How To Tackle Some Filtering

Nov 18, 2009

working on a little app which requires the user to select items from a listbox bound to a dataview, then adding selected items to a new table. In the new table calculations are done, and so far its all working pretty good. The problems comes in is that there are many values and types to filter and I am having some trouble with the search aspects. So far in my code I am going about the problem using the datatables in this manner:

to sum it up:

form loads initial data to table
displays it in a dataview bound to a listbox
dataview is filtered using rowfilter queries, controlled in various manner
dataview is converted to table, then selected row is imported to final table
Calculations done on final table values

So far its pretty damn fast and works well, however the searching needs refinement. To give you an idea here is *some* of the search criteria in one of my rowfilter calls.

color:
red
black

[code]....

Form is requested to be as so:

6 checkboxes, and 12 numericupdowns (spin) buttons I have a seperate method to enable/disable them dynamically.

Have a look at the select row query: its getting messy already.Although I am specifying max and min values it seems to only filter by the max value and color, so something is wrong here...but i think it is just syntax... but already its getting a little long, just wait until i add the types as well..

Public Sub mainFilter()
' variables to enable filtering by color
Dim red = ""
Dim black = ""

[code]....

So basically is there a better way for me to go about filtering these table values? I notice in visual studio I can add queries to the dataset in there and they work quite well directly on the source table, without using a dataview and temptable, but when I open the query builder I can't add variables to the queries, which would force me to make queries for every foreseable scenario, and add buttons or menus to activate them all....not good.is there a way to hand code these queries with variables?

alternatively I thought about making a little rowfilter query builder, that substitutes variables for the rowfilter syntax, using some simple control flow, perhaps select case and then add them to the rowfilter query as the user enables/disables them in the form.i.e.

if RedCheckbox1 then
Redvar = "Color = 'Red'"
Maxvar = " & spinMax.value & "'

[code]....

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