Forms Data Controls :: How To Validate A Text Box (if It Is Blank) Inside A List View Row, On Selected Index ?

i have a drop down list and a text box, inside a listview row (and this is a repeating layout). i populate each dropdownlist with same contents ( these contents/items come from a custom collection object).

i have added a required field validator in the listview's item template, that has its validation group = the validation group of the drop down list, and validates if the textbox is blank or not. this validation takes place on the selected index changed of the drop downlist for that row.

1. on selected index changed, EACH dropdownlist validates only its corressponding textbox perfectly (which is what i want)

but if i enter some text in one of the textboxes after doing 1, the dropdownlist for THAT particular row, assigns the correct value to the text entered. but for other rows (for which i changed their corresponding ddls to test the required field validation and for which the text boxes are still blank), their ddls by itself assign the values to the blank text without validating.

markup of code for listview is [Code]....

code behind for the ddl selected index changed is [Code]....

method GetIndexFromId retrieves index of the custom object inside a collection depending on the Id (which is a property) of the object.

i notice that the ddl selectedindexchanged is being hit as many number of times as many rows i change (i.e as many ddls in different rows i change to check the required field validation)