asp.net - Data from input box not inserting in to database -

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i made form insert information in database. don't know error coming from. it's not inserting information input fields database.

here's code:

 protected sub button1_click(byval sender object, byval e system.eventargs) handles button1.click         dim id, name, description, code, cat_industry, cat_theme, cat_occasion, cat_budget string         id = product_id.text         name = product_name.text         description = product_description.text         code = item_code.text         cat_industry = industry.selectedvalue         cat_theme = theme.selectedvalue         cat_occasion = occasion.selectedvalue         cat_budget = budget.selectedvalue          try             dim str1 string = "insert product (id, product_name, product_description, item_code, industry, theme, occasion, budget) values ('" + id + "', '" + name + "', '" + description + "', '" + code + "', '" + cat_industry + "', '" + cat_theme + "', '" + cat_occasion + "', '" + cat_budget + "')"             con.open()             dim cmd new sqlcommand(str1, con)             cmd.executenonquery()             con.close()         catch ex exception             response.write(ex)         end try     end sub

your column names can't referenced product name , product description space - need escape [product name], [product description] etc.

but please refrain inserting data directly - instead should parameterizing input variables. has benefits both performance , security (sql injection) perspective.

 dim str1 string = "insert product (id, [product name], [product description], item_code, etc) " _                       " values (@id, @name, @description, @code, etc)"  con.open()  dim cmd new sqlcommand(str1, con)  cmd.parameters.addwithvalue("@id", id )  cmd.parameters.addwithvalue("@name", name )  ... etc  cmd.executenonquery()

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