hi everyone

i am a fresher in asp.net and facing A problem in assigning values in dropdown list.
i have a registeration form in which there is a dropdownlist the code i use to fill the list is

Dim DtCntry As DataTable = ds.Tables("Tbl_Country")
cboCountry.DataSource = DtCntry
cboCountry.DataTextField = "Country"
cboCountry.DataValueField = "CountryId"
cboCountry.DataBind()

i want to update record.so i am assigning the feilds of selected record in page_load event
i have assign the value in dropdown as follows
    If Not Dt.Rows(0).Item("Industry_Id") Is DBNull.Value Then
            cboCountry.SelectedValue = Dt.Rows(0).Item("CountryId")
        End If

this work well but after page load and when i click the modify button and
try to read value the error comes
the error is Object reference not set to an instance of an object.

i am reading through this cboIndustry.SelectedValue

ankur bhargava

hi

somewhere some object has not been instantiated after clicking the button. Best to post your button and pageload code for me to assist you. May be db connection is closed.