Use the filter data in management software is extremely important, because in this way you can search and can do other operations on a limited number of values. A filter can be defined as a selection of criteria applied to each record in a table or query, can accept or reject the various values based on certain parameters to be determined by the user. In my business programs I designed and created a very simple method to filter the data: a property of the header list of Windows that have the style HDS_FILTERBAR. A control header of a listview is able to show a text box where you can enter the value to filter on and beside a small image in the shape of a funnel, classic symbol of the filter.
In my programs I made sure to activate the search every time you change the value of one of the filters, simply intercepting the message HDN_FILTERCHANGE, the filter itself when you press the button to the right of the text field, intercepting the message HDN_FILTERBTNCLICK and finally making the order each time you press the column header, intercepting the message HDN_ITEMCLICK. The result is exceptional, the user always has the data that interests them before your eyes with just a few simple steps and above all without opening any modal window.
Working on a subset of data is very useful if you need to treat only a particular type of value. For example: take the fruit and vegetables I put these two different types of goods in separate categories and then divide them ready to use. Let’s say you should load only vegetables, then you can filter out only the category “Vegetables” and work on a small set of goods, only that I need. You could do so many other examples, but the ability to filter the data in their management software is vital for those who have to work every day with thousands of different values in the database.