Using combo boxes in Access, Part 1 Data. Wright Information Services. Combo and list boxes are among the most powerful and versatile. Access. They allow you to control data entry by limiting. Microsoft Access Dependent Drop Down List Box. Control a second combo box from a independent combo box. See how to change displayed values and record source. Microsoft Access Filtering the results of a Microsoft Access query using a DropDown combo box You should be aware that you can limit the results of a database. Tips and techniques from FMS for building better applications in Microsoft Access, Visual Basic 6, VB6, VBA, Outlook, SQL Server, Visual Studio. NET, Internet, Office. Find as you type. This utility finds matching records with each keystroke you type. Access 20 provide this functionality in its datasheets, as other. The articles on this page will demonstrate some of the things you. Creating a combo box. To create a combo box, you can do one of the following in Design. Select the combo box icon in the Tools menu, and click on. Right click an existing text box or list box, and Change To. Combo Box Important combo box properties. If you go to the All tab of a combo boxs properties, you will. Some of these properties will be used every time. Property. Comment. Control Source. The table field that your combo box is bound to. If you. are using the combo box for searching or filtering, this. Row Source Type. This can have 3 values Value List, Table Query, or. Value lists are convenient if you have a restricted number. Say, the States of Australia. Using a table or. If. you use a value list, you must add the items directly to the. VBA if. required. Row Source. This is the data that you will see in the combo box. If. you have selected a custom function, it will be left blank. SQL. statement representing the underlying query. Column Count. The number of columns in the query or value list. Column Widths. Here, you define how wide each column will be. To hide a. column set its width to 0. The values that you enter here. US. centimetres for most other countries. List Width. Normally this is Auto, meaning that the drop down list. But if the. sum of the visible column widths is 1. Bottom line. match the List Width to the sum of the Column Widths if you. Limit to List. By default this is No. Set it to Yes if you want to. You will then need to use code to let them add the new item. Cascading combo boxes filtering one. It is often useful to be able to select a category from one combo. Setting this up requires 3 steps, which are detailed. Northwind sample database. Step 1 Create the first combo box. In the Northwind database, create a new form and call it. Choose. Products. Add 2 combo boxes to the form name the first. Suppliers, and the second cmb. Products. Set the properties of. Suppliers as follows Property. Value. Namecmb. Suppliers. Column Count. 2Bound Column. Column Widths. 0cm 5cm. Row Source. SELECT Suppliers. Supplier. ID, Suppliers. Company. Name FROM. Suppliers ORDER BY Suppliers. Company. Name Step 2 Create the second combo box. Set the properties of cmb. Products as follows Property. Value. Namecmb. Products. Column Count. 3Bound Column. Column Widths. 0cm 5cm 0cm. Row Source. SELECT Products. Product. ID, Products. Product. Name. Products. Supplier. ID FROM Products WHERE Products. Supplier. IDFormsfrm. Choose. Productscmb. Supplier Step 3 Add code to the first combo box that re queries the. Now, go back to cmb. Suppliers. In the properties, select the. Events tab and create the following code in the After Update event. Suppliers check HERE if you dont know how to create an. Private Sub cmb. SupplierAfter. Update. Me. cmb. Products. Requery. End Sub. The After Update event is triggered once you have made a. Requery method re evaluates the SQL. Products, so that the combo displays the appropriate list. Save the form, switch to Form. Update A. newer article shows a technique that works on continuous forms. Letting users choose any item from the second combo box. Sometimes you want to switch between having the second combo box. This tip. shows one way to achieve that by modifying the Row Source of the. Change the After. Update event for cmb. Supplier to this Private Sub SupplierAfter. Update. If Is. NullMe. Supplier Then. Me. Products. Row. Source SELECT Products. Product. ID, Products. Product. Name,. Products. Supplier. ID FROM Products. Me. cmb. Products. Row. Source SELECT Products. Product. ID, Products. Product. Name,. Products. Supplier. ID FROM Products. WHERE Products. Supplier. IDFormsfrm. Choose. Productscmb. Supplier. Me. Products. Requery. End Sub. If you clear cmb. Suppliers, the above code removes the WHERE. Products dependent on cmb. Suppliers. If. cmb. Suppliers has anything in it, the code resets cmb. Products to make. Suppliers again. For the user, this means that you can decide whether or not to. Finding or filtering records with a combo box. On a data entry form with many records, you may need to find a. The next two articles show how to do this. Finding a unique record. This example uses the Suppliers form in the Northwind sample. When we make a selection from the combo, we will move to. Hence, this. technique allows you to continue browsing the rest of the forms. Do the following Open the Suppliers form in Design view Open the Form Header to a height of 1cm, and add a new combo. Set up the combo box with these properties. Note the combo box is unbound does not have a Control. Source because it is used for searching, not for data entry. Property. Value. Namecmb. Supplier. Search. Column Count. 2Bound Column. Column Widths. 0cm 6cm. Row Source. SELECT Suppliers. Supplier. ID, Suppliers. Company. Name FROM. Suppliers ORDER BY Suppliers. Company. Name Width. Label Caption. Supplier Search. To navigate to the correct location, we need to move to the. ID matches the selected supplier. We can do this by. The following. code goes into the After Update event of the combo, which is. Private Sub cmb. Supplier. SearchAfter. Update. This sub allows you to go to a specific supplier instead of. Requires a reference to the Microsoft DAO 3. Object Library. Created by Denis Wright. Creation date 1. Sep 2. 00. 7. Dim rst. Form As DAO. Recordset. the recordsetclone is a copy of the forms recordset. Set rst. Form Me. Recordset. Clone. Find. First Supplier. ID Me. Supplier. Search. Me. Bookmark rst. Form. Bookmark. End Sub. For a tip on creating event code in Access, see. Filtering for records that match a particular value. The Find technique works well if the record is unique. But if you. need to see all orders from a particular client, a filter is. This technique filters the Orders form in the Northwind. Open Orders in Design view. View Form. HeaderFooter to display the header and footer set the. Add a combo box to the form header. This combo will also be. Property. Value. Namecmb. Find. Customer. Column Count. Bound Column. 1Column Widths. Row Source. SELECT Customers. Customer. ID, Customers. Company. Name FROM. Customers ORDER BY Customers. Company. Name Width. Label Caption. Show all orders for Now to add the code that filters the form. It will go in the. After. Update event of the combo box Private Sub cmb. Find. CustomerAfter. Update. Making a selection from this control filters the Orders form. Created 1. 9 Sep 2. Denis Wright. Dim s. Filter As String. ID is text so the ID value. Filter Customer. ID Me. Find. Customer. Me. Filter s. Filter. Me. Filter. On True.
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