wrong in my code in asp.net using stored procedure

try

{

bilnumber();

// partyname();

con = new SqlConnection(s);

con.Open();

string qry = "sectionexpenses";

cmd = new SqlCommand(qry, con);

cmd.CommandType = CommandType.StoredProcedure;

cmd.Parameters.Add("@sectionname", SqlDbType.VarChar).Value = Sectionselect.Text;

// cmd.Parameters.Add("@Expensestype", SqlDbType.VarChar).Value = DropDownList1.Text;

cmd.Parameters.Add("@ExpensesName", SqlDbType.VarChar).Value = Ddexpenz.Text;

cmd.Parameters.Add("@Date", SqlDbType.VarChar).Value = TdATE.Text;

cmd.Parameters.Add("@BillNo", SqlDbType.VarChar).Value = bil;

cmd.Parameters.Add("@BillAmount", SqlDbType.Float).Value = bamountsave.Text;

cmd.Parameters.Add("@currentdate", SqlDbType.VarChar).Value = TextBox4.Text;

cmd.Parameters.Add("@partydetz", SqlDbType.VarChar).Value = bil;

cmd.Parameters.Add("@bdate", SqlDbType.DateTime).Value = DateTime.ParseExact(TdATE.Text, "MM/dd/yyyy", CultureInfo.InvariantCulture);

int rs = cmd.ExecuteNonQuery();

if (rs == 1)

{

Response.Write("");

snoi.Visible = false;

Printdata.Focus();

}

else

{

Response.Write("");

}

}

catch

{

throw;

}

My procedure

set ANSI_NULLS ON

set QUOTED_IDENTIFIER ON

GO

ALTER PROCEDURE [dbo].[sectionexpenses]

(@sectionname varchar(30),

@ExpensesName varchar(max),

@Date varchar(30),

@BillNo varchar(max),

@BillAmount float,

@currentdate varchar(50),

@partydetz varchar(max),

@bdate datetime)

AS

DECLARE @Result int

BEGIN TRANSACTION

IF EXISTS

(

SELECT * FROM expenzsection WHERE sectionname=@sectionname

and partydetz=@partydetz and BillNo=@BillNo and BillAmount=@BillAmount

)

BEGIN

SELECT @Result = -1

END

ELSE

begin

insert into Expenzsection(sectionname,ExpensesName,Date,BillNo,BillAmount,currentdate,partydetz,bdate)

values

(

@sectionname,@ExpensesName,@Date,@BillNo,@BillAmount,@currentdate,@partydetz,@bdate

)

SELECT @Result = @@ERROR

end

IF @Result <> 0

BEGIN

ROLLBACK

END

ELSE

BEGIN

COMMIT

END

RETURN @Result