Access Developer 26
Two Search Forms: Filter Boxes, Criteria Table
In this class we will start out by fixing a bug from Developer 25 that one of the students discovered. Then we will build two different search forms. The first will use filter boxes over the column headers. These filter boxes will be used to construct a dynamic SQL statement that feeds a list box. The column headers will also be used to control the sort. Then the second search form will have criteria stored in a table that you can easily manipulate. We will then use a recordset to read in the criteria from the table to build an SQL statement. Cool, new stuff!
In Lesson 1, we will fix a bug that one of our students found from D25. When you go to ship an order, the system sees the product groups as products which have zero stock. We'll fix that.
In Lesson 2, we will begin building a search form that will filter records in a list box using a Dynamic SQL Statement. This essentially creates an SQL statement based on the values selected on the form. In this lesson we'll create the form, set up header labels that will control the sort with an ORDER BY condition. Click on a header to sort by that column. We'll add spiffy colors. We'll see how to always sort NULL values on the bottom of the list.
In Lesson 3, we will add filter boxes and build the dynamic WHERE condition. Filter by whatever columns you want. We'll add a combo box so you can select either an OR or AND condition.
In Lesson 4, we will take the search form to a whole new level. We will create a criteria table. We'll use a recordset to read the conditions out of the table and construct the SQL statement. This way you can add as many different criteria as you want for multiple fields, or the same field. For example you could say "State equals Florida AND FirstName starts with R AND CreditLimit <= 5000 AND CreditLimit > 1000." Sky's the limit with this one! We'll learn how to read field data types from a TableDef.
In Lesson 5, we will create a combo box that has a list of all of the fields in the selected table. We will read that list of fields from the TableDef Fields collection. Then we will make a button to add the criteria to the table and update the results.
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