msnodesql的使用

var sql=require('msnodesql');
var conn_str="Driver={SQL Server Native Client 11.0};Server={127.0.0.1};Database=AccJiaowu;uid=sa;PWD=XXX;";

//添加
var insert = function(sqlscript,callback) {
   sql.open(conn_str, function (err, conn) {
        if (err) {
            console.log('发生错误');
        }
        sql.queryRaw(conn_str,sqlscript, function (err, results) {
            if (err) {
                console.log(err);
                callback(JSON.stringify("error"));
            }else {
                callback(JSON.stringify("ok"));
            }
        });
    });
}

//修改
var update = function(sqlscript,callback) {
   sql.open(conn_str, function (err, conn) {
        if (err) {
            console.log('发生错误');
        }
        sql.queryRaw(conn_str, sqlscript, function (err, results) {
            if (err) {
                console.log(err);
                 callback(JSON.stringify("error"));
            }
            else {
                callback(JSON.stringify("ok"));
            }
        });
    });
}

//查询返回集合
var selectList = function(sqlscript,callback) {
    sql.open(conn_str, function (err, conn) {
        if (err) {
            console.log('发生错误');
        }
        sql.queryRaw(conn_str, sqlscript, function (err, results) {
            if (err) {
                console.log(err);
            }else {
                 var txt=toJsonArray(results);
                 var jsonObj=eval("("+txt+")");
                 console.log(jsonObj);
                 callback(jsonObj);
            }
        });
    });
}

//查询返回单个数据
var selectOne = function(sqlscript,callback) {
    sql.open(conn_str, function (err, conn) {
        if (err) {
            console.log('发生错误');
        }
        sql.queryRaw(conn_str, sqlscript, function (err, result) {
            if (err) {
                console.log(err);
            }else {
                 var txt=toJson(result);
                 var jsonObj=eval("("+txt+")");
                 console.log(jsonObj);
                 callback(jsonObj);
            }
        });
    });
}

//将查询结果转成json串
function toJson(dt)
{
    var jsonString;
    if (dt != undefined && dt.rows.length == 1)
    {
        var rowLen=dt.rows.length;
        var colLen=dt.meta.length;
        jsonString="{";
        for (var j = 0; j < colLen; j++)
        {
            if (j < colLen - 1)
            {
                jsonString+=""" + dt.meta[j].name + "":" + """ + dt.rows[0][j]+ "",";
            }
            else if (j == colLen - 1)
            {
                jsonString+=""" + dt.meta[j].name + "":" + """ + dt.rows[0][j] + """;
            }
        }

        jsonString+="}";
        return jsonString;
    }
    return jsonString;
}

//将查询结果转成json数组
function toJsonArray(dt)
{
    var jsonString;
    if (dt != undefined && dt.rows.length > 0)
    {
        var rowLen=dt.rows.length;
        var colLen=dt.meta.length;
        jsonString="{";
        jsonString+=""data":[";
        for (var i = 0; i < rowLen; i++)
        {
            jsonString+="{";
            for (var j = 0; j < colLen; j++)
            {
                if (j < colLen - 1)
                {
                    jsonString+=""" + dt.meta[j].name + "":" + """ + dt.rows[i][j]+ "",";
                }
                else if (j == colLen - 1)
                {
                    jsonString+=""" + dt.meta[j].name + "":" + """ + dt.rows[i][j] + """;
                }
            }
            if (i == rowLen - 1)
            {
                jsonString+="}";
            }
            else
            {
                jsonString+="},";
            }
        }

        jsonString+="]}";
        return jsonString;
    }
    return jsonString;
}
exports.insert = insert;
exports.update = update;
exports.selectOne = selectOne;
exports.selectList = selectList;

var handlers = require("./handlers");

var result = "";

var http = require('http'),
    url = require("url");
http.createServer(function (req,res){

var arg = url.parse(req.url,true).query;  //方法一arg => aa=001&bb=002
console.log(arg);
console.log(url.parse(req.url).query);
var userID = arg.userID;
var userName = arg.userName;
var password = arg.password;
var age = arg.age;
var pathname = url.parse(req.url).pathname;

console.log("userID:"+userID+";userName:"+userName+";password="+password+";age:"+age+";pathname:"+pathname);

if(pathname == "/selectList"){
    var selSql = "select userID,userName,password,age from Table_1 with(nolock) ";
    handlers.selectList(selSql,function(data){
    console.log("select data:"+data);
    result = data;
  });
}else if(pathname == "/selectOne"){
    var selSql = "select count(1) as cnt from Table_1 with(nolock) where userName ='"+userName+"' and password='"+password+"'";
    handlers.selectOne(selSql,function(data){
    console.log("select data:"+data);
    result = data;
    });
}else if(pathname == "/insert"){
     var insSql = "insert into Table_1 (userName,password,age) values('"+userName+"','"+password+"',"+ age +")";
     handlers.insert(insSql,function(data){
     console.log("insert data:"+data);
     result = data;
   });

}else if(pathname == "/update"){
    var updSql = "update Table_1 set userName = '"+userName+"',password = '"+password+"',age = "+age+" where userID = "+userID;
    handlers.update(insSql,function(data){
     console.log("update data:"+data);
     result = data;
  });

}

   //res.writeHead(200,{'Content-Type':'text/html;charset=utf-8'});  //'Access-Control-Allow-Origin':'http://localhost/'}
   console.log(result);
   var str = arg.callback + '(' + JSON.stringify(result) + ')'
   console.log(str);
   res.end(str);

}).listen(8080,"localhost");

$.ajax({
         url: 'http://localhost:8080/selectList',   //请求的是3000端口，应该属于跨域调用，因此dataType用jsonp
         dataType: "jsonp",
         //jsonpCallback: "_test",       //可以自定义‘处理’函数，默认是callback
         cache: false,
         jsonp:'callback',               //默认的传递处理函数是callback
         timeout: 5000,
         data : {},
         success: function(data) {
             var userList = data.data;
             var tabStr="";
             for(var i=0;i<userList.length;i++){
                 tabStr += "<tr>";
                 tabStr += "<td>"+userList[i].userID+"</td>";
                 tabStr += "<td>"+userList[i].userName+"</td>";
                 tabStr += "<td>"+userList[i].password+"</td>";
                 tabStr += "<td>"+userList[i].age+"</td>";
                 tabStr += "</tr>"
             }
             $("#dataTab").html(tabStr);
         },
         error: function(jqXHR, textStatus, errorThrown) {
             alert('error ' + textStatus + " " + errorThrown);
         }
    });