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Getting Error Variable is used before it has been assigned a value. A null reference exception could result at runtime.

newtoperlpgm
newtoperlpgm asked
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Last Modified: 2015-03-02
Here is my code.
 Public Shared Function GetObsSNames(ByVal strObsStIDs As String) As String
            Dim strWhere As String = Append(strWhere, "ObsSID IN (" & strObsSIDs & ")", " AND ")
            Dim strSql As String = "SELECT * FROM ObsS WHERE " & strWhere
            Dim strSNames As String = ""
            Dim strTitle As String = ""
            Dim objSql As New SqlDataAccess(GetConnectionString(True), strSql, CommandType.Text)
            objSql.ExecuteReader()
            While objSql.Read
                strTitle = objSql.GetString("Title")
                strSNames = strSNames & " " & strTitle
            End While
            objSql.CloseAll()
            Return strSNames
        End Function
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