I've been working on a database project for my database classes but I am stuck at the most ridiculous thing; clearing a ComboBox of values in one of my forms. I've been trying to figure out how to do this for hours, but I cannot do it. The ComboBox has a control source linking it to an attribute which is a data type of Date/Time, formatted as short time (hh:ss)
I've tried a few things, but nothing really works, like:
ComboBox1.Items.Clear()
but that won't work because the Items property doesn't even exist in Access's version of VB, I run Access 2019 which has VB for Apps 7.1. Most things on the Internet suggest this approach.
I've also tried a rather quirky method:
index = Combo39.ListIndex
Dim indexc As Integer
indexc = 0
If index = -1 Then
'do nothing because its already empty
Else
Do
Combo39.RemoveItem (indexc)
If indexc = index Then
Exit Do
End If
indexc = indexc + 1
Loop
End If
This code basically loops until the number of times the loop has cycled is the same as the index number of the combo box. I am not sure why, but it doesn't work. It does appear to remove some things, but not everything. It's as if the loop breaks early.
I am in huge need of help, I've run completely dry on how to do this one simple thing. I would greatly appreciate help, thank you.
As your combobox seems to have a list of values as its rowsourcet, all you need is to clear this:
Me!Combo39.RowSource = ""
Related
I'm seeing the good old "System.Runtime.InteropServices.COMException HResult=0x80004005 Message=Error HRESULT E_FAIL has been returned from a call to a COM component" error when attempting to find an item via a for loop as shown below:
For i = 1 to itemList.Count
oObject = itemList.Item(i)
Next
But not if I hardcode the index, this finds item 1 without issue:
oObject = itemList.Item(1)
Obviously I don't want to do that and need to search through all the objects in my "itemList" to find the one I'm looking for.
I'm being intentionally vague because the software I'm working in is Dassault 3D Experience but am writing macros for it through Visual Studio 2017. I'm not sure where to even start debugging this sort of issue so any suggestions would be appreciated. Thanks.
Edit: adding full code of what I'm trying to do here (find an object, display its name, also select it on screen to double check. I will later add a check to make sure the object found in each loop is really what I'm looking for). All variables have been declared before this section.
selactive = CATIA.ActiveEditor.Selection
selactive.Clear()
product1Service = CATIA.ActiveEditor.GetService("PLMProductService")
oRootOcc = product1Service.RootOccurrence
cVPMOccurrences = oRootOcc.Occurrences
For i = 1 to cVPMOccurrences.Count
oVPMOccurrence = cVPMOccurrences.Item(i)
selactive.Add(oVPMOccurrence)
MsgBox(oVPMOccurrence.Name)
Next
The line that fails is oVPMOccurrence = cVPMOccurrences.Item(i)
Can you do something like this with a For Each loop?
For each oVPMOccurrence as oRootOcc.Occurrence in cVPMOccurrences.Items
selactive.Add(oVPMOccurrence)
MsgBox(oVPMOccurrence.Name)
Next
Using a For Each means you don't have to worry at all about the index
Not sure what the type of oVPMOccurrence is as you haven't specified
Most indexes in .net are zero base. I don't know what itemList is but I suspect the index of the first item is 0.
For i = 0 to itemList.Count - 1
oObject = itemList.Item(i)
Next
Not sure why you want to overwrite the value of oObject on every iteration.
I'm trying to save the values of data that have been input into my form. There are a total of about 50 different fields to save across 5 different agents, so I loaded the data into arrays.
I've tried saving the fields in a loop, but it doesn't seem to work in a loop, only if each field has a separate line, which is a lot of code and messy. The Ag1Name, Ag2Name and Ag3Name are the names of my textboxes that the user enters to populate the form.
Sub LoadAndSaveData()
NumberofAgents = 3
Dim AgentName(3) as String
AgentName(1) = Ag1Name.Value
AgentName(2) = Ag2Name.Value
AgentName(3) = Ag3Name.Value
For Count = 1 To NumberOfAgents
With ActiveDocument.CustomDocumentProperties
.Add Name:="AgentName" & Count, LinkToContent:=False, Value:=AgentName(Count), Type:=msoPropertyTypeString
End With
Next Count
End Sub
The data doesn't get saved to the Custom Document Properties when the code is set up in a loop like the above. Since there are so many values to save and all the data is already in arrays, I would much prefer to use a loop rather than write out a separate line of code for all ~50 of the values. It does seem to work when each field is saved in a separate line of code.
I think this would probably get what you want. You don't really need to count the document properties first, only increment with the ones you want to update. Hopefully the only document properties you want contain the name AgentName in it.
ReDim AgentName(0) As String
Dim P As Long
For Each c In ThisDocument.CustomDocumentProperties
If InStr(1, c.Name, "AgentName", vbTextCompare) > 0 Then
ReDim Preserve AgentName(P)
AgentName(P) = c.Value
P = P + 1
End If
Next c
As a guest I cannot post a comment here, but the code you gave works OK here.
However, there is a problem with creating legacy custom document properties programmatically, because doing that does not mark the document as "changed". When you close the document, Word does not necessarily save it and you lose the Properties and their values.
However, if you actually open up the Custom Document Property dialog, Word does then mark the document as "changed" and the Properties are saved.
So it is possible that the difference between your two scenarios is not the code, but that in one scenario you have actually opened the dialog box to check the values before closing the document and in the other you have not.
If that is the case, here, I was able to change this behaviour by adding the line
ActiveDocument.Saved = False
after setting the property values.
If you do not actually need the values to be Document Properties, it might be better either to use Document Variables, which are slightly easier to use since you can add them and modify them with exactly the same code, or perhaps by storing them in A Custom XML Part, which is harder work but can be useful if you need to extract the values somewhere where Word is not available.
You can make this even easier by looping the controls on the UserForm, testing whether the control name contains "Ag" and, if it does, create the Custom Document Property with the control's value - all in one step.
For example, the following code sample loops the controls in the UserForm. It tests whether the controls Name starts with "Ag". If it does, the CustomDocumentProperty is added with that control's value.
Sub LoadAndSaveData()
Dim ctl As MSForms.control
Dim controlName As String
For Each ctl In Me.Controls
controlName = ctl.Name
If Left(controlName, 2) = "Ag" Then
With ActiveDocument.CustomDocumentProperties
.Add Name:=controlName, LinkToContent:=False, value:=ctl.value, Type:=msoPropertyTypeString
End With
End If
Next
End Sub
I feel a little stupid... I just realized that the reason that the code wasn't working was that the variable NumberofAgents was not being calculated correctly elsewhere in my code. I've got it working now. Thanks for your thoughts!
I would like to have a subroutine in VBA that conditionally changes the Enabled property of each of 20+ buttons on a form via iteration rather than code them all by hand. These buttons are named similar to tables that they process. For example: A table to process is called "CUTLIST"; its corresponding button is called "but_CUTLIST". There is another table that holds the list of tables to be processed (used for iteration purposes in other subs).
What I have so far...
Private Sub txt_DataSet_GotFocus()
Dim sqlQry as String
Dim butName As String
Dim tableList As Recordset
Dim tempTable As Recordset
Set tableList = CurrentDb.OpenRecordset("TableList") 'names of tables for user to process
tableList.MoveFirst 'this line was corrected by moving out of the loop
Do Until tableList.EOF
sqlQry = 'SQL query that determines need for the button to be enabled/disabled
Set tempTable = CurrentDb.OpenRecordset(sqlQry)
If tempTable.RecordCount > 0 Then
'begin code that eludes me
butName = "but_" & tableList!tName
Me(butName).Enabled False
'end code that eludes me
End If
tableList.MoveNext
Loop
End Sub
If I remember correctly, JavaScript is capable of calling upon objects through a variable by handling them as elements of the document's object "array." Example: this[objID]=objVal Is such a thing possible with VBA or am I just going about this all wrong?
Viewing other questions... is this what's called "reflection"? If so, then this can't be done in VBA. :(
In case more explanation helps to answer the question better... I have a utility that runs SQL queries against a pre-defined set of tables. Each table has its own button, so that the user may process a query against any of the tables as needed. Depending on circumstances happening to data beforehand, any combination of the tables may need to be queried via pressing of said buttons. Constantly referring to the log, to see what was already done, gets cumbersome after processing several data sets. So, I'd like to have the buttons individually disable themselves if they are not needed for the currently focused data set. I have another idea on how to make that happen, but making this code work would be faster and I would learn something.
I'm not an expert on VBA, but I would re-arrange the code to take advantage of the fact that you can iterate through the control collection in the user form
Something like this:
Dim ctrl as Control
For Each ctrl in UserForm1.Controls
If TypeName(ctrl) = "Button" Then
ctrl.Enabled = True
End If
Next
You can pass the button name to some other function (from this loop) to determine whether the button in question should be enabled / disabled.
This may be a simple question, but I have searched quite a few sites and have tried a few of my own ideas and I still cannot seem to find a simple way to get Visual Studio to replace all of the listbox items with the string of nothing with some other text.
Using things such as :
For Each S In ListBox1.Items
S.Replace("", "Not Blank")
Next
Shows:
Error
String cannot be of zero length
Which is quite annoying because the actual listbox item contains no text.
This seems to be one of the easiest things I have ever encountered while using vb.net. But it now seems very hard for what should be a simple command.
A couple of problems. The Replace function returns a new value, and you promptly ignore it. Second, you can't really modify the collection as you For-Each over it, so a For-Loop would be more appropriate.
I think you want something like this instead:
For i As Integer = 0 To ListBox1.Items.Count - 1
If String.IsNullOrEmpty(ListBox1.Items(i).ToString) Then
ListBox1.Items(i) = "Not Blank"
End If
Next
I am currently half way through a project where I am migrating data from an ancient Adobe Workflow server using Visual Basic and COM.
I have hit a bit of a brick wall really as I am trying to perform a simple while loop that counts the number of records in a recordset, and I keep getting this error...
"An unhandled exception of type 'System.Runtime.InteropServices.COMException' occurred in microsoft.visualbasic.dll
Additional information: Unspecified error"
There is little to no documentation to help me online so I am hoping there is some sort of VB wizard/veteran that can point me in the right direction.
I have set the record as a global variable like so...
Dim record As New EPSDK.Recordset
I have then tried...
Dim recCount As Integer = 0
Do Until record.EOF
recCount += 1
Loop
This...
Dim recCount As Integer = 0
Do While Not record.EOF
recCount += 1
Loop
This...
Dim recCount As Integer = 0
Do
recCount += 1
Loop Until record.EOF
And lots of other variations, but still cannot seem to source the problem. There are no code errors, nothing comes up in the console, and I just keep getting that message back.
Can anyone spot what I am doing wrong? Thanks
Ok, I've looked up the documentation for EPSDK. For those who are unaware (as I was), it's an object collection from Adobe for manipulating COM data. It's basically the most popular functionality in ADO.
MoveFirst, as its name suggests, moves to the first record in a recordset. There doesn't appear to be any such method supported by the EPSDK Recordset object. Since you can use the Move method to do the same thing, it isn't needed. In either case, you don't need to use it to move to the end of the file.
What you're doing wrong is expecting that you can increment a variable called recCount that you made up and the recordset cursor will magically move along. Doesn't happen. As you say, the doc is insubstantial, but you probably need to use MoveNext. Here's a cheat sheet you can use to look up what's supported.
Also, you need to specify a connection, open it, point the recordset to the open connection, and open the recordset. I would suggest that you familiarize yourself with ADO (NOT ADO.Net! Not the same thing), upon which this is clearly based. There's much more documentation, and it should apply fairly well. Read up on Connections and Recordsets in particular.
Now, your loops do pretty much the same thing. While Not is the equivalent of Until. However, if you put the while/until condition after the Do statement, you won't enter the loop unless the condition is met. If you put it after the Loop statement, you will always run the loop at least once. In this case, you should put "Do Until myRecordset.EOF", because then if the recordset is empty, you won't go into the loop.