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In given code , i am generating id but some times it generate null value please help
obj.insertvolunteer(vfname.Text, vlname.Text, vmobno.Text, CType(Session("csgb"), Integer))
                vuid = obj.getvolunteerid(vfname.Text, vlname.Text, vmobno.Text)
                Session("user") = Me.vfname.Text + Me.vlname.Text + vuid.ToString
                obj.updateunm(vuid, Session("user"))  'generate id
                Session("vlogged") = "1
Posted 21-Apr-13 18:57pm

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Solution 1

Debug and step through the code in updatenum method. It should give you the cause of this null value.
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