Remove duplicate values from dropdownlist

Then check whether your data has duplicate values

Also remove the default items if they are not needed

Sir,

I have tried what you said it does not work..

At page load i load all the 4 dropdownlist and at gridview selectedindex changed event i must show the selected value in the dropdownlist...

I am using

GridviewRow row=Gv.selectedrow;

drptask.selecteditem.text=row.cell[1].text;

The dropdownlist now has duplicate values.

Before Binding the dropdown clear it

ddl.Items.Clear()

Sir,

I tried even that does not work..

When i select a row in gridview i must populate the dropdownlist with the selected values.. But no duplicates should be there in dropdownlist

Well this will work. Other than this there's no way to clear dropdown.

Wherever you bind the dropdown.

You call the functions in following order

ddl.Items.clear();

ddl.DataSource = dt;

ddl.DataBind();