to populate one dropdown on selectedindexchanged of another inside gridview

Question

I have gridview with two dropdowns in a row say country and state,on change of country dropdown i want to populate the state dropdown when the grid is in edit state. I got both the dropdowns in RowEditing event of grid,also selectedindexchanged event is attached to first dropdown of grid.The problem is how to get second dropdown ie state dropdown in selectedindexchange event of country dropdown.

Answer 1

If RowEditing event occurs before dropdown selection changed event, you can store reference to current Row in you application. Then get this row in dropdown changed event.

Answer 2

protected void DropDownList2_SelectedIndexChanged(object sender, EventArgs e)
    {
        DropDownList ddl1 = (DropDownList)sender;
        GridViewRow row = (GridViewRow)ddl1.NamingContainer;
        if (row != null)
        {`enter code here`
            DropDownList ddl2 = (DropDownList)row.FindControl("DropDownList3");
            {
                //call the method for binding the second DDL based on the selected item on the first DDL
                DataTable dt = BindDropDownList(ddl1.SelectedItem.Text);
                ddl2.DataTextField = "Field1";
                ddl2.DataValueField = "Field2";
                ddl2.DataBind();
            }
        }
    }