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.
Related
I have a store procedure which brings the data as shown below . I'm new to SSRS reporting, I would like to show only those row where "email" column is null. How can i achieve it in SSRS ? As i mentioned I'm very new to this , any screenshot will help me a lot. Thank you for your time.
For this problem, you'll want to change the row visibility to hide rows with a value in that column. I assume you're using a table or matrix to layout this data. You'll want to right click on the row where your data fields are entered. Specifically, the grey box at the left of the row.
From there, you'll need to select the option to Show or hide based on an expression.
And finally, you'll need to enter an expression that finds the values in the email field. I'm not exactly sure what the field names are called but something like the following expression should do it.
= Not IsNothing(Fields!EmailField.Value)
This will check the field where you get the email value with a built-in function of IsNothing. Additionally, since you want fields that do not contain values, the Not keyword reverses the results. If the function evaluates to true and a value is present, the row will be hidden and vice versa.
I have a column full of comboboxes. The comboboxes work fine on their own.
But if I right click on the column and apply a filter, e.g. sort alphabetically, the comboboxes still show with the correct entries, but I can no longer select another entry in the box. E.g. the box says "supplier", but I want to select "customer". Clicking on "customer" simply does nothing.
When I apply the filter, apparently the entire formula "refreshes" itself. Therefore I am currently trying to add some code to
Private Sub Form_ApplyFilter(Cancel As Integer, ApplyType As Integer).
However, being rather new to MS Access, I have no idea whether this is a step in the right direction and if so, what code I should have in Form_ApplyFilter in order to make my comboboxes clickable/updateable again.
The properties of the comboboxes are:
Row source type = Table/Query
Row source = SELECT Tbl_Liability.ID, Tbl_Liability.Liability FROM Tbl_Liability;
Bound column = 1
Enabled = Yes
Locked = No
And the form the comboboxes are in has ALLOW FILTERS set to YES (but no code in Form_ApplyFilter).
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).
How to a get the value of value selected in a combo-box? I have a combo-box called "cndGetUsage" in a form called "frmStationUsage". How do I get the value in the form and check to see if a value was selected?
This are being referenced from a module called mMainOutputs.
myval = Me.cndGetUsage.Column(1)
or
myval = [Forms]![frmStationUsage]![cndGetUsage].Column(1)
these will tell you what the current value in the box is. the columns are because in access your combo box can have multiple columns. also if you set the bound column then you don't have to specify it.
Where are you populating the list from? It works great if you're using a Select statement, from a table with a unique ID field as a unique key. Your combo box index is zero based. If you have more controls in the form you can use the Recordset Clone and Bookmark statements to move back and forth as you select items from the combo box
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.