Null reference exception unhandled by user code

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C#

getdetails.Parameters.Add("@S_ID", SqlDbType.Int).Value = lbl.Text
            getdetails.Parameters.Add("@Name", SqlDbType.VarChar).Value = txt1.Text
            getdetails.Parameters.Add("@Subject", SqlDbType.VarChar).Value = txt2.Text
            getdetails.Parameters.Add("@Mark1", SqlDbType.VarChar).Value = txt3.Text
            getdetails.Parameters.Add("@Mark2", SqlDbType.VarChar).Value = txt4.Text

hi in this section(lbl.text) i am getting "Null reference exception unhandled by user code//" whay it means

Posted 14-Nov-11 0:22am

afsal.mp

Updated 14-Nov-11 0:33am

Mehdi Gholam

v2

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Prerak Patel · Answer 1 · 2011-11-14T00:24:00

Solution 1

Check in lbl is null at that point.
Google[^] for more.

Posted 14-Nov-11 0:24am

Prerak Patel

Updated 14-Nov-11 0:26am

v2

chandrashekhar racharla · Answer 2 · 2011-11-14T00:29:00

Solution 2

You have to convert to Int type there.

Posted 14-Nov-11 0:29am

chandrashekhar racharla