You'll need to describe your database in more detail. Check to see if you have an auto-enter field option--either a looked up value setting or a calculation that might be changing the value on you.
Beyond that, please describe the set up for your pop up menu's value list in much more detail.
Thank you very much for your reply, I can explain the problem as follows:
suppose there is a pop-up contains the following values:
Each element is a field in a record in a related table. The record also contains other fields. Suppose there is a field called value contains the follows:
what I need is when I select the element B, in fact I need its corresponding value which is 120 in this example.
hope this clear enough
again thank you very much
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That does not explain what you posted first:
if I try to select another value it changes rapidly to the first one !!
What you describe is a basic "use values from field" value list combined with either a dynamic link or a look up or auto-enter option all made possible by a relationship. This is a very common thing to find in FileMaker solutions.
Say you have a layout based on a table named "invoice". In your value list, you want to select a customer and see the customer's contact info automatically appear on the invoice layout after selecting the customer. This first requires a relationship:
Invoices>----Customers (>---- means "many to one")
Invoices::_fkCustomerID = Customers::__pkCustomerID (__pkCustomerID would be the primary key in Customers.)
You can then set up a "use values from field" value list that lists values from Customers where field 1 is __pkCustomerID and Field 2 is the customer name. When you select a customer by name, the value list enters the ID.
You then use one of three methods to show information from Customers:
Define fields in Invoices that use the looked up value setting to copy info from Customers.
Define auto-enter calculations that copy info from customers
Put the actual fields from Customers on your Invoices layout.
It's important to understand the difference between a dynamic link--just putting the fields from customers on the invoices layout and a look up that copies the data. If you later edit this information in customers, the data that was copied does not change, but if you use a dynamic link, the customer data on your invoices layout will automatically update. Both approaches are useful in different situations.
Thank you very much.