Autocomplete textbox question

Hello all,

I the following code (with the help of others) which looksup info in my listbox.

vb Code:

Private Const LB_FINDSTRING = &H18F
Private Const LB_FINDSTRINGEXACT = &H1A2
 
Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" _
(ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As Long
 
Private Sub txtLookup_Change()
    Dim strText$
    
    strText = Trim$(txtLookUp.Text)
    If strText <> "" Then
         lstRadioSerials.ListIndex = FindItem(lstRadioSerials, strText)
    Else
        MsgBox "No matching record found; Please check your criteria!", vbInformation + vbOKOnly, "No Record Match"
    End If
End Sub
 
Private Function FindItem(lst As ListBox, strText As String) As Integer
    
    Dim iIndex As Integer
    iIndex = SendMessage(lst.hwnd, LB_FINDSTRINGEXACT, -1, ByVal strText)
    FindItem = iIndex
End Function

This works for looking up the certain serials in my listbox, but what I would like to do is refine it a little more.

What I would like to add is this: when a user starts to type in the serial number and he types a wrong number (ie. he is looking for 1234 and he types 1224), then I would like an error message to state that there is no record with that serial number.

Right now when the user types the wrong number, the only thing that happens is that the highlighted part will not move anymore in the listbox.

I hope that I am not too confusing?

Private Sub Text1_KeyPress(KeyAscii As Integer)
Dim o2 As Object, o1 As Object,NotOnList as Boolean
Set o2 = Text1
Set o1 = WhateverListBoxName
If KeyAscii = 8 Then 'Backspace key
CheckComboInput o1, o2, KeyAscii
Exit Sub
End If


CheckComboInput o1, o2, KeyAscii,NotOnList:KeyAscii = 0
If NotOnLIst=True then …….give the MESSAGE or Whatever
End Sub

Public Sub CheckComboInput(c1 As Object, c2 As Object, N As_ Integer,NotOnList)
'c1 as object the object is the ListBox that holds the list eg SerialNumbers
'c2 as object is the Text control
' N as Integer is the Ascii val of the last character entered by the user
'This procedure is accessed by Textbox keypress proceedures to check if what
'is being entered is on the ListBox list
Dim L As Integer, S As Integer, T As String, N2 As Integer
N2 = N ' N2 holds keyascii so keyascii is returned unchanged as is on next line
If N = 8 Then N = 0
S = c2.SelStart: L = c2.SelLength: T = c2.Text
T = Left(T, S) & Chr(N) & Right(T, Len(T) - S)
S = S + 1: I = 0
Do While (I < c1.ListCount - 1) And StrComp(Left(T, S), Left(c1.List(I), S), vbTextCompare) <> 0
I = I + 1
Loop
If UCase(Left(T, S)) = UCase(Left(c1.List(I), S)) Then
T = c1.List(I): L = Len(T) - S
c1.Selected(I) = True
Else
For I = 0 To c1.ListCount - 1
If c1.Selected(I) = True Then
c1.Selected(I) = False: NotOnList=true
else
NotOnList=true
Next
T = Left(T, S): L = 0
End If
c2.Text = T: c2.SelStart = S: c2.SelLength = 1
N = N2
End Sub

dasjoe,

Thanks for the reply; I'll give your code a try.


Also, is there anyway that I can just add to the code that I am already using?

The CheckComboInput o1, o2, KeyAscii,NotOnList routine can be placed on a
module, just make sure it is public. You can then call it from any list box
keypress. It is basically an auto complete routine, it will complete the entry
if it is listed on the list box. The NotOnList returns true if as soon as a key is pressed that does not make up what ever is listed in the list box. Only use the
NotOnList if its needed otherwise use it as an autocomplete.

dasjoe,

I get an error in the following block of code:

vb Code:

S = c2.SelStart: L = c2.SelLength: T = c2.Text

Error: "Object doesnt support this property or method"

Do I need to reference this? Not sure what to do.

Thanks

Quote:

---

Originally Posted by cfd33

This works for looking up the certain serials in my listbox, but what I would like to do is refine it a little more.

What I would like to add is this: when a user starts to type in the serial number and he types a wrong number (ie. he is looking for 1234 and he types 1224), then I would like an error message to state that there is no record with that serial number.

Right now when the user types the wrong number, the only thing that happens is that the highlighted part will not move anymore in the listbox.

I hope that I am not too confusing?

---

A very simple solution for you is to throw away the listbox and the textbox, replace both of them with a single combobox.
A combobox has 2 parts, a listbox and a textbox. It allows user to select an item in the list, it also allow user to type in.
You can set MatchRequire to True, it will do the job for you and it also do autocomplete.

anhn,

Thanks for the reply, but I would like to keep my setup the way it is now (with the listbox and textbox).

Sorry, Missed KeyAscii = 0
also set objects reversed
Try now, I have amended
Also added Space Key provisions

The List Box can be invisible if you like or add code so double clicking the listbox item will populate the test box

Thanks,

I will try it when I get back to work on Monday.

dasjoe,

I get an error message at this code:

vb Code:

Private Sub txtLookup_KeyPress(KeyAscii As Integer)
    Dim o2 As Object, o1 As Object, NotOnList As Boolean
    Set o1 = lstRadioSerials
    Set o2 = txtLookup
    
    If KeyAscii = 8 Then 'Backspace key
        [COLOR="SeaGreen"]ChkListBox [/COLOR]o1, o2, KeyAscii <---Eror Here on ChkListBox!!
        Exit Sub
    End If
 
    
    ChkListBox o1, o2, KeyAscii, NotOnList: KeyAscii = 0
 
    
    If NotOnList = True Then
        Call MsgBox("No matching record found; Please check your criteria!", vbInformation + vbOKOnly, "No Record Match")
    End If
End Sub

"Argument not optional"

Also, if a person types a serial that is not in the db, then where would I put a msgbox telling the users that there is no serial number like that in the db?




dasjoe, I removed this part of the IF statement and now it allows backspace:

vb Code:

If KeyAscii = 8 Then 'Backspace key
        'ChkListBox o1, o2, KeyAscii
        Exit Sub
    End If

Is this ok to do?



Is this part the part of code that tells the user that there is no record match if they should type a serial that is not in the database?

vb Code:

If NotOnList = True Then
        Call MsgBox("No matching record found; Please check your criteria!", vbInformation + vbOKOnly, "No Record Match")
    End If

if it is, it is not working. (ie. 1234 and I type 1233, then I want a message box to appear stating that there is no serial like that)

____________________________________________________________________________________________________ ________________________________

Ahhh, never mind on the messagebox! I placed the code for the messagebox in the module instead of the Keypress event and now it works just fine.

The messagebox is better left where it is, as this provides flexibility.
The CheckListBox routine can be called from any text box/List Box combination. Good to have a flexible adaptable working routine that can be added to any project, as the message from message box may not always be the same let alone the same style.

However after checking the original code I provided the was an error

Missing end if onCheckComboBox

Also I Noted the Ascii =8 'Space Bar
incorrect, code is correct but Ascii 8 is backspace key. This line of code is required because it it isn't a backspace will invoke a not on list message.
so when a backspace is entered, also you can not deleted using backspace because after call the CheckCombo routine Ascii is set to 0 meaning no
backspace as backspace=8

I have re-supplied ammended code, Sorry for not checking and running the code earlier, but did not have time.

Private Sub Text1_KeyPress(KeyAscii As Integer)
Dim o2 As Object, o1 As Object, NotOnList As Boolean
Set o2 = Text1
Set o1 = List1
If KeyAscii = 8 Then 'Backspace key
CheckComboInput o1, o2, KeyAscii, NotOnList
Exit Sub
End If

CheckComboInput o1, o2, KeyAscii, NotOnList: KeyAscii = 0
If NotOnList = True Then
Dim msg As String, Style As String, Title As String
msg = " Item not listed on Data Base."
Style = vbInformation + vbOKOnly
Title = "Listing not found"
MsgBox msg, Style, Title
End If
End Sub

Public Sub CheckComboInput(c1 As Object, c2 As Object, N As Integer, NotOnList)
'c1 as object the object is the ListBox that holds the list eg SerialNumbers
'c2 as object is the Text control
' N as Integer is the Ascii val of the last character entered by the user
'This procedure is accessed by Textbox keypress proceedures to check if what
'is being entered is on the ListBox list
Dim L As Integer, S As Integer, T As String, N2 As Integer
N2 = N ' N2 holds keyascii so keyascii is returned unchanged as is on next line
If N = 8 Then N = 0
S = c2.SelStart: L = c2.SelLength: T = c2.Text
T = Left(T, S) & Chr(N) & Right(T, Len(T) - S)
S = S + 1: I = 0
Do While (I < c1.ListCount - 1) And StrComp(Left(T, S), Left(c1.List(I), S), vbTextCompare) <> 0
I = I + 1
Loop

If UCase(Left(T, S)) = UCase(Left(c1.List(I), S)) Then
T = c1.List(I): L = Len(T) - S
c1.Selected(I) = True
Else
For I = 0 To c1.ListCount - 1
If c1.Selected(I) = True Then
c1.Selected(I) = False: NotOnList = True
Else
NotOnList = True
End If
Next
T = Left(T, S): L = 0
End If

c2.Text = T: c2.SelStart = S: c2.SelLength = 1
N = N2
End Sub

dasjoe,

I must not understand about the msgbox; when I try the code like you have it below:

vb Code:

If NotOnList = True Then
        Dim msg As String, Style As String, Title As String
        msg = " Item not listed on Data Base."
        Style = vbInformation + vbOKOnly
        Title = "Listing not found"
        MsgBox msg, Style, Title
    End If

it does not fire, but when I place the msgbox in the module, then it works great.

What am I doing wrong?

This is the whole code for the Keypress:

vb Code:

Private Sub txtLookup_KeyPress(KeyAscii As Integer)
    Dim o2 As Object, o1 As Object, NotOnList As Boolean
    Set o1 = lstRadioSerials
    Set o2 = txtLookUp
    
    If KeyAscii = 8 Then 'Backspace key
        ChkListBox o1, o2, KeyAscii, NotOnList
        Exit Sub
    End If
 
    
    ChkListBox o1, o2, KeyAscii, NotOnList: KeyAscii = 0
    
    
    If NotOnList = True Then
        Dim msg As String, Style As String, Title As String
        msg = " Item not listed on Data Base."
        Style = vbInformation + vbOKOnly
        Title = "Listing not found"
        MsgBox msg, Style, Title
    End If
 
End Sub

I have just did a copy and past straight from this site onto a new VB6
project, added a textbox named Text1 and a ListBox name List1
Left code as is and works fine. So ??? suggest you do the same on a new
project. Do you have VB6 ??? By doing this you can prove at least this part
of the coding.

Cheers

dasjoe,

I will give what you said a try. Yes, I have vb6.

I really appreciate all of your help!!

I am still a newbie at this vb6, so please excuse me.

No problem, we all start somewhere

Quote:

---

Originally Posted by anhn

You can set MatchRequire to True, it will do the job for you and it also do autocomplete.

---

MatchRequire is not available in VB6.0