How can I set a value to a Select2-Widget which is not in dropdown list? I load values from other table - but it is possible to deactivate entries there, they are not shown in list then. The problem is, that the value, which is not in list is not shown correctly, because the list does not know the item.
Is it possible to show (and on update save) the old value, but it should not be possible to select it from list again.
Related
So I'm using flutter in Android studio. I generated a list to show some values from am api that has data of things in a vending machine. 'Quantity' is how much of a item there is in the machine. When i set the state to increment a specific item in the list, the count for the single is increased or decreased for all the items not allowing me to update a single item. What i want to do is update the value for the quantity for a specific item only and save that data to the api. I did not set image like below
I believe you will have to set different values for those different items in a map file
like in your screenshot, you have doritoz, tortilas, etc etc
the action for clicking the button should be "doritozValue++" or "doritozValue--"
i don't think you can use a single value for the entire list
this is like working with a dropdown, if you want to set your list dinamicaly, you need not to have a quantity value var, you need to have a list of those vars, and you can access in your dinamically list by making a for, and accessing the determined quantity by: listQuantity[i], that is the determined quantity var for this determined object in the i position
In a form, I am displaying rows of data in the detail section.
Around 5% of the rows might actually have a float value in one column that I need to be displayed as a combobox. The column in question results from a left join, so it may have a float, or it may be null with no existing record behind it. I don't want to have 100000 rows added to a table just to show a zero in the combobox on the outside chance that a user actually displays that particular record. Yes, I can add the rows, then delete them later, but that seems stupid. For the life of me, I cannot figure out how to get the combobox to default to a zero for each row, and still be selectable. Basically for each row, show the value if there is one, zero otherwise, and let the user select a new value if they want.
The VBA side is easy. I can totally create the row if a non-zero value is selected, and delete the row if the user changes it to 0. Ideal would be to bind a combobox to NZ(myField,0), or something similar. When I tried that, the combobox was not selectable.
Right now my combobox is selectable, allows the users to change the value, but shows a blank, not zero if the column is null.
The SQL the form is bound to:
SELECT dbo.PersonClasses.ClassID, dbo.ClassDates.ClassDate, dbo.PersonClassHours.ClassHours
FROM dbo.PersonClasses
INNER JOIN dbo.ClassDates ON dbo.PersonClasses.ClassID = dbo.ClassDates.ClassID
LEFT OUTER JOIN dbo.PersonClassHours ON dbo.People.PersonID = dbo.PersonClassHours.PersonID AND dbo.ClassDates.ClassID = dbo.PersonClassHours.ClassID AND dbo.ClassDates.ClassDate = dbo.PersonClassHours.ClassDate
I am looking to represent ClassHours as a Combobox for each record on the form with valid selections being 0,.5,1,1.5,2,2.5. To keep it simple for the users, I want 0 to be preselected. This is how it looks now:
You could set the Format property of the combobox to
#;\0
This will display a zero if the field value is Null. Otherwise the actual value.
Other properties which will also need to be set are the Row Source Type to Value List and Row Source to 0;0.5;1;1.5;2;2.5
Using a function, such as Nz(), in your query to change the value of the field, actually creates a new field, which is read-only.
In your case you need the field to be updateable, so one of your options is to play around with the Format propery, or Conditional Formatting.
I am pretty much a newbie to using VBA in Access and I'm having trouble with something that seems like it should be quite simple.
I have two listboxes (called LB1_ID and LB2_ID) on my form (MainForm) that I want to list related IDs from their respective Row Sources. I need LB2 to be populated based on the selection in LB1. They both have Row Sources from the same Table (Table1) and it is a many to many relationship of Requirement IDs ("Req ID1" and "Req ID2"). My current form, which is not working, has the Row Source of LB1 as:
SELECT Table1.ID, Table1.[Req ID1] FROM Table1 ORDER BY Table1.ID;
and the Row Source of LB2 as:
SELECT Table1.ID, Table1.[Req ID2] FROM Table1 WHERE ([Forms]![MainForm]![LB1_ID]=Table1.[Req ID1]);
When I make a selection in LB1, nothing happens in LB2. The column widths are formatted correctly and I can get it to work if I use Me.[Forms]![MainForm]![LB1_ID] but I have to type out the LB1 selection manually in a popup box if I use that.
What am I missing?
If your listbox is multi-select, you cannot use a simple form reference as query criteria. If it is not multi-select, keep in mind that its value may be a hidden column (usually an ID field), so there are two possible issues and solutions:
Possible Issues:
Single-Select listbox has an ID field that is hidden (column width = 0") and you are matching it to the wrong field in your table. To check the output of the listbox, open the VBE and type ?[Forms]![MainForm]![LB1_ID] into the immediate window and press enter when your form is open in form view and a row is selected in LB1_ID. If the returned line is what you expect, then the problem must be elsewhere.
Multi-Select listbox property is enabled. In this case, your query will not work, because the listbox will only return Null. You will need to write some VBA to loop through the rows and figure out which ones are selected, which is a bit of a pain. Ultimately you'll build some code that will alter your query with the specific criteria for each selected row. Instead of explaining here, take a look at this article for a tutorial.
The .Requery method is still important to put in the AfterUpdate event of your first listbox to refresh the second.
Your query seems to work, but you need to refresh your listbox2 whenever you make selection into listbox1, so if both listbox are in the same form add this event handler :
Private sub LB1_ID_Change()
Me.LB2_ID.Requery
End sub
Without this, your listbox2 will only get populated once on load based on the initial value of listbox1.
Also, if you have not already done it, I would recommend to add your listbox1 control as a parameter into your listbox2 query (in query builder, right click -> parameters).
I am trying to use Link Master Fields to get a value from my form in order to filter some of my data and then show the remaining on my chart. Everything works perfectly fine but when I want to select more than one value (using a listbox to select multiple values for a field), my chart returns nothing.
I would like to know how can I address multiple values for a field in my chart so it filters the values on my chart as an "Or" function in SQL.
Imagine I want to have an SQL with: WHERE [MyTable].[Field1]= Selected values in listbox.
It seems that my SQL selects all the values in the listbox as One Value/And function.
You will need to do this via VBA.
Use the Change event on the list box to update the subforms recordsource.
Also make sure you execute the code in the forms Current event, so that it will display correctly when moving records, and on initial opening.
So with a bit of research and trying out different ways, an easy way is to use some hidden textboxes in the form and loop through the selected values and give each textbox one of the selected values in the listbox.
From there you can write a SQL for your chart specifying the condition so your field = Condition 1 or field = Condition 2.
This should probably be pretty simple but my Google-Fu is as yet unable to find an answer. I simply want to create a dropdown list in Access so that upon selection I can perform some action based on the value of the selection. For instance, I have a list of people and I would like to populate the combo box so that their names appear in the list but the "value" is set to their ID (the primary key).
It sounds like you might be asking how to display something in the dropdown other than the ID while keeping the ID as the returned data from the dropdown. If that's the case set the Bound Column to the ID field (usually 1) and (assuming the name field is next) set the Column Count to be 2 and the Column Widths to be 0";1" or 0";[whatever width you need].
You will need to hook into the onchange event for the dropdown list.
and from MSDN
How have you set the properties for your combo box?
Perhaps you could try setting (assuming you are pulling data from Table1 with fields ID and Field1
Row Source: SELECT [Table1].[ID], [Table1].[Field1] FROM Table1;
Row Source Type: Table/Query
Bound Column: 1
Column Count: 2
Column Widths: 0", 1"
and then hook into the onchange event as Chris Ballance suggests. The value property of the combo box is ID; the text will be what is in Field1.
OK, I figured it out even though it was a bit counter-intuitive. An Access Combobox can have as many values as you want (instead of just one key on value). By default all of the values are are shown in the list so you need to hide certain columns by setting their widths to 0. That is done via the ColumnsWidths property in the property pane. ColumnWidths takes a comma separated list of values which corresponds to the order of the columns in the list. I hope this helps someone.