sql server - Couldn't send and store String data to database through WCF -

i have created windows 8 app, have table in sql server database store people's name, " [name] varchar (50)"

i have manage send , save integer values database, when modified coding store string, not work, table data empty. please help!

itemdetail.html

<div> <input id="join1" type="text" /> <button id="joinbtn">insert</button> </div> 

itemdetail.js

var joinbutton = document.getelementbyid('joinbtn');         // register click event         joinbutton.addeventlistener("click", joinbuttonclick, false);          function joinbuttonclick() {             // retrieve element             var baseuri2 = "http://localhost:45573/addservice.svc/join";             var jointext = document.getelementbyid('join1').value;              winjs.xhr({                 type: "post",                 url: baseuri2,                 headers: { "content-type": "application/json" },                 data: '{"namet":' + jointext + '}'             }).then(function complete(request) {                 var resdata = request.responsetext;             }, function error(er) {                 var err = er.statustext;             })         } 

addservice.svc.cs

public void join(string namet)     {         string connectionstring = system.configuration.configurationmanager. connectionstrings["database1connectionstring1"].connectionstring;          sqlconnection con = new sqlconnection(connectionstring);         string sql = "insert table2(name) values (@name)";          sqlcommand cmd = new sqlcommand(sql, con);         cmd.parameters.addwithvalue("@name", namet);         try                {             con.open();             int numaff = cmd.executenonquery();         }             con.close();     } 

iaddservice.cs

 [operationcontract]     [webinvoke(requestformat = webmessageformat.json, responseformat = webmessageformat.json, bodystyle = webmessagebodystyle.wrapped)]     void join(string namet); 

thank you!

i think problem may in line

data: '{"namet":' + jointext + '}' 

try changing to

data: '{"namet":\'' + jointext + '\'}'