I have an Access database in which I store some data, and that database has 13 tables plus a reference one.
I want to make a form where there are several checkboxes and a button. Each chekbox represents a table, and every table selected will be joined inside a query writen in VBA, associated with the button click.
I've already made the same thing in Excel, and it works perfectly, so the only problem here is that I don't know how to access the checkbox value and use an IF condition to get the correct SQL string.
To make it clear, here I have a IF statement for one of the checkboxes in Excel:
If Range("B8").Value = True Then
CTODStrc = ", CTODTYPE, CTOD.TEMPERATURE, VALIDITY, DELTAR, DELTAL"
CTODStr = " JOIN CTOD ON REF.ID = CTOD.REF_ID"
JoinStr = JoinStr & CTODStr
Columns = Columns & CTODStrc
End If
SQLStr = RefStr & JoinStr 'Query sentence
The SQLStr is the query text, and it has a prior "select" string which is added.
In Excel, the cell B8 was associated with the checkbox, but in Access I have to make this condition using a checkbox thats in the form - how can I do it?
I've tried Me.CbName.Value, but it says the command is not supported.
Thank you.
The checked state of a checkbox is given by the Value property of the checkbox control. This property may be 0 (unchecked), -1 (checked), or Null for a block-filled triple state checkbox.
Since the Value property is the default property for a checkbox, and assuming you are not using a triple state checkbox, you should be able to use simply:
If CBName Then
' Do stuff
End If
Related
In my Access Form I have a Text Box that should have this value:
SELECT [QueryOne].[Company] FROM [QueryOne] WHERE ([QueryOne].[ID] = "1000"
So, I wrote in the ControlSource of this textbox the following string:
= ( SELECT [QueryOne].[Company] FROM [QueryOne] WHERE ([QueryOne].[ID] = "1000" )
but the result that I get is that the textbox.value is #Name?. Maybe this string should not be in the ControlSource?
Use DLookup:
=DLookup("[Company]"), "[QueryOne]", "[ID] = '1000'")
or more probably ID isn't a text column, then
=DLookup("[Company]"), "[QueryOne]", "[ID] = 1000")
Access text boxes cannot be directly used to execute SQL. You can however call a function from the text box by setting it as the Control Source and display the result. Access offers a number of functions which can be used to retrieve data from a database. DlookUp should do what you require here:
=DLookUp("[Company]","[QueryOne]","ID='1000'")
You probably want to be able to enter the company ID to return the name. To do that, change the function to refer to another input textbox on your form like so (obviously just change the form and text box names to match your elements):
=DLookUp("[Company]","[QueryOne]","[ID]='" & [Forms]![Form1].[txtCompanyID].[Value] & "'")
Of course, if you are doing anything more than the most trivial of lookups, the correct way of doing this would be to set up a Record Source for the form and set the text box Control Source to a field from this dataset.
I've managed to successfully build a combo-box that will allow a user to select a record from a list to get an ID from a table. With the table I'm currently working with running to around 60,000 records, it's not realistic to use this method to find the record.
What I want the user to be able to do is enter a name in a text box, and a combo box be populated with the relevant records from the table where one of the fields matches that. So if the user entered 'This' into the text box, the combo box would present records where the field had 'This', 'This and That' and 'this'. It would not present the record that only had 'That' in the field.
Lets say the Text box is called 'txtBox', the combo-box is called 'comBox' and the field in the linked SQL Server table 'LinkedTable' is called 'SearchField'
I would suggest you not use the combo box. Just have a text box in which the user can type in a few characters and hit enter key.
You THEN display a “list” of results that allows the user to select and click on any of the results to “edit” or “view” the given row of data.
In the following screen shot we working with a VERY small table of 500,000 rows. We looking for smith, so we just type in smi and hit enter. The results are displayed instant, and at that point the user can type in “first name” or just a few chars of first name and further drill down and filter.
The form looks like this:
The code in the after update event of the text box is simply:
Dim strSQL as String
strSQL = "select * from tblCustomers where LastName like '" & me.TextSearch & "*’"
me.RecordSource = strSQL
So very little code is required. You could I suppose fill in the results to a combo box, but then the user has to type into a box, then select something from a combo box and then somehow you bring up that record for editing. That’s like 3+ steps for the user.
Just use what Google or most accounting or darn near any computer software does:
A simple text box – you type in a few characters and when they hit enter the results are displayed for the user to pick.
Note in above the user can click on the “glasses” icon button to launch a form that displays the single record. The code behind that button is:
Docmd.Openform "frmEditDetails",,,"ID = " & ME!ID
I went down a different route to the suggested option in the other answer. This met my needs more accurately and might help someone with a similar issue.
First, I amended the query on the Combo box so that it used the value in the text box as a criteria for one of the fields.
In the Criteria for the 'SearchField' within 'LinkedTable' I entered:
Like "*" & [forms]![*FormName*]![txtBox] & "*"
This will restrict the results in comBox to those where the SearchField contains the value entered into txtBox. This doesn't update dynamically however and will only update after the first value entered into txtBox.
To get around this problem, I added the following to the 'On Get Focus' event for comBox
Private Sub comBox_GotFocus()
Dim ctlCombo As Control
' Return Control object pointing to a combo box.
Set ctlCombo = Forms!FormName!comBox
' Requery source of data for list box.
ctlCombo.Requery
End Sub
This will force the combo box to run the query again, using the current value in txtBox, each time it is 'clicked on'
As a result, I get the restricted list of values in the combo box that I need and allows the user to 'search' for a record that can then be used for creating a new record on a form.
I have a combobox on a form and I'm trying to programmatically select one of the items in the combobox after I've run my SQL query on the access database.
I use the following code to iterate over the items and set the selected item:
'Make the appropriate location appear in the combobox
For i = 0 To cboLocations.ListCount - 1
If Me.cboLocations.Column(0, i) = locindex Then
Debug.Print "locindex: " & locindex & vbCrLf & " Me.cboLocations.Column(0, i):" & Me.cboLocations.Column(0, i)
Me.cboLocations.SetFocus
Me.cboLocations.ListIndex = i '<<< error 2115
Exit For
End If
Next i
As indicated, I keep getting error 2115: The macro or function set to the BeforeUpdate or ValidationRule property for this field is preventing Access from saving the data in the field.
Neither of the properties for this combobox indicated in the error message is set to anything. So I'm stuck. Please advise.
programmatically select one of the items in the combobox
The way I've always done that is to assign something to the combo's Value like this ...
Me.MyCombo.Value = "target text"
Value comes from the Bound Column of the combo's selected row. (You can find Bound Column on the Data tab of the combo's property sheet.) Conversely, assigning "target text" to Value selects the matching row.
In your situation, I think you're trying to select the combo row which contains the same text as your locindex variable. And if that is true, then I think all you need is this ...
Me.cboLocations.Value = locindex
As far as when you do that, neither Before Update nor Validation Rule seems like the right choice to me. I suggest you do it from whatever code you're using to run your "SQL query on the database", immediately after the query.
You are probably colliding with the BeforeUpdate event.
Try using AfterUpdate.
I have a database with information about visitors to our department. Here is my setup: A user selects a visitor name from a listbox. Access assigns the values from that visitor's record to temporary variables and opens an unbound form where those variables are the default values in the text field. When a user changes a value in a textbox, an After_Update event uses SQL to update the corresponding field in that visitor's record and assigns the new value to the temporary variable.
After_Update example:
Dim strRUN As String
strRUN = updateVisitorOnDirty(Me.txtVisitorTravelMethod, "VisitorTravelMethod", 1)
HideWarnings (strRUN)
TempVars!strVisitorTravelMethod = Nz(Me.txtVisitorTravelMethod.Value, "")
"updateVisitorOnDirty" is a function that returns SQL to update a field (specified in second argument) in the table with visitor information with the first argument. (The number at the end is says it's a string.) "HideWarnings" turns warnings off, executes the SQL, and then turns warnings back on.
My problem:
When a user clears a textbox, the After_Update event makes the textbox revert to it's previous value.
I thought at first that maybe the unbound textbox was reverting to its default value when it was cleared, but I put a breakpoint in the sub that fires during After_Update:
If I change a value in mytextbox from a to b, debug.print shows the value of mytextbox as b. If I change a value in mytextbox from a to (blank, or empty string), debug.print shows the value of mytextbox to still equal a.
My workaround has been to include a little "x" near the textbox that the user can click to 1)clear the textbox, 2)update the temporary variable, and 3)update the table. It works fine, but it seems like there should be a better way. Help?
Please let me know if you need any other information or if I should otherwise re-word this. I come here all the time for answers, but this is the first time I've actually submitted my own question. Thank you!
(I edited this to make the code show up correctly...didn't leave a line before.)
I figured out that the unbound textboxes were reverting to their default value when a user tried to make them blank. To stop them from doing this, I put this in the AfterUpdate of the textboxes:
Call ResetDefault(Me.textbox1.Text, Me.textbox1)
And defined the function:
Public Sub ResetDefault(ByVal strChange As String, ByRef txtCurrent As TextBox)
If Nz(strChange, "") = "" Then txtCurrent.DefaultValue = ""
End Sub
That is, if a user cleared a textbox, the default value of that textbox was set to "", allowing the textbox to actually go blank.
I think the best approach is to scrap the after_update event on your text boxes and instead either put a save button on your unbound form so that all updates are written in one pass, or capture the forms closing event and update your table then.
This is the advantage of using unbound forms, you do not have to comit data until you are absolutely ready to, but with using an after_update event you are almost mimic-ing the behaviour of a bound form.
I have a combo box and several text boxes on a form. When I select a value from the combo box I want it to run a query based on that value and populate the text boxes with the data returned by the query. The query should only return one record and the textboxes correnspond to different columns in that record.
I have this code:
Private Sub cbo_equip_loc_Change()
Dim location As String
Me.cbo_equip_loc.SetFocus
location = DLookup("NAME", "Query1", "position = '" & Me.cbo_equip_loc.SelText & "'")
Me.Text51.SetFocus
Me.Text51.Text = location
End Sub
But I get this error: "This property is read-only and can't be set"
Any ideas?
Solved: Im an idiot.
I had some value in the Control Source from something I was trying to do before. Removed that and it worked!
There is no need to do this:
Me.Text51.SetFocus
Me.Text51.Text = location
it is true that the text property is only available when the control has the focus, but the value property is available without any focus, or Access VBA is quite happy with just the name of the control:
Me.Text51.Value = location
Or
Me.Text51 = location
Textbox Text51 is locked, set property Locked to False.