c# - why i'm getting this error (Must declare the scalar variable "@param2"). for my code -


why i'm getting error must declare scalar variable "@param2". code 

string query = "insert cdr_info values(@param2,'" + values[1] + "' , '" + values[2] + "',  '" + values[3] + "',  '" + values[5] + "',  '" + values[7] + "',  '" + values[8] + "', '" + values[9] + "'," +             " '" + values[10] + "',  '" + values[12] + "',  '" + values[13] + "',  '" + values[14] + "', '" + values[17] + "', '" + values[21] + "',  '" + values[23] + "',  '" + values[24] + "',  '" + values[25] + "','" + values[26] + "',  '" + values[27] + "', '" + values[28] + "', '" + values[29] + "', " +             " '" + values[30] + "', '" + values[31] + "',  '" + values[32] + "',  '" + values[34] + "'," +             "'" + values[35] + "',  '" + values[37] + "',  '" + values[38] + "','" + values[39] + "', '" + values[40] + "', '" + values[41] + "','" + values[45] + "',  '" + values[46] + "',  '" + values[47] + "',  '" + values[48] + "'," +             " '" + values[52] + "', '" + values[53] + "',  '" + values[55] + "',  '" + values[59] + "',  '" + values[64] + "'," +             "'" + values[71] + "', '" + values[75] + "',  '" + values[85] + "', '" + values[93] + "', '" + values[94] + "',  '" + values[95] + "', '" + values[96] + "',  '" + values[97] + "', '" + values[98] + "',    '" + values[105] + "',  '" + values[106] + "')";                                                                    cmd.parameters.addwithvalue("@param2",values[0]); cmd = new sqlcommand(query, con);                                  cmd.executenonquery();

because reassign command after added parameter it.

try putting instructions in order:

cmd = new sqlcommand(query, con); cmd.parameters.addwithvalue("@param2",values[0]);

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