filling dropdownlist based on first in Gridview

rakeshbindal4 · October 17th, 2007, 01:45 AM

Hi All and Thanks in Advance
I Want to fill my second dropdownlist based on the value of the first dropdownlist inside my gridview.So whenever client changes its selection in first dropdownlist second one will be updated based on the first selected value

mike_remember · October 17th, 2007, 06:55 AM

A simpler and quicker example can be as below (though I haven't tested it properly).

You can declare a selection change event for the first dropdown, set its autopostback to true, now you can loop through the rows of datagrid, find the dropdowns and can add items as below:

Code:

protected void Lst_SelectedIndexChanged(object sender, EventArgs e)
        { 
            DropDownList lst1, lst2;
            for (int iGridRow = 0; iGridRow <= dg.Items.Count - 1; iGridRow++)
            {
                lst1 = (DropDownList)dg.Items[iGridRow].FindControl("lst1");
                lst2 = (DropDownList)dg.Items[iGridRow].FindControl("lst2");

                if (lst1.SelectedValue != "0")
                    lst2.Items.Add(new ListItem(lst1.SelectedItem.Text, lst1.SelectedItem.Value));
                else
                    lst2.Items.Clear();
            }
        }

Regards
Mike