EDIT REcords from gridview code

Please check the below code which i have marked as comment

This is my store procdure code in here all is ok but check my the asp.net code

USE [DBBJBPL1]
GO
/****** Object: StoredProcedure [dbo].[fabric_ins] Script Date: 21/12/2018 12:38:34 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
ALTER procedure [dbo].[fabric_ins]
(
-- @quality varchar(50)=null
--,@colors varchar(50)=null
--,@width decimal(18,2)=0.0
--,@length decimal(18,2) =0.0
--,@operationType int=0
--,@itemcode varchar(10)=null
--,@ret varchar(250) OUTPUT
@fabrictype varchar(50)=null
,@weave varchar(50)=null
,@colour varchar(50)=null
,@lamination bit=0
,@gsm int=0
,@width decimal(18,2)=0.0
,@operationType int=0
,@itemcode varchar(10)=null
,@ret varchar(250) OUTPUT
)
AS
BEGIN
if @operationType=0
begin
BEGIN TRY
SET NOCOUNT ON
SET XACT_ABORT ON
BEGIN TRANSACTION
insert into ItemMaster(itemcd,itemdescription,width,isLaminated,GSM,colour,mtype )
values
(
[dbo].[AUTO_DOC_CODE]('IC'),@fabrictype,@width,@lamination,@gsm,@colour,'FABRIC'
)
set @ret='S'
UPDATE documentnumber
SET doc_last_srl_no=SUBSTRING([dbo].[AUTO_DOC_CODE]('IC'),4,5),
doc_suff=dbo.fnGetFiscalYear(),
doc_no_last_update=GETDATE()
WHERE doctype='IC' and location='01'
COMMIT TRANSACTION
END TRY
BEGIN CATCH
IF @@TRANCOUNT > 0 AND XACT_STATE() <> 0
ROLLBACK TRAN
SET @RET=ERROR_MESSAGE();
END CATCH
end
else if @operationType=1
begin
select * from itemmaster where itemcd=@itemcode
end
else if @operationType=2
begin
update itemmaster set GSM=@gsm,colour=@colour,width=@width where itemcd=@itemcode
end
--else if @operationType=3
--begin
-- Delete ItemMaster where itemcd=@itemcode
--end
END

asp.net code