FORMAT EXCEPTION

Hi


I am continuously getting the error:





Exception Details: System.FormatException: Input string was not in a correct format.





Source Error:








Line 57: {


Line 58: Connection.Open() ;


Line 59: ThreadResult = ThreadCommand.ExecuteNonQuery() ;


Line 60: }


Line 61:





in the following part of the code :








protected void PostClick(object sender,EventArgs e)


{


SqlConnection Connection ;


SqlCommand ThreadCommand ;


SqlCommand GetThreadCommand ;


SqlCommand MessageCommand ;


SqlDataReader ThreadReader ;


string InsertThread,InsertMessage ;


string GetThread,Message ;


long ThreadID ;


int ThreadResult ;





Connection = new SqlConnection("server=HT; Integrated Security= SSPI; Database=Forums");


Feedback.Text = "" ;





InsertThread = "Insert Into Threads(ThreadName,TopicId) VALUES(@ThreadName,@TopicId)" ;


ThreadCommand = new SqlCommand(InsertThread, Connection) ;





ThreadCommand.Parameters.Add(new SqlParameter("@ThreadName", SqlDbType.VarChar,50)) ;


ThreadCommand.Parameters.Add(new SqlParameter("@TopicId", System.Data.SqlDbType.Int));





ThreadCommand.Parameters["@ThreadName"].Value = ThreadText.Text ;


ThreadCommand.Parameters["@TopicId"].Value = Request.QueryString["TopicId"] ;





try


{


Connection.Open() ;


ThreadResult = ThreadCommand.ExecuteNonQuery() ;


}





catch (System.Data.SqlClient.SqlException excp)


{


if (excp.Errors[0].Number == -105121349)


{


Feedback.Text = "<font color=red>*** There is already a thread with the name "+ThreadText.Text+". Please choose a different name and click Post.</font><br><br>" ;


}


else


{


Feedback.Text = "<font color=red>*** "+excp.Errors[0].Message +"<br><br>" ;


}


}











I would be very grateful for any suggestions.