Search Text is Blank")
Else
lstAddress = Nothing
End If
lstAddress = New List(Of Address)
'checks the input in the search box
For Each kvp As KeyValuePair(Of String, List(Of String)) In addressDList
Dim name(1) As String
name(0) = kvp.Value.Item(0)
Dim nameArray(1) As String
nameArray = Split(name(0), ",", 2)
Dim firstName As String
Dim lastName As String
Dim email As String
'Trims off any extras
firstName = nameArray(1)
lastName = nameArray(0)
firstName = firstName.Trim
lastName = lastName.Trim
email = kvp.Value.Item(1)
email = email.Trim
tempAddress = New Address(kvp.Key, kvp.Value.Item(0), kvp.Value.Item(1))
'conditions for the search
If searchTerm = "*" Then
lstAddress.Add(tempAddress)
ElseIf searchTerm = kvp.Key Then
lstAddress.Add(tempAddress)
ElseIf searchTerm = firstName Then
lstAddress.Add(tempAddress)
ElseIf searchTerm = lastName Then
lstAddress.Add(tempAddress)
ElseIf searchTerm = email Then
lstAddress.Add(tempAddress)
End If
Next
'return nothing if there is no result
DataGridView1.DataSource = Nothing
DataGridView1.DataSource = lstAddress
End Sub
'when the form is closing
Private Sub Form1_Closing(ByVal sender As Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles MyBase.Closing
'Calls the saveAllAddress sub
SaveAllAddress()
End Sub
'click event for the intert button
Private Sub btnInsert_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnInsert.Click
'Checks each of the text feild for blanks
If txtNick.Text = "" Then
MessageBox.Show("NickName is blank")
ElseIf txtName.Text = "" Then
MessageBox.Show("Name is blank")
ElseIf txtEmail.Text = "" Then
MessageBox.Show("Email is blank")
Else
'pass all of the values to varables
Dim nick As String
nick = txtNick.Text.Trim
Dim name As String
name = txtName.Text.Trim
Dim email As String
email = txtEmail.Text.Trim
'Places everything into an array
Dim tempAddress = New Address(nick, name, email)
'If the name is there then we will repace it and update
If addressDList.ContainsKey(nick) Then
Dim removeAddress As Address
removeAddress = FindAddress(nick)
addressDList.Remove(removeAddress.NickName)
lstAddress.Remove(removeAddress)
End If
'Stores the name into a string
Dim lstNameEmail = New List(Of String)
lstNameEmail.Add(tempAddress.FullName)
lstNameEmail.Add(tempAddress.Email)
addressDList.Add(tempAddress.NickName, lstNameEmail)
lstAddress.Add(tempAddress)
'Displays noting if the result was not entered.
DataGridView1.DataSource = Nothing
DataGridView1.DataSource = lstAddress
End If
End Sub
End Class
