C#拼接长字符串，根据是否查询到值来动态赋值。

本文主要是介绍C#拼接长字符串，根据是否查询到值来动态赋值。，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

//查询语句写在这try{while (reader.Read()){if (reader.HasRows){JSONstring += "{";JSONstring += "\"" + "wx_id" + "\":\"" + reader.GetString("wx_id") + "\",";beNeck = reader.GetString("beNeck");if (beNeck != "0"){                                    JSONstring += "\"" + "beNeck" + "\":\"" + reader.GetString("beNeck") + "\",";JSONstring += "\"" + "neckN" + "\":\"" + reader.GetString("neckN") + "\",";JSONstring += "\"" + "neckCR" + "\":\"" + reader.GetString("neckCR") + "\",";JSONstring += "\"" + "neckRAN" + "\":\"" + reader.GetString("neckRAN") + "\",";JSONstring += "\"" + "neckRSN" + "\":\"" + reader.GetString("neckRSN") + "\",";JSONstring += "\"" + "neckChN" + "\":\"" + reader.GetString("neckChN") + "\",";}beShoulderW = reader.GetString("beShoulderW");if (beShoulderW != "0"){
JSONstring += "\"" + "beShoulderW"+ "\":\"" + reader.GetString("beShoulderW") + "\",";
JSONstring += "\"" + "shoulderWN" + "\":\"" + reader.GetString("shoulderWN") + "\",";
JSONstring += "\"" + "shoulderWCR" + "\":\"" + reader.GetString("shoulderWCR") + "\",";
JSONstring += "\"" + "shoulderWRAN" + "\":\"" + reader.GetString("shoulderWRAN") + "\",";
JSONstring += "\"" + "shoulderWRSN" + "\":\"" + reader.GetString("shoulderWRSN") + "\",";
JSONstring += "\"" + "shoulderWChN" + "\":\"" + reader.GetString("shoulderWChN") + "\",";}JSONstring = JSONstring.TrimEnd(specialChars);JSONstring += "},";JSONstring = JSONstring.TrimEnd(specialChars);JSONstring += "]";                    }}}catch{              reader.Close();}finally{              reader.Close();}Response.Write(MysqlHelper.Encrypt(JSONstring));