I'm working on an Access 2007 database and I'm having a problem with a query.
I have a table named Vehicles, which contains data such as ID, license plate and fuel type for each vehicle in it.
I'm trying to make a query which will populate a combobox in a Form with each vehicle's fuel type, based on the license plate chosen by the user beforehand.
The thing is, we have some some cars that work with two types of fuel and I cant' find a way to display them separately in the combobox.
So far it kinda works, code follows:
CheckDiesel: IIf([Diesel]="Yes";"Diesel";IIf([Gasoline] AND [Ethanol]="Yes";"Gasoline"+ "Ethanol";IIf([Ethanol]="Yes";"Ethanol";IIf([Gasoline]="Yes";"Gasoline";""))))
If you look at the second IIf, I have a condition for a bi-fuel car. I want to display Gasoline and Ethanol separately, each one in a row.
I've tried using "&Chr(10) Chr(13)&" and "\r\n" but I had no success so far.
Can anyone help me?
Storing multiple pieces of data in a single field rarely ends well. A few options I see
A series of binary fields for gasoline type. So you'd have a True/false for gasoline, ethanol, and diesel. This is easy to show with checkboxes on the form.
If you know there will only be certain combinations, like if there will not be a 'diesel and ethanol' without gasoline, you can build it as a single value combobox.
You will probably need some VBA to do what you need to do. Try something like this:
Dim R as String
R=""
if (Me.Diesel) then R = R & "Diesel;"
if (Me.Gasoline) then R = R & "Gasoline;"
… {add any other types of fuel}
Me.MyComboBox.Rowsource = R
Me.MyComboBox.Requery
This can be added tot he form's OnCurrent event so it will update the combo box every time a new record is displayed.
If your form does not include the various fuel types as fields, either add them as hidden fields or use DLookup to read them off the table.
Related
I have a field with a customer ID that should be in the format of C0000000001, where it has a letter at the start and up to 10 numbers after the letter with leading zeros between the letter and the number. I want the users to be able to put in C1 and have the table save C0000000001 or C1234 and have the table save C0000001234.
I want the restriction to be on the hard data in the table. The table should contain the full customer ID but I only want the users to have to enter the C and the number of the customer when entering/searching for customers. I am using Access 2010.
I believe that the first character will always be a C, but either way, it would only be one alpha character if it wasn't.
I understand what you are saying, but the majority of the data (thousands of records) are going to be from another system that stores them that way. Doing it this way limits my margin of error. Otherwise, exports from the other system will need to be manually changed prior to being imported into the database and vice versa.
Searching would only be on existing records that will be saved in the C0000001234 format, but I would like user to be able to omit the leading zeros when entering the search criteria.
This question, combined with your previous question here, suggest to me that you are trying very hard to have the data structure in your Access database exactly match the legacy system from which you receive bulk updates. That may not be necessary, or even desirable.
For example, instead of maintaining the CustomerId as Text(11) (as in the old system) you could store it in your Access database as
CustomerIdPrefix: Text(1), and
CustomerIdNumber: Long Integer or perhaps Decimal if the numeric part really can exceed 2,147,483,647
Your Customers table in Access could also include a calculated field named CustomerId as
[CustomerIdPrefix] & Right("0000000000" & [CustomerIdNumber], 10)
to give you a single 'C0000012345' value for display purposes.
For searching, your form could have a Text Box for the Prefix (default value: 'C') and another text box for the numeric part. The search could then use a condition like
[CustomerIdPrefix] = txtPrefix.Value AND [CustomerIdNumber] = txtNumber.Value
or, if the user wanted to create a Filter on the Form (or Datasheet View) it would probably be sufficient to just filter on the number part.
If you ever needed to feed information back to the legacy system you could just export a query that includes the [CustomerId] calculated field (and omits [CustomerIdPrefix] and [CustomerIdNumber]) and you'd be fine.
My suggestion would be to use forms with associated queries using the FORMAT function.
You do need to clarify where you want this implemented, but I'm going to assume you have a table set up and that you would like to be able to enter/search data from a form.
I'll create one form for input frmAdd. For the input form, I created a query that would run when a button on the form was pressed. Add two text boxes newID and newOther to the forms which are unbounded but which the user can use to enter data. The query will then pull that data and append it to your table in an altered format. Here's the SQL for that query:
INSERT INTO Customers ( [Customer ID], [Other Field] )
SELECT Left([Forms]![frmAdd]![newID].[value],1)
& Format(Right([Forms]![frmAdd]![newID].[value],Len([Forms]![frmAdd]![newID].[value])-1),"0000000000")
AS Expr1, Forms![frmAdd]!newOther AS Expr2
FROM Customers;
I'm not sure exactly what search functionality you're looking for, but this query would pull up the record data matching that of a frmSearch with a textbox search which would have the format C### or whatever entered in:
SELECT Left([Customers].[Customer ID],1) & Replace(LTrim(Replace(Right([Customers].[Customer ID],9),'0',' ')),' ','0')
AS Expr1, Customers.[Other Field]
FROM Customers
WHERE (((Customers.[Customer ID])=Left([Forms]![frmSearch]![search].[value],1)
& Format(Right([Forms]![frmSearch]![search].[value],Len([Forms]![frmSearch]![search].[value])-1),"0000000000")));
Applying the input mask is just a way to ensure that your data is correct. If you feel the need to use one, go to the table in Design View and click on the Data Type box for the customer ID field. Find Input Mask under Field Properties -> General and click it. Then hit go to the toolbar -> Design tab -> Builder. This will walk you through it.
Input mask is not the answer for this. Input mask forces the user to input the data in a certain manner. What you need is some VBA code to run in the AfterUpdate event on a form. There's no way within the table to force the data into this pattern allowing the input method that you've requested.
There may be a more efficient way to do this, but this does the job.
http://pineboxsolutions.com/access/customeriddemo.accdb
i have a web database and im trying to filter a datasheet, based on the contents of a tempvar. Im trying to use the record source property of the datasheet to do this.
I need to do this because, every employee that logs in should only be able to see a given subset of data in the products table. In the employee table, i have an extra column with a string value which is the data that particular employee should see.
I have a login form that on clicking login, adds this string to the tempvars collection.I can see the tempvar has been added in the immediate window as shown below:
?tempvars!tmpgrpdsc -> "IAMS"
i use the query builder option to complete the record source property as shown below.
The problem is, nothing is returned !
But when i enter the string "IAMS", i get records returned.
However, i have done this with another datasheet and it has worked, the tempvar here held a number ! See below:
What am i missing or is there a better way to filter records based on the login. Thanks
What you showed should work.
However, have you tried to change the criteria to ="""" & [Tempvars]![tmpGrdsc] & """"
Also, to make sure that your tempvar is actually containing the data during the query, you could show it as a field, just to check exactly what data is being returned during the query:
SELECT Orders.*,
[Tempvars]![tmpGrdsc] AS TmpGrdsc
FROM Orders
I'm just learning how to use Access and while I've managed to muddle my way through most of what I'm trying to do, there's something I haven't been able to figure out how to do yet.
I have two forms and corresponding tables. In frmProducts is ColorOptions, a multi-select combobox containing a list of possible color options for a product, and Design, a text control for the name. In frmCustomers is OrderDesign, a combobox with a list of items from tblProducts, and OrderColours, a combobox.
Now, this is the problem: I want OrderColours to display list of the color options in tblProducts, but I can't figure out how. I can get it to display the value, but it's not a list of items, just one entry with the 'list' (e.g. a single entry reading "Brown,Red,Green"). I want the user to be able to select a single item from that subset.
Ideally I'd like to do this without messing with VBA or any advanced SQL, but if that's not possible then that's fine as well. I think the issue may be that the Colours field which contains the colours for that product is stored as text, but I'm not sure how else to store it as there's no 'array' or 'list' option for datatypes.
Sorry if I haven't been clear enough, or if this is posted in the wrong sub. I'm a beginner in Access, so I may have not been clear enough or used the wrong terminology. Any help would be much appreciated.
I'm not quite sure I understand exactly how you want this set up, so I'm assuming the following. Please correct me if this is not right:
tblProducts contains (at least) the two fields productDesign and productColour
It is possible for there to be multiple records in tblProducts with the same productDesign but different productColour (different colours of the same design)
There is another table, tblCustomers, in which each record contains a productDesign and one of the corresponding productColours.
So you need the combobox OrderColours to display a list of the possible productColours for the selected value of productDesign in OrderProducts.
Now, set up combobox OrderDesign as follows:
Row Source Type: Table/Query
Row Source: SELECT DISTINCT tblProducts.productDesign FROM tblProducts;
and OrderColour:
Row Source Type: Table/Query
Row Source: SELECT tblProducts.productColour, tblProducts.productDesign FROM tblProducts WHERE (((tblProducts.productDesign)=[Forms]![frmCustomers]![OrderDesign]));
Column Count: 1
and give OrderDesign the following event AfterUpdate:
Private Sub OrderDesign_AfterUpdate()
Me.OrderColour = Null
Me.OrderColour.Requery
Me.OrderColour = Me.OrderColour.ItemData(0)
End Sub
You may well also need to consider what happens when moving between records, if your comboboxes are bound:
Private Sub Form_Current()
Me.OrderColour.Requery
End Sub
in the Form_Current event should do the trick.
Read this for details.
The problem I am having is displaying the correct information in a combobox on an unbound form when a users views/edits data.
The table that populates the combobox:
tblLocation
idLocation
Location
Location Description
In the tblPerson table, there is a FK field called idLocation. I have a form that allows a user to pick a person from a listbox and displays the information in textboxes and comboboxes.
The combobox is setup with these items:
idLocation <--- column width set to 0
Location
The problem I am having is having the data show up correctly in the comobox when I view/edit a new person.
When a person is selected from a ListBox, the information from tblPerson should display in textboxes and comboboxes. The textboxes work just fine. However, I'm struggling with the comboboxes. Keep in mind all of the fields
My research finds only two methods on solving this problem:
DLOOKUP
Manual check and set
If I use the DLOOKUP method:
cmbLocation = (DLookup("Location", "tblLocation", "idLocation=" & .Fields("idLocation")))
The problem is that msgBox cmbLocation will display the text and not the FK. If the user tries to edit the data, but makes no changes, it will try to save the text and not the FK.
I found a manual way that does work, but I'm not sure it is the best approach:
For i = 0 To (cmbLocation.ListCount - 1)
If Val(cmbLocation.Column(0, i)) = Val(.Fields("idLocation").Value) Then
cmbLocation = cmbLocation.ItemData(i)
Exit For
End If
Next
Again, this works - but I have to think that I'm doing something wrong - probably something obvious.
Is there a better way to do this?
you can dynamically change which data is displayed in a combobox. in your scenario, i suggest you use the OnClick event of the listbox (once the person is selected). Add the following code:
YourComboBoxName.RowSource = "SELECT * FROM tblLocation WHERE idLocation=" & FK
If after clicking on a person, the data doesn't change in the combobox, you may need a Me.Refresh
Base the form on a query that left joins in the location column.
Then that field when bound to a text box will will display automatic and without any code. And better is if the actual location value changes, then no update code etc. is required. In fact this is the whole beauty of a relational database!
please forgive me for my poor english and my big ignorance on programming.
I'm using Ms Access 2003.
Let's suppose i have two tables:
Table1: ID (autonumber), [...], Keywords (memo)
Table2: ID (autonumber), Keyword (text)
I want:
1) As the user types letters in Table1.Keywords that my database searches in Table2.keyword for the nearest value and proposes it by autocompleting (just like google proposes a search word as you type)
2) When user presses ", " that he can add one more keyword in the same field (and the autocomplete still runs for this next value)
3) If he types a keyword not included in Table2 and press ", " that he is asked if he wants this value to be added in Table2
Well, i'm not sure if all these are clear... maybe they are a lot of things...
But i'd appreciate if you could help me...
Thanks in advance
J.
It would be complicated to do it with a single control, but with two controls, a dropdown list for choosing the value to add, and a textbox displaying the memo field, you could have the combo box's AfterUpdate event append a comma and the chosen value to the existing data. Something like this:
Private Sub cmbChooseKeyword_AfterUpdate()
If Not IsNull(me!cmbChooseKeyword) Then
Me!txtKeywordMemo = (Me!txtKeywordMemo + ", ") & Me!cmbChooseKeyword
End If
End Sub
You'd also want the rowsource of your combo box to not list items that are already entered, so this is one way that would work for a relatively short list of keywords:
SELECT tblKeywords.*
FROM tblKeywords
WHERE InStr(Forms!MyForm!txtKeywordMemo, tblKeywords.Keyword) = 0;
Then you'd add:
Me.Dirty = False
Me!cmbChooseKeyword.Requery
...at the end of the AfterUpdate code above (inside the End If):
Private Sub cmbChooseKeyword_AfterUpdate()
If Not IsNull(me!cmbChooseKeyword) Then
Me!txtKeywordMemo = (Me!txtKeywordMemo + ", ") & Me!cmbChooseKeyword
Me.Dirty = False
Me!cmbChooseKeyword.Requery
End If
End Sub
...and you'd want to add the requery to the OnCurrent event of your form, as well (so that when you arrive on a record, the combo box already omits any keywords that are already in the list).
Now, all that said, I'd completely recommend against doing this. This is a denormalized way to store the data, and this leads to problems:
what if you want to delete one keyword?
what if you want the keywords to be sorted in alphabeticsal order?
what if you have 100s of thousands of records and you want to search this field with LIKE "*Keyword*" -- will it bog down to be terribly slow (no indexes, and not used well even if there were)?
You really should use a proper many-to-many structure, with an additional table between the one where you're currently storing the keyword memo and your keyword list table. This "joins" the two, and would then give you a list.
You could then use a subform with a dropdown list to populate each row of the join table.
If you like presenting the keywords on reports as a comma-separated list (as you're currently storing them), you can write a simple function to do the concatenation for you at the presentation layer of your reports (concatenation functions for that purpose are a frequent Access question here on Stackoverflow).
Why not use a "Combo Box" and set its Row Source Type to Table/Query, and then make the Row Source a query on the second table. Just make sure you don't turn on Limit to List.
CodeSlave mentions a way that will work. But it will only work for one value. There is no way to do the multi-words-separated-by-commas thing. Only one word at a time.
As for the Adding new values. The combobox control support an OnNotInList event which can do what you say.
Seth