I am using a Jquery Token Input plugin. I have tried to fetch the data from the database instead of local data. My web service returns the json result is wrapped in xml:
<?xml version="1.0" encoding="utf-8"?>
<string xmlns="http://tempuri.org/">[{"id":"24560","name":"emPOWERed-Admin"},{"id":"24561","name":"emPOWERed-HYD-Visitors"}]</string>
I have checked in the site http://loopj.com/jquery-tokeninput/ which says that the script should output JSON search results in the following format:
[
{"id":"856","name":"House"},
{"id":"1035","name":"Desperate Housewives"}
]
Both seems to be the same,but still i m not getting the items displayed in my page.
I am posting my code also. My Js code: DisplayTokenInput.js
$(document).ready(function() {
$("#textboxid").tokenInput('PrivateSpace.asmx/GetDl_info', {
hintText: "Type in DL Name", theme: "facebook",
preventDuplicates: true,
searchDelay: 200
});
});
My web-service code:
[WebMethod]
[ScriptMethod(UseHttpGet = true, ResponseFormat = ResponseFormat.Json)]
public string GetDl_info(string q)
{
string dl_input = string.Empty;
DataSet ds;
PSData ObjDl = new PSData();
ds = ObjDl.GetDistributionList(q);
List<DistributionList> DLObj = new List<DistributionList>();
foreach (DataRow datarow in ds.Tables[0].Rows)
{
DistributionList dl_list = new DistributionList();
dl_list.id = Convert.ToString(datarow["id"]);
dl_list.name = Convert.ToString(datarow["name"]);
DLObj.Add(dl_list);
}
dl_input = JsonConvert.SerializeObject(DLObj);
return dl_input;
}
}
public class DistributionList
{
public string id { get; set; }
public string name { get; set; }
}
I am posting the head portion of aspx code to show the library files i have included:
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>Untitled Page</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<link href="../Styles/jquery-ui-1.8.20.custom.css" rel="stylesheet" type="text/css" />
<link href="../Styles/token-input.css" rel="stylesheet" type="text/css" />
<link href="../Styles/token-input-facebook.css" rel="stylesheet" type="text/css" />
<script src="Scripts/Lib/jquery-1.7.2.min.js" type="text/javascript"></script>
<script src="../Scripts/jquery.tokeninput.js" type="text/javascript"></script>--%>
<script src="DisplayTokenInput.js" type="text/javascript"></script>
<head>
You need to make sure that your request is a POST request. Not a get request. See this answer to find out more about why: How to let an ASMX file output JSON
I would assume that the code for the plugin isn't setting the content-type for ajax requests to JSON, so you could do it yourself before the service call with $.ajaxSetup ie:
$.ajaxSetup({
contentType: "application/json; charset=utf-8"
});
UPDATE: Apparently asmx services sometimes have issues with the 'charset=utf-8' portion, so if that doesn't work you could try just 'application/json'
UPDATE 2:
I don't think it's the contentType causing the issue, use the following to force a POST for ajax requests and see if this fixes it:
$.ajaxSetup({
type: "POST", contentType: "application/json; charset=utf-8"
});
UPDATE 3:
There is a default setting inside the plugin you're using that can change the requests from GET to POST. See here on it's GitHub repo: jquery.tokeninput.js
and in your copy of the js file in the project, change the line:
var DEFAULT_SETTINGS = {
// Search settings
method: "GET",
to
var DEFAULT_SETTINGS = {
// Search settings
method: "POST",
I also assume that the plugin constructs the query in a way that ignores the global jquery ajax settings anyway, so you shouldn't need to include my earlier snippets anymore.
来源：https://stackoverflow.com/questions/13558856/what-should-be-the-correct-response-from-web-service-to-display-the-jquery-token