c# - 1 button Insert and Update 2 tables -

i have asp.net page button want submit data sql database. i'm trying run insert command on 1 table , update command in table. keep getting error:

incorrect syntax near ','.  line 242:                    cmd.parameters.addwithvalue("@clc", clc); line 243:                    cmd.parameters.addwithvalue("@rmkc", rmkc); line 244:                    cmd2.executenonquery(); line 245:                } line 246: 

i can't seem see why there's issue. maybe there's better way this?

string conn = configurationmanager.connectionstrings["conn"].connectionstring;         using (sqlconnection sqlcon = new sqlconnection(conn))         {             sqlcon.open();             using (sqlcommand cmd = new sqlcommand())             {                 cmd.commandtext = "insert tblhistory4 ([tanknum],[hft],[hin]) select @tanknum,@hft,@hin";                 cmd.parameters.addwithvalue("@tanknum", tanknum);                 cmd.parameters.addwithvalue("@hft", hft);                 cmd.parameters.addwithvalue("@hin", hin);                 cmd.connection = sqlcon;                 cmd.executenonquery();             }             using (sqlcommand cmd2 = new sqlcommand())             {                 cmd2.commandtext = "update gpcurrentgauge4 set hft=@hftc,hin=@hinc,hfx=@hfxc tanknumid=@tanknumid";                 cmd2.parameters.addwithvalue("@tanknumid", tanknumid);                 cmd2.parameters.addwithvalue("@hftc", hftc);                 cmd2.parameters.addwithvalue("@hinc", hinc);                 cmd2.parameters.addwithvalue("@hfxc", hfxc);                 cmd2.connection = sqlcon;                 cmd2.executenonquery();             }         }     } } 

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