I'm trying to create a field to a database where the value is based on the sum of 2 other fields in the database which contains null values. I am trying to add
NZ([Number1])+NZ([Number2])
to the Expression in "Field Properties" "General" but access won't save it. Any ideas what i'm doing wrong?
If Access does not allow Nz() to be used in a Calculated field then you can use this instead:
IIf(IsNull([Number1]),0,[Number1])+IIf(IsNull([Number2]),0,[Number2])
Edit re: comment
To return Null if both components are Null, try
IIf(IsNull([Number1]) And IsNull([Number2]),Null,IIf(IsNull([Number1]),0,[Number1])+IIf(IsNull([Number2]),0,[Number2]))
Please follow these directions to add a calculated field to your table:
Open the table by double-clicking it in the Navigation Pane.
Scroll horizontally to the rightmost column in the table, and click the Click to Add column heading.
In the list that appears, click Calculated Field, and then click the data type that you want for the result. Access displays the
Expression Builder.
Begin typing the calculation that you want for this field, for example: Nz([Number1]) + Nz([Number2])
Note It is not necessary to precede the expression with an equal
sign (=).
Click OK. Access adds the calculated field, and then highlights the field header so that you can type a field name.
Type a name for the calculated field, and then press ENTER.
Related
New to MS Access and had a question. I am trying to add the value from txtKits and txtFG. I want them to show up in a seperate textbox called txtTotal that returns the value (the textbox also needs to non editable). Here is what the form looks like:
If the user enters just one of the two calculation fields, then I get the attached output. I want it to not give that output. It can stay blank until both are entered. Any help or suggestions?
You can check if both fields are numeric first in your calculated field:
=IIF(IsNumeric([Field1].Value) AND IsNumeric([Field2].Value); [Field1].Value + [Field2].Value; Null)
I have a report that has three params. one is dropdown. It created automatically when i supplied
name and value, Then If we select multivalue, it shows multivalue dropdownlist.
But I am not able to create a textbox. That will act as a parameter to be supplied in report.
for that I have created a parameter, set it to allow null and datatype = "text" .
parameter visibility is also visible but as a result I can see a textbox which is a disbled one.
How can this textbox be made to work?
While in the Report Parameter Properties for the text field in question, chose Allow blank value (rather than Allow null value). In the Default Values section of the properties dialog, choose Specify values, Add a blank default value.
Now you will have a working text field that the end user can type into, and you can use that value for searches in your query.
Hope this helps
To allow user to enter the parameter value manually:
Right click on the parameter and select Parameter Properties
On the Available Values tab, select None
Click OK
Now users can manually type in the parameter value.
Click to see screenshot
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
I did the following in MS Access: I made a form which had a combo box and a button. You select an option from there and click on the button and it is supposed to open a report. Now, I wrote a query selecting a few fields from a table and in the where clause, gave the condition as where name=str(combo1.value) and the report source was specified as this query. Now, when I select the value and click on the button, it opens a blank report. How can I make it load only those particular values?
I am not saving the combo box value anywhere. It said that it would remember the value for later use. Am I doing the right thing by not saving it? What should I do to make this work? Please help me!
Edit: The combo box is using values from a column 1 in a table X. I've not bound the value to any field and am using the "Remember the value for later use" option provided. The combo box is essentially a list of hotels and the report is a list of people staying at the selected hotel. When I put the ID of the field (as defined in the X), it works. But the thing is, it should refer to the names of the hotels and not the ID, which I am supposed to enter in a popup that asks for it. What do I do?
Edit 2: The query is as follows:
SELECT Table_1.Hotel_Name, Table_2.Name_of_Delegate, Table_2.Address, Table_2.City, Table_2.Center, Table_2.Spouse_Present, Table_2.No_of_Children, Table_2.No_of_Guests, Table_2.No_of_Rooms
FROM Table_1 INNER JOIN Table_2 ON Table_1.ID=Table_2.Hotel_of_Residence
WHERE Table_1.Hotel_Name=FormName.Combo7.Text;
When I click on the button (which opens the report), it asks for the name of the hotel in a popup box. How can I avoid this? What I am doing wrong?
You can use a WhereCondition with the DoCmd.OpenReport Method as a "dynamic WHERE clause" for your report's record source. Use something like this in the click event of the command button which opens your report.
DoCmd.OpenReport "YourReport", , , "[name]=" & Me.combo1
Remove the WHERE clause you added, where name=str(combo1.value), from the report's query.
I surrounded name with square brackets because name is a reserved word. See Problem names and reserved words in Access
Edit: In a comment, you said this about the combo box:
"Row Source is SELECT [Table_Name].[ID], [Table_Name].[Name] FROM [Table_Name];. Bound Column is 1 (which I assume shows the names I wish to be displayed in the combobox.)"
When you refer to the value of a combo box, that value is the value of the "Bound Column". So in your case, the bound column is 1, which means the combo value will be [Table_Name].[ID]. However, you want to open your report based on the [Name] column of the combo. So change the bound column of the combo from 1 to 2.
To open a report using the value of your combobox, in your report query you need to do the following:
SELECT fields
FROM table
WHERE YourValue = [Form]![FormName]![ComboBox Value]
You have to specify the name of the Form, plus the value so the report query knows the value. Hope this helps.
Guys...if I want to run a button click event that takes a list box and uses the ID field that is in the listbox in a SQL statement in VB, then is it
me.MyListbox.selected
or
me.MyListbox.value
to get that value? for some reason I have tried both and neither seem to be working. .value returns an empty value, and .selected generates an error stating the argument is not valid.
thanks
justin
If the ID is the bound column and the listbox is not multiselect, you can use just the name of the listbox without any other qualifier. If the ID is not the bound column, then use the column property to get the value : MyListBox.Column(n) where n is the column number starting from zero.
For multiselect listboxes, you need to iterate through the selected items to get a list to use with SQL.
If you are using the query design window or a control on a form or report, you cannot use Me, you must either use the full reference (Forms!Formname!ControlName) or for a control on the same form, just the name of the listbox.