MikeDTE
asked on
Displaying Global Variables
In my Delarations Module i have set a Global variable thus:
Global strEventSummary as String
This variable will be shown in various forms and updated with the number of Bookings, Participants, Observers and Confirmed Bookings as varions procedures change these elemenst. Like taking a new booking, a payment being made (i.e. effects Confirmed Bookings), a cancellation being made etc. etc. All I need to do is change the Global value and as each form is opened the Event Summary is always up-to-date.
In the Bookings form I have a Textbox 'txtEventSummary" with the Control Source = strEventSummary
But this displays an Error saying that the textbox has an "Invalid Control Property"
Can this be resolved?
Also in the Bookings form if a new booking is made I will update the strEvent Summary Global variable but can I just then refresh the display of the txtEventSummary textbox without refreshing the whole form.
Thanks in advance of any help
Global strEventSummary as String
This variable will be shown in various forms and updated with the number of Bookings, Participants, Observers and Confirmed Bookings as varions procedures change these elemenst. Like taking a new booking, a payment being made (i.e. effects Confirmed Bookings), a cancellation being made etc. etc. All I need to do is change the Global value and as each form is opened the Event Summary is always up-to-date.
In the Bookings form I have a Textbox 'txtEventSummary" with the Control Source = strEventSummary
But this displays an Error saying that the textbox has an "Invalid Control Property"
Can this be resolved?
Also in the Bookings form if a new booking is made I will update the strEvent Summary Global variable but can I just then refresh the display of the txtEventSummary textbox without refreshing the whole form.
Thanks in advance of any help
ASKER
Thanks for the guidance - I can see how that works.
Updating the variable depends which form I am in. All the elements of strEventsSummary are fields in the Events table. So in the Events form where the Events table is the Record Source it is easy:
strEventSummary = jdwe_Desc & " " & jdwe_StartDate & " " & jdwe_NoPlaces & " " & jdwe_NoBookings etc
In other forms I have DLookups in Functions to get the data from the Bookings table
Function Build_No_Bookings(lngEvent ID As Long, strStatus As String)
'Build Bookings total: condition: a booking record matching the EventID and without a
'CANX status (has "OK" status)
Build_No_Bookings = DCount("*", "tJDWBookings", "jdwb_Event=" & lngEventID & " And jdwb_Status=" &_
Chr(34) & strStatus & Chr(34))
End Function
and store them in local variables and then use these local variables to rebuild strEventSummary in the same fashion as above.
Updating the variable depends which form I am in. All the elements of strEventsSummary are fields in the Events table. So in the Events form where the Events table is the Record Source it is easy:
strEventSummary = jdwe_Desc & " " & jdwe_StartDate & " " & jdwe_NoPlaces & " " & jdwe_NoBookings etc
In other forms I have DLookups in Functions to get the data from the Bookings table
Function Build_No_Bookings(lngEvent
'Build Bookings total: condition: a booking record matching the EventID and without a
'CANX status (has "OK" status)
Build_No_Bookings = DCount("*", "tJDWBookings", "jdwb_Event=" & lngEventID & " And jdwb_Status=" &_
Chr(34) & strStatus & Chr(34))
End Function
and store them in local variables and then use these local variables to rebuild strEventSummary in the same fashion as above.
ASKER
should have said DLookup and DCount depending on the format of the data
ASKER CERTIFIED SOLUTION
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Alternatively, you can save the value to a custom database property; they can be displayed in textboxes, using this syntax:
=GetProperty("PropName", "")
Unlike global variables, values in custom db properties persist through closing and reopening Access, which is convenient in some cases.
=GetProperty("PropName", "")
Unlike global variables, values in custom db properties persist through closing and reopening Access, which is convenient in some cases.
Option Compare Database
Option Explicit
Private dbs As DAO.Database
Private prp As DAO.Property
Private prps As DAO.Properties
Private strPropertyName As String
Private strPropertyValue As String
Private lngDataType as Long
Private varPropertyValue As Variant
Public Sub SetProperty(strName As String, lngType As Long, _
varValue As Variant)
'Created by Helen Feddema 2-Oct-2006
'Modified by Helen Feddema 2-Oct-2006
'Called from various procedures
On Error GoTo ErrorHandler
'Attempt to set the specified property
Set dbs = CurrentDb
Set prps = dbs.Properties
prps(strName) = varValue
ErrorHandlerExit:
Exit Sub
ErrorHandler:
If Err.Number = 3270 Then
'The property was not found; create it
Set prp = dbs.CreateProperty(Name:=strName, _
Type:=lngType, Value:=varValue)
dbs.Properties.Append prp
Resume Next
Else
MsgBox "Error No: " & Err.Number _
& " in SetProperty procedure; " _
& "Description: " & Err.Description
Resume ErrorHandlerExit
End If
End Sub
Public Function GetProperty(strName As String, strDefault As String) _
As Variant
'Created by Helen Feddema 2-Oct-2006
'Modified by Helen Feddema 2-Oct-2006
'Called from various procedures
On Error GoTo ErrorHandler
'Attempt to get the value of the specified property
Set dbs = CurrentDb
GetProperty = dbs.Properties(strName).Value
ErrorHandlerExit:
Exit Function
ErrorHandler:
If Err.Number = 3270 Then
'The property was not found; use default value
GetProperty = strDefault
Resume Next
Else
MsgBox "Error No: " & Err.Number _
& " in GetProperty procedure; " _
& "Description: " & Err.Description
Resume ErrorHandlerExit
End If
End Function
Public Function ListCustomProps()
'Created by Helen Feddema 3-Oct-2006
'Modified by Helen Feddema 3-Oct-2006
'Lists DB properties created in code (as well as built-in properties)
On Error Resume Next
Set dbs = CurrentDb
Debug.Print "Database properties:"
For Each prp In dbs.Properties
Debug.Print vbTab & prp.Name & ": " & prp.Value
Next prp
End Function
==================================
Usage examples:
Private dbs As DAO.Database
Private prp As DAO.Property
Private prps As DAO.Properties
Private lngDataType As Long
Private strPropertyName As String
Private strPropertyValue as String
Private varPropertyValue As Variant
Date
====
strPropertyName = "PropName"
lngDataType = dbDate
Call SetProperty(strPropertyName, lngDataType, dteStart)
GetStartDate = CDate(GetProperty("PropName", ""))
Text
====
strPropertyName = "PropName"
strPropertyValue = CStr(cbo.Value)
lngDataType = dbText
Call SetProperty(strPropertyName, lngDataType, _
strPropertyValue )
strDocsPath = GetProperty("PropName", "")
Long
====
strPropertyName = "PropName"
lngDataType = dbLong
Call SetProperty(strPropertyName, lngDataType, lngID)
lngID = CLng(GetProperty("PropName", ""))
Integer
=======
strPropertyName = "PropName"
lngDataType = dbInteger
Call SetProperty(strPropertyName, lngDataType, intMonth)
intID = CInt(GetProperty("PropName", ""))
Saving to a custom property from a control's AfterUpdate event
==============================================================
Private Sub txtDate_AfterUpdate()
'Created by Helen Feddema 2-Sep-2009
'Last modified 2-Sep-2009
On Error GoTo ErrorHandler
If IsDate(Me![txtDate].Value) = True Then
dteSingle = CDate(Me![txtDate].Value)
strPropertyName = "SingleDate"
Call SetProperty(strName:=strPropertyName, _
lngType:=dbDate, varValue:=dteSingle)
End If
ErrorHandlerExit:
Exit Sub
ErrorHandler:
MsgBox "Error No: " & Err.Number & "; Description: " & _
Err.Description
Resume ErrorHandlerExit
End Sub
You would need to use a 'Get' function to set a controlsource..
Function GetvarES()
getvarES= strEventSummary
End function
You can set the controlsource to
=getvares()
Alternatively use the form current event procedure to set an unbound control (no controlsource)
me.txtEventSummary = strEventSummary
As for your second Q, how are you updating the variable?